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planner: Fix the problem that PlanBuilder.buildWindowFunctions may change sub operator's schema. (#27176) #27203

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Aug 13, 2021
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planner: Fix the problem that PlanBuilder.buildWindowFunctions may change sub operator's schema. (#27176) #27203

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2 changes: 1 addition & 1 deletion expression/aggregation/base_func.go
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Original file line number Diff line number Diff line change
Expand Up @@ -434,7 +434,7 @@ func (a *baseFuncDesc) WrapCastForAggArgs(ctx sessionctx.Context) {
if col, ok := a.Args[i].(*expression.Column); ok {
col.RetType = types.NewFieldType(col.RetType.Tp)
}
// originTp is used when the the `Tp` of column is TypeFloat32 while
// originTp is used when the `Tp` of column is TypeFloat32 while
// the type of the aggregation function is TypeFloat64.
originTp := a.Args[i].GetType().Tp
*(a.Args[i].GetType()) = *(a.RetTp)
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4 changes: 2 additions & 2 deletions planner/core/logical_plan_builder.go
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Original file line number Diff line number Diff line change
Expand Up @@ -5187,7 +5187,7 @@ func (b *PlanBuilder) buildProjectionForWindow(ctx context.Context, p LogicalPla
p = np
switch newArg.(type) {
case *expression.Column, *expression.Constant:
newArgList = append(newArgList, newArg)
newArgList = append(newArgList, newArg.Clone())
continue
}
proj.Exprs = append(proj.Exprs, newArg)
Expand Down Expand Up @@ -5219,7 +5219,7 @@ func (b *PlanBuilder) buildArgs4WindowFunc(ctx context.Context, p LogicalPlan, a
p = np
switch newArg.(type) {
case *expression.Column, *expression.Constant:
newArgList = append(newArgList, newArg)
newArgList = append(newArgList, newArg.Clone())
continue
}
col := &expression.Column{
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