importinto: use same type context flag setting as insert

pkg/executor/select.go

@@ -1049,6 +1049,7 @@ func ResetContextOfStmt(ctx sessionctx.Context, s ast.StmtNode) (err error) {
 
 	errLevels := sc.ErrLevels()
 	errLevels[errctx.ErrGroupDividedByZero] = errctx.LevelWarn
+	inImportInto := false
 	switch stmt := s.(type) {
 	// `ResetUpdateStmtCtx` and `ResetDeleteStmtCtx` may modify the flags, so we'll need to store them.
 	case *ast.UpdateStmt:
@@ -1077,12 +1078,7 @@ func ResetContextOfStmt(ctx sessionctx.Context, s ast.StmtNode) (err error) {
 			!strictSQLMode || stmt.IgnoreErr,
 		)
 		sc.Priority = stmt.Priority
-		sc.SetTypeFlags(sc.TypeFlags().
-			WithTruncateAsWarning(!strictSQLMode || stmt.IgnoreErr).
-			WithIgnoreInvalidDateErr(vars.SQLMode.HasAllowInvalidDatesMode()).
-			WithIgnoreZeroInDate(!vars.SQLMode.HasNoZeroInDateMode() ||
-				!vars.SQLMode.HasNoZeroDateMode() || !strictSQLMode || stmt.IgnoreErr ||
-				vars.SQLMode.HasAllowInvalidDatesMode()))
+		sc.SetTypeFlags(util.GetTypeFlagsForInsert(sc.TypeFlags(), vars.SQLMode, stmt.IgnoreErr))
 	case *ast.CreateTableStmt, *ast.AlterTableStmt:
 		sc.InCreateOrAlterStmt = true
 		sc.SetTypeFlags(sc.TypeFlags().
@@ -1096,6 +1092,9 @@ func ResetContextOfStmt(ctx sessionctx.Context, s ast.StmtNode) (err error) {
 		sc.InLoadDataStmt = true
 		// return warning instead of error when load data meet no partition for value
 		errLevels[errctx.ErrGroupNoMatchedPartition] = errctx.LevelWarn
+	case *ast.ImportIntoStmt:
+		inImportInto = true
+		sc.SetTypeFlags(util.GetTypeFlagsForImportInto(sc.TypeFlags(), vars.SQLMode))
 	case *ast.SelectStmt:
 		sc.InSelectStmt = true
 
@@ -1153,7 +1152,7 @@ func ResetContextOfStmt(ctx sessionctx.Context, s ast.StmtNode) (err error) {
 		// WithAllowNegativeToUnsigned with false value indicates values less than 0 should be clipped to 0 for unsigned integer types.
 		// This is the case for `insert`, `update`, `alter table`, `create table` and `load data infile` statements, when not in strict SQL mode.
 		// see https://dev.mysql.com/doc/refman/5.7/en/out-of-range-and-overflow.html
-		WithAllowNegativeToUnsigned(!sc.InInsertStmt && !sc.InLoadDataStmt && !sc.InUpdateStmt && !sc.InCreateOrAlterStmt),
+		WithAllowNegativeToUnsigned(!sc.InInsertStmt && !sc.InLoadDataStmt && !inImportInto && !sc.InUpdateStmt && !sc.InCreateOrAlterStmt),
 	)
 
 	vars.PlanCacheParams.Reset()

pkg/executor/select_test.go

@@ -15,12 +15,15 @@
 package executor_test
 
 import (
+	"fmt"
 	"testing"
 
 	"github.com/pingcap/tidb/pkg/domain"
 	"github.com/pingcap/tidb/pkg/executor"
 	"github.com/pingcap/tidb/pkg/parser/ast"
+	"github.com/pingcap/tidb/pkg/parser/mysql"
 	"github.com/pingcap/tidb/pkg/util/mock"
+	"github.com/stretchr/testify/require"
 )
 
 func BenchmarkResetContextOfStmt(b *testing.B) {
@@ -31,3 +34,37 @@ func BenchmarkResetContextOfStmt(b *testing.B) {
 		executor.ResetContextOfStmt(ctx, stmt)
 	}
 }
+
+func TestImportIntoShouldHaveSameFlagsAsInsert(t *testing.T) {
+	insertStmt := &ast.InsertStmt{}
+	importStmt := &ast.ImportIntoStmt{}
+	insertCtx := mock.NewContext()
+	importCtx := mock.NewContext()
+	insertCtx.BindDomain(&domain.Domain{})
+	importCtx.BindDomain(&domain.Domain{})
+	for _, modeStr := range []string{
+		"",
+		"IGNORE_SPACE",
+		"STRICT_TRANS_TABLES",
+		"STRICT_ALL_TABLES",
+		"ALLOW_INVALID_DATES",
+		"NO_ZERO_IN_DATE",
+		"NO_ZERO_DATE",
+		"NO_ZERO_IN_DATE,STRICT_ALL_TABLES",
+		"NO_ZERO_DATE,STRICT_ALL_TABLES",
+		"NO_ZERO_IN_DATE,NO_ZERO_DATE,STRICT_ALL_TABLES",
+	} {
+		t.Run(fmt.Sprintf("mode %s", modeStr), func(t *testing.T) {
+			mode, err := mysql.GetSQLMode(modeStr)
+			require.NoError(t, err)
+			insertCtx.GetSessionVars().SQLMode = mode
+			require.NoError(t, executor.ResetContextOfStmt(insertCtx, insertStmt))
+			importCtx.GetSessionVars().SQLMode = mode
+			require.NoError(t, executor.ResetContextOfStmt(importCtx, importStmt))
+
+			insertTypeCtx := insertCtx.GetSessionVars().StmtCtx.TypeCtx()
+			importTypeCtx := importCtx.GetSessionVars().StmtCtx.TypeCtx()
+			require.EqualValues(t, insertTypeCtx.Flags(), importTypeCtx.Flags())
+		})
+	}
+}

pkg/types/context.go

@@ -34,7 +34,9 @@ const (
 	// FlagTruncateAsWarning indicates to append the truncate error to warnings instead of returning it to user.
 	FlagTruncateAsWarning
 	// FlagAllowNegativeToUnsigned indicates to allow the casting from negative to unsigned int.
-	// When this flag is not set by default, casting a negative value to unsigned results an overflow error.
+	// When this flag is not set by default, casting a negative value to unsigned
+	// results an overflow error, but if SQL mode is not strict, it's converted
+	// to 0 with a warning.
 	// Otherwise, a negative value will be cast to the corresponding unsigned value without any error.
 	// For example, when casting -1 to an unsigned bigint with `FlagAllowNegativeToUnsigned` set,
 	// we will get `18446744073709551615` which is the biggest unsigned value.

pkg/util/BUILD.bazel

@@ -41,6 +41,7 @@ go_library(
         "//pkg/session/cursor",
         "//pkg/session/txninfo",
         "//pkg/sessionctx/stmtctx",
+        "//pkg/types",
         "//pkg/util/collate",
         "//pkg/util/disk",
         "//pkg/util/execdetails",

pkg/util/misc.go

@@ -46,6 +46,7 @@ import (
 	pmodel "github.com/pingcap/tidb/pkg/parser/model"
 	"github.com/pingcap/tidb/pkg/parser/mysql"
 	"github.com/pingcap/tidb/pkg/parser/terror"
+	"github.com/pingcap/tidb/pkg/types"
 	"github.com/pingcap/tidb/pkg/util/collate"
 	"github.com/pingcap/tidb/pkg/util/logutil"
 	tlsutil "github.com/pingcap/tidb/pkg/util/tls"
@@ -693,3 +694,20 @@ func createTLSCertificates(certpath string, keypath string, rsaKeySize int) erro
 	// use RSA and unspecified signature algorithm
 	return CreateCertificates(certpath, keypath, rsaKeySize, x509.RSA, x509.UnknownSignatureAlgorithm)
 }
+
+// GetTypeFlagsForInsert gets the type flags for insert statement.
+func GetTypeFlagsForInsert(baseFlags types.Flags, sqlMode mysql.SQLMode, ignoreErr bool) types.Flags {
+	strictSQLMode := sqlMode.HasStrictMode()
+	return baseFlags.
+		WithTruncateAsWarning(!strictSQLMode || ignoreErr).
+		WithIgnoreInvalidDateErr(sqlMode.HasAllowInvalidDatesMode()).
+		WithIgnoreZeroInDate(!sqlMode.HasNoZeroInDateMode() ||
+			!sqlMode.HasNoZeroDateMode() || !strictSQLMode || ignoreErr ||
+			sqlMode.HasAllowInvalidDatesMode())
+}
+
+// GetTypeFlagsForImportInto gets the type flags for import into statement which
+// has the same flags as normal `INSERT INTO xxx`.
+func GetTypeFlagsForImportInto(baseFlags types.Flags, sqlMode mysql.SQLMode) types.Flags {
+	return GetTypeFlagsForInsert(baseFlags, sqlMode, false)
+}