xuzifu666 commented on code in PR #5164:
URL: https://github.com/apache/calcite/pull/5164#discussion_r3733931155
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testkit/src/main/java/org/apache/calcite/test/SqlOperatorTest.java:
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@@ -16159,6 +16159,9 @@ void testTimestampDiff(boolean coercionEnabled) {
f.checkType("covar_pop(CAST(NULL AS INTEGER),CAST(NULL AS INTEGER))",
"INTEGER");
f.checkAggType("covar_pop(1.5, 2.5)", "DECIMAL(2, 1) NOT NULL");
+ // [CALCITE-7696] Result type is the least restrictive of the two
+ // argument types, not the type of the first argument
+ f.checkAggType("covar_pop(1, cast(2 as double))", "DOUBLE NOT NULL");
Review Comment:
I think these changes are fine.
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