zh/UserGuide/V0.8.x/7-TsFile/2-Usage.html - iotdb-website - Git at Google

 <!DOCTYPE html>
 <html lang="zh-CN">
   <head>
     <meta charset="utf-8">
     <meta name="viewport" content="width=device-width,initial-scale=1">
     <title> </title>
     <meta name="generator" content="VuePress 1.8.2">
     <link rel="icon" href="/favicon.ico">
     <meta name="description" content=" ">
     <meta name="Description" content="Apache IoTDB: Time Series Database for IoT">
     <meta name="Keywords" content="TSDB, time series, time series database, IoTDB, IoT database, IoT data management,时序数据库, 时间序列管理, IoTDB, 物联网数据库, 实时数据库, 物联网数据管理, 物联网数据">
     <meta name="baidu-site-verification" content="wfKETzB3OT">
     <meta name="google-site-verification" content="mZWAoRY0yj_HAr-s47zHCGHzx5Ju-RVm5wDbPnwQYFo">

     <link rel="preload" href="/assets/css/0.styles.f7fca28c.css" as="style"><link rel="preload" href="/assets/js/app.22278a52.js" as="script"><link rel="preload" href="/assets/js/3.9588d9cb.js" as="script"><link rel="preload" href="/assets/js/4.e8b2d372.js" as="script"><link rel="preload" href="/assets/js/605.1d68da53.js" as="script"><link rel="prefetch" href="/assets/js/10.39ee1d2a.js"><link rel="prefetch" href="/assets/js/100.bff72449.js"><link rel="prefetch" href="/assets/js/101.a86c3239.js"><link rel="prefetch" href="/assets/js/102.0907f33f.js"><link rel="prefetch" href="/assets/js/103.d67be398.js"><link rel="prefetch" href="/assets/js/104.e76aba8d.js"><link rel="prefetch" href="/assets/js/105.94c133eb.js"><link rel="prefetch" href="/assets/js/106.382a3189.js"><link rel="prefetch" href="/assets/js/107.fa637992.js"><link rel="prefetch" href="/assets/js/108.c5ae2b19.js"><link rel="prefetch" href="/assets/js/109.b6314ae7.js"><link rel="prefetch" href="/assets/js/11.e6c21699.js"><link rel="prefetch" href="/assets/js/110.aab90295.js"><link rel="prefetch" href="/assets/js/111.2dcc4bcf.js"><link rel="prefetch" href="/assets/js/112.a9c773e0.js"><link rel="prefetch" href="/assets/js/113.d739102d.js"><link rel="prefetch" href="/assets/js/114.25c9d02f.js"><link rel="prefetch" href="/assets/js/115.dc88a061.js"><link rel="prefetch" href="/assets/js/116.1713baca.js"><link rel="prefetch" href="/assets/js/117.14868556.js"><link rel="prefetch" href="/assets/js/118.b9358bab.js"><link rel="prefetch" href="/assets/js/119.f870b247.js"><link rel="prefetch" href="/assets/js/12.e5b9a86c.js"><link rel="prefetch" href="/assets/js/120.676ddbb9.js"><link rel="prefetch" href="/assets/js/121.96229d78.js"><link rel="prefetch" href="/assets/js/122.c05f9558.js"><link rel="prefetch" href="/assets/js/123.64030c32.js"><link rel="prefetch" href="/assets/js/124.f8208138.js"><link rel="prefetch" href="/assets/js/125.c5d5d0e5.js"><link rel="prefetch" href="/assets/js/126.cfdcf009.js"><link rel="prefetch" href="/assets/js/127.f40e3ef3.js"><link rel="prefetch" href="/assets/js/128.aea374a7.js"><link rel="prefetch" href="/assets/js/129.e97f8455.js"><link rel="prefetch" href="/assets/js/13.8ad6d0a5.js"><link rel="prefetch" href="/assets/js/130.b6164b90.js"><link rel="prefetch" href="/assets/js/131.aa31f362.js"><link rel="prefetch" href="/assets/js/132.fa6f1744.js"><link rel="prefetch" href="/assets/js/133.fe1acb82.js"><link rel="prefetch" href="/assets/js/134.5f6771b6.js"><link rel="prefetch" href="/assets/js/135.fd40c728.js"><link rel="prefetch" href="/assets/js/136.d58f1423.js"><link rel="prefetch" href="/assets/js/137.c78a0fdd.js"><link rel="prefetch" href="/assets/js/138.7c0c1ebf.js"><link rel="prefetch" href="/assets/js/139.67eb3dfd.js"><link rel="prefetch" href="/assets/js/14.23db3473.js"><link rel="prefetch" href="/assets/js/140.5163ab1d.js"><link rel="prefetch" href="/assets/js/141.3ccaab25.js"><link rel="prefetch" href="/assets/js/142.6355d572.js"><link rel="prefetch" href="/assets/js/143.950d5e99.js"><link rel="prefetch" href="/assets/js/144.96c41aa0.js"><link rel="prefetch" href="/assets/js/145.77307c91.js"><link rel="prefetch" href="/assets/js/146.46b25981.js"><link rel="prefetch" href="/assets/js/147.69e727d6.js"><link rel="prefetch" href="/assets/js/148.75b069c3.js"><link rel="prefetch" href="/assets/js/149.fe5ea361.js"><link rel="prefetch" href="/assets/js/15.6924f7af.js"><link rel="prefetch" href="/assets/js/150.805fabea.js"><link rel="prefetch" href="/assets/js/151.0d48042e.js"><link rel="prefetch" href="/assets/js/152.59a55390.js"><link rel="prefetch" href="/assets/js/153.d789321d.js"><link rel="prefetch" href="/assets/js/154.6823726a.js"><link rel="prefetch" href="/assets/js/155.eae06159.js"><link rel="prefetch" href="/assets/js/156.f69ae5f5.js"><link rel="prefetch" href="/assets/js/157.a0135797.js"><link rel="prefetch" href="/assets/js/158.2e780e6f.js"><link rel="prefetch" href="/assets/js/159.ff096eab.js"><link rel="prefetch" href="/assets/js/16.0394c19a.js"><link rel="prefetch" href="/assets/js/160.55b6cec8.js"><link rel="prefetch" href="/assets/js/161.712596d7.js"><link rel="prefetch" href="/assets/js/162.72425e04.js"><link rel="prefetch" href="/assets/js/163.b2dc0161.js"><link rel="prefetch" href="/assets/js/164.16b5aa8f.js"><link rel="prefetch" href="/assets/js/165.67e0cc7f.js"><link rel="prefetch" href="/assets/js/166.3177e2ab.js"><link rel="prefetch" href="/assets/js/167.fe97d42d.js"><link rel="prefetch" href="/assets/js/168.6ec28095.js"><link rel="prefetch" href="/assets/js/169.6bc52082.js"><link rel="prefetch" href="/assets/js/17.d3c13e63.js"><link rel="prefetch" href="/assets/js/170.af55e29f.js"><link rel="prefetch" href="/assets/js/171.209d42e2.js"><link rel="prefetch" href="/assets/js/172.c7a93fd1.js"><link rel="prefetch" href="/assets/js/173.e8cbade4.js"><link rel="prefetch" href="/assets/js/174.d07f973b.js"><link rel="prefetch" href="/assets/js/175.64ad19eb.js"><link rel="prefetch" href="/assets/js/176.13a969f1.js"><link rel="prefetch" href="/assets/js/177.897708b8.js"><link rel="prefetch" href="/assets/js/178.fa9def45.js"><link rel="prefetch" href="/assets/js/179.11fc2a44.js"><link rel="prefetch" href="/assets/js/18.268b0005.js"><link rel="prefetch" href="/assets/js/180.7fd08995.js"><link rel="prefetch" href="/assets/js/181.ecee03de.js"><link rel="prefetch" href="/assets/js/182.174768f9.js"><link rel="prefetch" href="/assets/js/183.0945adf0.js"><link rel="prefetch" href="/assets/js/184.a8b315a0.js"><link rel="prefetch" href="/assets/js/185.6570d0a2.js"><link rel="prefetch" href="/assets/js/186.29c79a10.js"><link rel="prefetch" href="/assets/js/187.bb1b7d3b.js"><link rel="prefetch" href="/assets/js/188.db28cde0.js"><link rel="prefetch" href="/assets/js/189.02b808d9.js"><link rel="prefetch" href="/assets/js/19.554dfad4.js"><link rel="prefetch" href="/assets/js/190.293b8b28.js"><link rel="prefetch" href="/assets/js/191.b8e99668.js"><link rel="prefetch" href="/assets/js/192.01a71587.js"><link rel="prefetch" href="/assets/js/193.bf0c0362.js"><link rel="prefetch" href="/assets/js/194.64523756.js"><link rel="prefetch" href="/assets/js/195.b61eddfb.js"><link rel="prefetch" href="/assets/js/196.b33280cc.js"><link rel="prefetch" href="/assets/js/197.1ab2b3c7.js"><link rel="prefetch" href="/assets/js/198.0fe96381.js"><link rel="prefetch" href="/assets/js/199.f1fa514a.js"><link rel="prefetch" href="/assets/js/20.9bdb2486.js"><link rel="prefetch" href="/assets/js/200.ffd35ce9.js"><link rel="prefetch" href="/assets/js/201.3c30eb53.js"><link rel="prefetch" href="/assets/js/202.4c17a550.js"><link rel="prefetch" href="/assets/js/203.45421a6f.js"><link rel="prefetch" href="/assets/js/204.40be6120.js"><link rel="prefetch" href="/assets/js/205.5a0ba993.js"><link rel="prefetch" href="/assets/js/206.c7fb5a1f.js"><link rel="prefetch" href="/assets/js/207.d3a52b7f.js"><link rel="prefetch" href="/assets/js/208.d8eb6fce.js"><link rel="prefetch" href="/assets/js/209.708d165a.js"><link rel="prefetch" href="/assets/js/21.c90f33d7.js"><link rel="prefetch" href="/assets/js/210.4e9e94e3.js"><link rel="prefetch" href="/assets/js/211.a657351a.js"><link rel="prefetch" href="/assets/js/212.c2db4334.js"><link rel="prefetch" href="/assets/js/213.304b9497.js"><link rel="prefetch" href="/assets/js/214.fe9920a3.js"><link rel="prefetch" href="/assets/js/215.96a4497f.js"><link rel="prefetch" href="/assets/js/216.3e009de9.js"><link rel="prefetch" href="/assets/js/217.b27c9d90.js"><link rel="prefetch" href="/assets/js/218.84093362.js"><link rel="prefetch" href="/assets/js/219.ff1353e7.js"><link rel="prefetch" href="/assets/js/22.3accf996.js"><link rel="prefetch" href="/assets/js/220.9aa0a3b3.js"><link rel="prefetch" href="/assets/js/221.463aa7cb.js"><link rel="prefetch" href="/assets/js/222.680edde1.js"><link rel="prefetch" href="/assets/js/223.c60896a1.js"><link rel="prefetch" href="/assets/js/224.8357099c.js"><link rel="prefetch" href="/assets/js/225.09db1be1.js"><link rel="prefetch" href="/assets/js/226.8864b8c3.js"><link rel="prefetch" href="/assets/js/227.60c28eae.js"><link rel="prefetch" href="/assets/js/228.a94c02f8.js"><link rel="prefetch" href="/assets/js/229.69f08434.js"><link rel="prefetch" href="/assets/js/23.bce95595.js"><link rel="prefetch" href="/assets/js/230.5bc3a942.js"><link rel="prefetch" href="/assets/js/231.237caa46.js"><link rel="prefetch" href="/assets/js/232.dae196ab.js"><link rel="prefetch" href="/assets/js/233.772d0446.js"><link rel="prefetch" href="/assets/js/234.e5251f95.js"><link rel="prefetch" href="/assets/js/235.68ed9179.js"><link rel="prefetch" href="/assets/js/236.489405c3.js"><link rel="prefetch" href="/assets/js/237.2609b369.js"><link rel="prefetch" href="/assets/js/238.00846771.js"><link rel="prefetch" href="/assets/js/239.21ec89c5.js"><link rel="prefetch" href="/assets/js/24.d99ae084.js"><link rel="prefetch" href="/assets/js/240.33c780fc.js"><link rel="prefetch" href="/assets/js/241.c5fbfd92.js"><link rel="prefetch" href="/assets/js/242.4ea4e5eb.js"><link rel="prefetch" href="/assets/js/243.c6518b1b.js"><link rel="prefetch" href="/assets/js/244.6cafa521.js"><link rel="prefetch" href="/assets/js/245.71328724.js"><link rel="prefetch" href="/assets/js/246.ba50479b.js"><link rel="prefetch" href="/assets/js/247.1ae4b4e4.js"><link rel="prefetch" href="/assets/js/248.2bf11d95.js"><link rel="prefetch" href="/assets/js/249.9979c43c.js"><link rel="prefetch" href="/assets/js/25.f9d584fe.js"><link rel="prefetch" href="/assets/js/250.76e97f00.js"><link rel="prefetch" href="/assets/js/251.226d5c44.js"><link rel="prefetch" href="/assets/js/252.cb33bc36.js"><link rel="prefetch" href="/assets/js/253.77524164.js"><link rel="prefetch" href="/assets/js/254.7a6ceecb.js"><link rel="prefetch" href="/assets/js/255.2a209aeb.js"><link rel="prefetch" href="/assets/js/256.75086add.js"><link rel="prefetch" href="/assets/js/257.a1ce9d72.js"><link rel="prefetch" href="/assets/js/258.70ca5acd.js"><link rel="prefetch" href="/assets/js/259.540f25d7.js"><link rel="prefetch" href="/assets/js/26.fba140b5.js"><link rel="prefetch" href="/assets/js/260.f00c36ca.js"><link rel="prefetch" href="/assets/js/261.11e9d046.js"><link rel="prefetch" href="/assets/js/262.5f7684f4.js"><link rel="prefetch" href="/assets/js/263.66bda648.js"><link rel="prefetch" href="/assets/js/264.af49db99.js"><link rel="prefetch" href="/assets/js/265.dcfcf504.js"><link rel="prefetch" href="/assets/js/266.0ff2f9b9.js"><link rel="prefetch" href="/assets/js/267.279965d2.js"><link rel="prefetch" href="/assets/js/268.f70f6b44.js"><link rel="prefetch" href="/assets/js/269.473abf6e.js"><link rel="prefetch" href="/assets/js/27.0249ab9c.js"><link rel="prefetch" href="/assets/js/270.6caa93fa.js"><link rel="prefetch" href="/assets/js/271.c2bc82e9.js"><link rel="prefetch" href="/assets/js/272.50115885.js"><link rel="prefetch" href="/assets/js/273.d56fdf7a.js"><link rel="prefetch" href="/assets/js/274.1f01ec24.js"><link rel="prefetch" href="/assets/js/275.3ec11a6d.js"><link rel="prefetch" href="/assets/js/276.bb77cf7a.js"><link rel="prefetch" href="/assets/js/277.90223a51.js"><link rel="prefetch" href="/assets/js/278.a84b198d.js"><link rel="prefetch" href="/assets/js/279.36e6f751.js"><link rel="prefetch" href="/assets/js/28.502a4713.js"><link rel="prefetch" href="/assets/js/280.35c6ca13.js"><link rel="prefetch" href="/assets/js/281.6a0fe5ac.js"><link rel="prefetch" href="/assets/js/282.8d9c5b28.js"><link rel="prefetch" href="/assets/js/283.9f306ae1.js"><link rel="prefetch" href="/assets/js/284.169d383a.js"><link rel="prefetch" href="/assets/js/285.6399c745.js"><link rel="prefetch" href="/assets/js/286.e3fd8b5b.js"><link rel="prefetch" href="/assets/js/287.bbb75c43.js"><link rel="prefetch" href="/assets/js/288.5b7672da.js"><link rel="prefetch" href="/assets/js/289.7cb5158d.js"><link rel="prefetch" href="/assets/js/29.1b108016.js"><link rel="prefetch" href="/assets/js/290.6fdc61b9.js"><link rel="prefetch" href="/assets/js/291.bb1fd8ca.js"><link rel="prefetch" href="/assets/js/292.29ca0f39.js"><link rel="prefetch" href="/assets/js/293.5824e83c.js"><link rel="prefetch" href="/assets/js/294.4874cb54.js"><link rel="prefetch" href="/assets/js/295.40bcbcd7.js"><link rel="prefetch" href="/assets/js/296.25668e00.js"><link rel="prefetch" href="/assets/js/297.e617a64f.js"><link rel="prefetch" href="/assets/js/298.44d30f5b.js"><link rel="prefetch" href="/assets/js/299.9a6e6a78.js"><link rel="prefetch" href="/assets/js/30.d46382c7.js"><link rel="prefetch" href="/assets/js/300.78d820b7.js"><link rel="prefetch" href="/assets/js/301.9bd3a5b3.js"><link rel="prefetch" href="/assets/js/302.f48b61a8.js"><link rel="prefetch" href="/assets/js/303.b20486b1.js"><link rel="prefetch" href="/assets/js/304.e72f2e23.js"><link rel="prefetch" href="/assets/js/305.d09a95ba.js"><link rel="prefetch" href="/assets/js/306.5ae15996.js"><link rel="prefetch" href="/assets/js/307.9ddf5f9d.js"><link rel="prefetch" href="/assets/js/308.55936bcd.js"><link rel="prefetch" href="/assets/js/309.26d4c2f8.js"><link rel="prefetch" href="/assets/js/31.353cd0da.js"><link rel="prefetch" href="/assets/js/310.85cea313.js"><link rel="prefetch" href="/assets/js/311.ed826671.js"><link rel="prefetch" href="/assets/js/312.a5eeea9d.js"><link rel="prefetch" href="/assets/js/313.45569147.js"><link rel="prefetch" href="/assets/js/314.cb57bc8f.js"><link rel="prefetch" href="/assets/js/315.ef2f1e1c.js"><link rel="prefetch" href="/assets/js/316.d5033ec6.js"><link rel="prefetch" href="/assets/js/317.655863d0.js"><link rel="prefetch" href="/assets/js/318.19068beb.js"><link rel="prefetch" href="/assets/js/319.ac55458d.js"><link rel="prefetch" href="/assets/js/32.d905c2cd.js"><link rel="prefetch" href="/assets/js/320.0680b555.js"><link rel="prefetch" href="/assets/js/321.24f393a7.js"><link rel="prefetch" href="/assets/js/322.62e45bf2.js"><link rel="prefetch" href="/assets/js/323.eb92a31f.js"><link rel="prefetch" href="/assets/js/324.433566fb.js"><link rel="prefetch" href="/assets/js/325.9c71368e.js"><link rel="prefetch" href="/assets/js/326.1705b8d6.js"><link rel="prefetch" href="/assets/js/327.0e88285e.js"><link rel="prefetch" href="/assets/js/328.389999b1.js"><link rel="prefetch" href="/assets/js/329.928a7f77.js"><link rel="prefetch" href="/assets/js/33.9359e14d.js"><link rel="prefetch" href="/assets/js/330.4d907148.js"><link rel="prefetch" href="/assets/js/331.bcb5da6c.js"><link rel="prefetch" href="/assets/js/332.0be8fc4a.js"><link rel="prefetch" href="/assets/js/333.3e0c7740.js"><link rel="prefetch" href="/assets/js/334.5c356a1a.js"><link rel="prefetch" href="/assets/js/335.a3c5de43.js"><link rel="prefetch" href="/assets/js/336.b0425564.js"><link rel="prefetch" href="/assets/js/337.f446283e.js"><link rel="prefetch" href="/assets/js/338.a71acf10.js"><link rel="prefetch" href="/assets/js/339.051dadf7.js"><link rel="prefetch" href="/assets/js/34.fec188a0.js"><link rel="prefetch" href="/assets/js/340.26cd4411.js"><link rel="prefetch" href="/assets/js/341.0db67efe.js"><link rel="prefetch" href="/assets/js/342.0b2a481b.js"><link rel="prefetch" href="/assets/js/343.fffa6cdc.js"><link rel="prefetch" href="/assets/js/344.8f675a82.js"><link rel="prefetch" href="/assets/js/345.423e7476.js"><link rel="prefetch" href="/assets/js/346.016adf15.js"><link rel="prefetch" href="/assets/js/347.5abc29de.js"><link rel="prefetch" href="/assets/js/348.e0ce11c2.js"><link rel="prefetch" href="/assets/js/349.83074ff6.js"><link rel="prefetch" href="/assets/js/35.135cd75d.js"><link rel="prefetch" href="/assets/js/350.fc167b3a.js"><link rel="prefetch" href="/assets/js/351.2ccd664b.js"><link rel="prefetch" href="/assets/js/352.21185cb1.js"><link rel="prefetch" href="/assets/js/353.668c542e.js"><link rel="prefetch" href="/assets/js/354.440e4cd2.js"><link rel="prefetch" href="/assets/js/355.014ea98b.js"><link rel="prefetch" href="/assets/js/356.73c97607.js"><link rel="prefetch" href="/assets/js/357.aa0cdf5a.js"><link rel="prefetch" href="/assets/js/358.0c8c912e.js"><link rel="prefetch" href="/assets/js/359.aeb81810.js"><link rel="prefetch" href="/assets/js/36.1b76e309.js"><link rel="prefetch" href="/assets/js/360.6d8bdb5a.js"><link rel="prefetch" href="/assets/js/361.21404a8e.js"><link rel="prefetch" href="/assets/js/362.ded22ed8.js"><link rel="prefetch" href="/assets/js/363.3eee7be1.js"><link rel="prefetch" href="/assets/js/364.71008118.js"><link rel="prefetch" href="/assets/js/365.02f5b601.js"><link rel="prefetch" href="/assets/js/366.e46f861c.js"><link rel="prefetch" href="/assets/js/367.134d2beb.js"><link rel="prefetch" href="/assets/js/368.b92f91e9.js"><link rel="prefetch" href="/assets/js/369.c292fc98.js"><link rel="prefetch" href="/assets/js/37.a06e01b7.js"><link rel="prefetch" href="/assets/js/370.f6a650ce.js"><link rel="prefetch" href="/assets/js/371.e4807eb2.js"><link rel="prefetch" href="/assets/js/372.0b1fe4c5.js"><link rel="prefetch" href="/assets/js/373.0fc07e60.js"><link rel="prefetch" href="/assets/js/374.d44d8c4f.js"><link rel="prefetch" href="/assets/js/375.a5330ceb.js"><link rel="prefetch" href="/assets/js/376.01aad48c.js"><link rel="prefetch" href="/assets/js/377.8e4f2a9c.js"><link rel="prefetch" href="/assets/js/378.fc5a69bc.js"><link rel="prefetch" href="/assets/js/379.9483a402.js"><link rel="prefetch" href="/assets/js/38.9642b95b.js"><link rel="prefetch" href="/assets/js/380.114eef33.js"><link rel="prefetch" href="/assets/js/381.31343487.js"><link rel="prefetch" href="/assets/js/382.7fcaa731.js"><link rel="prefetch" href="/assets/js/383.ad2de414.js"><link rel="prefetch" href="/assets/js/384.4fa5bdd7.js"><link rel="prefetch" href="/assets/js/385.e9ba9691.js"><link rel="prefetch" href="/assets/js/386.026f90f6.js"><link rel="prefetch" href="/assets/js/387.f3b23843.js"><link rel="prefetch" href="/assets/js/388.10de0194.js"><link rel="prefetch" href="/assets/js/389.16d99ea9.js"><link rel="prefetch" href="/assets/js/39.18777c77.js"><link rel="prefetch" href="/assets/js/390.4099cf94.js"><link rel="prefetch" href="/assets/js/391.46d1e659.js"><link rel="prefetch" href="/assets/js/392.468f6e9e.js"><link rel="prefetch" href="/assets/js/393.435ec877.js"><link rel="prefetch" href="/assets/js/394.b56f2561.js"><link rel="prefetch" href="/assets/js/395.e8a04bd0.js"><link rel="prefetch" href="/assets/js/396.147c416e.js"><link rel="prefetch" href="/assets/js/397.0e54a534.js"><link rel="prefetch" href="/assets/js/398.b0c017bd.js"><link rel="prefetch" href="/assets/js/399.3b72a52a.js"><link rel="prefetch" href="/assets/js/40.f10ebd42.js"><link rel="prefetch" href="/assets/js/400.be59c086.js"><link rel="prefetch" href="/assets/js/401.2da8dbb1.js"><link rel="prefetch" href="/assets/js/402.d392df88.js"><link rel="prefetch" href="/assets/js/403.7c1c384a.js"><link rel="prefetch" href="/assets/js/404.19ae9aad.js"><link rel="prefetch" href="/assets/js/405.1972c0ba.js"><link rel="prefetch" href="/assets/js/406.e55976b0.js"><link rel="prefetch" href="/assets/js/407.59b196cf.js"><link rel="prefetch" href="/assets/js/408.1c6c30e3.js"><link rel="prefetch" href="/assets/js/409.7b6218eb.js"><link rel="prefetch" href="/assets/js/41.b419af46.js"><link rel="prefetch" href="/assets/js/410.2066ca30.js"><link rel="prefetch" href="/assets/js/411.16c85132.js"><link rel="prefetch" href="/assets/js/412.8ed49d3c.js"><link rel="prefetch" href="/assets/js/413.40cd3861.js"><link rel="prefetch" href="/assets/js/414.6d27638c.js"><link rel="prefetch" href="/assets/js/415.14fc51f4.js"><link rel="prefetch" href="/assets/js/416.3ccc9763.js"><link rel="prefetch" href="/assets/js/417.1acd33fa.js"><link rel="prefetch" href="/assets/js/418.1ef4869d.js"><link rel="prefetch" href="/assets/js/419.e8465207.js"><link rel="prefetch" href="/assets/js/42.bc2cc534.js"><link rel="prefetch" href="/assets/js/420.9cae3299.js"><link rel="prefetch" href="/assets/js/421.2115c3e3.js"><link rel="prefetch" href="/assets/js/422.b21ab3df.js"><link rel="prefetch" href="/assets/js/423.b157df58.js"><link rel="prefetch" href="/assets/js/424.25efc196.js"><link rel="prefetch" href="/assets/js/425.a6fdc0df.js"><link rel="prefetch" href="/assets/js/426.e4eb7dff.js"><link rel="prefetch" href="/assets/js/427.d7aaf353.js"><link rel="prefetch" href="/assets/js/428.03637792.js"><link rel="prefetch" href="/assets/js/429.49a1e788.js"><link rel="prefetch" href="/assets/js/43.4193f196.js"><link rel="prefetch" href="/assets/js/430.92587985.js"><link rel="prefetch" href="/assets/js/431.4a106e22.js"><link rel="prefetch" href="/assets/js/432.8543f043.js"><link rel="prefetch" href="/assets/js/433.48b09dd8.js"><link rel="prefetch" href="/assets/js/434.7fa7fe42.js"><link rel="prefetch" href="/assets/js/435.2ee57bda.js"><link rel="prefetch" href="/assets/js/436.f72e1d1a.js"><link rel="prefetch" href="/assets/js/437.4f19a14a.js"><link rel="prefetch" href="/assets/js/438.eaf0c451.js"><link rel="prefetch" href="/assets/js/439.21f6ca4c.js"><link rel="prefetch" href="/assets/js/44.0e2c101c.js"><link rel="prefetch" href="/assets/js/440.56c67d57.js"><link rel="prefetch" href="/assets/js/441.5d24714d.js"><link rel="prefetch" href="/assets/js/442.783103bf.js"><link rel="prefetch" href="/assets/js/443.bbf1b5ae.js"><link rel="prefetch" href="/assets/js/444.8e1d5257.js"><link rel="prefetch" href="/assets/js/445.00c6e9c5.js"><link rel="prefetch" href="/assets/js/446.8c3cc4e1.js"><link rel="prefetch" href="/assets/js/447.31c8885c.js"><link rel="prefetch" href="/assets/js/448.9099b530.js"><link rel="prefetch" href="/assets/js/449.b5abefdf.js"><link rel="prefetch" href="/assets/js/45.906f0670.js"><link rel="prefetch" href="/assets/js/450.9c92e45e.js"><link rel="prefetch" href="/assets/js/451.88741426.js"><link rel="prefetch" href="/assets/js/452.38a4521b.js"><link rel="prefetch" href="/assets/js/453.86a38f65.js"><link rel="prefetch" href="/assets/js/454.d22aa1ba.js"><link rel="prefetch" href="/assets/js/455.d454ae8f.js"><link rel="prefetch" href="/assets/js/456.c4870b28.js"><link rel="prefetch" href="/assets/js/457.c3d08b73.js"><link rel="prefetch" href="/assets/js/458.92125bff.js"><link rel="prefetch" href="/assets/js/459.5bca562b.js"><link rel="prefetch" href="/assets/js/46.1d25bb03.js"><link rel="prefetch" href="/assets/js/460.9fca3734.js"><link rel="prefetch" href="/assets/js/461.21644dcc.js"><link rel="prefetch" href="/assets/js/462.0e33d6af.js"><link rel="prefetch" href="/assets/js/463.e68bf83c.js"><link rel="prefetch" href="/assets/js/464.44a1b93c.js"><link rel="prefetch" href="/assets/js/465.4920428c.js"><link rel="prefetch" href="/assets/js/466.953395e3.js"><link rel="prefetch" href="/assets/js/467.7d33be53.js"><link rel="prefetch" href="/assets/js/468.017df12e.js"><link rel="prefetch" href="/assets/js/469.379448f0.js"><link rel="prefetch" href="/assets/js/47.b4abc3a9.js"><link rel="prefetch" href="/assets/js/470.71e9afb9.js"><link rel="prefetch" href="/assets/js/471.c6dfc784.js"><link rel="prefetch" href="/assets/js/472.3aaa352a.js"><link rel="prefetch" href="/assets/js/473.e4ae4908.js"><link rel="prefetch" href="/assets/js/474.d444b477.js"><link rel="prefetch" href="/assets/js/475.05872843.js"><link rel="prefetch" href="/assets/js/476.50b81915.js"><link rel="prefetch" href="/assets/js/477.0eb808b6.js"><link rel="prefetch" href="/assets/js/478.f4aa5de1.js"><link rel="prefetch" href="/assets/js/479.1c5e0b82.js"><link rel="prefetch" href="/assets/js/48.d5735fb1.js"><link rel="prefetch" href="/assets/js/480.74f70b5d.js"><link rel="prefetch" href="/assets/js/481.79115014.js"><link rel="prefetch" href="/assets/js/482.61798924.js"><link rel="prefetch" href="/assets/js/483.6e5a5ba3.js"><link rel="prefetch" href="/assets/js/484.3e8eaadc.js"><link rel="prefetch" href="/assets/js/485.9f7473aa.js"><link rel="prefetch" href="/assets/js/486.f0553fe2.js"><link rel="prefetch" href="/assets/js/487.88b71ed0.js"><link rel="prefetch" href="/assets/js/488.14a8cc9b.js"><link rel="prefetch" href="/assets/js/489.0bdbd833.js"><link rel="prefetch" href="/assets/js/49.f041ca9b.js"><link rel="prefetch" href="/assets/js/490.2c7bccbb.js"><link rel="prefetch" href="/assets/js/491.f255141e.js"><link rel="prefetch" href="/assets/js/492.c8705eaa.js"><link rel="prefetch" href="/assets/js/493.3cf38aaa.js"><link rel="prefetch" href="/assets/js/494.d1292151.js"><link rel="prefetch" href="/assets/js/495.ba7335a2.js"><link rel="prefetch" href="/assets/js/496.ac307c80.js"><link rel="prefetch" href="/assets/js/497.fbcae06b.js"><link rel="prefetch" href="/assets/js/498.88b66080.js"><link rel="prefetch" href="/assets/js/499.76915c2b.js"><link rel="prefetch" href="/assets/js/5.eace4687.js"><link rel="prefetch" href="/assets/js/50.d5f95b25.js"><link rel="prefetch" href="/assets/js/500.765476c0.js"><link rel="prefetch" href="/assets/js/501.d60e2203.js"><link rel="prefetch" href="/assets/js/502.af38aa17.js"><link rel="prefetch" href="/assets/js/503.932b4181.js"><link rel="prefetch" href="/assets/js/504.f5a4701e.js"><link rel="prefetch" href="/assets/js/505.f52db0e7.js"><link rel="prefetch" href="/assets/js/506.6a3c9744.js"><link rel="prefetch" href="/assets/js/507.f55b2a60.js"><link rel="prefetch" href="/assets/js/508.c56d4785.js"><link rel="prefetch" href="/assets/js/509.421c93f9.js"><link rel="prefetch" href="/assets/js/51.c90266fb.js"><link rel="prefetch" href="/assets/js/510.4e30f15a.js"><link rel="prefetch" href="/assets/js/511.632b52c7.js"><link rel="prefetch" href="/assets/js/512.d1e7d4e6.js"><link rel="prefetch" href="/assets/js/513.e0d72a15.js"><link rel="prefetch" href="/assets/js/514.24f6a27b.js"><link rel="prefetch" href="/assets/js/515.f6b31350.js"><link rel="prefetch" href="/assets/js/516.3e137eba.js"><link rel="prefetch" href="/assets/js/517.f29a8ed4.js"><link rel="prefetch" href="/assets/js/518.41cb15ad.js"><link rel="prefetch" href="/assets/js/519.af730a32.js"><link rel="prefetch" href="/assets/js/52.0052906b.js"><link rel="prefetch" href="/assets/js/520.7c4f9243.js"><link rel="prefetch" href="/assets/js/521.fea0cd1f.js"><link rel="prefetch" href="/assets/js/522.dd724362.js"><link rel="prefetch" href="/assets/js/523.f91a7daf.js"><link rel="prefetch" href="/assets/js/524.1cdf7aba.js"><link rel="prefetch" href="/assets/js/525.a1b4e9ad.js"><link rel="prefetch" href="/assets/js/526.000e8c78.js"><link rel="prefetch" href="/assets/js/527.4c44a8e3.js"><link rel="prefetch" href="/assets/js/528.31cf67d3.js"><link rel="prefetch" href="/assets/js/529.11b07638.js"><link rel="prefetch" href="/assets/js/53.cdd2a0f7.js"><link rel="prefetch" href="/assets/js/530.23cdf518.js"><link rel="prefetch" href="/assets/js/531.3879ca7d.js"><link rel="prefetch" href="/assets/js/532.85cac22c.js"><link rel="prefetch" href="/assets/js/533.94c44298.js"><link rel="prefetch" href="/assets/js/534.e1efd7b4.js"><link rel="prefetch" href="/assets/js/535.2dffb600.js"><link rel="prefetch" href="/assets/js/536.ab642aa5.js"><link rel="prefetch" href="/assets/js/537.6b9d4947.js"><link rel="prefetch" href="/assets/js/538.03a11f03.js"><link rel="prefetch" href="/assets/js/539.4c952df7.js"><link rel="prefetch" href="/assets/js/54.8b0e4ada.js"><link rel="prefetch" href="/assets/js/540.13d23332.js"><link rel="prefetch" href="/assets/js/541.26284e92.js"><link rel="prefetch" href="/assets/js/542.fd08ed8a.js"><link rel="prefetch" href="/assets/js/543.075b0065.js"><link rel="prefetch" href="/assets/js/544.0a027c97.js"><link rel="prefetch" href="/assets/js/545.d1474245.js"><link rel="prefetch" href="/assets/js/546.ce76bf26.js"><link rel="prefetch" href="/assets/js/547.0a810c96.js"><link rel="prefetch" href="/assets/js/548.801a1ae8.js"><link rel="prefetch" href="/assets/js/549.bf491a2a.js"><link rel="prefetch" href="/assets/js/55.9907a531.js"><link rel="prefetch" href="/assets/js/550.cbd77925.js"><link rel="prefetch" href="/assets/js/551.e8c665c4.js"><link rel="prefetch" href="/assets/js/552.d5863af0.js"><link rel="prefetch" href="/assets/js/553.f2fe6682.js"><link rel="prefetch" href="/assets/js/554.1d5af280.js"><link rel="prefetch" href="/assets/js/555.582d5d16.js"><link rel="prefetch" href="/assets/js/556.85788768.js"><link rel="prefetch" href="/assets/js/557.c1ad3a51.js"><link rel="prefetch" href="/assets/js/558.c93e88fc.js"><link rel="prefetch" href="/assets/js/559.fa78b9da.js"><link rel="prefetch" href="/assets/js/56.3972fd13.js"><link rel="prefetch" href="/assets/js/560.9f3f34b9.js"><link rel="prefetch" href="/assets/js/561.a9d55914.js"><link rel="prefetch" href="/assets/js/562.29c6f43e.js"><link rel="prefetch" href="/assets/js/563.2c532df6.js"><link rel="prefetch" href="/assets/js/564.4070c349.js"><link rel="prefetch" href="/assets/js/565.4baf3784.js"><link rel="prefetch" href="/assets/js/566.42048083.js"><link rel="prefetch" href="/assets/js/567.6abeef0e.js"><link rel="prefetch" href="/assets/js/568.52e9a512.js"><link rel="prefetch" href="/assets/js/569.2a1c1198.js"><link rel="prefetch" href="/assets/js/57.c4bbdc48.js"><link rel="prefetch" href="/assets/js/570.a4f462f7.js"><link rel="prefetch" href="/assets/js/571.32730b85.js"><link rel="prefetch" href="/assets/js/572.304925e6.js"><link rel="prefetch" href="/assets/js/573.8ce8ebd3.js"><link rel="prefetch" href="/assets/js/574.893da868.js"><link rel="prefetch" href="/assets/js/575.e72955dc.js"><link rel="prefetch" href="/assets/js/576.9e012e00.js"><link rel="prefetch" href="/assets/js/577.d8af6d80.js"><link rel="prefetch" href="/assets/js/578.26b83fe1.js"><link rel="prefetch" href="/assets/js/579.0ea09671.js"><link rel="prefetch" href="/assets/js/58.e5669615.js"><link rel="prefetch" href="/assets/js/580.92fe818d.js"><link rel="prefetch" href="/assets/js/581.e67ec943.js"><link rel="prefetch" href="/assets/js/582.ab9d6c92.js"><link rel="prefetch" href="/assets/js/583.a34483d9.js"><link rel="prefetch" href="/assets/js/584.f8a73a38.js"><link rel="prefetch" href="/assets/js/585.491eb48b.js"><link rel="prefetch" href="/assets/js/586.1e318806.js"><link rel="prefetch" href="/assets/js/587.8b37e4f7.js"><link rel="prefetch" href="/assets/js/588.d2bda385.js"><link rel="prefetch" href="/assets/js/589.1073b41f.js"><link rel="prefetch" href="/assets/js/59.034e4c7c.js"><link rel="prefetch" href="/assets/js/590.8fe66dec.js"><link rel="prefetch" href="/assets/js/591.7d0036b3.js"><link rel="prefetch" href="/assets/js/592.80bc3995.js"><link rel="prefetch" href="/assets/js/593.7e44de51.js"><link rel="prefetch" href="/assets/js/594.a1a833a7.js"><link rel="prefetch" href="/assets/js/595.c1a116a4.js"><link rel="prefetch" href="/assets/js/596.95fd4619.js"><link rel="prefetch" href="/assets/js/597.45c906e6.js"><link rel="prefetch" href="/assets/js/598.1c569340.js"><link rel="prefetch" href="/assets/js/599.d4ae53f9.js"><link rel="prefetch" href="/assets/js/6.008dd0d6.js"><link rel="prefetch" href="/assets/js/60.c73375e5.js"><link rel="prefetch" href="/assets/js/600.bc9e40b6.js"><link rel="prefetch" href="/assets/js/601.229a51dd.js"><link rel="prefetch" href="/assets/js/602.1a865f27.js"><link rel="prefetch" href="/assets/js/603.7e7b7de1.js"><link rel="prefetch" href="/assets/js/604.7dec1673.js"><link rel="prefetch" href="/assets/js/606.f29ff83e.js"><link rel="prefetch" href="/assets/js/607.f373dc6f.js"><link rel="prefetch" href="/assets/js/608.374f5c91.js"><link rel="prefetch" href="/assets/js/609.d644e9f4.js"><link rel="prefetch" href="/assets/js/61.101494e3.js"><link rel="prefetch" href="/assets/js/610.619172db.js"><link rel="prefetch" href="/assets/js/611.3d810cc3.js"><link rel="prefetch" href="/assets/js/612.ff74239e.js"><link rel="prefetch" href="/assets/js/613.b1cfbf9c.js"><link rel="prefetch" href="/assets/js/614.f243cd21.js"><link rel="prefetch" href="/assets/js/615.4c9e19f6.js"><link rel="prefetch" href="/assets/js/616.6fbf2d17.js"><link rel="prefetch" href="/assets/js/617.3e64c225.js"><link rel="prefetch" href="/assets/js/618.e1e77dbc.js"><link rel="prefetch" href="/assets/js/619.989a61dd.js"><link rel="prefetch" href="/assets/js/62.309d2360.js"><link rel="prefetch" href="/assets/js/620.1423fb8f.js"><link rel="prefetch" href="/assets/js/621.c821654f.js"><link rel="prefetch" href="/assets/js/622.a629d54d.js"><link rel="prefetch" href="/assets/js/623.3c371fca.js"><link rel="prefetch" href="/assets/js/624.4683c342.js"><link rel="prefetch" href="/assets/js/625.bdd9777b.js"><link rel="prefetch" href="/assets/js/626.6821148e.js"><link rel="prefetch" href="/assets/js/627.34801d3a.js"><link rel="prefetch" href="/assets/js/628.c0449462.js"><link rel="prefetch" href="/assets/js/629.ff8d8723.js"><link rel="prefetch" href="/assets/js/63.feea9c52.js"><link rel="prefetch" href="/assets/js/630.5694d1dd.js"><link rel="prefetch" href="/assets/js/631.5082657a.js"><link rel="prefetch" href="/assets/js/632.5ddc2fa3.js"><link rel="prefetch" href="/assets/js/633.5cfd40ff.js"><link rel="prefetch" href="/assets/js/634.aaed16d3.js"><link rel="prefetch" href="/assets/js/635.d0c7211b.js"><link rel="prefetch" href="/assets/js/636.b90f914c.js"><link rel="prefetch" href="/assets/js/637.89c0cf27.js"><link rel="prefetch" href="/assets/js/638.b21042d0.js"><link rel="prefetch" href="/assets/js/639.2469f290.js"><link rel="prefetch" href="/assets/js/64.f6db9f0b.js"><link rel="prefetch" href="/assets/js/640.9e1a8e08.js"><link rel="prefetch" href="/assets/js/641.f15ab255.js"><link rel="prefetch" href="/assets/js/642.bfc89229.js"><link rel="prefetch" href="/assets/js/643.9c468250.js"><link rel="prefetch" href="/assets/js/644.bbe9e2da.js"><link rel="prefetch" href="/assets/js/645.23d9d725.js"><link rel="prefetch" href="/assets/js/646.b081e466.js"><link rel="prefetch" href="/assets/js/647.6ced6a8a.js"><link rel="prefetch" href="/assets/js/648.91bad95d.js"><link rel="prefetch" href="/assets/js/649.611812d7.js"><link rel="prefetch" href="/assets/js/65.922b6b35.js"><link rel="prefetch" href="/assets/js/66.c8acd9ff.js"><link rel="prefetch" href="/assets/js/67.ef6cda27.js"><link rel="prefetch" href="/assets/js/68.4338a08c.js"><link rel="prefetch" href="/assets/js/69.3c99b115.js"><link rel="prefetch" href="/assets/js/7.080f75db.js"><link rel="prefetch" href="/assets/js/70.b40c143e.js"><link rel="prefetch" href="/assets/js/71.8dda371c.js"><link rel="prefetch" href="/assets/js/72.2447f019.js"><link rel="prefetch" href="/assets/js/73.6474ed0d.js"><link rel="prefetch" href="/assets/js/74.9972994d.js"><link rel="prefetch" href="/assets/js/75.2bf3c22f.js"><link rel="prefetch" href="/assets/js/76.dc7a335f.js"><link rel="prefetch" href="/assets/js/77.fa84f1b3.js"><link rel="prefetch" href="/assets/js/78.cdbdfe94.js"><link rel="prefetch" href="/assets/js/79.7d2b1b81.js"><link rel="prefetch" href="/assets/js/8.d214e90e.js"><link rel="prefetch" href="/assets/js/80.a2b962e5.js"><link rel="prefetch" href="/assets/js/81.4f37ae33.js"><link rel="prefetch" href="/assets/js/82.3b68aafa.js"><link rel="prefetch" href="/assets/js/83.583d9f67.js"><link rel="prefetch" href="/assets/js/84.3dd19c62.js"><link rel="prefetch" href="/assets/js/85.fed4020f.js"><link rel="prefetch" href="/assets/js/86.a89f326b.js"><link rel="prefetch" href="/assets/js/87.cd98a29e.js"><link rel="prefetch" href="/assets/js/88.abdac00b.js"><link rel="prefetch" href="/assets/js/89.f9a60eff.js"><link rel="prefetch" href="/assets/js/9.15e59c54.js"><link rel="prefetch" href="/assets/js/90.7f4a86e1.js"><link rel="prefetch" href="/assets/js/91.6ec5a271.js"><link rel="prefetch" href="/assets/js/92.add5e92b.js"><link rel="prefetch" href="/assets/js/93.16ec2f5d.js"><link rel="prefetch" href="/assets/js/94.76df3d9f.js"><link rel="prefetch" href="/assets/js/95.625b5eb6.js"><link rel="prefetch" href="/assets/js/96.d6ddcb89.js"><link rel="prefetch" href="/assets/js/97.33b0cc3c.js"><link rel="prefetch" href="/assets/js/98.7200f506.js"><link rel="prefetch" href="/assets/js/99.67a37d19.js"><link rel="prefetch" href="/assets/js/vendors~docsearch.1288603f.js">
     <link rel="stylesheet" href="/assets/css/0.styles.f7fca28c.css">
   </head>
   <body>
     <div id="app" data-server-rendered="true"><div class="theme-container"><header class="navbar"><div class="sidebar-button"><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" role="img" viewBox="0 0 448 512" class="icon"><path fill="currentColor" d="M436 124H12c-6.627 0-12-5.373-12-12V80c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12zm0 160H12c-6.627 0-12-5.373-12-12v-32c0-6.627 5.373-12 12-12h424c6.627 0 12 5.373 12 12v32c0 6.627-5.373 12-12 12z"></path></svg></div> <a href="/zh/" class="home-link router-link-active"><img src="/img/logo.png" alt=" " class="logo"></a> <div class="links"><div class="search-box"><input aria-label="Search" autocomplete="off" spellcheck="false" value=""> <!----></div> <nav class="nav-links can-hide"><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">文档</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/UserGuide/Master/QuickStart/QuickStart.html" class="nav-link">In progress</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.12.x/QuickStart/QuickStart.html" class="nav-link">V0.12.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.11.x/Get Started/QuickStart.html" class="nav-link">V0.11.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.10.x/Get Started/QuickStart.html" class="nav-link">V0.10.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.9.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.9.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.8.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.8.x</a></li></ul></div></div><div class="nav-item"><a href="/zh/SystemDesign/Architecture/Architecture.html" class="nav-link">系统设计</a></div><div class="nav-item"><a href="/zh/Download/" class="nav-link">下载</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">社区</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="https://cwiki.apache.org/confluence/display/iotdb" class="nav-link external">
   Wiki
   <!----></a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Project Committers.html" class="nav-link">开发人员</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Powered By.html" class="nav-link">技术支持</a></li><li class="dropdown-item"><!----> <a href="/Community/Materials.html" class="nav-link">活动与报告</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Feedback.html" class="nav-link">交流与反馈</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">开发</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/Development/VoteRelease.html" class="nav-link">如何投票</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/HowToCommit.html" class="nav-link">如何提交代码</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/Committer.html" class="nav-link">成为Committer</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/ContributeGuide.html" class="nav-link">项目开发指南</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/format-changelist.html" class="nav-link">TsFile的更改列表</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/rpc-changelist.html" class="nav-link">RPC变更清单</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">ASF</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="http://www.apache.org/" class="nav-link external">
   基金会
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/licenses/" class="nav-link external">
   许可证
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/security/" class="nav-link external">
   安全
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/sponsorship.html" class="nav-link external">
   赞助
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/thanks.html" class="nav-link external">
   致谢
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/events/current-event" class="nav-link external">
   活动
   <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">语言</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/V0.8.x/7-TsFile/2-Usage.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.8.x/7-TsFile/2-Usage.html" aria-current="page" class="nav-link router-link-exact-active router-link-active">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link">
     gitHub
     <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav></div></header> <div class="sidebar-mask"></div> <aside class="sidebar"><nav class="nav-links"><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">文档</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/UserGuide/Master/QuickStart/QuickStart.html" class="nav-link">In progress</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.12.x/QuickStart/QuickStart.html" class="nav-link">V0.12.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.11.x/Get Started/QuickStart.html" class="nav-link">V0.11.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.10.x/Get Started/QuickStart.html" class="nav-link">V0.10.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.9.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.9.x</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.8.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.8.x</a></li></ul></div></div><div class="nav-item"><a href="/zh/SystemDesign/Architecture/Architecture.html" class="nav-link">系统设计</a></div><div class="nav-item"><a href="/zh/Download/" class="nav-link">下载</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">社区</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="https://cwiki.apache.org/confluence/display/iotdb" class="nav-link external">
   Wiki
   <!----></a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Project Committers.html" class="nav-link">开发人员</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Community-Powered By.html" class="nav-link">技术支持</a></li><li class="dropdown-item"><!----> <a href="/Community/Materials.html" class="nav-link">活动与报告</a></li><li class="dropdown-item"><!----> <a href="/zh/Community/Feedback.html" class="nav-link">交流与反馈</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">开发</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/zh/Development/VoteRelease.html" class="nav-link">如何投票</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/HowToCommit.html" class="nav-link">如何提交代码</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/Committer.html" class="nav-link">成为Committer</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/ContributeGuide.html" class="nav-link">项目开发指南</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/format-changelist.html" class="nav-link">TsFile的更改列表</a></li><li class="dropdown-item"><!----> <a href="/zh/Development/rpc-changelist.html" class="nav-link">RPC变更清单</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">ASF</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="http://www.apache.org/" class="nav-link external">
   基金会
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/licenses/" class="nav-link external">
   许可证
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/security/" class="nav-link external">
   安全
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/sponsorship.html" class="nav-link external">
   赞助
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/thanks.html" class="nav-link external">
   致谢
   <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/events/current-event" class="nav-link external">
   活动
   <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">语言</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/V0.8.x/7-TsFile/2-Usage.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.8.x/7-TsFile/2-Usage.html" aria-current="page" class="nav-link router-link-exact-active router-link-active">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link">
     gitHub
     <span><svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" focusable="false" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg> <span class="sr-only">(opens new window)</span></span></a></nav>  <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB用户手册 (V0.8.x)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>0-开始使用</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>1-概述</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>2-基本概念</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>3-操作指南</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>4-系统部署与管理</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>5-IoTDB SQL文档</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>6-JDBC API</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>7-TsFile</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/zh/UserGuide/V0.8.x/7-TsFile/1-Installation.html" class="sidebar-link">安装</a></li><li><a href="/zh/UserGuide/V0.8.x/7-TsFile/2-Usage.html" aria-current="page" class="active sidebar-link">用法</a></li><li><a href="/zh/UserGuide/V0.8.x/7-TsFile/3-Hierarchy.html" class="sidebar-link">TsFile层次结构</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>8-系统工具</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="用法"><a href="#用法" class="header-anchor">#</a> 用法</h1> <p>现在，您准备开始使用TsFile做一些很棒的事情。 本节演示TsFile的详细用法。</p> <h2 id="时间序列数据"><a href="#时间序列数据" class="header-anchor">#</a> 时间序列数据</h2> <p>时间序列被视为四倍序列。 四元组定义为（设备，测量，时间，值）。</p> <ul><li><p><strong>测量</strong>: 时间序列进行的物理或形式测量，例如城市温度，某些商品的销售数量或火车在不同时间的速度。 由于传统的传感器（例如温度计）也需要进行一次测量并生成一个时间序列，因此我们将在下面互换使用测量和传感器。</p></li> <li><p><strong>设备</strong>: 设备是指正在执行多个测量（产生多个时间序列）的实体，例如，运行中的火车监视其速度，油表，行驶里程，当前乘客均被传送到一个时间序列。</p></li></ul> <p>表1说明了一组时间序列数据。 下表中显示的集合包含一个名为“ device_1”的设备以及三个名为“ sensor_1”，“ sensor_2”和“ sensor_3”的测量值。</p> <center><table style="text-align:center;"><tr><th colspan="6">device_1</th></tr> <tr><th colspan="2">sensor_1</th><th colspan="2">sensor_2</th><th colspan="2">sensor_3</th></tr> <tr><th>time</th><th>value</th><th>time</th><th>value</th><th>time</th><th>value</th></tr> <tr><td>1</td><td>1.2</td><td>1</td><td>20</td><td>2</td><td>50</td></tr> <tr><td>3</td><td>1.4</td><td>2</td><td>20</td><td>4</td><td>51</td></tr> <tr><td>5</td><td>1.1</td><td>3</td><td>21</td><td>6</td><td>52</td></tr> <tr><td>7</td><td>1.8</td><td>4</td><td>20</td><td>8</td><td>53</td></tr></table> <span>一组时间序列数据</span></center> <p><strong>一行数据</strong>: 在许多工业应用中，设备通常包含多个传感器，并且这些传感器可能在同一时间戳上具有值，这称为一行数据。</p> <p>形式上，一行数据由一个<code>device_id</code>，一个指示自1970年1月1日以来的毫秒数，00：00：00组成的时间戳，以及由<code>measurement_id</code>和对应的<code>value</code>组成的几对数据组成。 一行中的所有数据对都属于该<code>device_id</code>，并且具有相同的时间戳。 如果其中一个<code>measurements</code> 在<code>value</code> 中没有<code>value</code>，请改用空格（实际上，TsFile不存储空值）。 其格式如下所示：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>device_id, timestamp, &lt;measurement_id, value&gt;...
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>一个示例如下所示。 在此示例中，两个测量的数据类型分别为INT32和FLOAT。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>device_1, 1490860659000, m1, 10, m2, 12.12
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><h2 id="编写tsfile"><a href="#编写tsfile" class="header-anchor">#</a> 编写TsFile</h2> <h3 id="生成一个tsfile文件。"><a href="#生成一个tsfile文件。" class="header-anchor">#</a> 生成一个TsFile文件。</h3> <p>可以通过以下三个步骤来生成TsFile，完整的代码将在“编写TsFile的示例”部分中给出。</p> <ul><li><p>首先，构造一个<code>TsFileWriter</code>实例。</p> <p>以下是可用的构造函数：</p> <ul><li>没有预定义的架构</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>public TsFileWriter(File file) throws IOException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><ul><li>使用预定义的架构</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>public TsFileWriter(File file, FileSchema schema) throws IOException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>这是用于使用HDFS文件系统的。  <code>TsFileOutput</code>可以是<code>HDFSOutput</code>类的实例。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public TsFileWriter(TsFileOutput output, FileSchema schema) throws IOException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p><strong>参量:</strong></p> <ul><li><p>文件: 要写的TsFile</p></li> <li><p>模式: 文件模式将在下一部分中介绍。</p></li></ul></li> <li><p>二，添加测量</p> <p>或者，您可以先创建<code>FileSchema</code>类的实例，然后将其传递给<code>TsFileWriter</code>类的构造函数。</p> <p><code>FileSchema</code>类包含一个映射，该映射的键是一个测量模式的名称，而值是该模式本身。</p> <p>这里是接口：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>// 创建一个空的FileSchema或从现有的映射
 public FileSchema()
 public FileSchema(Map&lt;String, MeasurementSchema&gt; measurements)

 // 使用这两个界面添加测量
 public void registerMeasurement(MeasurementSchema descriptor)
 public void registerMeasurements(Map&lt;String, MeasurementSchema&gt; measurements)

 // 一些有用的吸气剂和检查剂
 public TSDataType getMeasurementDataType(String measurementId)
 public MeasurementSchema getMeasurementSchema(String measurementId)
 public Map&lt;String, MeasurementSchema&gt; getAllMeasurementSchema()
 public boolean hasMeasurement(String measurementId)
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br></div></div><p>您可以始终在<code>TsFileWriter</code>类中使用以下接口来添加其他度量：
 </p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public void addMeasurement(MeasurementSchema measurementSchema) throws WriteProcessException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p><code>MeasurementSchema</code>类包含一种度量的信息，有几种构造函数：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public MeasurementSchema(String measurementId, TSDataType type, TSEncoding encoding)

 public MeasurementSchema(String measurementId, TSDataType type, TSEncoding encoding, CompressionType compressionType)

 public MeasurementSchema(String measurementId, TSDataType type, TSEncoding encoding, CompressionType compressionType,
 Map&lt;String, String&gt; props)
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br></div></div><p><strong>参数：</strong></p> <ul><li><p>measurementID：此测量的名称，通常是传感器的名称。</p></li> <li><p>类型：数据类型，现在支持六种类型：<code>BOOLEAN</code>，<code>INT32</code>，<code>INT64</code>，<code>FLOAT</code>，<code>DOUBLE</code>，<code>TEXT</code>。</p></li> <li><p>encoding：数据编码。 看到 <a href="/zh/UserGuide/V0.8.x/2-Concept Key Concepts and Terminology/3-Encoding.html">章节 2-3</a>.</p></li> <li><p>compression：数据压缩。 现在支持<code>UNCOMPRESSED</code>和<code>SNAPPY</code>。</p></li> <li><p>props：特殊数据类型的属性，例如<code>FLOAT</code>和<code>DOUBLE</code>的<code>max_point_number</code>，<code>TEXT</code>的<code>max_string_length</code>。 用作字符串对，例如（“ max_point_number”，“ 3”）。</p></li></ul> <blockquote><p>**注意：**尽管一个度量名称可以在多个deltaObject中使用，但是不能更改属性。 即    不允许多次使用不同的类型或编码添加一个测量名称。
 这是一个不好的例子：</p></blockquote> <div class="language- extra-class"><pre><code>  // 测量值“ sensor_1”为浮点型
   addMeasurement(new MeasurementSchema(&quot;sensor_1&quot;, TSDataType.FLOAT, TSEncoding.RLE));

   // 此调用将引发WriteProcessException异常
   addMeasurement(new MeasurementSchema(&quot;sensor_1&quot;, TSDataType.INT32, TSEncoding.RLE));
 </code></pre></div></li> <li><p>第三，连续插入和写入数据。</p> <p>使用此接口可以创建新的<code>TSRecord</code>（时间戳和设备对）。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public TSRecord(long timestamp, String deviceId)
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>然后创建一个<code>DataPoint</code>（一个测量值和一个值对），并使用<code>addTuple</code>方法将<code>DataPoint</code>添加到正确的TsRecord。</p> <p>用这种方法写</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public void write(TSRecord record) throws IOException, WriteProcessException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div></li> <li><p>最后，调用<code>close</code>完成此编写过程。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public void close() throws IOException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div></li></ul> <h3 id="编写tsfile的示例"><a href="#编写tsfile的示例" class="header-anchor">#</a> 编写TsFile的示例</h3> <p>您应该将TsFile安装到本地Maven存储库。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>mvn clean install -pl tsfile -am -DskipTests
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>可以在以下位置找到更详尽的示例<code>/tsfile/example/src/main/java/org/apache/iotdb/tsfile/TsFileWrite.java</code></p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile</span><span class="token punctuation">;</span>

 <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span><span class="token class-name">File</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">TSDataType</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>file<span class="token punctuation">.</span>metadata<span class="token punctuation">.</span>enums<span class="token punctuation">.</span></span><span class="token class-name">TSEncoding</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>write<span class="token punctuation">.</span></span><span class="token class-name">TsFileWriter</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>write<span class="token punctuation">.</span>record<span class="token punctuation">.</span></span><span class="token class-name">TSRecord</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>write<span class="token punctuation">.</span>record<span class="token punctuation">.</span>datapoint<span class="token punctuation">.</span></span><span class="token class-name">DataPoint</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>write<span class="token punctuation">.</span>record<span class="token punctuation">.</span>datapoint<span class="token punctuation">.</span></span><span class="token class-name">FloatDataPoint</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>write<span class="token punctuation">.</span>record<span class="token punctuation">.</span>datapoint<span class="token punctuation">.</span></span><span class="token class-name">IntDataPoint</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>write<span class="token punctuation">.</span>schema<span class="token punctuation">.</span></span><span class="token class-name">MeasurementSchema</span><span class="token punctuation">;</span>
 <span class="token comment">/**
  * 将数据写入TsFile的示例
  * 它使用以下接口：
  * 公共无效addMeasurement（MeasurementSchema MeasurementSchema）抛出WriteProcessException
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TsFileWrite</span> <span class="token punctuation">{</span>

   <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span> args<span class="token punctuation">[</span><span class="token punctuation">]</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">try</span> <span class="token punctuation">{</span>
       <span class="token class-name">String</span> path <span class="token operator">=</span> <span class="token string">&quot;test.tsfile&quot;</span><span class="token punctuation">;</span>
       <span class="token class-name">File</span> f <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">File</span><span class="token punctuation">(</span>path<span class="token punctuation">)</span><span class="token punctuation">;</span>
       <span class="token keyword">if</span> <span class="token punctuation">(</span>f<span class="token punctuation">.</span><span class="token function">exists</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
         f<span class="token punctuation">.</span><span class="token function">delete</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       <span class="token punctuation">}</span>
       <span class="token class-name">TsFileWriter</span> tsFileWriter <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">TsFileWriter</span><span class="token punctuation">(</span>f<span class="token punctuation">)</span><span class="token punctuation">;</span>

       <span class="token comment">// 将度量添加到文件模式</span>
       tsFileWriter
           <span class="token punctuation">.</span><span class="token function">addMeasurement</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">MeasurementSchema</span><span class="token punctuation">(</span><span class="token string">&quot;sensor_1&quot;</span><span class="token punctuation">,</span> <span class="token class-name">TSDataType</span><span class="token punctuation">.</span>INT64<span class="token punctuation">,</span> <span class="token class-name">TSEncoding</span><span class="token punctuation">.</span>RLE<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       tsFileWriter
           <span class="token punctuation">.</span><span class="token function">addMeasurement</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">MeasurementSchema</span><span class="token punctuation">(</span><span class="token string">&quot;sensor_2&quot;</span><span class="token punctuation">,</span> <span class="token class-name">TSDataType</span><span class="token punctuation">.</span>INT64<span class="token punctuation">,</span> <span class="token class-name">TSEncoding</span><span class="token punctuation">.</span>RLE<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       tsFileWriter
           <span class="token punctuation">.</span><span class="token function">addMeasurement</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">MeasurementSchema</span><span class="token punctuation">(</span><span class="token string">&quot;sensor_3&quot;</span><span class="token punctuation">,</span> <span class="token class-name">TSDataType</span><span class="token punctuation">.</span>INT64<span class="token punctuation">,</span> <span class="token class-name">TSEncoding</span><span class="token punctuation">.</span>RLE<span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

       <span class="token comment">// 构造TSRecord</span>
       <span class="token class-name">TSRecord</span> tsRecord <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">TSRecord</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token string">&quot;device_1&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       <span class="token class-name">DataPoint</span> dPoint1 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">LongDataPoint</span><span class="token punctuation">(</span><span class="token string">&quot;sensor_1&quot;</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       <span class="token class-name">DataPoint</span> dPoint2 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">LongDataPoint</span><span class="token punctuation">(</span><span class="token string">&quot;sensor_2&quot;</span><span class="token punctuation">,</span> <span class="token number">2</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       <span class="token class-name">DataPoint</span> dPoint3 <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">LongDataPoint</span><span class="token punctuation">(</span><span class="token string">&quot;sensor_3&quot;</span><span class="token punctuation">,</span> <span class="token number">3</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       tsRecord<span class="token punctuation">.</span><span class="token function">addTuple</span><span class="token punctuation">(</span>dPoint1<span class="token punctuation">)</span><span class="token punctuation">;</span>
       tsRecord<span class="token punctuation">.</span><span class="token function">addTuple</span><span class="token punctuation">(</span>dPoint2<span class="token punctuation">)</span><span class="token punctuation">;</span>
       tsRecord<span class="token punctuation">.</span><span class="token function">addTuple</span><span class="token punctuation">(</span>dPoint3<span class="token punctuation">)</span><span class="token punctuation">;</span>

       <span class="token comment">// 写TSRecord</span>
       tsFileWriter<span class="token punctuation">.</span><span class="token function">write</span><span class="token punctuation">(</span>tsRecord<span class="token punctuation">)</span><span class="token punctuation">;</span>

       <span class="token comment">// 关闭TsFile</span>
       tsFileWriter<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span> <span class="token keyword">catch</span> <span class="token punctuation">(</span><span class="token class-name">Throwable</span> e<span class="token punctuation">)</span> <span class="token punctuation">{</span>
       e<span class="token punctuation">.</span><span class="token function">printStackTrace</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
       <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>e<span class="token punctuation">.</span><span class="token function">getMessage</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br><span class="line-number">54</span><br><span class="line-number">55</span><br><span class="line-number">56</span><br></div></div><h2 id="读取tsfile的接口"><a href="#读取tsfile的接口" class="header-anchor">#</a> 读取TsFile的接口</h2> <h3 id="开始之前"><a href="#开始之前" class="header-anchor">#</a> 开始之前</h3> <p>“时间序列数据”部分中的时间序列数据集在此用于本节的具体介绍。 下表中显示的集合包含一个名为“ device \ _1”的deltaObject和三个名为“ sensor \ _1”，“ sensor \ _2”和“ sensor \ _3”的测量值。 并简化了测量以进行简单说明，每个仅包含4个时间值对。</p> <table><thead><tr><th style="text-align:center;">关系</th> <th style="text-align:center;">描述</th></tr></thead> <tbody><tr><td style="text-align:center;">TimeFilter.eq(value)</td> <td style="text-align:center;">选择等于值的时间</td></tr> <tr><td style="text-align:center;">TimeFilter.lt(value)</td> <td style="text-align:center;">选择小于时间的时间</td></tr> <tr><td style="text-align:center;">TimeFilter.gt(value)</td> <td style="text-align:center;">选择大于值的时间</td></tr> <tr><td style="text-align:center;">TimeFilter.ltEq(value)</td> <td style="text-align:center;">选择小于或等于该值的时间</td></tr> <tr><td style="text-align:center;">TimeFilter.gtEq(value)</td> <td style="text-align:center;">选择大于或等于该值的时间</td></tr> <tr><td style="text-align:center;">TimeFilter.notEq(value)</td> <td style="text-align:center;">选择不等于该值的时间</td></tr> <tr><td style="text-align:center;">TimeFilter.not(TimeFilter)</td> <td style="text-align:center;">选择不满足另一个TimeFilter的时间</td></tr></tbody></table> <h3 id="路径定义"><a href="#路径定义" class="header-anchor">#</a> 路径定义</h3> <p>路径是用点分隔的字符串，该字符串在TsFile中唯一标识时间序列，例如“ root.area_1.device_1.sensor_1”。
 最后一部分“ sensor_1”称为“ measurementId”，其余部分“ root.area_1.device_1”称为deviceId。
 如上所述，不同设备中的相同测量具有相同的数据类型和编码，并且设备也是唯一的。</p> <p>在读取接口中，参数<code>paths</code>指示要选择的测量。</p> <p>路径实例可以通过<code>Path</code>类很容易地构造。 例如：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>Path p = new Path(&quot;device_1.sensor_1&quot;);
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>我们将传递路径的ArrayList进行最终查询，以支持多个路径。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>List&lt;Path&gt; paths = new ArrayList&lt;Path&gt;();
 paths.add(new Path(&quot;device_1.sensor_1&quot;));
 paths.add(new Path(&quot;device_1.sensor_3&quot;));
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><blockquote><p>**注意：**在构造路径时，参数的格式应为点分隔的字符串，最后一部分将被识别为MeasurementId，而其余部分将被识别为deviceId。</p></blockquote> <h3 id="过滤器的定义"><a href="#过滤器的定义" class="header-anchor">#</a> 过滤器的定义</h3> <h4 id="使用场景"><a href="#使用场景" class="header-anchor">#</a> 使用场景</h4> <p>在TsFile读取过程中使用筛选器来选择满足一个或多个给定条件的数据。</p> <h4 id="iexpression"><a href="#iexpression" class="header-anchor">#</a> IExpression</h4> <p><code>IExpression</code>是一个过滤器表达式接口，它将传递给我们的最终查询调用。
 我们创建一个或多个过滤器表达式，并可以使用二进制过滤器运算符将它们链接到最终表达式。</p> <ul><li><p><strong>创建一个过滤器表达式</strong></p> <p>有两种类型的过滤器。</p> <ul><li>时间过滤器: 时间序列数据中时间的过滤器。<div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = new GlobalTimeExpression(TimeFilter);
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div></li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code> 	使用以下关系获取`TimeFilter`对象（值是一个long int变量）。

 |            关系            |               描述               |
 | :------------------------: | :------------------------------: |
 |    TimeFilter.eq(value)    |         选择等于值的时间         |
 |    TimeFilter.lt(value)    |        选择小于时间的时间        |
 |    TimeFilter.gt(value)    |         选择大于值的时间         |
 |   TimeFilter.ltEq(value)   |     选择小于或等于该值的时间     |
 |   TimeFilter.gtEq(value)   |     选择大于或等于该值的时间     |
 |  TimeFilter.notEq(value)   |       选择不等于该值的时间       |
 | TimeFilter.not(TimeFilter) | 选择不满足另一个TimeFilter的时间 |

 * ValueFilter：时间序列数据中`value`的过滤器。

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br></div></div><p>IExpression valueFilterExpr = new SingleSeriesExpression(Path, ValueFilter);</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>	`ValueFilter`的用法与使用`TimeFilter`的用法相同，只是要确保值的类型等于测量值（在路径中定义）。

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div></li> <li><p><strong>二元滤波器运算符</strong></p> <p>二进制过滤器运算符可用于链接两个单个表达式。</p> <ul><li>BinaryExpression.and（Expression，Expression）：选择两个表达式都满足的值。</li> <li>BinaryExpression.or（Expression，Expression）：选择至少满足一个表达式的值。</li></ul></li></ul> <h4 id="过滤器表达式示例"><a href="#过滤器表达式示例" class="header-anchor">#</a> 过滤器表达式示例</h4> <ul><li><p><strong>TimeFilterExpression示例</strong></p> <div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = new GlobalTimeExpression(TimeFilter.eq(15)); // series time = 15

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = new GlobalTimeExpression(TimeFilter.ltEq(15)); // series time &lt;= 15

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = new GlobalTimeExpression(TimeFilter.lt(15)); // series time &lt; 15

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = new GlobalTimeExpression(TimeFilter.gtEq(15)); // series time &gt;= 15

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = new GlobalTimeExpression(TimeFilter.notEq(15)); // series time != 15

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = BinaryExpression.and(new GlobalTimeExpression(TimeFilter.gtEq(15L)),
                                          new GlobalTimeExpression(TimeFilter.lt(25L))); // 15 &lt;= series time &lt; 25
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>IExpression timeFilterExpr = BinaryExpression.or(new GlobalTimeExpression(TimeFilter.gtEq(15L)),
                                          new GlobalTimeExpression(TimeFilter.lt(25L))); // series time &gt;= 15 or series time &lt; 25
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div></li></ul> <h3 id="读取界面"><a href="#读取界面" class="header-anchor">#</a> 读取界面</h3> <p>首先，我们打开TsFile并从文件路径字符串<code>path</code>获取一个<code>ReadOnlyTsFile</code>实例。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>TsFileSequenceReader reader = new TsFileSequenceReader(path);

 ReadOnlyTsFile readTsFile = new ReadOnlyTsFile(reader);
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br></div></div><p>接下来，我们准备路径数组和查询表达式，然后通过此接口获取最终的<code>QueryExpression</code>对象：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>QueryExpression queryExpression = QueryExpression.create(paths, statement);
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>ReadOnlyTsFile类具有两个<code>query</code>方法来执行查询。</p> <ul><li><p><strong>方法1</strong></p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public QueryDataSet query(QueryExpression queryExpression) throws IOException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div></li> <li><p><strong>方法二</strong></p> <div class="language- line-numbers-mode"><pre class="language-text"><code>public QueryDataSet query(QueryExpression queryExpression, long partitionStartOffset, long partitionEndOffset) throws IOException
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>此方法设计用于高级应用程序，例如TsFile-Spark连接器。</p> <ul><li><p><strong>参数</strong>: 对于方法2，添加了两个附加参数以支持部分查询：</p> <ul><li><code>partitionStartOffset</code>:TsFile的起始偏移量</li> <li><code>partitionEndOffset</code>: TsFile的结束偏移量</li></ul> <blockquote><p>**什么是部分查询？**在某些分布式文件系统（例如HDFS）中，文件被分成几个部分，这些部分称为“块”，并存储在不同的节点中。 在涉及的每个节点中并行执行查询可以提高效率。 因此，需要部分查询。  Paritial Query只选择存储在零件中的结果，该零件由TsFile的<code>QueryConstant.PARTITION_START_OFFSET</code>和<code>QueryConstant.PARTITION_END_OFFSET</code>分开。</p></blockquote></li></ul></li></ul> <h3 id="querydataset接口"><a href="#querydataset接口" class="header-anchor">#</a> QueryDataset接口</h3> <p>上面执行的查询将返回一个<code>QueryDataset</code>对象。</p> <p>这是对用户有用的界面。</p> <ul><li><p><code>bool hasNext();</code></p> <p>如果此数据集仍包含元素，则返回true。</p></li> <li><p><code>List&lt;Path&gt; getPaths()</code></p> <p>获取此数据集中的路径。</p></li> <li><p><code>List&lt;TSDataType&gt; getDataTypes();</code></p> <p>获取数据类型。  <code>TSDataType</code>类是一个枚举类，值将是以下值之一：</p> <div class="language- extra-class"><pre><code> BOOLEAN,
  INT32,
  INT64,
  FLOAT,
  DOUBLE,
  TEXT;
 </code></pre></div></li> <li><p><code>RowRecord next() throws IOException;</code></p> <p>获取下一条记录。</p> <p><code>RowRecord</code>类由一个<code>long</code>时间戳和一个<code>List &lt;Field&gt;</code>组成，用于不同传感器中的数据，我们可以使用两种getter方法来获取它们。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>long getTimestamp();
 List&lt;Field&gt; getFields();
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><p>要从一个字段获取数据，请使用以下方法：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>TSDataType getDataType();
 Object getObjectValue();
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div></li></ul> <h3 id="读取现有tsfile的示例"><a href="#读取现有tsfile的示例" class="header-anchor">#</a> 读取现有TsFile的示例</h3> <p>您应该将TsFile安装到本地Maven存储库。</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>mvn clean install -pl tsfile -am -DskipTests
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>有关查询语句的更详尽示例，请参见：
 <code>/tsfile/example/src/main/java/org/apache/iotdb/tsfile/TsFileRead.java</code></p> <div class="language-java line-numbers-mode"><pre class="language-java"><code><span class="token keyword">package</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>io<span class="token punctuation">.</span></span><span class="token class-name">IOException</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">java<span class="token punctuation">.</span>util<span class="token punctuation">.</span></span><span class="token class-name">ArrayList</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span></span><span class="token class-name">ReadOnlyTsFile</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span></span><span class="token class-name">TsFileSequenceReader</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>common<span class="token punctuation">.</span></span><span class="token class-name">Path</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>expression<span class="token punctuation">.</span></span><span class="token class-name">IExpression</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>expression<span class="token punctuation">.</span></span><span class="token class-name">QueryExpression</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>expression<span class="token punctuation">.</span>impl<span class="token punctuation">.</span></span><span class="token class-name">BinaryExpression</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>expression<span class="token punctuation">.</span>impl<span class="token punctuation">.</span></span><span class="token class-name">GlobalTimeExpression</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>expression<span class="token punctuation">.</span>impl<span class="token punctuation">.</span></span><span class="token class-name">SingleSeriesExpression</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>filter<span class="token punctuation">.</span></span><span class="token class-name">TimeFilter</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>filter<span class="token punctuation">.</span></span><span class="token class-name">ValueFilter</span><span class="token punctuation">;</span>
 <span class="token keyword">import</span> <span class="token namespace">org<span class="token punctuation">.</span>apache<span class="token punctuation">.</span>iotdb<span class="token punctuation">.</span>tsfile<span class="token punctuation">.</span>read<span class="token punctuation">.</span>query<span class="token punctuation">.</span>dataset<span class="token punctuation">.</span></span><span class="token class-name">QueryDataSet</span><span class="token punctuation">;</span>

 <span class="token comment">/**
  * 该类将显示如何读取名为“ test.ts文件”的Ts文件文件。
  * TsFile文件“ test.tsfile”是从类TsFileWrite生成的。
  * 运行TsFileWrite首先生成test.tsfile
  */</span>
 <span class="token keyword">public</span> <span class="token keyword">class</span> <span class="token class-name">TsFileRead</span> <span class="token punctuation">{</span>
   <span class="token keyword">private</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">queryAndPrint</span><span class="token punctuation">(</span><span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Path</span><span class="token punctuation">&gt;</span></span> paths<span class="token punctuation">,</span> <span class="token class-name">ReadOnlyTsFile</span> readTsFile<span class="token punctuation">,</span> <span class="token class-name">IExpression</span> statement<span class="token punctuation">)</span>
           <span class="token keyword">throws</span> <span class="token class-name">IOException</span> <span class="token punctuation">{</span>
     <span class="token class-name">QueryExpression</span> queryExpression <span class="token operator">=</span> <span class="token class-name">QueryExpression</span><span class="token punctuation">.</span><span class="token function">create</span><span class="token punctuation">(</span>paths<span class="token punctuation">,</span> statement<span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token class-name">QueryDataSet</span> queryDataSet <span class="token operator">=</span> readTsFile<span class="token punctuation">.</span><span class="token function">query</span><span class="token punctuation">(</span>queryExpression<span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token keyword">while</span> <span class="token punctuation">(</span>queryDataSet<span class="token punctuation">.</span><span class="token function">hasNext</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
       <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span>queryDataSet<span class="token punctuation">.</span><span class="token function">next</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token punctuation">}</span>
     <span class="token class-name">System</span><span class="token punctuation">.</span>out<span class="token punctuation">.</span><span class="token function">println</span><span class="token punctuation">(</span><span class="token string">&quot;------------&quot;</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>

   <span class="token keyword">public</span> <span class="token keyword">static</span> <span class="token keyword">void</span> <span class="token function">main</span><span class="token punctuation">(</span><span class="token class-name">String</span><span class="token punctuation">[</span><span class="token punctuation">]</span> args<span class="token punctuation">)</span> <span class="token keyword">throws</span> <span class="token class-name">IOException</span> <span class="token punctuation">{</span>

     <span class="token comment">// 文件路径</span>
     <span class="token class-name">String</span> path <span class="token operator">=</span> <span class="token string">&quot;test.tsfile&quot;</span><span class="token punctuation">;</span>

     <span class="token comment">// 创建阅读器并获取readTsFile接口</span>
     <span class="token class-name">TsFileSequenceReader</span> reader <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">TsFileSequenceReader</span><span class="token punctuation">(</span>path<span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token class-name">ReadOnlyTsFile</span> readTsFile <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ReadOnlyTsFile</span><span class="token punctuation">(</span>reader<span class="token punctuation">)</span><span class="token punctuation">;</span>
     <span class="token comment">// 使用这些路径（所有传感器）进行所有查询</span>
     <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token class-name">Path</span><span class="token punctuation">&gt;</span></span> paths <span class="token operator">=</span> <span class="token keyword">new</span> <span class="token class-name">ArrayList</span><span class="token generics"><span class="token punctuation">&lt;</span><span class="token punctuation">&gt;</span></span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     paths<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Path</span><span class="token punctuation">(</span><span class="token string">&quot;device_1.sensor_1&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     paths<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Path</span><span class="token punctuation">(</span><span class="token string">&quot;device_1.sensor_2&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
     paths<span class="token punctuation">.</span><span class="token function">add</span><span class="token punctuation">(</span><span class="token keyword">new</span> <span class="token class-name">Path</span><span class="token punctuation">(</span><span class="token string">&quot;device_1.sensor_3&quot;</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

     <span class="token comment">// 没有查询语句</span>
     <span class="token function">queryAndPrint</span><span class="token punctuation">(</span>paths<span class="token punctuation">,</span> readTsFile<span class="token punctuation">,</span> <span class="token keyword">null</span><span class="token punctuation">)</span><span class="token punctuation">;</span>

     <span class="token comment">// 离开时关闭阅读器</span>
     reader<span class="token punctuation">.</span><span class="token function">close</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>

 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br><span class="line-number">3</span><br><span class="line-number">4</span><br><span class="line-number">5</span><br><span class="line-number">6</span><br><span class="line-number">7</span><br><span class="line-number">8</span><br><span class="line-number">9</span><br><span class="line-number">10</span><br><span class="line-number">11</span><br><span class="line-number">12</span><br><span class="line-number">13</span><br><span class="line-number">14</span><br><span class="line-number">15</span><br><span class="line-number">16</span><br><span class="line-number">17</span><br><span class="line-number">18</span><br><span class="line-number">19</span><br><span class="line-number">20</span><br><span class="line-number">21</span><br><span class="line-number">22</span><br><span class="line-number">23</span><br><span class="line-number">24</span><br><span class="line-number">25</span><br><span class="line-number">26</span><br><span class="line-number">27</span><br><span class="line-number">28</span><br><span class="line-number">29</span><br><span class="line-number">30</span><br><span class="line-number">31</span><br><span class="line-number">32</span><br><span class="line-number">33</span><br><span class="line-number">34</span><br><span class="line-number">35</span><br><span class="line-number">36</span><br><span class="line-number">37</span><br><span class="line-number">38</span><br><span class="line-number">39</span><br><span class="line-number">40</span><br><span class="line-number">41</span><br><span class="line-number">42</span><br><span class="line-number">43</span><br><span class="line-number">44</span><br><span class="line-number">45</span><br><span class="line-number">46</span><br><span class="line-number">47</span><br><span class="line-number">48</span><br><span class="line-number">49</span><br><span class="line-number">50</span><br><span class="line-number">51</span><br><span class="line-number">52</span><br><span class="line-number">53</span><br></div></div><h2 id="用户指定的配置文件路径"><a href="#用户指定的配置文件路径" class="header-anchor">#</a> 用户指定的配置文件路径</h2> <p>默认配置文件<code>tsfile-format.properties.template</code>位于<code>/ tsfile / src / main / resources</code>目录中。 如果要使用自己的路径，则可以：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>System.setProperty(TsFileConstant.TSFILE_CONF, &quot;your config file path&quot;);
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><p>然后调用：</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>TSFileConfig config = TSFileDescriptor.getInstance().getConfig();
 </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div></div> <div class="page-nav"><p class="inner"><span class="prev">
         ←
         <a href="/zh/UserGuide/V0.8.x/7-TsFile/1-Installation.html" class="prev">
           安装
         </a></span> <span class="next"><a href="/zh/UserGuide/V0.8.x/7-TsFile/3-Hierarchy.html">
           TsFile层次结构
         </a>
         →
       </span></p></div> <p style="text-align: center;">Copyright © 2021 The Apache Software Foundation.<br>
      Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p> <p style="text-align: center; margin-top: 10px; color: #444">
     Contact us: Join QQ Group 659990460 | Add friend <i>tietouqiao</i> and be invited to Wechat Group<br>
     see <a href="https://github.com/apache/iotdb/issues/1995">Join the community</a> for more</p></main></div><div class="global-ui"></div></div>
     <script src="/assets/js/app.22278a52.js" defer></script><script src="/assets/js/3.9588d9cb.js" defer></script><script src="/assets/js/4.e8b2d372.js" defer></script><script src="/assets/js/605.1d68da53.js" defer></script>
   </body>
 </html>