morrySnow commented on code in PR #50142:
URL: https://github.com/apache/doris/pull/50142#discussion_r2049173372
##########
fe/fe-core/src/main/java/org/apache/doris/nereids/util/TypeCoercionUtils.java:
##########
@@ -153,6 +155,25 @@ public class TypeCoercionUtils {
private static final Logger LOG =
LogManager.getLogger(TypeCoercionUtils.class);
+ /**
+ * ensure the result's data type equals to the originExpr's dataType
+ */
+ public static Expression ensureSameResultType(
+ Expression originExpr, Expression result, ExpressionRewriteContext
context) {
+ DataType originDataType = originExpr.getDataType();
+ DataType newDataType = result.getDataType();
+ if (originDataType.equals(newDataType)) {
+ return result;
+ }
+ // backend can direct use all string like type without cast
+ if (originDataType.isStringLikeType() &&
newDataType.isStringLikeType()) {
+ return result;
+ }
+ return FoldConstantRuleOnFE.PATTERN_MATCH_INSTANCE.visitCast(
Review Comment:
functio name should related to constant folding
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