bk commit into 4.0 tree (ingo:1.2179) BUG#10405

[ingo]

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4.0 repository of mydev. When mydev does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
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ChangeSet
  1.2179 06/04/10 13:38:56 ingo@stripped +1 -0
  Bug#10405 - myisamchk damages auto_increment columns when changing character set
  
  Whenever 'myisamchk' needed to recreate a table,
  the auto increment information was lost.
  
  Now the forgotten element of the table creation
  information is set correctly.

  myisam/mi_check.c
    1.136 06/04/10 13:38:54 ingo@stripped +17 -9
    Bug#10405 - myisamchk damages auto_increment columns when changing character set
    Added some DBUG statements.
    Enabled 'with_auto_increment' in 'create_info'
    when recreating a table.

# This is a BitKeeper patch.  What follows are the unified diffs for the
# set of deltas contained in the patch.  The rest of the patch, the part
# that BitKeeper cares about, is below these diffs.
# User:	ingo
# Host:	chilla.local
# Root:	/home/mydev/mysql-4.0-bug10405

--- 1.135/myisam/mi_check.c	2005-06-03 22:52:20 +02:00
+++ 1.136/myisam/mi_check.c	2006-04-10 13:38:54 +02:00
@@ -3415,6 +3415,7 @@
   ha_rows max_records;
   ulonglong file_length,tmp_length;
   MI_CREATE_INFO create_info;
+  DBUG_ENTER("recreate_table");
 
   error=1;					/* Default error */
   info= **org_info;
@@ -3424,7 +3425,7 @@
   unpack= (share.options & HA_OPTION_COMPRESS_RECORD) &&
     (param->testflag & T_UNPACK);
   if (!(keyinfo=(MI_KEYDEF*) my_alloca(sizeof(MI_KEYDEF)*share.base.keys)))
-    return 0;
+    DBUG_RETURN(0);
   memcpy((byte*) keyinfo,(byte*) share.keyinfo,
 	 (size_t) (sizeof(MI_KEYDEF)*share.base.keys));
 
@@ -3433,14 +3434,14 @@
 				       (key_parts+share.base.keys))))
   {
     my_afree((gptr) keyinfo);
-    return 1;
+    DBUG_RETURN(1);
   }
   if (!(recdef=(MI_COLUMNDEF*)
 	my_alloca(sizeof(MI_COLUMNDEF)*(share.base.fields+1))))
   {
     my_afree((gptr) keyinfo);
     my_afree((gptr) keysegs);
-    return 1;
+    DBUG_RETURN(1);
   }
   if (!(uniquedef=(MI_UNIQUEDEF*)
 	my_alloca(sizeof(MI_UNIQUEDEF)*(share.state.header.uniques+1))))
@@ -3448,7 +3449,7 @@
     my_afree((gptr) recdef);
     my_afree((gptr) keyinfo);
     my_afree((gptr) keysegs);
-    return 1;
+    DBUG_RETURN(1);
   }
 
   /* Copy the column definitions */
@@ -3521,6 +3522,11 @@
   create_info.language = (param->language ? param->language :
 			  share.state.header.language);
   create_info.key_file_length=  status_info.key_file_length;
+  /*
+    Allow for creating an auto_increment key. This has an effect only if
+    an auto_increment key exists in the original table.
+  */
+  create_info.with_auto_increment= TRUE;
   /* We don't have to handle symlinks here because we are using
      HA_DONT_TOUCH_DATA */
   if (mi_create(filename,
@@ -3565,7 +3571,7 @@
   my_afree((gptr) keyinfo);
   my_afree((gptr) recdef);
   my_afree((gptr) keysegs);
-  return error;
+  DBUG_RETURN(error);
 }
 
 
@@ -3668,6 +3674,8 @@
 			       my_bool repair_only)
 {
   byte *record;
+  DBUG_ENTER("update_auto_increment_key");
+
   if (!info->s->base.auto_key ||
       !(((ulonglong) 1 << (info->s->base.auto_key-1)
 	 & info->s->state.key_map)))
@@ -3676,7 +3684,7 @@
       mi_check_print_info(param,
 			  "Table: %s doesn't have an auto increment key\n",
 			  param->isam_file_name);
-    return;
+    DBUG_VOID_RETURN;
   }
   if (!(param->testflag & T_SILENT) &&
       !(param->testflag & T_REP))
@@ -3689,7 +3697,7 @@
 				  MYF(0))))
   {
     mi_check_print_error(param,"Not enough memory for extra record");
-    return;
+    DBUG_VOID_RETURN;
   }
 
   mi_extra(info,HA_EXTRA_KEYREAD,0);
@@ -3700,7 +3708,7 @@
       mi_extra(info,HA_EXTRA_NO_KEYREAD,0);
       my_free((char*) record, MYF(0));
       mi_check_print_error(param,"%d when reading last record",my_errno);
-      return;
+      DBUG_VOID_RETURN;
     }
     if (!repair_only)
       info->s->state.auto_increment=param->auto_increment_value;
@@ -3716,7 +3724,7 @@
   mi_extra(info,HA_EXTRA_NO_KEYREAD,0);
   my_free((char*) record, MYF(0));
   update_state_info(param, info, UPDATE_AUTO_INC);
-  return;
+  DBUG_VOID_RETURN;
 }
 
     /* calculate unique keys for each part key */