morrySnow commented on code in PR #49416:
URL: https://github.com/apache/doris/pull/49416#discussion_r2011265657
##########
regression-test/suites/nereids_p0/expression/fold_constant/fold_constant_string_arithmatic.groovy:
##########
@@ -1723,5 +1723,13 @@ suite("fold_constant_string_arithmatic") {
testFoldConst("select split_by_string('a😁a😁a', '')")
testFoldConst("select character_length('a😁a😁a')")
testFoldConst("select replace_empty('a😁a😁a', '', '2')")
+
+ // bug_fix
+ testFoldConst("select concat(substr('2025-03-20',1,4)-1,'-01-01')")
+ testFoldConst("select concat(substr('2025-03-20',1,4)-1.0,'-01-01')")
+ testFoldConst("select concat(substr('2025-03-20',1,4)+1.0,'-01-01')")
+ testFoldConst("select concat(substr('2025-03-20',1,4)-0.5,'-01-01')")
+ testFoldConst("select cast(cast(2025.00 as double) as string)")
+ testFoldConst("select cast(cast(2025.00 as float) as string)")
Review Comment:
seems BE has too many different behavior with MySQL when the number is
precision overflow, maybe we do not need check this situation
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