Support the CARDINALITY() SQL function#4074
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Please address the Teamscale warnings before merge, rest looks good to me!
Introduce a SQL function CARDINALITY() to return the number of elements in an array. The return type is INTEGER (not LONG), which is aligned with the type of array subscripts. CARDINALITY() cannot yet be used in an index definition. Attempting to do so results in a `RelationalException` with the message "Unsupported index definition, not all fields can be mapped to key expression". Testing: * Integration tests in `arrays_cardinality.yamsql`. * Unit tests in `CardinalityValueTest.java`.
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📊 Metrics Diff Analysis ReportSummary
ℹ️ About this analysisThis automated analysis compares query planner metrics between the base branch and this PR. It categorizes changes into:
The last category in particular may indicate planner regressions that should be investigated. New QueriesCount of new queries by file:
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Introduce a SQL function CARDINALITY() to return the number of elements in an array. The return type is INTEGER (not LONG), which is aligned with the type of array subscripts.
CARDINALITY() cannot yet be used in an index definition. Attempting to do so results in a
RelationalExceptionwith the message "Unsupported index definition, not all fields can be mapped to key expression".Testing:
arrays_cardinality.yamsql.CardinalityValueTest.java.