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vmware-archive / sql-to-dbsp-compiler

Compiler translating SQL view definitions into DBSP circuits (https://github.com/vmware/database-stream-processor)
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Buggy calcite optimization rule #148

Open mihaibudiu opened 1 year ago

mihaibudiu commented 1 year ago

The rule CoreRules.PROJECT_JOIN_TRANSPOSE is unsound and should not be used by the optimizer. Have to find a way to create an easy reproduction for the Calcite project. With this rule the following query from SLT select2.test produces incorrect results:

SELECT abs(b-c),
       a+b*2+c*3,
       (SELECT count(*) FROM t1 AS x WHERE x.b<t1.b),
       a-b,
       a+b*2+c*3+d*4+e*5,
       CASE WHEN a<b-3 THEN 111 WHEN a<=b THEN 222
        WHEN a<b+3 THEN 333 ELSE 444 END
  FROM t1