[GitHub] [incubator-doris] kangkaisen commented on pull request #4666: Fix Windows function lag()/lead() function throw AnalysisException.

[GitBox]

kangkaisen commented on pull request #4666:
URL: https://github.com/apache/incubator-doris/pull/4666#issuecomment-699622904


   I think a more simple way to fix this issue is:
   
   ```
        @Override
        protected Expr uncheckedCastTo(Type targetType) throws 
AnalysisException {
   -        if (targetType.isFloatingPointType()) {
   +        if (targetType.isDecimal() || targetType.isDecimalV2()) {
   +            return this;
   +        } else if (targetType.isFloatingPointType()) {
   
   @@ -769,7 +749,9 @@ public class FunctionSet {
            final Type[] candicateArgTypes = candicate.getArgs();
            if (functionName.equalsIgnoreCase("hex")
                    || functionName.equalsIgnoreCase("greast")
   -                || functionName.equalsIgnoreCase("least")) {
   +                || functionName.equalsIgnoreCase("least")
   +                || functionName.equalsIgnoreCase("lead")
   +                || functionName.equalsIgnoreCase("lag")) {
   ```
   My fixed way has been passed a lot of tests.


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