xy720 commented on code in PR #31312:
URL: https://github.com/apache/doris/pull/31312#discussion_r1504019968
##########
fe/fe-core/src/main/java/org/apache/doris/catalog/FunctionSet.java:
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@@ -495,6 +495,12 @@ public static boolean isCastMatchAllowed(Function desc,
Function candicate) {
return false;
}
}
+ if
(FunctionCallExpr.STRING_SEARCH_FUNCTION_SET.contains(desc.functionName())) {
+ if (descArgTypes[1].isStringType() &&
candicateArgTypes[1].isArrayType()) {
+ // The needles arg of search functions should not be allowed
to cast from string.
Review Comment:
because the cast function wrapped a nullable layer above the result type
when it encountered a string input.
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