BUG#17772

A crash after ALTER TABLE t1 RENAME ...

mysql-test/r/partition.result

@@ -546,4 +546,15 @@ t1	CREATE TABLE `t1` (
   `b` int(11) DEFAULT NULL
 ) ENGINE=MyISAM DEFAULT CHARSET=latin1 PARTITION BY LIST (a) (PARTITION p1 VALUES IN (1) ENGINE = MyISAM, PARTITION p2 VALUES IN (2) ENGINE = MyISAM)
 drop table t1;
+create table t1 (a int unsigned not null auto_increment primary key)
+partition by key(a);
+alter table t1 rename t2, add c char(10), comment "no comment";
+show create table t2;
+Table	Create Table
+t2	CREATE TABLE `t2` (
+  `a` int(10) unsigned NOT NULL AUTO_INCREMENT,
+  `c` char(10) DEFAULT NULL,
+  PRIMARY KEY (`a`)
+) ENGINE=MyISAM DEFAULT CHARSET=latin1 COMMENT='no comment' PARTITION BY KEY (a) 
+drop table t2;
 End of 5.1 tests

mysql-test/t/partition.test

@@ -697,4 +697,21 @@ alter table t1 add primary key (b);
 show create table t1;
 drop table t1;
 
+############################################
+#
+# Author: Mikael Ronstrom
+# Date:   2006-03-01
+# Purpose
+# Bug 17772: Crash at ALTER TABLE with rename
+#            and add column + comment on
+#            partitioned table
+#
+############################################
+create table t1 (a int unsigned not null auto_increment primary key)
+partition by key(a);
+alter table t1 rename t2, add c char(10), comment "no comment";
+show create table t2;
+
+drop table t2;
+
 --echo End of 5.1 tests

sql/sql_lex.h

@@ -761,6 +761,7 @@ typedef struct st_lex
   const uchar *tok_start_prev, *tok_end_prev;
 
   char *length,*dec,*change,*name;
+  Table_ident *like_name;
   char *help_arg;
   char *backup_dir;				/* For RESTORE/BACKUP */
   char* to_log;                                 /* For PURGE MASTER LOGS TO */

sql/sql_parse.cc

@@ -2897,9 +2897,9 @@ mysql_execute_command(THD *thd)
     else
     {
       /* regular create */
-      if (lex->name)
+      if (lex->like_name)
         res= mysql_create_like_table(thd, create_table, &lex->create_info, 
-                                     (Table_ident *)lex->name); 
+                                     lex->like_name); 
       else
       {
         res= mysql_create_table(thd, create_table->db,

sql/sql_partition.cc

@@ -3741,14 +3741,14 @@ bool mysql_unpack_partition(THD *thd, const uchar *part_buf,
              ha_legacy_type(default_db_type)));
   if (is_create_table_ind)
   {
-    if (old_lex->name)
+    if (old_lex->like_name)
     {
       /*
         This code is executed when we do a CREATE TABLE t1 LIKE t2
-        old_lex->name contains the t2 and the table we are opening has 
+        old_lex->like_name contains the t2 and the table we are opening has 
         name t1.
       */
-      Table_ident *table_ident= (Table_ident *)old_lex->name;
+      Table_ident *table_ident= old_lex->like_name;
       char *src_db= table_ident->db.str ? table_ident->db.str : thd->db;
       char *src_table= table_ident->table.str;
       char buf[FN_REFLEN];

sql/sql_yacc.yy

@@ -1214,7 +1214,8 @@ create:
 	  lex->create_info.options=$2 | $4;
 	  lex->create_info.db_type= lex->thd->variables.table_type;
 	  lex->create_info.default_table_charset= NULL;
-	  lex->name=0;
+	  lex->name= 0;
+         lex->like_name= 0;
 	}
 	create2
 	  { Lex->current_select= &Lex->select_lex; }
@@ -3272,13 +3273,13 @@ create2:
         | LIKE table_ident
           {
             LEX *lex=Lex;
-            if (!(lex->name= (char *)$2))
+            if (!(lex->like_name= $2))
               YYABORT;
           }
         | '(' LIKE table_ident ')'
           {
             LEX *lex=Lex;
-            if (!(lex->name= (char *)$3))
+            if (!(lex->like_name= $3))
               YYABORT;
           }
         ;
@@ -4712,8 +4713,8 @@ alter:
 	{
 	  THD *thd= YYTHD;
 	  LEX *lex= thd->lex;
+         lex->name= 0;
 	  lex->sql_command= SQLCOM_ALTER_TABLE;
-	  lex->name= 0;
 	  lex->duplicates= DUP_ERROR; 
 	  if (!lex->select_lex.add_table_to_list(thd, $4, NULL,
 						 TL_OPTION_UPDATING))
@@ -4722,7 +4723,8 @@ alter:
 	  lex->key_list.empty();
 	  lex->col_list.empty();
           lex->select_lex.init_order();
-	  lex->select_lex.db=lex->name=0;
+	  lex->select_lex.db=lex->name= 0;
+         lex->like_name= 0;
 	  bzero((char*) &lex->create_info,sizeof(lex->create_info));
 	  lex->create_info.db_type= (handlerton*) &default_hton;
 	  lex->create_info.default_table_charset= NULL;