[SPARK-56976][SQL] Support Two-Argument IF(condition, value) Returning NULL#56025
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Richard-Durkee wants to merge 1 commit into
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[SPARK-56976][SQL] Support Two-Argument IF(condition, value) Returning NULL#56025Richard-Durkee wants to merge 1 commit into
Richard-Durkee wants to merge 1 commit into
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What changes were proposed in this pull request?
Add an auxiliary constructor to the
Ifexpression that accepts two arguments, defaultingfalseValuetoLiteral(null). This allowsIF(condition, value)to return NULL when the condition is false.Why are the changes needed?
The two-argument IF expression is supported by MySQL, Trino/Presto, and BigQuery. Users migrating queries from these systems currently get an arity error.
Does this PR introduce any user-facing change?
Yes.
IF(condition, value)now returnsvaluewhen true and NULL when false, instead of throwing an error.How was this patch tested?
New golden file SQL test (
if-two-arg.sql). Existingconditional-functions.sqlandifCoercion.sqltests pass with no regressions.Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude 4