caicancai commented on code in PR #3998:
URL: https://github.com/apache/calcite/pull/3998#discussion_r1792071521
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core/src/main/java/org/apache/calcite/sql/validate/implicit/TypeCoercionImpl.java:
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@@ -292,16 +292,17 @@ protected boolean binaryArithmeticWithStrings(
}
RelDataType commonType;
- if (SqlTypeUtil.sameNamedType(type1, type2)) {
+ // First check when one of the types is a string (see JavaDoc on
cmmonTypeForBinaryComparison)
+ commonType = commonTypeForBinaryComparison(type1, type2);
+ if (commonType == null && SqlTypeUtil.isComparable(type1, type2)) {
Review Comment:
I have always been confused about the usage of Calcite's
`SqlTypeUtil.isComparable`
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