HangyuanLiu commented on a change in pull request #2911: Support not_empty
function and empty function
URL: https://github.com/apache/incubator-doris/pull/2911#discussion_r379821918
##########
File path: be/src/exprs/string_functions.cpp
##########
@@ -99,6 +99,32 @@ BooleanVal StringFunctions::ends_with(
return BooleanVal(str_sp.ends_with(suffix_sp));
}
+BooleanVal StringFunctions::empty(
+ FunctionContext* context, const StringVal& str) {
+ if (str.is_null) {
+ return BooleanVal::null();
Review comment:
Considered non-empty if it contains at least one byte, even if this is a
space or a null byte. The function should return true or false, not null.
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