| <!DOCTYPE html> |
| <html lang="en-US"> |
| <head> |
| <meta charset="utf-8"> |
| <meta name="viewport" content="width=device-width,initial-scale=1"> |
| <title> </title> |
| <meta name="generator" content="VuePress 1.5.2"> |
| <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.ec7af591.css" as="style"><link rel="preload" href="/assets/js/app.aab05fb2.js" as="script"><link rel="preload" href="/assets/js/3.1dc302ea.js" as="script"><link rel="preload" href="/assets/js/201.2008406c.js" as="script"><link rel="prefetch" href="/assets/js/10.df7ec35f.js"><link rel="prefetch" href="/assets/js/100.eb839982.js"><link rel="prefetch" href="/assets/js/101.62cc7e3c.js"><link rel="prefetch" href="/assets/js/102.4fb75106.js"><link rel="prefetch" href="/assets/js/103.d948e8d2.js"><link rel="prefetch" href="/assets/js/104.dc2ec975.js"><link rel="prefetch" href="/assets/js/105.8c9c6ca3.js"><link rel="prefetch" href="/assets/js/106.787e200d.js"><link rel="prefetch" href="/assets/js/107.48adb385.js"><link rel="prefetch" href="/assets/js/108.2dd434b6.js"><link rel="prefetch" href="/assets/js/109.d5bd6b44.js"><link rel="prefetch" href="/assets/js/11.fdd2791a.js"><link rel="prefetch" href="/assets/js/110.db673f1b.js"><link rel="prefetch" href="/assets/js/111.5786d2f6.js"><link rel="prefetch" href="/assets/js/112.40054610.js"><link rel="prefetch" href="/assets/js/113.78698039.js"><link rel="prefetch" href="/assets/js/114.1a34e10c.js"><link rel="prefetch" href="/assets/js/115.c5191fa3.js"><link rel="prefetch" href="/assets/js/116.b522d27c.js"><link rel="prefetch" href="/assets/js/117.d58b55e7.js"><link rel="prefetch" href="/assets/js/118.f996da1b.js"><link rel="prefetch" href="/assets/js/119.95d2c7eb.js"><link rel="prefetch" href="/assets/js/12.53a797d3.js"><link rel="prefetch" href="/assets/js/120.c1e94071.js"><link rel="prefetch" href="/assets/js/121.32bdde4b.js"><link rel="prefetch" href="/assets/js/122.00b68073.js"><link rel="prefetch" href="/assets/js/123.a9afc8fd.js"><link rel="prefetch" href="/assets/js/124.1497f406.js"><link rel="prefetch" href="/assets/js/125.70e1f532.js"><link rel="prefetch" href="/assets/js/126.dd069639.js"><link rel="prefetch" href="/assets/js/127.0a4bd1cd.js"><link rel="prefetch" href="/assets/js/128.66a4bdd6.js"><link rel="prefetch" href="/assets/js/129.31da435b.js"><link rel="prefetch" href="/assets/js/13.769b2d75.js"><link rel="prefetch" href="/assets/js/130.a55118c1.js"><link rel="prefetch" href="/assets/js/131.692c7e8c.js"><link rel="prefetch" href="/assets/js/132.92f478be.js"><link rel="prefetch" href="/assets/js/133.d8d1fda7.js"><link rel="prefetch" href="/assets/js/134.079a54eb.js"><link rel="prefetch" href="/assets/js/135.603463f1.js"><link rel="prefetch" href="/assets/js/136.1367f4f4.js"><link rel="prefetch" href="/assets/js/137.e2dd9afd.js"><link rel="prefetch" href="/assets/js/138.aef15ddd.js"><link rel="prefetch" href="/assets/js/139.0a4e81c3.js"><link rel="prefetch" href="/assets/js/14.c590e545.js"><link rel="prefetch" href="/assets/js/140.7fcac681.js"><link rel="prefetch" href="/assets/js/141.490f341e.js"><link rel="prefetch" href="/assets/js/142.8695a90f.js"><link rel="prefetch" href="/assets/js/143.2906308a.js"><link rel="prefetch" href="/assets/js/144.3ef9d83e.js"><link rel="prefetch" href="/assets/js/145.b7e21983.js"><link rel="prefetch" href="/assets/js/146.f4f05f49.js"><link rel="prefetch" href="/assets/js/147.2cf5fcc7.js"><link rel="prefetch" href="/assets/js/148.4ca7f432.js"><link rel="prefetch" href="/assets/js/149.b892eba8.js"><link rel="prefetch" href="/assets/js/15.4e36e03a.js"><link rel="prefetch" href="/assets/js/150.c3b675ab.js"><link rel="prefetch" href="/assets/js/151.573ed3bf.js"><link rel="prefetch" href="/assets/js/152.847be55c.js"><link rel="prefetch" href="/assets/js/153.ac2f5049.js"><link rel="prefetch" href="/assets/js/154.d8f17cf5.js"><link rel="prefetch" href="/assets/js/155.7e577cee.js"><link rel="prefetch" href="/assets/js/156.09e95d19.js"><link rel="prefetch" href="/assets/js/157.26abc4b8.js"><link rel="prefetch" href="/assets/js/158.77955f1f.js"><link rel="prefetch" href="/assets/js/159.c355ea29.js"><link rel="prefetch" href="/assets/js/16.0b89faa2.js"><link rel="prefetch" href="/assets/js/160.e4ef16f7.js"><link rel="prefetch" href="/assets/js/161.910be1d9.js"><link rel="prefetch" href="/assets/js/162.632afcfd.js"><link rel="prefetch" href="/assets/js/163.f5057cff.js"><link rel="prefetch" href="/assets/js/164.744b0d75.js"><link rel="prefetch" href="/assets/js/165.58f59259.js"><link rel="prefetch" href="/assets/js/166.ca91cb14.js"><link rel="prefetch" href="/assets/js/167.542edc26.js"><link rel="prefetch" href="/assets/js/168.bb4a1767.js"><link rel="prefetch" href="/assets/js/169.cd7762cb.js"><link rel="prefetch" href="/assets/js/17.54956aa7.js"><link rel="prefetch" href="/assets/js/170.bc1fbd49.js"><link rel="prefetch" href="/assets/js/171.957b8fc0.js"><link rel="prefetch" href="/assets/js/172.07512139.js"><link rel="prefetch" href="/assets/js/173.1dc87f34.js"><link rel="prefetch" href="/assets/js/174.8cc0b78c.js"><link rel="prefetch" href="/assets/js/175.fff490c7.js"><link rel="prefetch" href="/assets/js/176.8f18d71a.js"><link rel="prefetch" href="/assets/js/177.c14bf697.js"><link rel="prefetch" href="/assets/js/178.484171c5.js"><link rel="prefetch" href="/assets/js/179.db8ce2fc.js"><link rel="prefetch" href="/assets/js/18.74f41e6a.js"><link rel="prefetch" href="/assets/js/180.e2d90285.js"><link rel="prefetch" href="/assets/js/181.89d19240.js"><link rel="prefetch" href="/assets/js/182.d6a1e6c1.js"><link rel="prefetch" href="/assets/js/183.0e33f8be.js"><link rel="prefetch" href="/assets/js/184.4f2a386b.js"><link rel="prefetch" href="/assets/js/185.88f314d4.js"><link rel="prefetch" href="/assets/js/186.c88ddd9d.js"><link rel="prefetch" href="/assets/js/187.361a4180.js"><link rel="prefetch" href="/assets/js/188.3bd63846.js"><link rel="prefetch" href="/assets/js/189.a1cde7be.js"><link rel="prefetch" href="/assets/js/19.b2902618.js"><link rel="prefetch" href="/assets/js/190.6ada374d.js"><link rel="prefetch" href="/assets/js/191.3c92390c.js"><link rel="prefetch" href="/assets/js/192.79ef5864.js"><link rel="prefetch" href="/assets/js/193.f037d2e1.js"><link rel="prefetch" href="/assets/js/194.ea7f7dae.js"><link rel="prefetch" href="/assets/js/195.986eb514.js"><link rel="prefetch" href="/assets/js/196.647c1541.js"><link rel="prefetch" href="/assets/js/197.5b581b72.js"><link rel="prefetch" href="/assets/js/198.ffb0d3bb.js"><link rel="prefetch" href="/assets/js/199.2d0d96c8.js"><link rel="prefetch" href="/assets/js/20.6630eb9b.js"><link rel="prefetch" href="/assets/js/200.c5aad4aa.js"><link rel="prefetch" href="/assets/js/202.8c1db698.js"><link rel="prefetch" href="/assets/js/203.d5203c70.js"><link rel="prefetch" href="/assets/js/204.e54acfa8.js"><link rel="prefetch" href="/assets/js/205.c4b100e4.js"><link rel="prefetch" href="/assets/js/206.e49b85d8.js"><link rel="prefetch" href="/assets/js/207.29a65e32.js"><link rel="prefetch" href="/assets/js/208.96c25b78.js"><link rel="prefetch" href="/assets/js/209.da5b902e.js"><link rel="prefetch" href="/assets/js/21.7348c820.js"><link rel="prefetch" href="/assets/js/210.0996b0bc.js"><link rel="prefetch" href="/assets/js/211.1daccc6a.js"><link rel="prefetch" href="/assets/js/212.30632baa.js"><link rel="prefetch" href="/assets/js/213.7c93918f.js"><link rel="prefetch" href="/assets/js/214.ef5415e3.js"><link rel="prefetch" href="/assets/js/215.efbf083a.js"><link rel="prefetch" href="/assets/js/216.4f8f1a97.js"><link rel="prefetch" href="/assets/js/217.aa94f853.js"><link rel="prefetch" href="/assets/js/218.7b852cd9.js"><link rel="prefetch" href="/assets/js/219.43f1e1a9.js"><link rel="prefetch" href="/assets/js/22.342c3455.js"><link rel="prefetch" href="/assets/js/220.46e3baeb.js"><link rel="prefetch" href="/assets/js/221.90351c5d.js"><link rel="prefetch" href="/assets/js/222.566b541a.js"><link rel="prefetch" href="/assets/js/223.e69b2bf7.js"><link rel="prefetch" href="/assets/js/224.4407f53f.js"><link rel="prefetch" href="/assets/js/225.5da34be9.js"><link rel="prefetch" href="/assets/js/226.0cd60a1c.js"><link rel="prefetch" href="/assets/js/227.5190fe78.js"><link rel="prefetch" href="/assets/js/228.d32ee20e.js"><link rel="prefetch" href="/assets/js/229.42f60648.js"><link rel="prefetch" href="/assets/js/23.a1dc7ce4.js"><link rel="prefetch" href="/assets/js/230.fb64689c.js"><link rel="prefetch" href="/assets/js/231.941ed40a.js"><link rel="prefetch" href="/assets/js/232.b76c5958.js"><link rel="prefetch" href="/assets/js/233.fdbc3089.js"><link rel="prefetch" href="/assets/js/234.e427f6ad.js"><link rel="prefetch" href="/assets/js/235.71d57a1d.js"><link rel="prefetch" href="/assets/js/236.043d2fa9.js"><link rel="prefetch" href="/assets/js/237.7935de95.js"><link rel="prefetch" href="/assets/js/238.3f43ff91.js"><link rel="prefetch" href="/assets/js/239.a3762b13.js"><link rel="prefetch" href="/assets/js/24.7d99b547.js"><link rel="prefetch" href="/assets/js/240.264dc456.js"><link rel="prefetch" href="/assets/js/241.d8ebf4e1.js"><link rel="prefetch" href="/assets/js/242.7883df9a.js"><link rel="prefetch" href="/assets/js/243.3d0545a3.js"><link rel="prefetch" href="/assets/js/244.b254bb28.js"><link rel="prefetch" href="/assets/js/245.721a0673.js"><link rel="prefetch" href="/assets/js/246.3d2e0605.js"><link rel="prefetch" href="/assets/js/247.db755fe6.js"><link rel="prefetch" href="/assets/js/248.70ba84e9.js"><link rel="prefetch" href="/assets/js/249.c1c45b75.js"><link rel="prefetch" href="/assets/js/25.e9c9b8c3.js"><link rel="prefetch" href="/assets/js/250.28854dfe.js"><link rel="prefetch" href="/assets/js/251.c64305bb.js"><link rel="prefetch" href="/assets/js/252.bfb4ef3d.js"><link rel="prefetch" href="/assets/js/253.7c4e160d.js"><link rel="prefetch" href="/assets/js/254.3bb9c624.js"><link rel="prefetch" href="/assets/js/255.d5d8be96.js"><link rel="prefetch" href="/assets/js/256.d559b233.js"><link rel="prefetch" href="/assets/js/257.758697f3.js"><link rel="prefetch" href="/assets/js/258.7ddfde22.js"><link rel="prefetch" href="/assets/js/259.c1c40084.js"><link rel="prefetch" href="/assets/js/26.e429c51b.js"><link rel="prefetch" href="/assets/js/260.f918b40f.js"><link rel="prefetch" href="/assets/js/261.cd3ecfe4.js"><link rel="prefetch" href="/assets/js/262.4a65733d.js"><link rel="prefetch" href="/assets/js/263.d4643aa4.js"><link rel="prefetch" href="/assets/js/264.8034043d.js"><link rel="prefetch" href="/assets/js/265.2d6e5394.js"><link rel="prefetch" href="/assets/js/266.945130cb.js"><link rel="prefetch" href="/assets/js/267.5779d8ad.js"><link rel="prefetch" href="/assets/js/268.3b8f7bf7.js"><link rel="prefetch" href="/assets/js/269.a6ea55d0.js"><link rel="prefetch" href="/assets/js/27.1092da6f.js"><link rel="prefetch" href="/assets/js/270.9e898993.js"><link rel="prefetch" href="/assets/js/271.d92f29b1.js"><link rel="prefetch" href="/assets/js/272.1cde5105.js"><link rel="prefetch" href="/assets/js/273.1df9246d.js"><link rel="prefetch" href="/assets/js/274.1d6613c2.js"><link rel="prefetch" href="/assets/js/275.55412b2d.js"><link rel="prefetch" href="/assets/js/276.eea117ab.js"><link rel="prefetch" href="/assets/js/277.d8cfd95d.js"><link rel="prefetch" href="/assets/js/278.ffad1db7.js"><link rel="prefetch" href="/assets/js/279.47bf065d.js"><link rel="prefetch" href="/assets/js/28.53650c51.js"><link rel="prefetch" href="/assets/js/280.49a50966.js"><link rel="prefetch" href="/assets/js/281.77b2a706.js"><link rel="prefetch" href="/assets/js/282.2714e4c8.js"><link rel="prefetch" href="/assets/js/283.1575531b.js"><link rel="prefetch" href="/assets/js/284.2c0c07ad.js"><link rel="prefetch" href="/assets/js/285.1696a921.js"><link rel="prefetch" href="/assets/js/286.5d791a4f.js"><link rel="prefetch" href="/assets/js/287.22c1ce09.js"><link rel="prefetch" href="/assets/js/288.652aaa7e.js"><link rel="prefetch" href="/assets/js/289.a07dc9d5.js"><link rel="prefetch" href="/assets/js/29.066202c5.js"><link rel="prefetch" href="/assets/js/290.597e6c27.js"><link rel="prefetch" href="/assets/js/291.307b1ef3.js"><link rel="prefetch" href="/assets/js/292.2939b2d7.js"><link rel="prefetch" href="/assets/js/293.42df9e57.js"><link rel="prefetch" href="/assets/js/294.f686160c.js"><link rel="prefetch" href="/assets/js/295.6e9b105c.js"><link rel="prefetch" href="/assets/js/296.f7fc5047.js"><link rel="prefetch" href="/assets/js/297.8482da6f.js"><link rel="prefetch" href="/assets/js/298.c2879999.js"><link rel="prefetch" href="/assets/js/299.177ef1c1.js"><link rel="prefetch" href="/assets/js/30.8899de4a.js"><link rel="prefetch" href="/assets/js/300.c3011a98.js"><link rel="prefetch" href="/assets/js/301.7595ce9b.js"><link rel="prefetch" href="/assets/js/302.a4083048.js"><link rel="prefetch" href="/assets/js/303.20e1e819.js"><link rel="prefetch" href="/assets/js/304.e69eabb5.js"><link rel="prefetch" href="/assets/js/305.18813104.js"><link rel="prefetch" href="/assets/js/306.db4c539d.js"><link rel="prefetch" href="/assets/js/307.1eadef68.js"><link rel="prefetch" href="/assets/js/308.0c148c77.js"><link rel="prefetch" href="/assets/js/309.75f04fa5.js"><link rel="prefetch" href="/assets/js/31.74a260ea.js"><link rel="prefetch" href="/assets/js/310.956c93b3.js"><link rel="prefetch" href="/assets/js/311.fab6126e.js"><link rel="prefetch" href="/assets/js/312.472991b0.js"><link rel="prefetch" href="/assets/js/313.b8d0b24a.js"><link rel="prefetch" href="/assets/js/314.24577949.js"><link rel="prefetch" href="/assets/js/315.87d89712.js"><link rel="prefetch" href="/assets/js/316.570b8ece.js"><link rel="prefetch" href="/assets/js/317.8630c35a.js"><link rel="prefetch" href="/assets/js/318.1d9e6706.js"><link rel="prefetch" href="/assets/js/319.4097770a.js"><link rel="prefetch" href="/assets/js/32.7dba92e8.js"><link rel="prefetch" href="/assets/js/320.a4d30cfc.js"><link rel="prefetch" href="/assets/js/321.efd17a08.js"><link rel="prefetch" href="/assets/js/322.1975e542.js"><link rel="prefetch" href="/assets/js/323.f43938be.js"><link rel="prefetch" href="/assets/js/324.80e620c4.js"><link rel="prefetch" href="/assets/js/325.eea5c98b.js"><link rel="prefetch" href="/assets/js/326.b01277ee.js"><link rel="prefetch" href="/assets/js/327.7f068672.js"><link rel="prefetch" href="/assets/js/328.f2f456c1.js"><link rel="prefetch" href="/assets/js/329.7879d79b.js"><link rel="prefetch" href="/assets/js/33.6f1de65a.js"><link rel="prefetch" href="/assets/js/330.c4f06595.js"><link rel="prefetch" href="/assets/js/331.dcecbbb4.js"><link rel="prefetch" href="/assets/js/332.56b7ace5.js"><link rel="prefetch" href="/assets/js/333.5b3dc02e.js"><link rel="prefetch" href="/assets/js/334.2445b2e3.js"><link rel="prefetch" href="/assets/js/335.c1a7666e.js"><link rel="prefetch" href="/assets/js/336.14ea02eb.js"><link rel="prefetch" href="/assets/js/337.92a1eebf.js"><link rel="prefetch" href="/assets/js/338.e2c82f63.js"><link rel="prefetch" href="/assets/js/339.61ab3afc.js"><link rel="prefetch" href="/assets/js/34.bd36ea6d.js"><link rel="prefetch" href="/assets/js/340.e6381542.js"><link rel="prefetch" href="/assets/js/341.06d1a04a.js"><link rel="prefetch" href="/assets/js/342.0c7db480.js"><link rel="prefetch" href="/assets/js/343.eae84cc4.js"><link rel="prefetch" href="/assets/js/344.600f5857.js"><link rel="prefetch" href="/assets/js/345.895f6f4e.js"><link rel="prefetch" href="/assets/js/346.0f36054a.js"><link rel="prefetch" href="/assets/js/347.fb779741.js"><link rel="prefetch" href="/assets/js/348.c8c979e8.js"><link rel="prefetch" href="/assets/js/349.7c8c7182.js"><link rel="prefetch" href="/assets/js/35.8794367a.js"><link rel="prefetch" href="/assets/js/350.6594590a.js"><link rel="prefetch" href="/assets/js/351.53fce239.js"><link rel="prefetch" href="/assets/js/352.35ec8ac2.js"><link rel="prefetch" href="/assets/js/353.7b4fbfbb.js"><link rel="prefetch" href="/assets/js/354.23ecd67f.js"><link rel="prefetch" href="/assets/js/355.3036280e.js"><link rel="prefetch" href="/assets/js/356.6994b1c5.js"><link rel="prefetch" href="/assets/js/357.87843ebc.js"><link rel="prefetch" href="/assets/js/358.99fb8c0e.js"><link rel="prefetch" href="/assets/js/359.4a8e0f6b.js"><link rel="prefetch" href="/assets/js/36.dbfe70fd.js"><link rel="prefetch" href="/assets/js/360.3b6b56f2.js"><link rel="prefetch" href="/assets/js/361.6a890781.js"><link rel="prefetch" href="/assets/js/362.d7161ced.js"><link rel="prefetch" href="/assets/js/363.a9ab6794.js"><link rel="prefetch" href="/assets/js/364.5ea7b05c.js"><link rel="prefetch" href="/assets/js/365.6ee82532.js"><link rel="prefetch" href="/assets/js/366.695af3fe.js"><link rel="prefetch" href="/assets/js/367.fa247cc1.js"><link rel="prefetch" href="/assets/js/368.ce8203d7.js"><link rel="prefetch" href="/assets/js/369.07ce9f2d.js"><link rel="prefetch" href="/assets/js/37.7ad39219.js"><link rel="prefetch" href="/assets/js/370.1f03bbad.js"><link rel="prefetch" href="/assets/js/371.c53badb2.js"><link rel="prefetch" href="/assets/js/372.61dae475.js"><link rel="prefetch" href="/assets/js/373.19d3b9dc.js"><link rel="prefetch" href="/assets/js/374.deba685c.js"><link rel="prefetch" href="/assets/js/375.b8774b96.js"><link rel="prefetch" href="/assets/js/376.8ffb9732.js"><link rel="prefetch" href="/assets/js/377.a78a55c5.js"><link rel="prefetch" href="/assets/js/378.25a24939.js"><link rel="prefetch" href="/assets/js/379.ee6780ec.js"><link rel="prefetch" href="/assets/js/38.571d97a7.js"><link rel="prefetch" href="/assets/js/380.2c8e4c39.js"><link rel="prefetch" href="/assets/js/381.d2537d37.js"><link rel="prefetch" href="/assets/js/382.f188f5aa.js"><link rel="prefetch" href="/assets/js/383.19ba3299.js"><link rel="prefetch" href="/assets/js/384.14229453.js"><link rel="prefetch" href="/assets/js/385.e72e7623.js"><link rel="prefetch" href="/assets/js/386.e5fd2287.js"><link rel="prefetch" href="/assets/js/387.348649a0.js"><link rel="prefetch" href="/assets/js/388.91379896.js"><link rel="prefetch" href="/assets/js/389.ae818bc1.js"><link rel="prefetch" href="/assets/js/39.afda26e0.js"><link rel="prefetch" href="/assets/js/390.9bc0ecf2.js"><link rel="prefetch" href="/assets/js/391.96918708.js"><link rel="prefetch" href="/assets/js/392.ecb684cf.js"><link rel="prefetch" href="/assets/js/393.f1a2f009.js"><link rel="prefetch" href="/assets/js/394.1b21a999.js"><link rel="prefetch" href="/assets/js/395.b94a7ea2.js"><link rel="prefetch" href="/assets/js/396.e4592dfd.js"><link rel="prefetch" href="/assets/js/397.1c34de3b.js"><link rel="prefetch" href="/assets/js/398.5341fb9b.js"><link rel="prefetch" href="/assets/js/399.5585f448.js"><link rel="prefetch" href="/assets/js/4.256130eb.js"><link rel="prefetch" href="/assets/js/40.a7fda1a5.js"><link rel="prefetch" href="/assets/js/400.7202f552.js"><link rel="prefetch" href="/assets/js/401.42943381.js"><link rel="prefetch" href="/assets/js/402.90c70df5.js"><link rel="prefetch" href="/assets/js/403.9513b679.js"><link rel="prefetch" href="/assets/js/404.56ae1c4e.js"><link rel="prefetch" href="/assets/js/405.736155d7.js"><link rel="prefetch" href="/assets/js/406.0b7c929c.js"><link rel="prefetch" href="/assets/js/407.f1660a22.js"><link rel="prefetch" href="/assets/js/408.d77b4eed.js"><link rel="prefetch" href="/assets/js/409.57b13e89.js"><link rel="prefetch" href="/assets/js/41.d0455f88.js"><link rel="prefetch" href="/assets/js/410.0ac0b985.js"><link rel="prefetch" href="/assets/js/411.a24fe3ce.js"><link rel="prefetch" href="/assets/js/412.c8949d31.js"><link rel="prefetch" href="/assets/js/413.9348cdaf.js"><link rel="prefetch" href="/assets/js/414.5476bceb.js"><link rel="prefetch" href="/assets/js/415.367d85f6.js"><link rel="prefetch" href="/assets/js/416.556d1b58.js"><link rel="prefetch" href="/assets/js/417.43c05f09.js"><link rel="prefetch" href="/assets/js/418.120b5cef.js"><link rel="prefetch" href="/assets/js/419.9f19f44b.js"><link rel="prefetch" href="/assets/js/42.0918e90a.js"><link rel="prefetch" href="/assets/js/420.f104a309.js"><link rel="prefetch" href="/assets/js/421.9126aec5.js"><link rel="prefetch" href="/assets/js/422.5cf330d9.js"><link rel="prefetch" href="/assets/js/423.d7231f78.js"><link rel="prefetch" href="/assets/js/424.6df09c53.js"><link rel="prefetch" href="/assets/js/43.10d96685.js"><link rel="prefetch" href="/assets/js/44.a3535bf1.js"><link rel="prefetch" href="/assets/js/45.a70f329b.js"><link rel="prefetch" href="/assets/js/46.5b5905c7.js"><link rel="prefetch" href="/assets/js/47.7a327a86.js"><link rel="prefetch" href="/assets/js/48.6b166b34.js"><link rel="prefetch" href="/assets/js/49.649d442c.js"><link rel="prefetch" href="/assets/js/5.f601e2c6.js"><link rel="prefetch" href="/assets/js/50.c5fb2695.js"><link rel="prefetch" href="/assets/js/51.a0ab7916.js"><link rel="prefetch" href="/assets/js/52.d1ec2122.js"><link rel="prefetch" href="/assets/js/53.397b47bc.js"><link rel="prefetch" href="/assets/js/54.65465bf1.js"><link rel="prefetch" href="/assets/js/55.80ea5cb9.js"><link rel="prefetch" href="/assets/js/56.b2f340c6.js"><link rel="prefetch" href="/assets/js/57.19a2c675.js"><link rel="prefetch" href="/assets/js/58.30b2d7e4.js"><link rel="prefetch" href="/assets/js/59.680940a9.js"><link rel="prefetch" href="/assets/js/6.721631ef.js"><link rel="prefetch" href="/assets/js/60.a608a453.js"><link rel="prefetch" href="/assets/js/61.cc1db890.js"><link rel="prefetch" href="/assets/js/62.7e8f4824.js"><link rel="prefetch" href="/assets/js/63.1a495e69.js"><link rel="prefetch" href="/assets/js/64.bc808e35.js"><link rel="prefetch" href="/assets/js/65.4599fb61.js"><link rel="prefetch" href="/assets/js/66.9f519a71.js"><link rel="prefetch" href="/assets/js/67.c2eea14a.js"><link rel="prefetch" href="/assets/js/68.7dacd0ee.js"><link rel="prefetch" href="/assets/js/69.3cf6be47.js"><link rel="prefetch" href="/assets/js/7.ca2cff26.js"><link rel="prefetch" href="/assets/js/70.154db1d1.js"><link rel="prefetch" href="/assets/js/71.5e74a55e.js"><link rel="prefetch" href="/assets/js/72.04b04992.js"><link rel="prefetch" href="/assets/js/73.6d44ceae.js"><link rel="prefetch" href="/assets/js/74.46618890.js"><link rel="prefetch" href="/assets/js/75.cf1936c6.js"><link rel="prefetch" href="/assets/js/76.f16398a0.js"><link rel="prefetch" href="/assets/js/77.01918d4a.js"><link rel="prefetch" href="/assets/js/78.f9911849.js"><link rel="prefetch" href="/assets/js/79.23a27387.js"><link rel="prefetch" href="/assets/js/8.c47fdf90.js"><link rel="prefetch" href="/assets/js/80.3f146599.js"><link rel="prefetch" href="/assets/js/81.fd4cc088.js"><link rel="prefetch" href="/assets/js/82.99513a8e.js"><link rel="prefetch" href="/assets/js/83.c6be4217.js"><link rel="prefetch" href="/assets/js/84.421f5640.js"><link rel="prefetch" href="/assets/js/85.820ffd5a.js"><link rel="prefetch" href="/assets/js/86.497e18c6.js"><link rel="prefetch" href="/assets/js/87.ae9e8388.js"><link rel="prefetch" href="/assets/js/88.4c5105e2.js"><link rel="prefetch" href="/assets/js/89.1f652761.js"><link rel="prefetch" href="/assets/js/9.cc76f2db.js"><link rel="prefetch" href="/assets/js/90.4a9eb03c.js"><link rel="prefetch" href="/assets/js/91.7e226fac.js"><link rel="prefetch" href="/assets/js/92.dd96bf00.js"><link rel="prefetch" href="/assets/js/93.ec32463a.js"><link rel="prefetch" href="/assets/js/94.9575ff6e.js"><link rel="prefetch" href="/assets/js/95.99afeeb5.js"><link rel="prefetch" href="/assets/js/96.063584de.js"><link rel="prefetch" href="/assets/js/97.e7ed0e68.js"><link rel="prefetch" href="/assets/js/98.873a8141.js"><link rel="prefetch" href="/assets/js/99.9cd99ea3.js"><link rel="prefetch" href="/assets/js/vendors~docsearch.3b3aacb0.js"> |
| <link rel="stylesheet" href="/assets/css/0.styles.ec7af591.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="/" 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">Document</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/Master/Get Started/QuickStart.html" class="nav-link">In progress</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.10.x/Get Started/QuickStart.html" class="nav-link">V0.10.x</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.9.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.9.x</a></li><li class="dropdown-item"><!----> <a href="/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="/SystemDesign/Architecture/Architecture.html" class="nav-link">System design</a></div><div class="nav-item"><a href="/Download/" class="nav-link">Download</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Community</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="/Community/Community-Project Committers.html" class="nav-link">People</a></li><li class="dropdown-item"><!----> <a href="/Community/Community-Powered By.html" class="nav-link">Powered By</a></li><li class="dropdown-item"><!----> <a href="/Community/Materials.html" class="nav-link">Resources</a></li><li class="dropdown-item"><!----> <a href="/Community/Feedback.html" class="nav-link">Feedback</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Development</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/Development/VoteRelease.html" class="nav-link">How to vote</a></li><li class="dropdown-item"><!----> <a href="/Development/HowToCommit.html" class="nav-link">How to Commit</a></li><li class="dropdown-item"><!----> <a href="/Development/Committer.html" class="nav-link">Become a Committer</a></li><li class="dropdown-item"><!----> <a href="/Development/ContributeGuide.html" class="nav-link">ContributeGuide</a></li><li class="dropdown-item"><!----> <a href="/Development/format-changelist.html" class="nav-link">Changelist of TsFile</a></li><li class="dropdown-item"><!----> <a href="/Development/rpc-changelist.html" class="nav-link">Changelist of RPC</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Blog</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/Blog/Index.html" class="nav-link">Overview</a></li><li class="dropdown-item"><!----> <a href="/Blog/Release0_93.html" class="nav-link">Some Notes on Release 0.9.3 and upcoming 0.10.0</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"> |
| Foundation |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/licenses/" class="nav-link external"> |
| License |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/security/" class="nav-link external"> |
| Security |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/sponsorship.html" class="nav-link external"> |
| Sponsorship |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/thanks.html" class="nav-link external"> |
| Thanks |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/events/current-event" class="nav-link external"> |
| Current Events |
| <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Languages</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/V0.9.x/5-Operation Manual/4-SQL Reference.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.9.x/5-Operation Manual/4-SQL Reference.html" class="nav-link">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/incubator-iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link"> |
| gitHub |
| <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" 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></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">Document</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/Master/Get Started/QuickStart.html" class="nav-link">In progress</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.10.x/Get Started/QuickStart.html" class="nav-link">V0.10.x</a></li><li class="dropdown-item"><!----> <a href="/UserGuide/V0.9.x/0-Get Started/1-QuickStart.html" class="nav-link">V0.9.x</a></li><li class="dropdown-item"><!----> <a href="/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="/SystemDesign/Architecture/Architecture.html" class="nav-link">System design</a></div><div class="nav-item"><a href="/Download/" class="nav-link">Download</a></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Community</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="/Community/Community-Project Committers.html" class="nav-link">People</a></li><li class="dropdown-item"><!----> <a href="/Community/Community-Powered By.html" class="nav-link">Powered By</a></li><li class="dropdown-item"><!----> <a href="/Community/Materials.html" class="nav-link">Resources</a></li><li class="dropdown-item"><!----> <a href="/Community/Feedback.html" class="nav-link">Feedback</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Development</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/Development/VoteRelease.html" class="nav-link">How to vote</a></li><li class="dropdown-item"><!----> <a href="/Development/HowToCommit.html" class="nav-link">How to Commit</a></li><li class="dropdown-item"><!----> <a href="/Development/Committer.html" class="nav-link">Become a Committer</a></li><li class="dropdown-item"><!----> <a href="/Development/ContributeGuide.html" class="nav-link">ContributeGuide</a></li><li class="dropdown-item"><!----> <a href="/Development/format-changelist.html" class="nav-link">Changelist of TsFile</a></li><li class="dropdown-item"><!----> <a href="/Development/rpc-changelist.html" class="nav-link">Changelist of RPC</a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Blog</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/Blog/Index.html" class="nav-link">Overview</a></li><li class="dropdown-item"><!----> <a href="/Blog/Release0_93.html" class="nav-link">Some Notes on Release 0.9.3 and upcoming 0.10.0</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"> |
| Foundation |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/licenses/" class="nav-link external"> |
| License |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/security/" class="nav-link external"> |
| Security |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/sponsorship.html" class="nav-link external"> |
| Sponsorship |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/foundation/thanks.html" class="nav-link external"> |
| Thanks |
| <!----></a></li><li class="dropdown-item"><!----> <a href="http://www.apache.org/events/current-event" class="nav-link external"> |
| Current Events |
| <!----></a></li></ul></div></div><div class="nav-item"><div class="dropdown-wrapper"><a class="dropdown-title"><span class="title">Languages</span> <span class="arrow right"></span></a> <ul class="nav-dropdown" style="display:none;"><li class="dropdown-item"><!----> <a href="/UserGuide/V0.9.x/5-Operation Manual/4-SQL Reference.html" class="nav-link">English</a></li><li class="dropdown-item"><!----> <a href="/zh/UserGuide/V0.9.x/5-Operation Manual/4-SQL Reference.html" class="nav-link">简体中文</a></li></ul></div></div> <a href="https://github.com/apache/incubator-iotdb.git" target="_blank" rel="noopener noreferrer" class="repo-link"> |
| gitHub |
| <svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" 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></a></nav> <ul class="sidebar-links"><li><section class="sidebar-group depth-0"><p class="sidebar-heading"><span>IoTDB User Guide (V0.9.x)</span> <!----></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>0-Get Started</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>1-Overview</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>2-Concept</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>3-Server</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>4-Client</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading open"><span>5-Operation Manual</span> <span class="arrow down"></span></p> <ul class="sidebar-links sidebar-group-items"><li><a href="/UserGuide/V0.9.x/5-Operation Manual/1-DDL Data Definition Language.html" class="sidebar-link">DDL (Data Definition Language)</a></li><li><a href="/UserGuide/V0.9.x/5-Operation Manual/2-DML Data Manipulation Language.html" class="sidebar-link">DML (Data Manipulation Language)</a></li><li><a href="/UserGuide/V0.9.x/5-Operation Manual/3-Account Management Statements.html" class="sidebar-link">Account Management Statements</a></li><li><a href="/UserGuide/V0.9.x/5-Operation Manual/4-SQL Reference.html" class="active sidebar-link">SQL Reference</a></li></ul></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>6-System Tools</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>7-Ecosystem Integration</span> <span class="arrow right"></span></p> <!----></section></li><li><section class="sidebar-group collapsable depth-0"><p class="sidebar-heading"><span>8-System Design</span> <span class="arrow right"></span></p> <!----></section></li></ul> </aside> <main class="page"> <div class="content content__default"><h1 id="sql-reference"><a href="#sql-reference" class="header-anchor">#</a> SQL Reference</h1> <p>In this part, we will introduce you IoTDB's Query Language. IoTDB offers you a SQL-like query language for interacting with IoTDB, the query language can be devided into 4 major parts:</p> <ul><li>Schema Statement: statements about schema management are all listed in this section.</li> <li>Data Management Statement: statements about data management (such as: data insertion, data query, etc.) are all listed in this section.</li> <li>Database Management Statement: statements about database management and authentication are all listed in this section.</li> <li>Functions: functions that IoTDB offers are all listed in this section.</li></ul> <p>All of these statements are write in IoTDB's own syntax, for details about the syntax composition, please check the <code>Reference</code> section.</p> <h2 id="show-version"><a href="#show-version" class="header-anchor">#</a> Show Version</h2> <div class="language-sql line-numbers-mode"><pre class="language-sql"><code><span class="token keyword">show</span> version |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>+---------------------------------------------------------------------------+ |
| | 0.9.2| |
| +---------------------------------------------------------------------------+ |
| It costs 0.001s |
| </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></div></div><h2 id="schema-statement"><a href="#schema-statement" class="header-anchor">#</a> Schema Statement</h2> <ul><li>Set Storage Group</li></ul> <div class="language-SQL line-numbers-mode"><pre class="language-sql"><code><span class="token keyword">SET</span> STORAGE <span class="token keyword">GROUP</span> <span class="token keyword">TO</span> <span class="token operator"><</span>PrefixPath<span class="token operator">></span> |
| Eg: IoTDB <span class="token operator">></span> <span class="token keyword">SET</span> STORAGE <span class="token keyword">GROUP</span> <span class="token keyword">TO</span> root<span class="token punctuation">.</span>ln<span class="token punctuation">.</span>wf01<span class="token punctuation">.</span>wt01 |
| Note: PrefixPath can <span class="token operator">not</span> include <span class="token punctuation">`</span><span class="token operator">*</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></div></div><ul><li>Delete Storage Group</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DELETE STORAGE GROUP <PrefixPath> [COMMA <PrefixPath>]* |
| Eg: IoTDB > DELETE STORAGE GROUP root.ln.wf01.wt01 |
| Eg: IoTDB > DELETE STORAGE GROUP root.ln.wf01.wt01, root.ln.wf01.wt02 |
| Note: PrefixPath can not include `*` |
| </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></div></div><ul><li>Create Timeseries Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE TIMESERIES <Timeseries> WITH <AttributeClauses> |
| AttributeClauses : DATATYPE=<DataTypeValue> COMMA ENCODING=<EncodingValue> [COMMA <ExtraAttributeClause>]* |
| DataTypeValue: BOOLEAN | DOUBLE | FLOAT | INT32 | INT64 | TEXT |
| EncodingValue: GORILLA | PLAIN | RLE | TS_2DIFF | REGULAR |
| ExtraAttributeClause: { |
| COMPRESSOR = <CompressorValue> |
| MAX_POINT_NUMBER = Integer |
| } |
| CompressorValue: UNCOMPRESSED | SNAPPY |
| Eg: IoTDB > CREATE TIMESERIES root.ln.wf01.wt01.status WITH DATATYPE=BOOLEAN, ENCODING=PLAIN |
| Eg: IoTDB > CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE |
| Eg: IoTDB > CREATE TIMESERIES root.ln.wf01.wt01.temperature WITH DATATYPE=FLOAT, ENCODING=RLE, COMPRESSOR=SNAPPY, MAX_POINT_NUMBER=3 |
| Note: Datatype and encoding type must be corresponding. Please check Chapter 3 Encoding Section for details. |
| </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><ul><li>Delete Timeseries Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DELETE TIMESERIES <PrefixPath> [COMMA <PrefixPath>]* |
| Eg: IoTDB > DELETE TIMESERIES root.ln.wf01.wt01.status |
| Eg: IoTDB > DELETE TIMESERIES root.ln.wf01.wt01.status, root.ln.wf01.wt01.temperature |
| Eg: IoTDB > DELETE TIMESERIES root.ln.wf01.wt01.* |
| </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></div></div><ul><li>Show All Timeseries Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW TIMESERIES |
| Eg: IoTDB > SHOW TIMESERIES |
| Note: This statement can only be used in IoTDB Client. If you need to show all timeseries in JDBC, please use `DataBaseMetadata` interface. |
| </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><ul><li>Show Specific Timeseries Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW TIMESERIES <Path> |
| Eg: IoTDB > SHOW TIMESERIES root |
| Eg: IoTDB > SHOW TIMESERIES root.ln |
| Eg: IoTDB > SHOW TIMESERIES root.ln.*.*.status |
| Eg: IoTDB > SHOW TIMESERIES root.ln.wf01.wt01.status |
| Note: The path can be prefix path, star path or timeseries path |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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></div></div><ul><li>Show Storage Group Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW STORAGE GROUP |
| Eg: IoTDB > SHOW STORAGE GROUP |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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><ul><li>Count Timeseries Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>COUNT TIMESERIES <Path> |
| Eg: IoTDB > COUNT TIMESERIES root |
| Eg: IoTDB > COUNT TIMESERIES root.ln |
| Eg: IoTDB > COUNT TIMESERIES root.ln.*.*.status |
| Eg: IoTDB > COUNT TIMESERIES root.ln.wf01.wt01.status |
| Note: The path can be prefix path, star path or timeseries path. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>COUNT TIMESERIES <Path> GROUP BY LEVEL=<INTEGER> |
| Eg: IoTDB > COUNT TIMESERIES root GROUP BY LEVEL=1 |
| Eg: IoTDB > COUNT TIMESERIES root.ln GROUP BY LEVEL=2 |
| Eg: IoTDB > COUNT TIMESERIES root.ln.wf01 GROUP BY LEVEL=3 |
| Note: The path can be prefix path or timeseries path. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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><ul><li>Count Nodes Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>COUNT NODES <Path> LEVEL=<INTEGER> |
| Eg: IoTDB > COUNT NODES root LEVEL=2 |
| Eg: IoTDB > COUNT NODES root.ln LEVEL=2 |
| Eg: IoTDB > COUNT NODES root.ln.wf01 LEVEL=3 |
| Note: The path can be prefix path or timeseries path. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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><ul><li>Show All Devices Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW Devices |
| Eg: IoTDB > SHOW Devices |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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><ul><li>Show Specific Devices Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW DEVICES <PrefixPath> |
| Eg: IoTDB > SHOW DEVICES root |
| Eg: IoTDB > SHOW DEVICES root.ln |
| Eg: IoTDB > SHOW DEVICES root.*.wf01 |
| Note: The path can be prefix path or star path. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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><ul><li>Show Child Paths of Root Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW CHILD PATHS |
| Eg: IoTDB > SHOW CHILD PATHS |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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><ul><li>Show Child Paths Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW CHILD PATHS <Path> |
| Eg: IoTDB > SHOW CHILD PATHS root |
| Eg: IoTDB > SHOW CHILD PATHS root.ln |
| Eg: IoTDB > SHOW CHILD PATHS root.ln.wf01 |
| Note: The path can only be prefix path. |
| Note: This statement can be used in IoTDB Client and JDBC. |
| </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><h2 id="data-management-statement"><a href="#data-management-statement" class="header-anchor">#</a> Data Management Statement</h2> <ul><li>Insert Record Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>INSERT INTO <PrefixPath> LPAREN TIMESTAMP COMMA <Sensor> [COMMA <Sensor>]* RPAREN VALUES LPAREN <TimeValue>, <PointValue> [COMMA <PointValue>]* RPAREN |
| Sensor : Identifier |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp,status) values(1509465600000,true) |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp,status) VALUES(NOW(), false) |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp,temperature) VALUES(2017-11-01T00:17:00.000+08:00,24.22028) |
| Eg: IoTDB > INSERT INTO root.ln.wf01.wt01(timestamp, status, temperature) VALUES (1509466680000, false, 20.060787); |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| Note: The order of Sensor and PointValue need one-to-one correspondence |
| </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></div></div><ul><li>Update Record Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>UPDATE <UpdateClause> SET <SetClause> WHERE <WhereClause> |
| UpdateClause: <prefixPath> |
| SetClause: <SetExpression> |
| SetExpression: <Path> EQUAL <PointValue> |
| WhereClause : <Condition> [(AND | OR) <Condition>]* |
| Condition : <Expression> [(AND | OR) <Expression>]* |
| Expression : [NOT | !]? TIME PrecedenceEqualOperator <TimeValue> |
| Eg: IoTDB > UPDATE root.ln.wf01.wt01 SET temperature = 23 WHERE time < NOW() and time > 2017-11-1T00:15:00+08:00 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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></div></div><ul><li>Delete Record Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DELETE FROM <PrefixPath> [COMMA <PrefixPath>]* WHERE TIME LESSTHAN <TimeValue> |
| Eg: DELETE FROM root.ln.wf01.wt01.temperature WHERE time < 2017-11-1T00:05:00+08:00 |
| Eg: DELETE FROM root.ln.wf01.wt01.status, root.ln.wf01.wt01.temperature WHERE time < NOW() |
| Eg: DELETE FROM root.ln.wf01.wt01.* WHERE time < 1509466140000 |
| </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></div></div><ul><li>Select Record Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> [WHERE <WhereClause>]? |
| SelectClause : <SelectPath> (COMMA <SelectPath>)* |
| SelectPath : <FUNCTION> LPAREN <Path> RPAREN | <Path> |
| FUNCTION : ‘COUNT’ , ‘MIN_TIME’, ‘MAX_TIME’, ‘MIN_VALUE’, ‘MAX_VALUE’ |
| FromClause : <PrefixPath> (COMMA <PrefixPath>)? |
| WhereClause : <Condition> [(AND | OR) <Condition>]* |
| Condition : <Expression> [(AND | OR) <Expression>]* |
| Expression : [NOT | !]? <TimeExpr> | [NOT | !]? <SensorExpr> |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| RelativeTimeDurationUnit = Integer ('Y'|'MO'|'W'|'D'|'H'|'M'|'S'|'MS'|'US'|'NS') |
| RelativeTime : (now() | <TimeValue>) [(+|-) RelativeTimeDurationUnit]+ |
| SensorExpr : (<Timeseries> | <Path>) PrecedenceEqualOperator <PointValue> |
| Eg: IoTDB > SELECT status, temperature FROM root.ln.wf01.wt01 WHERE temperature < 24 and time > 2017-11-1 0:13:00 |
| Eg. IoTDB > SELECT * FROM root |
| Eg. IoTDB > SELECT * FROM root where time > now() - 5m |
| Eg. IoTDB > SELECT COUNT(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 25 |
| Eg. IoTDB > SELECT MIN_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 25 |
| Eg. IoTDB > SELECT MAX_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature > 24 |
| Eg. IoTDB > SELECT MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature > 23 |
| Eg. IoTDB > SELECT MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 25 |
| Note: the statement needs to satisfy this constraint: <Path>(SelectClause) + <PrefixPath>(FromClause) = <Timeseries> |
| Note: If the <SensorExpr>(WhereClause) is started with <Path> and not with ROOT, the statement needs to satisfy this constraint: <PrefixPath>(FromClause) + <Path>(SensorExpr) = <Timeseries> |
| Note: In Version 0.7.0, if <WhereClause> includes `OR`, time filter can not be used. |
| Note: There must be a space on both sides of the plus and minus operator appearing in the time expression |
| </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></div></div><ul><li>Group By Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> GROUP BY <GroupByClause> |
| SelectClause : <Function> [COMMA < Function >]* |
| Function : <AggregationFunction> LPAREN <Path> RPAREN |
| FromClause : <PrefixPath> |
| WhereClause : <Condition> [(AND | OR) <Condition>]* |
| Condition : <Expression> [(AND | OR) <Expression>]* |
| Expression : [NOT | !]? <TimeExpr> | [NOT | !]? <SensorExpr> |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| RelativeTimeDurationUnit = Integer ('Y'|'MO'|'W'|'D'|'H'|'M'|'S'|'MS'|'US'|'NS') |
| RelativeTime : (now() | <TimeValue>) [(+|-) RelativeTimeDurationUnit]+ |
| SensorExpr : (<Timeseries> | <Path>) PrecedenceEqualOperator <PointValue> |
| GroupByClause : LPAREN <TimeUnit> (COMMA TimeValue)? COMMA <TimeInterval> (COMMA <TimeInterval>)* RPAREN |
| TimeUnit : Integer <DurationUnit> |
| DurationUnit : "ms" | "s" | "m" | "h" | "d" | "w" |
| TimeInterval: LBRACKET <TimeValue> COMMA <TimeValue> RBRACKET |
| Eg: SELECT COUNT(status), COUNT(temperature) FROM root.ln.wf01.wt01 where temperature < 24 GROUP BY(5m, [1509465720000, 1509466380000]) |
| Eg. SELECT COUNT (status), MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE time < 1509466500000 GROUP BY(5m, 1509465660000, [1509465720000, 1509466380000]) |
| Eg. SELECT MIN_TIME(status), MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE temperature < 25 and time < 1509466800000 GROUP BY (3m, 1509465600000, [1509466140000, 1509466380000], [1509466440000, 1509466620000]) |
| Note: the statement needs to satisfy this constraint: <Path>(SelectClause) + <PrefixPath>(FromClause) = <Timeseries> |
| Note: If the <SensorExpr>(WhereClause) is started with <Path> and not with ROOT, the statement needs to satisfy this constraint: <PrefixPath>(FromClause) + <Path>(SensorExpr) = <Timeseries> |
| Note: <TimeValue>(TimeInterval) needs to be greater than 0 |
| Note: First <TimeValue>(TimeInterval) in needs to be smaller than second <TimeValue>(TimeInterval) |
| </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></div></div><ul><li>Fill Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> WHERE <WhereClause> FILL <FillClause> |
| SelectClause : <Path> [COMMA <Path>]* |
| FromClause : < PrefixPath > [COMMA < PrefixPath >]* |
| WhereClause : <WhereExpression> |
| WhereExpression : TIME EQUAL <TimeValue> |
| FillClause : LPAREN <TypeClause> [COMMA <TypeClause>]* RPAREN |
| TypeClause : <Int32Clause> | <Int64Clause> | <FloatClause> | <DoubleClause> | <BoolClause> | <TextClause> |
| Int32Clause: INT32 LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| Int64Clause: INT64 LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| FloatClause: FLOAT LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| DoubleClause: DOUBLE LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| BoolClause: BOOLEAN LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| TextClause: TEXT LBRACKET (<LinearClause> | <PreviousClause>) RBRACKET |
| PreviousClause : PREVIOUS [COMMA <ValidPreviousTime>]? |
| LinearClause : LINEAR [COMMA <ValidPreviousTime> COMMA <ValidBehindTime>]? |
| ValidPreviousTime, ValidBehindTime: <TimeUnit> |
| TimeUnit : Integer <DurationUnit> |
| DurationUnit : "ms" | "s" | "m" | "h" | "d" | "w" |
| Eg: SELECT temperature FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL(float[previous, 1m]) |
| Eg: SELECT temperature,status FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL (float[linear, 1m, 1m], boolean[previous, 1m]) |
| Eg: SELECT temperature,status,hardware FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL (float[linear, 1m, 1m], boolean[previous, 1m], text[previous]) |
| Eg: SELECT temperature,status,hardware FROM root.ln.wf01.wt01 WHERE time = 2017-11-01T16:37:50.000 FILL (float[linear], boolean[previous, 1m], text[previous]) |
| Note: the statement needs to satisfy this constraint: <PrefixPath>(FromClause) + <Path>(SelectClause) = <Timeseries> |
| Note: Integer in <TimeUnit> needs to be greater than 0 |
| </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></div></div><ul><li>Limit Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT <SelectClause> FROM <FromClause> [WHERE <WhereClause>] [LIMIT <LIMITClause>] [SLIMIT <SLIMITClause>] |
| SelectClause : [<Path> | Function]+ |
| Function : <AggregationFunction> LPAREN <Path> RPAREN |
| FromClause : <Path> |
| WhereClause : <Condition> [(AND | OR) <Condition>]* |
| Condition : <Expression> [(AND | OR) <Expression>]* |
| Expression: [NOT|!]?<TimeExpr> | [NOT|!]?<SensorExpr> |
| TimeExpr : TIME PrecedenceEqualOperator (<TimeValue> | <RelativeTime>) |
| RelativeTimeDurationUnit = Integer ('Y'|'MO'|'W'|'D'|'H'|'M'|'S'|'MS'|'US'|'NS') |
| RelativeTime : (now() | <TimeValue>) [(+|-) RelativeTimeDurationUnit]+ |
| SensorExpr : (<Timeseries>|<Path>) PrecedenceEqualOperator <PointValue> |
| LIMITClause : <N> [OFFSETClause]? |
| N : PositiveInteger |
| OFFSETClause : OFFSET <OFFSETValue> |
| OFFSETValue : NonNegativeInteger |
| SLIMITClause : <SN> [SOFFSETClause]? |
| SN : PositiveInteger |
| SOFFSETClause : SOFFSET <SOFFSETValue> |
| SOFFSETValue : NonNegativeInteger |
| NonNegativeInteger:= ('+')? Digit+ |
| Eg: IoTDB > SELECT status, temperature FROM root.ln.wf01.wt01 WHERE temperature < 24 and time > 2017-11-1 0:13:00 LIMIT 3 OFFSET 2 |
| Eg. IoTDB > SELECT COUNT (status), MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE time < 1509466500000 GROUP BY(5m, 1509465660000, [1509465720000, 1509466380000]) LIMIT 3 |
| Note: The order of <LIMITClause> and <SLIMITClause> does not affect the grammatical correctness. |
| Note: <FillClause> can not use <LIMITClause> but not <SLIMITClause>. |
| </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></div></div><ul><li>Group By Device Statement</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>GroupbyDeviceClause : GROUP BY DEVICE |
| |
| Rules: |
| 1. Both uppercase and lowercase are ok. |
| Correct example: select * from root.sg1 group by device |
| Correct example: select * from root.sg1 GROUP BY DEVICE |
| |
| 2. GroupbyDeviceClause can only be used at the end of a query statement. |
| Correct example: select * from root.sg1 where time > 10 group by device |
| Wrong example: select * from root.sg1 group by device where time > 10 |
| |
| 3. The paths of the SELECT clause can only be single level. In other words, the paths of the SELECT clause can only be measurements or STAR, without DOT. |
| Correct example: select s0,s1 from root.sg1.* group by device |
| Correct example: select s0,s1 from root.sg1.d0, root.sg1.d1 group by device |
| Correct example: select * from root.sg1.* group by device |
| Correct example: select * from root group by device |
| Correct example: select s0,s1,* from root.*.* group by device |
| Wrong example: select d0.s1, d0.s2, d1.s0 from root.sg1 group by device |
| Wrong example: select *.s0, *.s1 from root.* group by device |
| Wrong example: select *.*.* from root group by device |
| |
| 4. The data types of the same measurement column should be the same across devices. |
| Note that when it comes to aggregated paths, the data type of the measurement column will reflect |
| the aggregation function rather than the original timeseries. |
| |
| Correct example: select s0 from root.sg1.d0,root.sg1.d1 group by device |
| root.sg1.d0.s0 and root.sg1.d1.s0 are both INT32. |
| |
| Correct example: select count(s0) from root.sg1.d0,root.sg1.d1 group by device |
| count(root.sg1.d0.s0) and count(root.sg1.d1.s0) are both INT64. |
| |
| Wrong example: select s0 from root.sg1.d0, root.sg2.d3 group by device |
| root.sg1.d0.s0 is INT32 while root.sg2.d3.s0 is FLOAT. |
| |
| 5. The display principle of the result table is that only when the column (or row) has existing data will the column (or row) be shown, with nonexistent cells being null. |
| For example, "select s0,s1,s2 from root.sg.d0, root.sg.d1, root.sg.d2 group by device". Suppose that the actual existing timeseries are as follows: |
| - root.sg.d0.s0 |
| - root.sg.d0.s1 |
| - root.sg.d1.s0 |
| |
| Then the header of the result table will be: [Time, Device, s0, s1]. |
| And you could expect a table like: |
| |
| | Time | Device | s0 | s1 | |
| | --- | --- | ---| ---| |
| | 1 |root.sg.d0| 20 | 2.5| |
| | 2 |root.sg.d0| 23 | 3.1| |
| | ... | ... | ...| ...| |
| | 1 |root.sg.d1| 12 |null| |
| | 2 |root.sg.d1| 19 |null| |
| | ... | ... | ...| ...| |
| |
| Note that the cells of measurement 's0' and device 'root.sg.d1' are all null. |
| Also note that the column of 's2' and the rows of 'root.sg.d2' are not existent. |
| |
| 6. The duplicated devices in the prefix paths are neglected. |
| For example, "select s0,s1 from root.sg.d0,root.sg.d0,root.sg.d1 group by device" is equal to "select s0,s1 from root.sg.d0,root.sg.d1 group by device". |
| For example. "select s0,s1 from root.sg.*,root.sg.d0 group by device" is equal to "select s0,s1 from root.sg.* group by device". |
| |
| 7. The duplicated measurements in the suffix paths are not neglected. |
| For example, "select s0,s0,s1 from root.sg.* group by device" is not equal to "select s0,s1 from root.sg.* group by device". |
| |
| 8. More correct examples: |
| - select * from root.vehicle group by device |
| - select s0,s0,s1 from root.vehicle.* group by device |
| - select s0,s1 from root.vehicle.* limit 10 offset 1 group by device |
| - select * from root.vehicle slimit 10 soffset 2 group by device |
| - select * from root.vehicle where time > 10 group by device |
| - select * from root.vehicle where root.vehicle.d0.s0>0 group by device |
| - select count(*) from root.vehicle group by device |
| - select sum(*) from root.vehicle GROUP BY (20ms,0,[2,50]) group by device |
| - select * from root.vehicle where time = 3 Fill(int32[previous, 5ms]) group by device |
| </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><span class="line-number">57</span><br><span class="line-number">58</span><br><span class="line-number">59</span><br><span class="line-number">60</span><br><span class="line-number">61</span><br><span class="line-number">62</span><br><span class="line-number">63</span><br><span class="line-number">64</span><br><span class="line-number">65</span><br><span class="line-number">66</span><br><span class="line-number">67</span><br><span class="line-number">68</span><br><span class="line-number">69</span><br><span class="line-number">70</span><br><span class="line-number">71</span><br><span class="line-number">72</span><br></div></div><h2 id="database-management-statement"><a href="#database-management-statement" class="header-anchor">#</a> Database Management Statement</h2> <ul><li>Create User</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE USER <userName> <password>; |
| userName:=identifier |
| password:=string |
| Eg: IoTDB > CREATE USER thulab 'pwd'; |
| </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></div></div><ul><li>Delete User</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DROP USER <userName>; |
| userName:=identifier |
| Eg: IoTDB > DROP USER xiaoming; |
| </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><ul><li>Create Role</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>CREATE ROLE <roleName>; |
| roleName:=identifie |
| Eg: IoTDB > CREATE ROLE admin; |
| </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><ul><li>Delete Role</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>DROP ROLE <roleName>; |
| roleName:=identifier |
| Eg: IoTDB > DROP ROLE admin; |
| </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><ul><li>Grant User Privileges</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>GRANT USER <userName> PRIVILEGES <privileges> ON <nodeName>; |
| userName:=identifier |
| nodeName:=identifier (DOT identifier)* |
| privileges:= string (COMMA string)* |
| Eg: IoTDB > GRANT USER tempuser PRIVILEGES 'DELETE_TIMESERIES' on root.ln; |
| </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></div></div><ul><li>Grant Role Privileges</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>GRANT ROLE <roleName> PRIVILEGES <privileges> ON <nodeName>; |
| privileges:= string (COMMA string)* |
| roleName:=identifier |
| nodeName:=identifier (DOT identifier)* |
| Eg: IoTDB > GRANT ROLE temprole PRIVILEGES 'DELETE_TIMESERIES' ON root.ln; |
| </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></div></div><ul><li>Grant User Role</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>GRANT <roleName> TO <userName>; |
| roleName:=identifier |
| userName:=identifier |
| Eg: IoTDB > GRANT temprole TO tempuser; |
| </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></div></div><ul><li>Revoke User Privileges</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>REVOKE USER <userName> PRIVILEGES <privileges> ON <nodeName>; |
| privileges:= string (COMMA string)* |
| userName:=identifier |
| nodeName:=identifier (DOT identifier)* |
| Eg: IoTDB > REVOKE USER tempuser PRIVILEGES 'DELETE_TIMESERIES' on root.ln; |
| </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></div></div><ul><li>Revoke Role Privileges</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>REVOKE ROLE <roleName> PRIVILEGES <privileges> ON <nodeName>; |
| privileges:= string (COMMA string)* |
| roleName:= identifier |
| nodeName:=identifier (DOT identifier)* |
| Eg: IoTDB > REVOKE ROLE temprole PRIVILEGES 'DELETE_TIMESERIES' ON root.ln; |
| </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></div></div><ul><li>Revoke Role From User</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>REVOKE <roleName> FROM <userName>; |
| roleName:=identifier |
| userName:=identifier |
| Eg: IoTDB > REVOKE temproleFROM tempuser; |
| </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></div></div><ul><li>List Users</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST USER |
| Eg: IoTDB > LIST USER |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>List Roles</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ROLE |
| Eg: IoTDB > LIST ROLE |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br><span class="line-number">2</span><br></div></div><ul><li>List Privileges</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST PRIVILEGES USER <username> ON <path>; |
| username:=identifier |
| path=‘root’ (DOT identifier)* |
| Eg: IoTDB > LIST PRIVIEGES USER sgcc_wirte_user ON root.sgcc; |
| </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></div></div><ul><li>List Privileges of Roles(On Specific Path)</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST PRIVILEGES ROLE <roleName> ON <path>; |
| roleName:=identifier |
| path=‘root’ (DOT identifier)* |
| Eg: IoTDB > LIST PRIVIEGES ROLE wirte_role ON root.sgcc; |
| </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></div></div><ul><li>List Privileges of Users</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST USER PRIVILEGES <username> ; |
| username:=identifier |
| Eg: IoTDB > LIST USER PRIVIEGES tempuser; |
| </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><ul><li>List Privileges of Roles</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ROLE PRIVILEGES <roleName> |
| roleName:=identifier |
| Eg: IoTDB > LIST ROLE PRIVIEGES actor; |
| </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><ul><li>List Roles of Users</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ALL ROLE OF USER <username> ; |
| username:=identifier |
| Eg: IoTDB > LIST ALL ROLE OF USER tempuser; |
| </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><ul><li>List Users of Role</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>LIST ALL USER OF ROLE <roleName>; |
| roleName:=identifier |
| Eg: IoTDB > LIST ALL USER OF ROLE roleuser; |
| </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><ul><li>Alter Password</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>ALTER USER <username> SET PASSWORD <password>; |
| roleName:=identifier |
| password:=identifier |
| Eg: IoTDB > ALTER USER tempuser SET PASSWORD 'newpwd'; |
| </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></div></div><h2 id="functions"><a href="#functions" class="header-anchor">#</a> Functions</h2> <ul><li>COUNT</li></ul> <p>The COUNT function returns the value number of timeseries(one or more) non-null values selected by the SELECT statement. The result is a signed 64-bit integer. If there are no matching rows, COUNT () returns 0.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT COUNT(Path) (COMMA COUNT(Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT COUNT(status), COUNT(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><ul><li>FIRST</li></ul> <p>The FIRST function returns the first point value of the choosen timeseries(one or more).</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT FIRST (Path) (COMMA FIRST (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT FIRST (status), FIRST (temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><ul><li>MAX_TIME</li></ul> <p>The MAX_TIME function returns the maximum timestamp of the choosen timeseries(one or more). The result is a signed 64-bit integer, greater than 0.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MAX_TIME (Path) (COMMA MAX_TIME (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MAX_TIME(status), MAX_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><ul><li>MAX_VALUE</li></ul> <p>The MAX_VALUE function returns the maximum value(lexicographically ordered) of the choosen timeseries (one or more).</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MAX_VALUE (Path) (COMMA MAX_VALUE (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MAX_VALUE(status), MAX_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><ul><li>AVG(Rename from <code>MEAN</code> at <code>V0.9.0</code>)</li></ul> <p>The AVG function returns the arithmetic mean value of the choosen timeseries over a specified period of time. The timeseries must be int32, int64, float, double type, and the other types are not to be calculated. The result is a double type number.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT AVG (Path) (COMMA AVG (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT AVG (temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><ul><li>MIN_TIME</li></ul> <p>The MIN_TIME function returns the minimum timestamp of the choosen timeseries(one or more). The result is a signed 64-bit integer, greater than 0.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MIN_TIME (Path) (COMMA MIN_TIME (Path))*FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MIN_TIME(status), MIN_TIME(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><ul><li>MIN_VALUE</li></ul> <p>The MIN_VALUE function returns the minimum value(lexicographically ordered) of the choosen timeseries (one or more).</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT MIN_VALUE (Path) (COMMA MIN_VALUE (Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT MIN_VALUE(status),MIN_VALUE(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><ul><li>NOW</li></ul> <p>The NOW function returns the current timestamp. This function can be used in the data operation statement to represent time. The result is a signed 64-bit integer, greater than 0.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>NOW() |
| Eg. INSERT INTO root.ln.wf01.wt01(timestamp,status) VALUES(NOW(), false) |
| Eg. UPDATE root.ln.wf01.wt01 SET temperature = 23 WHERE time < NOW() |
| Eg. DELETE FROM root.ln.wf01.wt01.status, root.ln.wf01.wt01.temperature WHERE time < NOW() |
| Eg. SELECT * FROM root WHERE time < NOW() |
| Eg. SELECT COUNT(temperature) FROM root.ln.wf01.wt01 WHERE time < NOW() |
| </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><ul><li>SUM</li></ul> <p>The SUM function returns the sum of the choosen timeseries (one or more) over a specified period of time. The timeseries must be int32, int64, float, double type, and the other types are not to be calculated. The result is a double type number.</p> <div class="language- line-numbers-mode"><pre class="language-text"><code>SELECT SUM(Path) (COMMA SUM(Path))* FROM <FromClause> [WHERE <WhereClause>]? |
| Eg. SELECT SUM(temperature) FROM root.ln.wf01.wt01 WHERE root.ln.wf01.wt01.temperature < 24 |
| Note: the statement needs to satisfy this constraint: <PrefixPath> + <Path> = <Timeseries> |
| </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><h2 id="ttl"><a href="#ttl" class="header-anchor">#</a> TTL</h2> <p>IoTDB supports storage-level TTL settings, which means it is able to delete old data |
| automatically and periodically. The benefit of using TTL is that hopefully you can control the |
| total disk space usage and prevent the machine from running out of disks. Moreover, the query |
| performance may downgrade as the total number of files goes up and the memory usage also increase |
| as there are more files. Timely removing such files helps to keep at a high query performance |
| level and reduce memory usage. The TTL operations in IoTDB are supported by the following three |
| statements:</p> <ul><li>Set TTL</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SET TTL TO StorageGroupName TTLTime |
| Eg. SET TTL TO root.group1 3600000 |
| This example means that for data in root.group1, only that of the latest 1 hour will remain, the |
| older one is removed or made invisible. |
| Note: TTLTime should be millisecond timestamp. When TTL is set, insertions that fall |
| out of TTL will be rejected. |
| </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><ul><li>Unset TTL</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>UNSET TTL TO StorageGroupName |
| Eg. UNSET TTL TO root.group1 |
| This example means that data of all time will be accepted in this group. |
| </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><ul><li>Show TTL</li></ul> <div class="language- line-numbers-mode"><pre class="language-text"><code>SHOW ALL TTL |
| SHOW TTL ON StorageGroupNames |
| Eg.1 SHOW ALL TTL |
| This example will show TTLs of all storage groups. |
| Eg.2 SHOW TTL ON root.group1,root.group2,root.group3 |
| This example will show TTLs of the specified 3 groups. |
| Notice: storage groups without TTL will show a "null" |
| </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></div></div><p>Notice: When you set TTL to some storage groups, data out of the TTL will be made invisible |
| immediately, but because the data files may contain both out-dated and living data or the data files may |
| be being used by queries, the physical removal of data is stale. If you increase or unset TTL |
| just after setting it previously, some previously invisible data may be seen again, but the |
| physically removed one is lost forever. In other words, different from delete statement, the |
| atomicity of data deletion is not guaranteed for efficiency concerns. So we recommend that you do |
| not change the TTL once it is set or at least do not reset it frequently, unless you are determined |
| to suffer the unpredictability.</p> <h1 id="reference"><a href="#reference" class="header-anchor">#</a> Reference</h1> <h2 id="keywords"><a href="#keywords" class="header-anchor">#</a> Keywords</h2> <div class="language- line-numbers-mode"><pre class="language-text"><code>Keywords for IoTDB (case insensitive): |
| ADD, BY, COMPRESSOR, CREATE, DATATYPE, DELETE, DESCRIBE, DROP, ENCODING, EXIT, FROM, GRANT, GROUP, LABLE, LINK, INDEX, INSERT, INTO, LOAD, MAX_POINT_NUMBER, MERGE, METADATA, ON, ORDER, PASSWORD, PRIVILEGES, PROPERTY, QUIT, REVOKE, ROLE, ROOT, SELECT, SET, SHOW, STORAGE, TIME, TIMESERIES, TIMESTAMP, TO, UNLINK, UPDATE, USER, USING, VALUE, VALUES, WHERE, WITH |
| |
| Keywords with special meanings (case insensitive): |
| * Data Types: BOOLEAN, DOUBLE, FLOAT, INT32, INT64, TEXT |
| * Encoding Methods: BITMAP, DFT, GORILLA, PLAIN, RLE, TS_2DIFF |
| * Compression Methods: UNCOMPRESSED, SNAPPY, GZIP, LZ0, ZDT, PAA, PLA |
| * Logical symbol: AND, &, &&, OR, | , ||, NOT, !, TRUE, FALSE |
| </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></div></div><h2 id="identifiers"><a href="#identifiers" class="header-anchor">#</a> Identifiers</h2> <div class="language- line-numbers-mode"><pre class="language-text"><code>QUOTE := '\''; |
| DOT := '.'; |
| COLON : ':' ; |
| COMMA := ',' ; |
| SEMICOLON := ';' ; |
| LPAREN := '(' ; |
| RPAREN := ')' ; |
| LBRACKET := '['; |
| RBRACKET := ']'; |
| EQUAL := '=' | '=='; |
| NOTEQUAL := '<>' | '!='; |
| LESSTHANOREQUALTO := '<='; |
| LESSTHAN := '<'; |
| GREATERTHANOREQUALTO := '>='; |
| GREATERTHAN := '>'; |
| DIVIDE := '/'; |
| PLUS := '+'; |
| MINUS := '-'; |
| STAR := '*'; |
| Letter := 'a'..'z' | 'A'..'Z'; |
| HexDigit := 'a'..'f' | 'A'..'F'; |
| Digit := '0'..'9'; |
| Boolean := TRUE | FALSE | 0 | 1 (case insensitive) |
| |
| </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></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>StringLiteral := ( '\'' ( ~('\'') )* '\'' | '\"' ( ~('\"') )* '\"'); |
| eg. 'abc' |
| eg. 'abc' |
| </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><div class="language- line-numbers-mode"><pre class="language-text"><code>Integer := ('-' | '+')? Digit+; |
| eg. 123 |
| eg. -222 |
| </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><div class="language- line-numbers-mode"><pre class="language-text"><code>Float := ('-' | '+')? Digit+ DOT Digit+ (('e' | 'E') ('-' | '+')? Digit+)?; |
| eg. 3.1415 |
| eg. 1.2E10 |
| eg. -1.33 |
| </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></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>Identifier := (Letter | '_') (Letter | Digit | '_' | MINUS)*; |
| eg. a123 |
| eg. _abc123 |
| |
| </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></div></div><h2 id="literals"><a href="#literals" class="header-anchor">#</a> Literals</h2> <div class="language- line-numbers-mode"><pre class="language-text"><code>PointValue : Integer | Float | StringLiteral | Boolean |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>TimeValue : Integer | DateTime | ISO8601 | NOW() |
| Note: Integer means timestamp type. |
| |
| DateTime : |
| eg. 2016-11-16T16:22:33+08:00 |
| eg. 2016-11-16 16:22:33+08:00 |
| eg. 2016-11-16T16:22:33.000+08:00 |
| eg. 2016-11-16 16:22:33.000+08:00 |
| Note: DateTime Type can support several types, see Chapter 3 Datetime section for details. |
| </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></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>PrecedenceEqualOperator : EQUAL | NOTEQUAL | LESSTHANOREQUALTO | LESSTHAN | GREATERTHANOREQUALTO | GREATERTHAN |
| </code></pre> <div class="line-numbers-wrapper"><span class="line-number">1</span><br></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>Timeseries : ROOT [DOT <LayerName>]* DOT <SensorName> |
| LayerName : Identifier |
| SensorName : Identifier |
| eg. root.ln.wf01.wt01.status |
| eg. root.sgcc.wf03.wt01.temperature |
| Note: Timeseries must be start with `root`(case insensitive) and end with sensor name. |
| </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><div class="language- line-numbers-mode"><pre class="language-text"><code>PrefixPath : ROOT (DOT <LayerName>)* |
| LayerName : Identifier | STAR |
| eg. root.sgcc |
| eg. root.* |
| </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></div></div><div class="language- line-numbers-mode"><pre class="language-text"><code>Path: (ROOT | <LayerName>) (DOT <LayerName>)* |
| LayerName: Identifier | STAR |
| eg. root.ln.wf01.wt01.status |
| eg. root.*.wf01.wt01.status |
| eg. root.ln.wf01.wt01.* |
| eg. *.wt01.* |
| eg. * |
| </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></div></div></div> <div class="page-nav"><p class="inner"><span class="prev"> |
| ← |
| <a href="/UserGuide/V0.9.x/5-Operation Manual/3-Account Management Statements.html" class="prev"> |
| Account Management Statements |
| </a></span> <span class="next"><a href="/UserGuide/V0.9.x/6-System Tools/1-Sync Tool.html"> |
| Sync Tool |
| </a> |
| → |
| </span></p></div> <p style="text-align: center;">Copyright © 2020 The Apache Software Foundation.<br> |
| Apache and the Apache feather logo are trademarks of The Apache Software Foundation</p> <p style="text-align:justify!important;paddingLeft:10px;paddingRight:10px;"> |
| Disclaimer: Apache IoTDB (incubating) is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the Apache Incubator. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF. |
| </p></main></div><div class="global-ui"></div></div> |
| <script src="/assets/js/app.aab05fb2.js" defer></script><script src="/assets/js/3.1dc302ea.js" defer></script><script src="/assets/js/201.2008406c.js" defer></script> |
| </body> |
| </html> |