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93 lines
2.3 KiB
SQL
93 lines
2.3 KiB
SQL
-- Tags: no-parallel
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-- no-parallel: creates a custom database schema and expects to use it exclusively
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-- Create a test table and verify that the output of SHOW COLUMNS is sane.
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-- The matching of actual/expected results relies on the fact that the output of SHOW COLUMNS is sorted.
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DROP TABLE IF EXISTS tab;
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CREATE TABLE tab
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(
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`uint64` UInt64,
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`int32` Nullable(Int32) COMMENT 'example comment',
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`str` String,
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INDEX idx str TYPE set(1000)
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)
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ENGINE = MergeTree
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PRIMARY KEY (uint64)
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ORDER BY (uint64, str);
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SELECT '--- Aliases of SHOW COLUMNS';
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SHOW COLUMNS FROM tab;
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SHOW FIELDS FROM tab;
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SELECT '--- EXTENDED';
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SHOW EXTENDED COLUMNS FROM tab;
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SELECT '--- FULL';
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SHOW FULL COLUMNS FROM tab;
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SELECT '--- LIKE';
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SHOW COLUMNS FROM tab LIKE '%int%';
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SELECT '--- NOT LIKE';
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SHOW COLUMNS FROM tab NOT LIKE '%int%';
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SELECT '--- ILIKE';
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SHOW COLUMNS FROM tab ILIKE '%INT%';
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SELECT '--- NOT ILIKE';
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SHOW COLUMNS FROM tab NOT ILIKE '%INT%';
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SELECT '--- WHERE';
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SHOW COLUMNS FROM tab WHERE field LIKE '%int%';
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SELECT '--- LIMIT';
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SHOW COLUMNS FROM tab LIMIT 1;
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SELECT '--- Check with weird table names';
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DROP TABLE IF EXISTS `$4@^7`;
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CREATE TABLE `$4@^7` (c String) ENGINE = MergeTree ORDER BY c;
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SHOW COLUMNS FROM `$4@^7`;
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DROP TABLE `$4@^7`;
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DROP TABLE IF EXISTS NULL;
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CREATE TABLE NULL (c String) ENGINE = MergeTree ORDER BY c;
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SHOW COLUMNS FROM NULL;
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DROP TABLE NULL;
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DROP DATABASE IF EXISTS `'`;
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CREATE DATABASE `'`;
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CREATE TABLE `'`.`'` (c String) ENGINE = MergeTree ORDER BY c;
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SHOW COLUMNS FROM `'` FROM `'`;
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SHOW COLUMNS FROM `'`.`'`; -- abbreviated form
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DROP TABLE `'`.`'`;
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DROP DATABASE `'`;
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-- Create a table in a different database. Intentionally useing the same table/column names as above so
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-- we notice if something is buggy in the implementation of SHOW COLUMNS.
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DROP DATABASE IF EXISTS database_123456789abcde;
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CREATE DATABASE database_123456789abcde; -- pseudo-random database name
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DROP TABLE IF EXISTS database_123456789abcde.tab;
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CREATE TABLE database_123456789abcde.tab
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(
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`uint64` UInt64,
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`int32` Int32,
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`str` String
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)
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ENGINE = MergeTree
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ORDER BY uint64;
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SELECT '--- Original table';
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SHOW COLUMNS FROM tab;
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SELECT '--- Equally named table in other database';
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SHOW COLUMNS FROM tab FROM database_123456789abcde;
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SELECT '--- Short form';
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SHOW COLUMNS FROM database_123456789abcde.tab;
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DROP DATABASE database_123456789abcde;
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DROP TABLE tab;
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