Added flag to detect renaming of fields (not supported as fast alter table for ndbcluster)

include/mysql_com.h

@@ -99,6 +99,7 @@ enum enum_server_command
 #define GET_FIXED_FIELDS_FLAG (1 << 18) /* Used to get fields in item tree */
 #define FIELD_IN_PART_FUNC_FLAG (1 << 19)/* Field part of partition func */
 #define FIELD_IN_ADD_INDEX (1<< 20)	/* Intern: Field used in ADD INDEX */
+#define FIELD_IS_RENAMED (1<< 21)       /* Intern: Field is being renamed */
 
 #define REFRESH_GRANT		1	/* Refresh grant tables */
 #define REFRESH_LOG		2	/* Start on new log file */

sql/ha_ndbcluster.cc

@@ -9833,8 +9833,8 @@ bool ha_ndbcluster::check_if_incompatible_data(HA_CREATE_INFO *info,
   for (i= 0; i < table->s->fields; i++) 
   {
     Field *field= table->field[i];
-    const NDBCOL *col= tab->getColumn(field->field_name);
-    if (!col)
+    const NDBCOL *col= tab->getColumn(i);
+    if (field->flags & FIELD_IS_RENAMED)
     {
       DBUG_PRINT("info", ("Field has been renamed, copy table"));
       DBUG_RETURN(COMPATIBLE_DATA_NO);

sql/sql_table.cc

@@ -4744,6 +4744,11 @@ static uint compare_tables(TABLE *table, List<create_field> *create_list,
 	create_info->row_type != ROW_TYPE_FIXED)
       create_info->table_options|= HA_OPTION_PACK_RECORD;
 
+    /* Check if field was renamed */
+    if (my_strcasecmp(system_charset_info,
+		      field->field_name,
+		      new_field->field_name))
+      field->flags|= FIELD_IS_RENAMED;      
     /* Evaluate changes bitmap and send to check_if_incompatible_data() */
     if (!(tmp= field->is_equal(new_field)))
       DBUG_RETURN(ALTER_TABLE_DATA_CHANGED);