Applying InnoDB Plugin 1.0.6 snapshot, Fixes BUG#48469

applied revisions: r6201, r6202, r6207, r6208, r6210

r6202 - port fix for BUG#48469 to plugin

Detailed revision comments:

r6201 | marko | 2009-11-19 14:09:11 +0200 (Thu, 19 Nov 2009) | 2 lines
branches/zip: ha_innobase::add_index(): Clarify the comment
on orphaned tables when creating a primary key.
r6202 | jyang | 2009-11-19 15:01:00 +0200 (Thu, 19 Nov 2009) | 8 lines
branches/zip: Function fseg_free() is no longer defined
in branches/zip. To port fix for bug #48469 to zip,
we can use btr_free_root() which frees the page,
and also does not require mini-transaction.

Approved by Marko.


r6207 | vasil | 2009-11-20 10:19:14 +0200 (Fri, 20 Nov 2009) | 54 lines
branches/zip: Merge r6198:6206 from branches/5.1:

(r6203 was skipped as it is already in branches/zip)

  ------------------------------------------------------------------------
  r6200 | vasil | 2009-11-19 12:14:23 +0200 (Thu, 19 Nov 2009) | 4 lines
  Changed paths:
     M /branches/5.1/btr/btr0btr.c
  
  branches/5.1:
  
  White space fixup - indent under the opening (
  
  ------------------------------------------------------------------------
  r6203 | jyang | 2009-11-19 15:12:22 +0200 (Thu, 19 Nov 2009) | 8 lines
  Changed paths:
     M /branches/5.1/btr/btr0btr.c
  
  branches/5.1: Use btr_free_root() instead of fseg_free() for
  the fix of bug #48469, because fseg_free() is not defined
  in the zip branch. And we could save one mini-trasaction started
  by fseg_free().
  
  Approved by Marko.
  
  
  ------------------------------------------------------------------------
  r6205 | jyang | 2009-11-20 07:55:48 +0200 (Fri, 20 Nov 2009) | 11 lines
  Changed paths:
     M /branches/5.1/handler/ha_innodb.cc
  
  branches/5.1: Add a special case to handle the Duplicated Key error
  and return DB_ERROR instead. This is to avoid a possible SIGSEGV
  by mysql error handling re-entering the storage layer for dup key
  info without proper table handle.
  This is to prevent a server crash when error situation in bug
  #45961 "DDL on partitioned innodb tables leaves data dictionary
  in an inconsistent state" happens.
  
  rb://157 approved by Sunny Bains.
  
  
  ------------------------------------------------------------------------
  r6206 | jyang | 2009-11-20 09:38:43 +0200 (Fri, 20 Nov 2009) | 5 lines
  Changed paths:
     M /branches/5.1/handler/ha_innodb.cc
  
  branches/5.1: Fix a minor code formating issue for 
  the parenthesis iplacement of the if condition in
  rename_table().
  
  
  ------------------------------------------------------------------------

r6208 | vasil | 2009-11-20 10:49:24 +0200 (Fri, 20 Nov 2009) | 4 lines
branches/zip:

Add ChangeLog entry for c6207.

r6210 | vasil | 2009-11-20 23:39:48 +0200 (Fri, 20 Nov 2009) | 3 lines
branches/zip:

Whitespace fixup.

storage/innodb_plugin/ChangeLog

+2009-11-20	The InnoDB Team
+
+	* handler/ha_innodb.cc:
+	Add a workaround to prevent a crash due to Bug#45961 DDL on
+	partitioned innodb tables leaves data dictionary in an inconsistent
+	state
+
 2009-11-19	The InnoDB Team
 
 	* btr/btr0btr.c:

storage/innodb_plugin/btr/btr0btr.c

@@ -794,8 +794,7 @@ btr_create(
 				 PAGE_HEADER + PAGE_BTR_SEG_LEAF, mtr)) {
 			/* Not enough space for new segment, free root
 			segment before return. */
-			fseg_free(space, page_no,
-				    PAGE_HEADER + PAGE_BTR_SEG_TOP);
+			btr_free_root(space, zip_size, page_no, mtr);
 
 			return(FIL_NULL);
 		}

storage/innodb_plugin/handler/ha_innodb.cc

@@ -793,6 +793,12 @@ convert_error_code_to_mysql(
 		return(-1); /* unspecified error */
 
 	case DB_DUPLICATE_KEY:
+		/* Be cautious with returning this error, since
+		mysql could re-enter the storage layer to get
+		duplicated key info, the operation requires a
+		valid table handle and/or transaction information,
+		which might not always be available in the error
+		handling stage. */
 		return(HA_ERR_FOUND_DUPP_KEY);
 
 	case DB_FOREIGN_DUPLICATE_KEY:
@@ -6815,6 +6821,24 @@ ha_innobase::rename_table(
 	innobase_commit_low(trx);
 	trx_free_for_mysql(trx);
 
+	/* Add a special case to handle the Duplicated Key error
+	and return DB_ERROR instead.
+	This is to avoid a possible SIGSEGV error from mysql error
+	handling code. Currently, mysql handles the Duplicated Key
+	error by re-entering the storage layer and getting dup key
+	info by calling get_dup_key(). This operation requires a valid
+	table handle ('row_prebuilt_t' structure) which could no
+	longer be available in the error handling stage. The suggested
+	solution is to report a 'table exists' error message (since
+	the dup key error here is due to an existing table whose name
+	is the one we are trying to rename to) and return the generic
+	error code. */
+	if (error == (int) DB_DUPLICATE_KEY) {
+		my_error(ER_TABLE_EXISTS_ERROR, MYF(0), to);
+
+		error = DB_ERROR;
+	}
+
 	error = convert_error_code_to_mysql(error, 0, NULL);
 
 	DBUG_RETURN(error);

storage/innodb_plugin/handler/handler0alter.cc

@@ -765,10 +765,11 @@ err_exit:
 	ut_ad(error == DB_SUCCESS);
 
 	/* Commit the data dictionary transaction in order to release
-	the table locks on the system tables.  Unfortunately, this
-	means that if MySQL crashes while creating a new primary key
-	inside row_merge_build_indexes(), indexed_table will not be
-	dropped on crash recovery.  Thus, it will become orphaned. */
+	the table locks on the system tables.  This means that if
+	MySQL crashes while creating a new primary key inside
+	row_merge_build_indexes(), indexed_table will not be dropped
+	by trx_rollback_active().  It will have to be recovered or
+	dropped by the database administrator. */
 	trx_commit_for_mysql(trx);
 
 	row_mysql_unlock_data_dictionary(trx);

storage/innodb_plugin/trx/trx0i_s.c

@@ -60,7 +60,7 @@ Created July 17, 2007 Vasil Dimov
 /** @brief The maximum number of chunks to allocate for a table cache.
 
 The rows of a table cache are stored in a set of chunks. When a new
-row is added a new chunk is allocated if necessary.  Assuming that the
+row is added a new chunk is allocated if necessary. Assuming that the
 first one is 1024 rows (TABLE_CACHE_INITIAL_ROWSNUM) and each
 subsequent is N/2 where N is the number of rows we have allocated till
 now, then 39th chunk would accommodate 1677416425 rows and all chunks