*: disable insert null to not-null column for single-row insertion in…

… non-strict mode (#55477)

close #55457, close #56381

pkg/ddl/reorg.go

@@ -257,8 +257,9 @@ func reorgTypeFlagsWithSQLMode(mode mysql.SQLMode) types.Flags {
 
 func reorgErrLevelsWithSQLMode(mode mysql.SQLMode) errctx.LevelMap {
 	return errctx.LevelMap{
-		errctx.ErrGroupTruncate: errctx.ResolveErrLevel(false, !mode.HasStrictMode()),
-		errctx.ErrGroupBadNull:  errctx.ResolveErrLevel(false, !mode.HasStrictMode()),
+		errctx.ErrGroupTruncate:  errctx.ResolveErrLevel(false, !mode.HasStrictMode()),
+		errctx.ErrGroupBadNull:   errctx.ResolveErrLevel(false, !mode.HasStrictMode()),
+		errctx.ErrGroupNoDefault: errctx.ResolveErrLevel(false, !mode.HasStrictMode()),
 		errctx.ErrGroupDividedByZero: errctx.ResolveErrLevel(
 			!mode.HasErrorForDivisionByZeroMode(),
 			!mode.HasStrictMode(),

pkg/errctx/context.go

@@ -196,6 +196,8 @@ const (
 	ErrGroupDupKey
 	// ErrGroupBadNull is the group of bad null errors
 	ErrGroupBadNull
+	// ErrGroupNoDefault is the group of no default value errors
+	ErrGroupNoDefault
 	// ErrGroupDividedByZero is the group of divided by zero errors
 	ErrGroupDividedByZero
 	// ErrGroupAutoIncReadFailed is the group of auto increment read failed errors
@@ -223,6 +225,8 @@ func init() {
 		ErrGroupBadNull: {
 			errno.ErrBadNull,
 			errno.ErrWarnNullToNotnull,
+		},
+		ErrGroupNoDefault: {
 			errno.ErrNoDefaultForField,
 		},
 		ErrGroupDividedByZero: {

pkg/executor/BUILD.bazel

@@ -441,6 +441,7 @@ go_test(
         "//pkg/store/helper",
         "//pkg/store/mockstore",
         "//pkg/store/mockstore/unistore",
+        "//pkg/table",
         "//pkg/table/tables",
         "//pkg/tablecodec",
         "//pkg/testkit",

pkg/executor/executor_pkg_test.go

@@ -348,6 +348,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelError
 				l[errctx.ErrGroupDupKey] = errctx.LevelError
 				l[errctx.ErrGroupBadNull] = errctx.LevelError
+				l[errctx.ErrGroupNoDefault] = errctx.LevelError
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelError
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelError
@@ -362,6 +363,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				l[errctx.ErrGroupDupKey] = errctx.LevelError
 				l[errctx.ErrGroupBadNull] = errctx.LevelWarn
+				l[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelError
@@ -376,6 +378,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				l[errctx.ErrGroupDupKey] = errctx.LevelWarn
 				l[errctx.ErrGroupBadNull] = errctx.LevelWarn
+				l[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelWarn
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelWarn
@@ -390,6 +393,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				l[errctx.ErrGroupDupKey] = errctx.LevelWarn
 				l[errctx.ErrGroupBadNull] = errctx.LevelWarn
+				l[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelWarn
@@ -404,6 +408,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				l[errctx.ErrGroupDupKey] = errctx.LevelWarn
 				l[errctx.ErrGroupBadNull] = errctx.LevelWarn
+				l[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelError
@@ -418,6 +423,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelError
 				l[errctx.ErrGroupDupKey] = errctx.LevelError
 				l[errctx.ErrGroupBadNull] = errctx.LevelError
+				l[errctx.ErrGroupNoDefault] = errctx.LevelError
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelIgnore
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelError
@@ -432,6 +438,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				l[errctx.ErrGroupDupKey] = errctx.LevelError
 				l[errctx.ErrGroupBadNull] = errctx.LevelError
+				l[errctx.ErrGroupNoDefault] = errctx.LevelError
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelError
@@ -446,6 +453,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				l[errctx.ErrGroupDupKey] = errctx.LevelError
 				l[errctx.ErrGroupBadNull] = errctx.LevelError
+				l[errctx.ErrGroupNoDefault] = errctx.LevelError
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelError
@@ -460,6 +468,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelError
 				l[errctx.ErrGroupDupKey] = errctx.LevelError
 				l[errctx.ErrGroupBadNull] = errctx.LevelError
+				l[errctx.ErrGroupNoDefault] = errctx.LevelError
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelWarn
@@ -474,6 +483,7 @@ func TestErrLevelsForResetStmtContext(t *testing.T) {
 				l[errctx.ErrGroupTruncate] = errctx.LevelError
 				l[errctx.ErrGroupDupKey] = errctx.LevelError
 				l[errctx.ErrGroupBadNull] = errctx.LevelError
+				l[errctx.ErrGroupNoDefault] = errctx.LevelError
 				l[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				l[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelError
 				l[errctx.ErrGroupNoMatchedPartition] = errctx.LevelWarn

pkg/executor/insert_test.go

@@ -24,6 +24,7 @@ import (
 	"github.com/pingcap/tidb/pkg/executor"
 	"github.com/pingcap/tidb/pkg/meta/autoid"
 	"github.com/pingcap/tidb/pkg/sessionctx/variable"
+	"github.com/pingcap/tidb/pkg/table"
 	"github.com/pingcap/tidb/pkg/testkit"
 	"github.com/pingcap/tidb/pkg/util"
 	"github.com/pingcap/tidb/pkg/util/execdetails"
@@ -657,3 +658,30 @@ func TestMySQLInsertID(t *testing.T) {
 	tk.MustExec("insert into tb(a, b) values(1,2) on duplicate key update b = 2;")
 	require.Equal(t, tk.Session().LastInsertID(), uint64(0))
 }
+
+func TestInsertNullInNonStrictMode(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+	tk.MustExec("create table t1 (id int primary key, col1 varchar(10) not null default '')")
+	tk.MustExec("create table t2 (id int primary key, col1 varchar(10))")
+	tk.MustExec("insert into t2 values (1, null)")
+	tk.MustExec("insert ignore into t1 values(5, null)")
+
+	tk.MustExec("set session sql_mode = ''")
+
+	err := tk.ExecToErr("insert into t1 values(1, null)")
+	require.EqualError(t, err, table.ErrColumnCantNull.GenWithStackByArgs("col1").Error())
+
+	err = tk.ExecToErr("insert into t1 set id = 1, col1 = null")
+	require.EqualError(t, err, table.ErrColumnCantNull.GenWithStackByArgs("col1").Error())
+
+	err = tk.ExecToErr("insert t1 VALUES (5, 5) ON DUPLICATE KEY UPDATE col1 = null")
+	require.EqualError(t, err, table.ErrColumnCantNull.GenWithStackByArgs("col1").Error())
+
+	tk.MustExec("insert into t1 select * from t2")
+	tk.MustExec("insert into t1 values(2, null), (3, 3), (4, 4)")
+	tk.MustExec("update t1 set col1 = null where id = 3")
+	tk.MustExec("insert ignore t1 VALUES (4, 4) ON DUPLICATE KEY UPDATE col1 = null")
+	tk.MustQuery("select * from t1").Check(testkit.RowsWithSep("|", "1|", "2|", "3|", "4|", "5|"))
+}

pkg/executor/load_data.go

@@ -153,6 +153,7 @@ func setNonRestrictiveFlags(stmtCtx *stmtctx.StatementContext) {
 	levels := stmtCtx.ErrLevels()
 	levels[errctx.ErrGroupDupKey] = errctx.LevelWarn
 	levels[errctx.ErrGroupBadNull] = errctx.LevelWarn
+	levels[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 	stmtCtx.SetErrLevels(levels)
 	stmtCtx.SetTypeFlags(stmtCtx.TypeFlags().WithTruncateAsWarning(true))
 }

pkg/executor/select.go

@@ -1067,7 +1067,11 @@ func ResetContextOfStmt(ctx sessionctx.Context, s ast.StmtNode) (err error) {
 			errLevels[errctx.ErrGroupAutoIncReadFailed] = errctx.LevelWarn
 			errLevels[errctx.ErrGroupNoMatchedPartition] = errctx.LevelWarn
 		}
-		errLevels[errctx.ErrGroupBadNull] = errctx.ResolveErrLevel(false, !strictSQLMode || stmt.IgnoreErr)
+		// For single-row INSERT statements, ignore non-strict mode
+		// See https://dev.mysql.com/doc/refman/5.7/en/constraint-invalid-data.html
+		isSingleInsert := len(stmt.Lists) == 1
+		errLevels[errctx.ErrGroupBadNull] = errctx.ResolveErrLevel(false, (!strictSQLMode && !isSingleInsert) || stmt.IgnoreErr)
+		errLevels[errctx.ErrGroupNoDefault] = errctx.ResolveErrLevel(false, !strictSQLMode || stmt.IgnoreErr)
 		errLevels[errctx.ErrGroupDividedByZero] = errctx.ResolveErrLevel(
 			!vars.SQLMode.HasErrorForDivisionByZeroMode(),
 			!strictSQLMode || stmt.IgnoreErr,
@@ -1212,6 +1216,7 @@ func ResetUpdateStmtCtx(sc *stmtctx.StatementContext, stmt *ast.UpdateStmt, vars
 	errLevels := sc.ErrLevels()
 	errLevels[errctx.ErrGroupDupKey] = errctx.ResolveErrLevel(false, stmt.IgnoreErr)
 	errLevels[errctx.ErrGroupBadNull] = errctx.ResolveErrLevel(false, !strictSQLMode || stmt.IgnoreErr)
+	errLevels[errctx.ErrGroupNoDefault] = errLevels[errctx.ErrGroupBadNull]
 	errLevels[errctx.ErrGroupDividedByZero] = errctx.ResolveErrLevel(
 		!vars.SQLMode.HasErrorForDivisionByZeroMode(),
 		!strictSQLMode || stmt.IgnoreErr,
@@ -1233,6 +1238,7 @@ func ResetDeleteStmtCtx(sc *stmtctx.StatementContext, stmt *ast.DeleteStmt, vars
 	errLevels := sc.ErrLevels()
 	errLevels[errctx.ErrGroupDupKey] = errctx.ResolveErrLevel(false, stmt.IgnoreErr)
 	errLevels[errctx.ErrGroupBadNull] = errctx.ResolveErrLevel(false, !strictSQLMode || stmt.IgnoreErr)
+	errLevels[errctx.ErrGroupNoDefault] = errLevels[errctx.ErrGroupBadNull]
 	errLevels[errctx.ErrGroupDividedByZero] = errctx.ResolveErrLevel(
 		!vars.SQLMode.HasErrorForDivisionByZeroMode(),
 		!strictSQLMode || stmt.IgnoreErr,

pkg/executor/test/writetest/write_test.go

@@ -240,6 +240,7 @@ func TestIssue18681(t *testing.T) {
 	levels := ctx.GetSessionVars().StmtCtx.ErrLevels()
 	levels[errctx.ErrGroupDupKey] = errctx.LevelWarn
 	levels[errctx.ErrGroupBadNull] = errctx.LevelWarn
+	levels[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 
 	sc := ctx.GetSessionVars().StmtCtx
 	oldTypeFlags := sc.TypeFlags()

pkg/expression/builtin_miscellaneous_vec_test.go

@@ -154,6 +154,7 @@ func TestSleepVectorized(t *testing.T) {
 	// non-strict model
 	var levels errctx.LevelMap
 	levels[errctx.ErrGroupBadNull] = errctx.LevelWarn
+	levels[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 	sessVars.StmtCtx.SetErrLevels(levels)
 	input.AppendFloat64(0, 1)
 	err = vecEvalType(ctx, f, types.ETInt, input, result)
@@ -188,6 +189,7 @@ func TestSleepVectorized(t *testing.T) {
 
 	// for error case under the strict model
 	levels[errctx.ErrGroupBadNull] = errctx.LevelError
+	levels[errctx.ErrGroupNoDefault] = errctx.LevelError
 	sessVars.StmtCtx.SetErrLevels(levels)
 	input.Reset()
 	input.AppendNull(0)

pkg/expression/evaluator_test.go

@@ -108,6 +108,7 @@ func TestSleep(t *testing.T) {
 	// non-strict model
 	var levels errctx.LevelMap
 	levels[errctx.ErrGroupBadNull] = errctx.LevelWarn
+	levels[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 	sessVars.StmtCtx.SetErrLevels(levels)
 	d := make([]types.Datum, 1)
 	f, err := fc.getFunction(ctx, datumsToConstants(d))
@@ -128,6 +129,7 @@ func TestSleep(t *testing.T) {
 
 	// for error case under the strict model
 	levels[errctx.ErrGroupBadNull] = errctx.LevelError
+	levels[errctx.ErrGroupNoDefault] = errctx.LevelError
 	sessVars.StmtCtx.SetErrLevels(levels)
 	d[0].SetNull()
 	_, err = fc.getFunction(ctx, datumsToConstants(d))

pkg/expression/exprstatic/evalctx_test.go

@@ -110,6 +110,7 @@ func getEvalCtxOptionsForTest(t *testing.T) ([]EvalCtxOption, *evalCtxOptionsTes
 		WithTypeFlags(types.FlagAllowNegativeToUnsigned | types.FlagSkipASCIICheck),
 		WithErrLevelMap(errctx.LevelMap{
 			errctx.ErrGroupBadNull:       errctx.LevelError,
+			errctx.ErrGroupNoDefault:     errctx.LevelError,
 			errctx.ErrGroupDividedByZero: errctx.LevelWarn,
 		}),
 		WithLocation(loc),
@@ -134,6 +135,7 @@ func checkOptionsStaticEvalCtx(t *testing.T, ctx *EvalContext, s *evalCtxOptions
 	)
 	require.Equal(t, errctx.NewContextWithLevels(errctx.LevelMap{
 		errctx.ErrGroupBadNull:       errctx.LevelError,
+		errctx.ErrGroupNoDefault:     errctx.LevelError,
 		errctx.ErrGroupDividedByZero: errctx.LevelWarn,
 	}, ctx), ctx.ErrCtx())
 	require.Same(t, s.loc, ctx.Location())

pkg/expression/sessionexpr/sessionctx_test.go

@@ -54,7 +54,11 @@ func TestSessionEvalContextBasic(t *testing.T) {
 	ctx.ResetSessionAndStmtTimeZone(time.FixedZone("UTC+11", 11*3600))
 	vars.SQLMode = mysql.ModeStrictTransTables | mysql.ModeNoZeroDate
 	sc.SetTypeFlags(types.FlagIgnoreInvalidDateErr | types.FlagSkipUTF8Check)
-	sc.SetErrLevels(errctx.LevelMap{errctx.ErrGroupDupKey: errctx.LevelWarn, errctx.ErrGroupBadNull: errctx.LevelIgnore})
+	sc.SetErrLevels(errctx.LevelMap{
+		errctx.ErrGroupDupKey:    errctx.LevelWarn,
+		errctx.ErrGroupBadNull:   errctx.LevelIgnore,
+		errctx.ErrGroupNoDefault: errctx.LevelIgnore,
+	})
 	vars.CurrentDB = "db1"
 	vars.MaxAllowedPacket = 123456
 

pkg/lightning/backend/kv/context.go

@@ -57,6 +57,7 @@ func newLitExprContext(sqlMode mysql.SQLMode, sysVars map[string]string, timesta
 	errLevels := stmtctx.DefaultStmtErrLevels
 	errLevels[errctx.ErrGroupTruncate] = errctx.ResolveErrLevel(flags.IgnoreTruncateErr(), flags.TruncateAsWarning())
 	errLevels[errctx.ErrGroupBadNull] = errctx.ResolveErrLevel(false, !sqlMode.HasStrictMode())
+	errLevels[errctx.ErrGroupNoDefault] = errctx.ResolveErrLevel(false, !sqlMode.HasStrictMode())
 	errLevels[errctx.ErrGroupDividedByZero] =
 		errctx.ResolveErrLevel(!sqlMode.HasErrorForDivisionByZeroMode(), !sqlMode.HasStrictMode())
 

pkg/lightning/backend/kv/context_test.go

@@ -52,6 +52,7 @@ func TestLitExprContext(t *testing.T) {
 				m := stmtctx.DefaultStmtErrLevels
 				m[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				m[errctx.ErrGroupBadNull] = errctx.LevelWarn
+				m[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 				m[errctx.ErrGroupDividedByZero] = errctx.LevelIgnore
 				return m
 			}(),
@@ -72,6 +73,7 @@ func TestLitExprContext(t *testing.T) {
 				m := stmtctx.DefaultStmtErrLevels
 				m[errctx.ErrGroupTruncate] = errctx.LevelError
 				m[errctx.ErrGroupBadNull] = errctx.LevelError
+				m[errctx.ErrGroupNoDefault] = errctx.LevelError
 				m[errctx.ErrGroupDividedByZero] = errctx.LevelError
 				return m
 			}(),
@@ -83,6 +85,7 @@ func TestLitExprContext(t *testing.T) {
 				m := stmtctx.DefaultStmtErrLevels
 				m[errctx.ErrGroupTruncate] = errctx.LevelWarn
 				m[errctx.ErrGroupBadNull] = errctx.LevelWarn
+				m[errctx.ErrGroupNoDefault] = errctx.LevelWarn
 				m[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
 				return m
 			}(),
@@ -94,6 +97,7 @@ func TestLitExprContext(t *testing.T) {
 				m := stmtctx.DefaultStmtErrLevels
 				m[errctx.ErrGroupTruncate] = errctx.LevelError
 				m[errctx.ErrGroupBadNull] = errctx.LevelError
+				m[errctx.ErrGroupNoDefault] = errctx.LevelError
 				m[errctx.ErrGroupDividedByZero] = errctx.LevelIgnore
 				return m
 			}(),
@@ -105,6 +109,7 @@ func TestLitExprContext(t *testing.T) {
 				m := stmtctx.DefaultStmtErrLevels
 				m[errctx.ErrGroupTruncate] = errctx.LevelError
 				m[errctx.ErrGroupBadNull] = errctx.LevelError
+				m[errctx.ErrGroupNoDefault] = errctx.LevelError
 				m[errctx.ErrGroupDividedByZero] = errctx.LevelIgnore
 				return m
 			}(),
@@ -116,6 +121,7 @@ func TestLitExprContext(t *testing.T) {
 				m := stmtctx.DefaultStmtErrLevels
 				m[errctx.ErrGroupTruncate] = errctx.LevelError
 				m[errctx.ErrGroupBadNull] = errctx.LevelError
+				m[errctx.ErrGroupNoDefault] = errctx.LevelError
 				m[errctx.ErrGroupDividedByZero] = errctx.LevelIgnore
 				return m
 			}(),

pkg/lightning/errormanager/errormanager.go

@@ -150,7 +150,7 @@ const (
 	`
 
 	insertIntoConflictErrorData = `
-		INSERT INTO %s.` + ConflictErrorTableName + `
+		INSERT IGNORE INTO %s.` + ConflictErrorTableName + `
 		(task_id, table_name, index_name, key_data, row_data, raw_key, raw_value, raw_handle, raw_row, kv_type)
 		VALUES
 	`

pkg/lightning/errormanager/errormanager_test.go

@@ -497,7 +497,7 @@ func TestReplaceConflictOneUniqueKey(t *testing.T) {
 			AddRow(3, data3IndexKey, "uni_b", data3IndexValue, data3RowKey).
 			AddRow(4, data3IndexKey, "uni_b", data4IndexValue, data4RowKey))
 	mockDB.ExpectBegin()
-	mockDB.ExpectExec("INSERT INTO `lightning_task_info`\\.conflict_error_v3.*").
+	mockDB.ExpectExec("INSERT IGNORE INTO `lightning_task_info`\\.conflict_error_v3.*").
 		WithArgs(0, "test", nil, nil, data2RowKey, data2RowValue, 2,
 			0, "test", nil, nil, data4RowKey, data4RowValue, 2).
 		WillReturnResult(driver.ResultNoRows)

pkg/lightning/errormanager/resolveconflict_test.go

@@ -178,7 +178,7 @@ func TestReplaceConflictMultipleKeysNonclusteredPk(t *testing.T) {
 			AddRow(3, data6RowKey, "PRIMARY", data6RowValue, data5RowKey).
 			AddRow(4, data6RowKey, "PRIMARY", data7NonclusteredValue, data6NonclusteredKey))
 	mockDB.ExpectBegin()
-	mockDB.ExpectExec("INSERT INTO `lightning_task_info`\\.conflict_error_v3.*").
+	mockDB.ExpectExec("INSERT IGNORE INTO `lightning_task_info`\\.conflict_error_v3.*").
 		WithArgs(0, "a", nil, nil, data2NonclusteredKey, data2NonclusteredValue, 2,
 			0, "a", nil, nil, data6NonclusteredKey, data6NonclusteredValue, 2).
 		WillReturnResult(driver.ResultNoRows)
@@ -361,7 +361,7 @@ func TestReplaceConflictOneKeyNonclusteredPk(t *testing.T) {
 			AddRow(1, data3IndexKey, "PRIMARY", data3IndexValue, data3RowKey).
 			AddRow(2, data3IndexKey, "PRIMARY", data4IndexValue, data4RowKey))
 	mockDB.ExpectBegin()
-	mockDB.ExpectExec("INSERT INTO `lightning_task_info`\\.conflict_error_v3.*").
+	mockDB.ExpectExec("INSERT IGNORE INTO `lightning_task_info`\\.conflict_error_v3.*").
 		WithArgs(0, "a", nil, nil, data4RowKey, data4RowValue, 2).
 		WillReturnResult(driver.ResultNoRows)
 	mockDB.ExpectCommit()
@@ -547,7 +547,7 @@ func TestReplaceConflictOneUniqueKeyNonclusteredPk(t *testing.T) {
 			AddRow(5, data3IndexKey, "PRIMARY", data3IndexValue, data3RowKey).
 			AddRow(6, data3IndexKey, "PRIMARY", data4NonclusteredValue, data4RowKey))
 	mockDB.ExpectBegin()
-	mockDB.ExpectExec("INSERT INTO `lightning_task_info`\\.conflict_error_v3.*").
+	mockDB.ExpectExec("INSERT IGNORE INTO `lightning_task_info`\\.conflict_error_v3.*").
 		WithArgs(0, "a", nil, nil, data5RowKey, data5RowValue, 2,
 			0, "a", nil, nil, data2RowKey, data2RowValue, 2,
 			0, "a", nil, nil, data4RowKey, data4RowValue, 2).
@@ -754,7 +754,7 @@ func TestReplaceConflictOneUniqueKeyNonclusteredVarcharPk(t *testing.T) {
 			AddRow(5, data3IndexKey, "PRIMARY", data3IndexValue, data3RowKey).
 			AddRow(6, data3IndexKey, "PRIMARY", data4IndexValue, data4RowKey))
 	mockDB.ExpectBegin()
-	mockDB.ExpectExec("INSERT INTO `lightning_task_info`\\.conflict_error_v3.*").
+	mockDB.ExpectExec("INSERT IGNORE INTO `lightning_task_info`\\.conflict_error_v3.*").
 		WithArgs(0, "a", nil, nil, data5RowKey, data5RowValue, 2,
 			0, "a", nil, nil, data2RowKey, data2RowValue, 2,
 			0, "a", nil, nil, data4RowKey, data4RowValue, 2).

pkg/table/column.go

@@ -511,7 +511,10 @@ func (c *Column) CheckNotNull(data *types.Datum, rowCntInLoadData uint64) error
 // error is ErrWarnNullToNotnull.
 // Otherwise, the error is ErrColumnCantNull.
 // If BadNullAsWarning is true, it will append the error as a warning, else return the error.
-func (c *Column) HandleBadNull(ec errctx.Context, d *types.Datum, rowCntInLoadData uint64) error {
+func (c *Column) HandleBadNull(
+	ec errctx.Context,
+	d *types.Datum,
+	rowCntInLoadData uint64) error {
 	if err := c.CheckNotNull(d, rowCntInLoadData); err != nil {
 		if ec.HandleError(err) == nil {
 			*d = GetZeroValue(c.ToInfo())
@@ -554,7 +557,7 @@ func GetColOriginDefaultValueWithoutStrictSQLMode(ctx expression.BuildContext, c
 // But CheckNoDefaultValueForInsert logic should only check before insert.
 func CheckNoDefaultValueForInsert(sc *stmtctx.StatementContext, col *model.ColumnInfo) error {
 	if mysql.HasNoDefaultValueFlag(col.GetFlag()) && !col.DefaultIsExpr && col.GetDefaultValue() == nil && col.GetType() != mysql.TypeEnum {
-		ignoreErr := sc.ErrGroupLevel(errctx.ErrGroupBadNull) != errctx.LevelError
+		ignoreErr := sc.ErrGroupLevel(errctx.ErrGroupNoDefault) != errctx.LevelError
 		if !ignoreErr {
 			return ErrNoDefaultValue.GenWithStackByArgs(col.Name)
 		}