expression: add keepnull flag in FieldType and use by NewFunction #19639
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XuHuaiyu
reviewed
Sep 1, 2020
expression/expression.go
Outdated
| @@ -1218,5 +1218,8 @@ func wrapWithIsTrue(ctx sessionctx.Context, keepNull bool, arg Expression, wrapF | |||
| Function: f, | |||
| RetType: f.getRetTp(), | |||
| } | |||
| if keepNull { | |||
| f.getRetTp().Flag ^= mysql.IsTureWithKeepNullFlag | |||
|
LGTM |
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What problem does this PR solve?
Issue Number: close #17720 #17476
Problem Summary: NewFunction can't get keepnull attributes for isture function.
What is changed and how it works?
Proposal: xxx
What's Changed:
How it Works:
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