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thevar1able/ClickHouse

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return fake create query when executing `show create table` on system's tables. (#31391) * clarify that cannot show create table of system's tables * clarify that cannot show create table of system's tables in the document * bypass test style-check for required `database=currentDatabase()` because `show create table` do not have condition * rename supportsShowCreateTable to isSystemStorage * build fake create query for show create table of system's tables * fix tests for show create table on system's table: 1. only build fake create query when cannot get real query 2. only test rocksdb when it's enabled. * fix test for show create table system.tables * fix test for ASTCreateQuery set table and database * change to LOGICAL_ERROR when cannot get in_memory metadata Co-authored-by: tavplubix <tavplubix@gmail.com> * implement common getCreateQueryFromStorage Co-authored-by: tavplubix <tavplubix@gmail.com>

2021-11-19 10:25:55 +00:00

CREATE TABLE system.rocksdb\n(\n    `database` String,\n    `table` String,\n    `name` String,\n    `value` UInt64\n)\nENGINE = SystemRocksDB()\nCOMMENT \'SYSTEM TABLE is built on the fly.\'