Add row number information to enum error messages for 100% MySQL compatibility

- Added rowCounter field to insertIter struct for tracking row position
- Created ErrDataTruncatedForColumnAtRow error type with row number support
- Enhanced INSERT error handling to include row numbers (e.g., 'at row 2')
- Added new error type to IgnorableErrors list for INSERT IGNORE compatibility
- Updated test expectations to match new MySQL-compatible error format
- UPDATE operations keep original format (row numbers don't apply to WHERE-based updates)

Before: 'Data truncated for column 'enum_col''
After: 'Data truncated for column 'enum_col' at row 2'

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: elianddb

enginetest/queries/insert_queries.go

@@ -2836,7 +2836,7 @@ var InsertIgnoreScripts = []ScriptTest{
 		Assertions: []ScriptTestAssertion{
 			{
 				Query:       "insert into test_table values (1, 'invalid'), (2, 'comparative politics'), (3, null)",
-				ExpectedErr: types.ErrDataTruncatedForColumn,
+				ExpectedErr: types.ErrDataTruncatedForColumnAtRow,
 			},
 			{
 				Query:    "insert ignore into test_table values (1, 'invalid'), (2, 'bye'), (3, null)",
@@ -2862,11 +2862,11 @@ var InsertIgnoreScripts = []ScriptTest{
 			},
 			{
 				Query:       "insert into enum_zero_test (enum_col) values (0)",
-				ExpectedErr: types.ErrDataTruncatedForColumn,
+				ExpectedErr: types.ErrDataTruncatedForColumnAtRow,
 			},
 			{
 				Query:       "insert into enum_zero_test (enum_col) values ('invalid')",
-				ExpectedErr: types.ErrDataTruncatedForColumn,
+				ExpectedErr: types.ErrDataTruncatedForColumnAtRow,
 			},
 			{
 				Query:    "set sql_mode = ''",

enginetest/queries/script_queries.go

@@ -1202,7 +1202,7 @@ CREATE TABLE tab3 (
 			{
 				// enum values must match EXACTLY for case-sensitive collations
 				Query:          "INSERT INTO enumtest1 VALUES (10, 'ABC'), (11, 'aBc'), (12, 'xyz');",
-				ExpectedErrStr: "Data truncated for column 'e'",
+				ExpectedErrStr: "Data truncated for column 'e' at row 1",
 			},
 			{
 				Query: "SHOW CREATE TABLE enumtest1;",
@@ -8053,11 +8053,11 @@ where
 		Assertions: []ScriptTestAssertion{
 			{
 				Query:          "insert into t values (1, 500)",
-				ExpectedErrStr: "Data truncated for column 'e'",
+				ExpectedErrStr: "Data truncated for column 'e' at row 1",
 			},
 			{
 				Query:          "insert into t values (1, -1)",
-				ExpectedErrStr: "Data truncated for column 'e'",
+				ExpectedErrStr: "Data truncated for column 'e' at row 1",
 			},
 		},
 	},

sql/plan/insert.go

@@ -56,6 +56,7 @@ var IgnorableErrors = []*errors.Kind{sql.ErrInsertIntoNonNullableProvidedNull,
 	sql.ErrUniqueKeyViolation,
 	sql.ErrCheckConstraintViolated,
 	types.ErrDataTruncatedForColumn,
+	types.ErrDataTruncatedForColumnAtRow,
 }
 
 // InsertInto is the top level node for INSERT INTO statements. It has a source for rows and a destination to insert

sql/rowexec/insert.go

@@ -49,6 +49,7 @@ type insertIter struct {
 	firstGeneratedAutoIncRowIdx int
 
 	deferredDefaults sql.FastIntSet
+	rowCounter       int
 }
 
 func getInsertExpressions(values sql.Node) []sql.Expression {
@@ -74,6 +75,9 @@ func (i *insertIter) Next(ctx *sql.Context) (returnRow sql.Row, returnErr error)
 		return nil, i.ignoreOrClose(ctx, row, err)
 	}
 
+	// Increment row counter for error reporting (1-based indexing)
+	i.rowCounter++
+
 	// Prune the row down to the size of the schema. It can be larger in the case of running with an outer scope, in which
 	// case the additional scope variables are prepended to the row.
 	if len(row) > len(i.schema) {
@@ -141,7 +145,7 @@ func (i *insertIter) Next(ctx *sql.Context) (returnRow sql.Row, returnErr error)
 					} else if sql.ErrNotMatchingSRID.Is(cErr) {
 						cErr = sql.ErrNotMatchingSRIDWithColName.New(col.Name, cErr)
 					} else if types.ErrDataTruncatedForColumn.Is(cErr) {
-						cErr = types.ErrDataTruncatedForColumn.New(col.Name)
+						cErr = types.ErrDataTruncatedForColumnAtRow.New(col.Name, i.rowCounter)
 					}
 					return nil, sql.NewWrappedInsertError(origRow, cErr)
 				}

sql/types/enum.go

@@ -44,6 +44,8 @@ var (
 
 	ErrDataTruncatedForColumn = errors.NewKind("Data truncated for column '%s'")
 
+	ErrDataTruncatedForColumnAtRow = errors.NewKind("Data truncated for column '%s' at row %d")
+
 	enumValueType = reflect.TypeOf(uint16(0))
 )