mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-08 15:31:57 +00:00
108 lines
2.2 KiB
SQL
108 lines
2.2 KiB
SQL
-- Tests that match() utilizes the inverted index
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SET allow_experimental_full_text_index = true;
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DROP TABLE IF EXISTS tab;
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CREATE TABLE tab
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(
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id UInt32,
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str String,
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INDEX inv_idx(str) TYPE full_text(0) GRANULARITY 1
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)
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ENGINE = MergeTree
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ORDER BY id
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SETTINGS index_granularity = 1;
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INSERT INTO tab VALUES (1, 'Well, Hello ClickHouse !'), (2, 'Well, Hello World !'), (3, 'Good Weather !'), (4, 'Say Hello !'), (5, 'Its An OLAP Database'), (6, 'True World Champion');
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SELECT * FROM tab WHERE match(str, ' Hello (ClickHouse|World) ') ORDER BY id;
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-- Read 2/6 granules
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-- Required string: ' Hello '
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-- Alternatives: ' Hello ClickHouse ', ' Hello World '
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SELECT *
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FROM
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(
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EXPLAIN PLAN indexes=1
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SELECT * FROM tab WHERE match(str, ' Hello (ClickHouse|World) ') ORDER BY id
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)
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WHERE
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explain LIKE '%Granules: %'
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SETTINGS
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allow_experimental_analyzer = 0;
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SELECT *
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FROM
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(
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EXPLAIN PLAN indexes=1
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SELECT * FROM tab WHERE match(str, ' Hello (ClickHouse|World) ') ORDER BY id
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)
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WHERE
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explain LIKE '%Granules: %'
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SETTINGS
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allow_experimental_analyzer = 1;
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SELECT '---';
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SELECT * FROM tab WHERE match(str, '.* (ClickHouse|World) ') ORDER BY id;
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-- Read 3/6 granules
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-- Required string: -
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-- Alternatives: ' ClickHouse ', ' World '
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SELECT *
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FROM
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(
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EXPLAIN PLAN indexes = 1
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SELECT * FROM tab WHERE match(str, '.* (ClickHouse|World) ') ORDER BY id
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)
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WHERE
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explain LIKE '%Granules: %'
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SETTINGS
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allow_experimental_analyzer = 0;
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SELECT *
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FROM
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(
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EXPLAIN PLAN indexes = 1
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SELECT * FROM tab WHERE match(str, '.* (ClickHouse|World) ') ORDER BY id
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)
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WHERE
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explain LIKE '%Granules: %'
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SETTINGS
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allow_experimental_analyzer = 1;
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SELECT '---';
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SELECT * FROM tab WHERE match(str, ' OLAP .*') ORDER BY id;
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-- Read 1/6 granules
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-- Required string: ' OLAP '
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-- Alternatives: -
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SELECT *
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FROM
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(
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EXPLAIN PLAN indexes = 1
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SELECT * FROM tab WHERE match(str, ' OLAP (.*?)*') ORDER BY id
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)
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WHERE
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explain LIKE '%Granules: %'
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SETTINGS
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allow_experimental_analyzer = 0;
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SELECT *
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FROM
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(
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EXPLAIN PLAN indexes = 1
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SELECT * FROM tab WHERE match(str, ' OLAP (.*?)*') ORDER BY id
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)
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WHERE
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explain LIKE '%Granules: %'
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SETTINGS
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allow_experimental_analyzer = 1;
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DROP TABLE tab;
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