cherry pick #25975 to release-5.1

Signed-off-by: ti-srebot <[email protected]>
pingcap · Jul 20, 2021 · 5f42ce3 · 5f42ce3
1 parent 40a9ad7
commit 5f42ce3
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/expression/expression.go b/expression/expression.go
@@ -1026,7 +1026,10 @@ func scalarExprSupportedByFlash(function *ScalarFunction) bool {
 		}
 	case ast.Cast:
 		switch function.Function.PbCode() {
-		case tipb.ScalarFuncSig_CastIntAsInt, tipb.ScalarFuncSig_CastIntAsReal, tipb.ScalarFuncSig_CastIntAsDecimal, tipb.ScalarFuncSig_CastIntAsString, tipb.ScalarFuncSig_CastIntAsTime,
+		case tipb.ScalarFuncSig_CastIntAsTime:
+			// ban the function of casting year type as time type pushing down to tiflash because of https://github.com/pingcap/tidb/issues/26215
+			return function.GetArgs()[0].GetType().Tp != mysql.TypeYear
+		case tipb.ScalarFuncSig_CastIntAsInt, tipb.ScalarFuncSig_CastIntAsReal, tipb.ScalarFuncSig_CastIntAsDecimal, tipb.ScalarFuncSig_CastIntAsString,
 			tipb.ScalarFuncSig_CastRealAsInt, tipb.ScalarFuncSig_CastRealAsReal, tipb.ScalarFuncSig_CastRealAsDecimal, tipb.ScalarFuncSig_CastRealAsString, tipb.ScalarFuncSig_CastRealAsTime,
 			tipb.ScalarFuncSig_CastStringAsInt, tipb.ScalarFuncSig_CastStringAsReal, tipb.ScalarFuncSig_CastStringAsDecimal, tipb.ScalarFuncSig_CastStringAsString, tipb.ScalarFuncSig_CastStringAsTime,
 			tipb.ScalarFuncSig_CastDecimalAsInt /*, tipb.ScalarFuncSig_CastDecimalAsReal*/, tipb.ScalarFuncSig_CastDecimalAsDecimal, tipb.ScalarFuncSig_CastDecimalAsString, tipb.ScalarFuncSig_CastDecimalAsTime,