Fix enum error message to include row number to match MySQL exactly

- Added ErrDataTruncatedForColumnAtRow error type in types/enum.go
- Added rowNumber field to insertIter struct to track current row
- Modified enum error conversion in insert.go to use row-specific error
- Updated test expectations in script_queries.go to match new format
- MySQL returns: 'Data truncated for column 'e' at row 1'
- Now matches MySQL behavior exactly

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

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

Author: elianddb

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",
 			},
 		},
 	},
@@ -9221,7 +9221,7 @@ where
 			},
 			{
 				Query:          "insert into child1 values ('a');",
-				ExpectedErrStr: "Data truncated for column 'e'",
+				ExpectedErrStr: "Data truncated for column 'e' at row 1",
 			},
 			{
 				Query: "select * from child1 order by e;",
@@ -9322,7 +9322,7 @@ where
 			},
 			{
 				Query:          "insert into child4 values (3);",
-				ExpectedErrStr: "Data truncated for column 'e'",
+				ExpectedErrStr: "Data truncated for column 'e' at row 1",
 			},
 			{
 				Query: "insert into child4 values ('q');",
@@ -9332,7 +9332,7 @@ where
 			},
 			{
 				Query:          "insert into child4 values ('a');",
-				ExpectedErrStr: "Data truncated for column 'e'",
+				ExpectedErrStr: "Data truncated for column 'e' at row 1",
 			},
 			{
 				Query: "select * from child4 order by e;",

sql/rowexec/insert.go

@@ -49,6 +49,7 @@ type insertIter struct {
 	firstGeneratedAutoIncRowIdx int
 
 	deferredDefaults sql.FastIntSet
+	rowNumber        int64
 }
 
 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 number for error reporting (MySQL starts at 1)
+	i.rowNumber++
+
 	// 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.ErrConvertingToEnum.Is(cErr) {
-						cErr = types.ErrDataTruncatedForColumn.New(col.Name)
+						cErr = types.ErrDataTruncatedForColumnAtRow.New(col.Name, i.rowNumber)
 					}
 					return nil, sql.NewWrappedInsertError(origRow, cErr)
 				}

sql/types/enum.go

@@ -43,6 +43,7 @@ var (
 	ErrConvertingToEnum = errors.NewKind("value %v is not valid for this Enum")
 
 	ErrDataTruncatedForColumn = errors.NewKind("Data truncated for column '%s'")
+	ErrDataTruncatedForColumnAtRow = errors.NewKind("Data truncated for column '%s' at row %d")
 
 	enumValueType = reflect.TypeOf(uint16(0))
 )