expression: use hybrid check for ANY_VALUE string eval

Author: hawkingrei

pkg/expression/builtin_miscellaneous.go

@@ -455,11 +455,11 @@ func (b *builtinIntAnyValueSig) evalInt(ctx EvalContext, row chunk.Row) (int64,
 }
 
 func (b *builtinIntAnyValueSig) evalString(ctx EvalContext, row chunk.Row) (string, bool, error) {
-	if b.tp.GetType() != mysql.TypeBit {
+	if !b.tp.Hybrid() {
 		return b.baseBuiltinFunc.evalString(ctx, row)
 	}
-	// ANY_VALUE preserves the TypeBit return field, but its primary evaluation signature is integer.
-	// String contexts still need the underlying BIT value in its binary string form.
+	// ANY_VALUE can preserve a hybrid return field while using the integer signature.
+	// String contexts still need the underlying hybrid value in its string form.
 	return b.args[0].EvalString(ctx, row)
 }
 

pkg/expression/builtin_miscellaneous_vec.go

@@ -24,7 +24,6 @@ import (
 	"time"
 
 	"github.com/google/uuid"
-	"github.com/pingcap/tidb/pkg/parser/mysql"
 	"github.com/pingcap/tidb/pkg/sessionctx/variable"
 	"github.com/pingcap/tidb/pkg/types"
 	"github.com/pingcap/tidb/pkg/util/chunk"
@@ -367,7 +366,7 @@ func (b *builtinIntAnyValueSig) vecEvalInt(ctx EvalContext, input *chunk.Chunk,
 }
 
 func (b *builtinIntAnyValueSig) vecEvalString(ctx EvalContext, input *chunk.Chunk, result *chunk.Column) error {
-	if b.tp.GetType() != mysql.TypeBit {
+	if !b.tp.Hybrid() {
 		return b.baseBuiltinFunc.vecEvalString(ctx, input, result)
 	}
 	return b.args[0].VecEvalString(ctx, input, result)