THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Because each engine has its own personalized auxiliary sql statements features, here are some common operations listed as much as possible, and compare what other unrealized abilities of flink.
We focus on standard sql, but also consider absorbing the syntax of some mature engines to let users know that this is not standard, just for better use (e.g. ILIKE).
show catalogs
Engine | Support or Not, If support show the syntax |
Flink | SHOW CATALOGS |
Spark | No |
Hive | No |
Presto | SHOW CATALOGS [ LIKE pattern ] |
MySQL | No |
SnowFlake | No |
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We can see many popular engines have filtering with show statements, support 'FROM/IN' or 'LIKE/ILIKE' filter clause except flink.
And currently flink only supports describing tables.So we proposed this FLIP. And also some unique statements such as show jars/show modules in flink can also support this feature.
So we proposed this FLIP.
Proposed Syntax Changes:
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Because calcite already support parse ILIKE and exist SqlLikeOperator(NonStandardSqlLibraryOperators.ILIKE, not std operator). We just need to support it in table & sql api.
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