bk commit into 4.1 tree (aelkin:1.2476)

[Andrei Elkin]

Below is the list of changes that have just been committed into a local
4.1 repository of elkin. When elkin does a push these changes will
be propagated to the main repository and, within 24 hours after the
push, to the public repository.
For information on how to access the public repository
see http://dev.mysql.com/doc/mysql/en/installing-source-tree.html

ChangeSet
  1.2476 06/05/12 21:38:41 aelkin@stripped +4 -0
  Merge mysql.com:/net/nb/home/elkin/MySQL/FIXES/4.1-bug19188_tmp_name
  into  mysql.com:/usr_rh9/home/elkin.rh9/MySQL/Merge/4.1

  sql/mysql_priv.h
    1.377 06/05/12 21:38:38 aelkin@stripped +13 -9
    manual merge, a comment added

  sql/sql_base.cc
    1.269 06/05/12 21:34:27 aelkin@stripped +0 -0
    Auto merged

  mysql-test/t/rpl_temporary.test
    1.17 06/05/12 21:34:27 aelkin@stripped +0 -0
    Auto merged

  mysql-test/r/rpl_temporary.result
    1.15 06/05/12 21:34:27 aelkin@stripped +0 -0
    Auto merged

# 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:	aelkin
# Host:	dsl-hkigw8-feb0de00-199.dhcp.inet.fi
# Root:	/usr_rh9/home/elkin.rh9/MySQL/Merge/4.1/RESYNC

--- 1.376/sql/mysql_priv.h	2006-05-09 23:01:28 +03:00
+++ 1.377/sql/mysql_priv.h	2006-05-12 21:38:38 +03:00
@@ -1275,12 +1275,28 @@
   return -1;
 }
 
+/*
+  wrapper to use instead of mysql_bin_log.write when
+  query is generated by the server using system_charset encoding
+*/
+
 inline void write_binlog_with_system_charset(THD * thd, Query_log_event * qinfo)
 {
   CHARSET_INFO * cs_save= thd->variables.character_set_client;
   thd->variables.character_set_client= system_charset_info;
   mysql_bin_log.write(qinfo);
   thd->variables.character_set_client= cs_save;
+}
+
+/*
+  is_user_table()
+  return true if the table was created explicitly
+*/
+
+inline bool is_user_table(TABLE * table)
+{
+  const char *name= table->real_name;
+  return strncmp(name, tmp_file_prefix, tmp_file_prefix_length);
 }
 
 /*

--- 1.268/sql/sql_base.cc	2006-05-09 23:01:28 +03:00
+++ 1.269/sql/sql_base.cc	2006-05-12 21:34:27 +03:00
@@ -493,118 +493,107 @@
 
 void close_temporary_tables(THD *thd)
 {
-  TABLE *next,
-    *prev_table /* prev link is not maintained in TABLE's double-linked list */,
-    *table;
-  char *query= (gptr) 0, *end;
-  uint query_buf_size, max_names_len; 
-  bool found_user_tables;
-
+  TABLE *table;
   if (!thd->temporary_tables)
     return;
   
-  LINT_INIT(end);
-  query_buf_size= 50;   // Enough for DROP ... TABLE IF EXISTS
+  if (!mysql_bin_log.is_open())
+  {
+    for (table= thd->temporary_tables; table; table= table->next)
+    {
+      close_temporary(table, 1);
+    }
+    thd->temporary_tables= 0;
+    return;
+  }
 
+  TABLE *next,
+    *prev_table /* prev link is not maintained in TABLE's double-linked list */;
+  bool was_quote_show= true; /* to assume thd->options has OPTION_QUOTE_SHOW_CREATE */
+  // Better add "if exists", in case a RESET MASTER has been done
+  const char stub[]= "DROP /*!40005 TEMPORARY */ TABLE IF EXISTS ";
+  uint stub_len= sizeof(stub) - 1;
+  char buf[256];
+  memcpy(buf, stub, stub_len);
+  String s_query= String(buf, sizeof(buf), system_charset_info);
+  bool found_user_tables= false;
+  LINT_INIT(next);
+  
   /* 
      insertion sort of temp tables by pseudo_thread_id to build ordered list 
      of sublists of equal pseudo_thread_id
   */
-  for (prev_table= thd->temporary_tables, 
-         table= prev_table->next,
-         found_user_tables= (prev_table->real_name[0] != '#'); 
+  
+  for (prev_table= thd->temporary_tables, table= prev_table->next;
        table;
        prev_table= table, table= table->next)
   {
-    TABLE *prev_sorted /* same as for prev_table */,
-      *sorted;
-    /*
-      table not created directly by the user is moved to the tail. 
-      Fixme/todo: nothing (I checked the manual) prevents user to create temp
-      with `#' 
-    */
-    if (table->real_name[0] == '#')
-      continue;
-    else 
+    TABLE *prev_sorted /* same as for prev_table */, *sorted;
+    if (is_user_table(table))
     {
-      found_user_tables = 1;
-    }
-    for (prev_sorted= NULL, sorted= thd->temporary_tables; sorted != table; 
-         prev_sorted= sorted, sorted= sorted->next)
-    {
-      if (sorted->real_name[0] == '#' || tmpkeyval(thd, sorted) > tmpkeyval(thd,
table))
+      if (!found_user_tables)
+        found_user_tables= true;
+      for (prev_sorted= NULL, sorted= thd->temporary_tables; sorted != table; 
+           prev_sorted= sorted, sorted= sorted->next)
       {
-        /* move into the sorted part of the list from the unsorted */
-        prev_table->next= table->next;
-        table->next= sorted;
-        if (prev_sorted) 
-        {
-          prev_sorted->next= table;
-        }
-        else
+        if (!is_user_table(sorted) ||
+            tmpkeyval(thd, sorted) > tmpkeyval(thd, table))
         {
-          thd->temporary_tables= table;
+          /* move into the sorted part of the list from the unsorted */
+          prev_table->next= table->next;
+          table->next= sorted;
+          if (prev_sorted) 
+          {
+            prev_sorted->next= table;
+          }
+          else
+          {
+            thd->temporary_tables= table;
+          }
+          table= prev_table;
+          break;
         }
-        table= prev_table;
-        break;
       }
     }
-  }  
-  /* 
-     calc query_buf_size as max per sublists, one sublist per pseudo thread id.
-     Also stop at first occurence of `#'-named table that starts 
-     all implicitly created temp tables
-  */
-  for (max_names_len= 0, table=thd->temporary_tables; 
-       table && table->real_name[0] != '#';
-       table=table->next)
+  }
+
+  /* We always quote db,table names though it is slight overkill */
+  if (found_user_tables &&
+      !(was_quote_show= (thd->options & OPTION_QUOTE_SHOW_CREATE)))
   {
-    uint tmp_names_len;
-    for (tmp_names_len= table->key_length + 1;
-         table->next && table->real_name[0] != '#' &&
-           tmpkeyval(thd, table) == tmpkeyval(thd, table->next);
-         table=table->next)
-    {
-      /*
-        We are going to add 4 ` around the db/table names, so 1 might not look
-        enough; indeed it is enough, because table->key_length is greater (by 8,
-        because of server_id and thread_id) than db||table.
-      */
-      tmp_names_len += table->next->key_length + 1;
-    }
-    if (tmp_names_len > max_names_len) max_names_len= tmp_names_len;
+    thd->options |= OPTION_QUOTE_SHOW_CREATE;
   }
   
-  /* allocate */
-  if (found_user_tables && mysql_bin_log.is_open() &&
-      (query = alloc_root(thd->mem_root, query_buf_size+= max_names_len)))
-    // Better add "if exists", in case a RESET MASTER has been done
-    end= strmov(query, "DROP /*!40005 TEMPORARY */ TABLE IF EXISTS ");
-
   /* scan sorted tmps to generate sequence of DROP */
-  for (table=thd->temporary_tables; table; table= next)
+  for (table= thd->temporary_tables; table; table= next)
   {
-    if (query // we might be out of memory, but this is not fatal 
-        && table->real_name[0] != '#') 
+    if (is_user_table(table)) 
     {
-      char *end_cur;
       /* Set pseudo_thread_id to be that of the processed table */
       thd->variables.pseudo_thread_id= tmpkeyval(thd, table);
       /* Loop forward through all tables within the sublist of
          common pseudo_thread_id to create single DROP query */
-      for (end_cur= end;
-           table && table->real_name[0] != '#' &&
+      for (s_query.length(stub_len);
+           table && is_user_table(table) &&
              tmpkeyval(thd, table) == thd->variables.pseudo_thread_id;
            table= next)
       {
-        end_cur= strxmov(end_cur, "`", table->table_cache_key, "`.`",
-                      table->real_name, "`,", NullS);
+        /*
+          We are going to add 4 ` around the db/table names and possible more
+          due to special characters in the names
+        */
+        append_identifier(thd, &s_query, table->table_cache_key,
strlen(table->table_cache_key));
+        s_query.q_append('.');
+        append_identifier(thd, &s_query, table->real_name,
+                          strlen(table->real_name));
+        s_query.q_append(',');
         next= table->next;
         close_temporary(table, 1);
       }
       thd->clear_error();
-      /* The -1 is to remove last ',' */
-      Query_log_event qinfo(thd, query, (ulong)(end_cur - query) - 1, 0, FALSE);
+      Query_log_event qinfo(thd, s_query.ptr(),
+                            s_query.length() - 1 /* to remove trailing ',' */,
+                            0, FALSE);
       /*
         Imagine the thread had created a temp table, then was doing a SELECT, and
         the SELECT was killed. Then it's not clever to mark the statement above as
@@ -623,6 +612,8 @@
       close_temporary(table, 1);
     }
   }
+  if (!was_quote_show)
+    thd->options &= ~OPTION_QUOTE_SHOW_CREATE; /* restore option */
   thd->temporary_tables=0;
 }
 

--- 1.14/mysql-test/r/rpl_temporary.result	2006-05-09 23:01:27 +03:00
+++ 1.15/mysql-test/r/rpl_temporary.result	2006-05-12 21:34:27 +03:00
@@ -89,14 +89,17 @@
 7
 drop table t1,t2;
 create temporary table t3 (f int);
-set @session.pseudo_thread_id=100;
+set @@session.pseudo_thread_id=100;
 create temporary table t101 (id int);
 create temporary table t102 (id int);
-set @session.pseudo_thread_id=200;
+set @@session.pseudo_thread_id=200;
 create temporary table t201 (id int);
-create temporary table `#not_user_table_prefixed_with_hash_sign_no_harm` (id int);
-set @con1_id=connection_id();
-kill @con1_id;
+create temporary table `t``201` (id int);
+create temporary table `#sql_not_user_table202` (id int);
+set @@session.pseudo_thread_id=300;
+create temporary table t301 (id int);
+create temporary table t302 (id int);
+create temporary table `#sql_not_user_table303` (id int);
 create table t1(f int);
 insert into t1 values (1);
 select * from t1 /* must be 1 */;

--- 1.16/mysql-test/t/rpl_temporary.test	2006-05-09 23:01:27 +03:00
+++ 1.17/mysql-test/t/rpl_temporary.test	2006-05-12 21:34:27 +03:00
@@ -135,14 +135,19 @@
 # value was set up at the moment of temp table creation
 #
 connection con1;
-set @session.pseudo_thread_id=100;
+set @@session.pseudo_thread_id=100;
 create temporary table t101 (id int);
 create temporary table t102 (id int);
-set @session.pseudo_thread_id=200;
+set @@session.pseudo_thread_id=200;
 create temporary table t201 (id int);
-create temporary table `#not_user_table_prefixed_with_hash_sign_no_harm` (id int);
-set @con1_id=connection_id();
-kill @con1_id;
+create temporary table `t``201` (id int);
+# emulate internal temp table not to come to binlog
+create temporary table `#sql_not_user_table202` (id int);
+set @@session.pseudo_thread_id=300;
+create temporary table t301 (id int);
+create temporary table t302 (id int);
+create temporary table `#sql_not_user_table303` (id int);
+disconnect con1;
 
 #now do something to show that slave is ok after DROP temp tables
 connection master;