Fix enum Compare method to handle ErrDataTruncatedForColumn in comparisons

During enum comparisons, the Convert method may return ErrDataTruncatedForColumn
in strict mode. The Compare method should ignore this error type to allow
comparisons to complete successfully, matching the existing behavior for
ErrConvertingToEnum.

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

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

Author: elianddb

sql/types/enum.go

@@ -129,11 +129,11 @@ func (t EnumType) Compare(ctx context.Context, a interface{}, b interface{}) (in
 	// Attempt to convert the values to their enum values, but don't error
 	// out if they aren't valid enum values.
 	ai, _, err := t.Convert(ctx, a)
-	if err != nil && !ErrConvertingToEnum.Is(err) {
+	if err != nil && !ErrConvertingToEnum.Is(err) && !ErrDataTruncatedForColumn.Is(err) {
 		return 0, err
 	}
 	bi, _, err := t.Convert(ctx, b)
-	if err != nil && !ErrConvertingToEnum.Is(err) {
+	if err != nil && !ErrConvertingToEnum.Is(err) && !ErrDataTruncatedForColumn.Is(err) {
 		return 0, err
 	}
 
@@ -164,16 +164,17 @@ func (t EnumType) Convert(ctx context.Context, v interface{}) (interface{}, sql.
 
 	switch value := v.(type) {
 	case int:
-		if _, ok := t.At(value); ok {
-			// Special handling for index 0 in strict mode
-			if value == 0 {
-				if sqlCtx, ok := ctx.(*sql.Context); ok {
-					sqlMode := sql.LoadSqlMode(sqlCtx)
-					if sqlMode.ModeEnabled(sql.StrictTransTables) {
-						return nil, sql.OutOfRange, ErrDataTruncatedForColumn.New("")
-					}
+		// Special handling for index 0 (empty value) in strict mode
+		if value == 0 {
+			if sqlCtx, ok := ctx.(*sql.Context); ok {
+				sqlMode := sql.LoadSqlMode(sqlCtx)
+				if sqlMode.ModeEnabled(sql.StrictTransTables) {
+					return nil, sql.OutOfRange, ErrDataTruncatedForColumn.New("")
 				}
 			}
+			return uint16(0), sql.InRange, nil
+		}
+		if _, ok := t.At(value); ok {
 			return uint16(value), sql.InRange, nil
 		}
 	case uint: