Bug#11751825 - OPTIMIZE PARTITION RECREATES FULL TABLE INSTEAD JUST PARTITION

PROBLEM 
-------

optimize on partiton will recreate the whole table 
instead of just partition.

ANALYSIS
--------

At present innodb doesn't support optimize option ,so we do a rebuild of the 
whole table and then call analyze() on the table.Presently for any optimize()
option (on table or partition) we display the following info to the user 

"Table does not support optimize, doing recreate + analyze instead".

FIX
---

It was decided for GA versions(5.1 and 5.5) whenever the user tries to 
optimize a partition(s) we will will display the following info the user

"Table does not support optimize on partitions.
All partitions will be rebuilt and analyzed."

Earlier partitions were not analyzed.Now all partitions  will be analyzed.  

If the user wants to optimize the whole table ,we will display the
previous info to the user. i.e

"Table does not support optimize, doing recreate + analyze instead"

For 5.6+ versions we will raise a new bug to support optimize() options
in innodb.

1 files changed, 23 insertions, 3 deletions

diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index b8d57341e42..a0545bb5342 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -4908,6 +4908,11 @@ send_result_message:
 
     case HA_ADMIN_TRY_ALTER:
     {
+      uint save_flags;
+      Alter_info *alter_info= &lex->alter_info;
+
+      /* Store the original value of alter_info->flags */
+      save_flags= alter_info->flags;
       /*
         This is currently used only by InnoDB. ha_innobase::optimize() answers
         "try with alter", so here we close the table, do an ALTER TABLE,
@@ -4915,9 +4920,18 @@ send_result_message:
         We have to end the row, so analyze could return more rows.
       */
       protocol->store(STRING_WITH_LEN("note"), system_charset_info);
-      protocol->store(STRING_WITH_LEN(
-          "Table does not support optimize, doing recreate + analyze instead"),
-                      system_charset_info);
+      if(alter_info->flags & ALTER_ADMIN_PARTITION)
+      {
+        protocol->store(STRING_WITH_LEN(
+        "Table does not support optimize on partitions. All partitions "
+        "will be rebuilt and analyzed."),system_charset_info);
+      }
+      else
+      {
+        protocol->store(STRING_WITH_LEN(
+        "Table does not support optimize, doing recreate + analyze instead"),
+        system_charset_info);
+      }
       if (protocol->write())
         goto err;
       ha_autocommit_or_rollback(thd, 0);
@@ -4941,9 +4955,15 @@ send_result_message:
       close_thread_tables(thd);
       if (!result_code) // recreation went ok
       {
+        /*
+          Reset the ALTER_ADMIN_PARTITION bit in alter_info->flags
+          to force analyze on all partitions.
+         */
+        alter_info->flags &= ~(ALTER_ADMIN_PARTITION);
         if ((table->table= open_ltable(thd, table, lock_type, 0)) &&
             ((result_code= table->table->file->ha_analyze(thd, check_opt)) > 0))
           result_code= 0; // analyze went ok
+        alter_info->flags= save_flags;
       }
       /* Start a new row for the final status row */
       protocol->prepare_for_resend();