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| <main class="article default-main full-800" data-ceiling="topbar"> |
| <div class="article-banner"> |
| <p>You are viewing the documentation for a prerelease version.</p> |
| </div> |
| <div class="article-header"> |
| <nav class="crumbs" aria-label="breadcrumbs"> |
| <ul> |
| <li class="crumb">Cassandra</li> |
| <li class="crumb"><a href="index.html">Getting Started</a></li> |
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| <article class="doc"> |
| <h1 class="page">Storage-attached Indexing (SAI) Quickstart</h1> |
| <div id="preamble"> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>To get started with Storage-Attached Indexing (SAI), we’ll do the following steps:</p> |
| </div> |
| <div class="ulist"> |
| <ul> |
| <li> |
| <p>Create a keyspace.</p> |
| </li> |
| <li> |
| <p>Create a table.</p> |
| </li> |
| <li> |
| <p>Create an <a href="../reference/cql-commands/create-custom-index.html" class="page">index using SAI</a>.</p> |
| </li> |
| <li> |
| <p>Add data.</p> |
| </li> |
| <li> |
| <p>Create and run a query using SAI.</p> |
| </li> |
| </ul> |
| </div> |
| <div class="paragraph"> |
| <p>The examples in this quickstart topic show SAI indexes with non-partition key columns.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="create-a-keyspace"><a class="anchor" href="#create-a-keyspace"></a>Create a keyspace</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>In <code>cqlsh</code>, define the <code>cycling</code> keyspace to try the commands in a test environment:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">CREATE KEYSPACE IF NOT EXISTS cycling |
| WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : '1' };</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="create-a-database-table"><a class="anchor" href="#create-a-database-table"></a>Create a database table</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Using <code>cqlsh</code> or the CQL Console, create a <code>cyclist_semi_pro</code> database <a href="../reference/cql-commands/create-table.html" class="page">table</a> in the <code>cycling</code> keyspace or the keyspace name of your choice:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">CREATE TABLE IF NOT EXISTS cycling.cyclist_semi_pro ( |
| id int, |
| firstname text, |
| lastname text, |
| age int, |
| affiliation text, |
| country text, |
| registration date, |
| PRIMARY KEY (id));</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="create-sai-indexes-on-the-database-table"><a class="anchor" href="#create-sai-indexes-on-the-database-table"></a>Create SAI indexes on the database table</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>To test a non-trivial query, you’ll need some SAI indexes. |
| Use <a href="../reference/cql-commands/create-custom-index.html" class="page">CREATE CUSTOM INDEX</a> commands to create SAI indexes on a few non-primary-key columns in the <code>cyclist_semi_pro</code> table:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">CREATE INDEX lastname_sai_idx ON cycling.cyclist_semi_pro (lastname) |
| USING 'sai' |
| WITH OPTIONS = {'case_sensitive': 'false', 'normalize': 'true', 'ascii': 'true'}; |
| |
| CREATE INDEX age_sai_idx ON cycling.cyclist_semi_pro (age) |
| USING 'sai'; |
| |
| CREATE INDEX country_sai_idx ON cycling.cyclist_semi_pro (country) |
| USING 'sai' |
| WITH OPTIONS = {'case_sensitive': 'false', 'normalize': 'true', 'ascii': 'true'}; |
| |
| CREATE INDEX registration_sai_idx ON cycling.cyclist_semi_pro (registration) |
| USING 'sai';</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Let’s take a look at the description of the table and its indexes:</p> |
| </div> |
| <div class="tabset is-loading"> |
| <div class="ulist tabs"> |
| <ul> |
| <li> |
| <p><a id="tabset1_query"></a>Query</p> |
| </li> |
| <li> |
| <p><a id="tabset1_result"></a>Result</p> |
| </li> |
| </ul> |
| </div> |
| <div class="content"> |
| <div class="tab-pane" aria-labelledby="tabset1_query"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">DESCRIBE TABLE cycling.cyclist_semi_pro;</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="tab-pane" aria-labelledby="tabset1_result"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">CREATE TABLE cycling.cyclist_semi_pro ( |
| id int PRIMARY KEY, |
| affiliation text, |
| age int, |
| country text, |
| firstname text, |
| lastname text, |
| registration date |
| ) WITH additional_write_policy = '99PERCENTILE' |
| AND bloom_filter_fp_chance = 0.01 |
| AND caching = {'keys': 'ALL', 'rows_per_partition': 'NONE'} |
| AND comment = '' |
| AND compaction = {'class': 'org.apache.cassandra.db.compaction.SizeTieredCompactionStrategy', 'max_threshold': '32', 'min_threshold': '4'} |
| AND compression = {'chunk_length_in_kb': '64', 'class': 'org.apache.cassandra.io.compress.LZ4Compressor'} |
| AND crc_check_chance = 1.0 |
| AND default_time_to_live = 0 |
| AND gc_grace_seconds = 864000 |
| AND max_index_interval = 2048 |
| AND memtable_flush_period_in_ms = 0 |
| AND min_index_interval = 128 |
| AND nodesync = {'enabled': 'true', 'incremental': 'true'} |
| AND read_repair = 'BLOCKING' |
| AND speculative_retry = '99PERCENTILE'; |
| CREATE INDEX registration_sai_idx ON cycling.cyclist_semi_pro (registration) USING 'sai'; |
| CREATE INDEX country_sai_idx ON cycling.cyclist_semi_pro (country) USING 'sai' WITH OPTIONS = {'normalize': 'true', 'case_sensitive': 'false', 'ascii': 'true'}; |
| CREATE INDEX age_sai_idx ON cycling.cyclist_semi_pro (age) USING 'sai'; |
| CREATE INDEX lastname_sai_idx ON cycling.cyclist_semi_pro (lastname) USING 'sai' WITH OPTIONS = {'normalize': 'true', 'case_sensitive': 'false', 'ascii': 'true'};</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="add-data-to-your-table"><a class="anchor" href="#add-data-to-your-table"></a>Add data to your table</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Use CQLSH <code>INSERT</code> commands to add some data to the <code>cyclist_semi_pro</code> database table:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (1, 'Carlos', 'Perotti', 22, 'Recco Club', 'ITA', '2020-01-12'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (2, 'Giovani', 'Pasi', 19, 'Venezia Velocità', 'ITA', '2016-05-15'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (3, 'Frances', 'Giardello', 24, 'Menaggio Campioni', 'ITA', '2018-07-29'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (4, 'Mark', 'Pastore', 19, 'Portofino Ciclisti', 'ITA', '2017-06-16'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (5, 'Irene', 'Cantona', 24, 'Como Velocità', 'ITA', '2012-07-22'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (6, 'Hugo', 'Herrera', 23, 'Bellagio Ciclisti', 'ITA', '2004-02-12'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (7, 'Marcel', 'Silva', 21, 'Paris Cyclistes', 'FRA', '2018-04-28'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (8, 'Theo', 'Bernat', 19, 'Nice Cavaliers', 'FRA', '2007-05-15'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (9, 'Richie', 'Draxler', 24, 'Normandy Club', 'FRA', '2011-02-26'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (10, 'Agnes', 'Cavani', 22, 'Chamonix Hauteurs', 'FRA', '2020-01-02'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (11, 'Pablo', 'Verratti', 19, 'Chamonix Hauteurs', 'FRA', '2006-05-15'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (12, 'Charles', 'Eppinger', 24, 'Chamonix Hauteurs', 'FRA', '2018-07-29'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (13, 'Stanley', 'Trout', 30, 'Bolder Boulder', 'USA', '2016-02-12'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (14, 'Juan', 'Perez', 31, 'Rutgers Alumni Riders', 'USA', '2017-06-16'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (15, 'Thomas', 'Fulton', 27, 'Exeter Academy', 'USA', '2012-12-15'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (16, 'Jenny', 'Hamler', 28, 'CU Alums Crankworkz', 'USA', '2012-07-22'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (17, 'Alice', 'McCaffrey', 26, 'Pennan Power', 'GBR', '2020-02-12'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (18, 'Nicholas', 'Burrow', 26, 'Aberdeen Association', 'GBR', '2016-02-12'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (19, 'Tyler', 'Higgins', 24, 'Highclere Agents', 'GBR', '2019-07-31'); |
| INSERT INTO cycling.cyclist_semi_pro (id, firstname, lastname, age, affiliation, country, registration) VALUES (20, 'Leslie', 'Boyd', 18, 'London Cyclists', 'GBR', '2012-12-15');</code></pre> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Adding data in this quickstart topic shows simple <code>INSERT</code> commands. |
| To load databases with many rows, consider using <a href="https://docs.datastax.com/en/dsbulk/doc/index.html">DataStax Bulk Loader for Apache Cassandra</a>.</p> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="try-out-cql-queries"><a class="anchor" href="#try-out-cql-queries"></a>Try out CQL queries</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>Use the CQLSH <code>SELECT</code> command to submit queries.</p> |
| </div> |
| <div class="admonitionblock tip"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <i class="fa icon-tip" title="Tip"></i> |
| </td> |
| <td class="content"> |
| <div class="paragraph"> |
| <p>The supported query operators for tables with SAI indexes: |
| * Numerics: <code>=</code>, <code><</code>, <code>></code>, <code>⇐</code>, <code>>=</code>, <code>AND</code>, <code>OR</code>, <code>IN</code> |
| * Strings: <code>=</code>, <code>CONTAINS</code>, <code>CONTAINS KEY</code>, <code>AND</code>, <code>OR</code>, <code>IN</code> |
| * Strings or Numerics: <code>LIKE</code></p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| <div class="paragraph"> |
| <p>Find a specific semi-pro cyclist:</p> |
| </div> |
| <div class="tabset is-loading"> |
| <div class="ulist tabs"> |
| <ul> |
| <li> |
| <p><a id="tabset2_query"></a>Query</p> |
| </li> |
| <li> |
| <p><a id="tabset2_result"></a>Result</p> |
| </li> |
| </ul> |
| </div> |
| <div class="content"> |
| <div class="tab-pane" aria-labelledby="tabset2_query"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">SELECT * FROM cycling.cyclist_semi_pro WHERE lastname = 'Eppinger';</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="tab-pane" aria-labelledby="tabset2_result"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-console hljs" data-lang="console"> id | affiliation | age | country | firstname | lastname | registration |
| ----+-------------------+-----+---------+-----------+----------+-------------- |
| 12 | Chamonix Hauteurs | 24 | FRA | Charles | Eppinger | 2018-07-29 |
| |
| (1 rows)</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Find semi-pro cyclists whose age is less than or equal to 23:</p> |
| </div> |
| <div class="tabset is-loading"> |
| <div class="ulist tabs"> |
| <ul> |
| <li> |
| <p><a id="tabset3_query"></a>Query</p> |
| </li> |
| <li> |
| <p><a id="tabset3_result"></a>Result</p> |
| </li> |
| </ul> |
| </div> |
| <div class="content"> |
| <div class="tab-pane" aria-labelledby="tabset3_query"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">SELECT * FROM cycling.cyclist_semi_pro WHERE age <= 23;</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="tab-pane" aria-labelledby="tabset3_result"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-console hljs" data-lang="console"> id | affiliation | age | country | firstname | lastname | registration |
| ----+--------------------+-----+---------+-----------+----------+-------------- |
| 10 | Chamonix Hauteurs | 22 | FRA | Agnes | Cavani | 2020-01-02 |
| 11 | Chamonix Hauteurs | 19 | FRA | Pablo | Verratti | 2006-05-15 |
| 1 | Recco Club | 22 | ITA | Carlos | Perotti | 2020-01-12 |
| 8 | Nice Cavaliers | 19 | FRA | Theo | Bernat | 2007-05-15 |
| 2 | Venezia Velocità | 19 | ITA | Giovani | Pasi | 2016-05-15 |
| 4 | Portofino Ciclisti | 19 | ITA | Mark | Pastore | 2017-06-16 |
| 20 | London Cyclists | 18 | GBR | Leslie | Boyd | 2012-12-15 |
| 7 | Paris Cyclistes | 21 | FRA | Marcel | Silva | 2018-04-28 |
| 6 | Bellagio Ciclisti | 23 | ITA | Hugo | Herrera | 2004-02-12 |
| |
| (9 rows)</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Find semi-pro cyclists from Great Britain:</p> |
| </div> |
| <div class="tabset is-loading"> |
| <div class="ulist tabs"> |
| <ul> |
| <li> |
| <p><a id="tabset4_query"></a>Query</p> |
| </li> |
| <li> |
| <p><a id="tabset4_result"></a>Result</p> |
| </li> |
| </ul> |
| </div> |
| <div class="content"> |
| <div class="tab-pane" aria-labelledby="tabset4_query"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">SELECT * FROM cycling.cyclist_semi_pro WHERE country = 'GBR';</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="tab-pane" aria-labelledby="tabset4_result"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-console hljs" data-lang="console"> id | affiliation | age | country | firstname | lastname | registration |
| ----+----------------------+-----+---------+-----------+-----------+-------------- |
| 19 | Highclere Agents | 24 | GBR | Tyler | Higgins | 2019-07-31 |
| 18 | Aberdeen Association | 26 | GBR | Nicholas | Burrow | 2016-02-12 |
| 20 | London Cyclists | 18 | GBR | Leslie | Boyd | 2012-12-15 |
| 17 | Pennan Power | 26 | GBR | Alice | McCaffrey | 2020-02-12 |
| |
| (4 rows)</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="paragraph"> |
| <p>Find semi-pro cyclists who registered between a given date range:</p> |
| </div> |
| <div class="tabset is-loading"> |
| <div class="ulist tabs"> |
| <ul> |
| <li> |
| <p><a id="tabset5_query"></a>Query</p> |
| </li> |
| <li> |
| <p><a id="tabset5_result"></a>Result</p> |
| </li> |
| </ul> |
| </div> |
| <div class="content"> |
| <div class="tab-pane" aria-labelledby="tabset5_query"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">SELECT * FROM cycling.cyclist_semi_pro WHERE registration > '2010-01-01' AND registration < '2015-12-31' LIMIT 10;</code></pre> |
| </div> |
| </div> |
| </div> |
| <div class="tab-pane" aria-labelledby="tabset5_result"> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-results hljs" data-lang="results"> id | affiliation | age | country | firstname | lastname | registration |
| ----+---------------------+-----+---------+-----------+----------+-------------- |
| 5 | Como Velocità | 24 | ITA | Irene | Cantona | 2012-07-22 |
| 16 | CU Alums Crankworkz | 28 | USA | Jenny | Hamler | 2012-07-22 |
| 15 | Exeter Academy | 27 | USA | Thomas | Fulton | 2012-12-15 |
| 20 | London Cyclists | 18 | GBR | Leslie | Boyd | 2012-12-15 |
| 9 | Normandy Club | 24 | FRA | Richie | Draxler | 2011-02-26 |
| |
| (5 rows)</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="admonitionblock tip"> |
| <table> |
| <tr> |
| <td class="icon"> |
| <i class="fa icon-tip" title="Tip"></i> |
| </td> |
| <td class="content"> |
| <div class="paragraph"> |
| <p>For query examples with <code>CONTAINS</code> clauses that take advantage of SAI collection maps, lists, and sets, be sure to see <a href="../developing/cql/indexing/sai/collections.html" class="page">SAI collection map examples with keys, values, and entries</a>.</p> |
| </div> |
| </td> |
| </tr> |
| </table> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="removing-an-sai-index"><a class="anchor" href="#removing-an-sai-index"></a>Removing an SAI index</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p>To remove an SAI index, use <code>DROP INDEX</code>.</p> |
| </div> |
| <div class="paragraph"> |
| <p>Example:</p> |
| </div> |
| <div class="listingblock"> |
| <div class="content"> |
| <pre class="highlightjs highlight"><code class="language-language-cql hljs" data-lang="language-cql">DROP INDEX IF EXISTS cycling.age_sai_idx;</code></pre> |
| </div> |
| </div> |
| </div> |
| </div> |
| <div class="sect1"> |
| <h2 id="resources"><a class="anchor" href="#resources"></a>Resources</h2> |
| <div class="sectionbody"> |
| <div class="paragraph"> |
| <p><a href="../developing/cql/indexing/sai/sai-overview.html" class="page">SAI overview</a></p> |
| </div> |
| </div> |
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