hongyu guo created CALCITE-5852:
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Summary: Enhance for MERGE INTO statement
Key: CALCITE-5852
URL: https://issues.apache.org/jira/browse/CALCITE-5852
Project: Calcite
Issue Type: Improvement
Reporter: hongyu guo
In Calcite, MERGE INTO statement:
{code:sql}
merge:
MERGE INTO tablePrimary [ [ AS ] alias ]
USING tablePrimary
ON booleanExpression
[ WHEN MATCHED THEN UPDATE SET assign [, assign ]* ]
[ WHEN NOT MATCHED THEN INSERT VALUES '(' value [ , value ]* ')' ]
{code}
SQL-2011 and postgres support for <merge when clause>:
{code:sql}
-- when matched clause
WHEN MATCHED [ AND <search condition> ]
THEN <merge update or delete specification>
-- when not matched clause
WHEN NOT MATCHED [ AND <search condition> ]
THEN <merge insert specification>
{code}
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