tanclary commented on code in PR #3324:
URL: https://github.com/apache/calcite/pull/3324#discussion_r1268197316
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core/src/main/java/org/apache/calcite/sql/fun/SqlLibraryOperators.java:
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@@ -955,10 +955,38 @@ static RelDataType deriveTypeSplit(SqlOperatorBinding
operatorBinding,
.withKind(SqlKind.CONCAT_WS_MSSQL);
private static RelDataType arrayReturnType(SqlOperatorBinding opBinding) {
- RelDataType type =
- opBinding.getOperandCount() > 0
- ? ReturnTypes.LEAST_RESTRICTIVE.inferReturnType(opBinding)
- : opBinding.getTypeFactory().createUnknownType();
+ // only numeric & character types check
+ List<RelDataType> numericTypes = new ArrayList<>();
+ List<RelDataType> characterTypes = new ArrayList<>();
+ List<RelDataType> nullTypes = new ArrayList<>();
+ for (int i = 0; i < opBinding.getOperandCount(); i++) {
+ SqlTypeFamily family =
opBinding.getOperandType(i).getSqlTypeName().getFamily();
+ if (family == SqlTypeFamily.NUMERIC) {
Review Comment:
can this be rewritten as a switch case?
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