Limit created keys to MAX_KEY_LENGTH.

Fix problem with query cache and database names

mysql-test/mysql-test-run.sh

@@ -347,7 +347,7 @@ fi
 [ -d $MYSQL_TEST_DIR/var/tmp ] || mkdir $MYSQL_TEST_DIR/var/tmp
 [ -d $MYSQL_TEST_DIR/var/run ] || mkdir $MYSQL_TEST_DIR/var/run
 
-[ -z "$COLUMNS" ] && COLUMNS=80
+if test ${COLUMNS:-0} -lt 80 ; then COLUMNS=80 ; fi
 E=`$EXPR $COLUMNS - 8`
 DASH72=`$ECHO '------------------------------------------------------------------------'|$CUT -c 1-$E`
 
@@ -605,6 +605,7 @@ start_manager()
 {
  if [ $USE_MANAGER = 0 ] ; then
    echo "Manager disabled, skipping manager start."
+   $RM -f $MYSQL_MANAGER_LOG
   return
  fi
  $ECHO "Starting MySQL Manager"
@@ -675,7 +676,7 @@ manager_term()
   shift
   if [ $USE_MANAGER = 0 ] ; then
     $MYSQLADMIN --no-defaults -uroot --socket=$MYSQL_TMP_DIR/$ident.sock -O \
-    connect_timeout=5 -O shutdown_timeout=20 shutdown >/dev/null 2>&1
+    connect_timeout=5 -O shutdown_timeout=20 shutdown >> $MYSQL_MANAGER_LOG 2>&1
     return
   fi
   $MYSQL_MANAGER_CLIENT $MANAGER_QUIET_OPT --user=$MYSQL_MANAGER_USER \

mysql-test/r/query_cache.result

@@ -2,7 +2,7 @@ flush query cache;
 flush query cache;
 reset query cache;
 flush status;
-drop table if exists t1,t2,t3,t11,t21;
+drop table if exists t1,t2,t3,t11,t21, mysqltest.t1;
 create table t1 (a int not null);
 insert into t1 values (1),(2),(3);
 select * from t1;
@@ -346,7 +346,7 @@ show status like "Qcache_queries_in_cache";
 Variable_name	Value
 Qcache_queries_in_cache	0
 drop table t1,t2;
-create database mysqltest;
+create database if not exists mysqltest;
 create table mysqltest.t1 (i int not null auto_increment, a int, primary key (i));
 insert into mysqltest.t1 (a) values (1);
 select * from mysqltest.t1 where i is null;
@@ -375,6 +375,36 @@ set CHARACTER SET DEFAULT;
 show status like "Qcache_queries_in_cache";
 Variable_name	Value
 Qcache_queries_in_cache	2
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	4
+drop table t1;
+create database if not exists mysqltest;
+create table mysqltest.t1 (i int not null);
+create table t1 (i int not null);
+insert into mysqltest.t1 (i) values (1);
+insert into t1 (i) values (2);
+select * from t1;
+i
+2
+use mysqltest;
+select * from t1;
+i
+1
+select * from t1;
+i
+1
+use test;
+select * from t1;
+i
+2
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	2
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	6
+drop database mysqltest;
 drop table t1;
 flush query cache;
 reset query cache;

mysql-test/t/query_cache.test

@@ -8,7 +8,7 @@ flush query cache; # This crashed in some versions
 flush query cache; # This crashed in some versions
 reset query cache;
 flush status;
-drop table if exists t1,t2,t3,t11,t21;
+drop table if exists t1,t2,t3,t11,t21, mysqltest.t1;
 
 #
 # First simple test
@@ -235,7 +235,7 @@ drop table t1,t2;
 #
 # noncachable ODBC work around (and prepare cache for drop database)
 #
-create database mysqltest;
+create database if not exists mysqltest;
 create table mysqltest.t1 (i int not null auto_increment, a int, primary key (i));
 insert into mysqltest.t1 (a) values (1);
 select * from mysqltest.t1 where i is null;
@@ -258,6 +258,7 @@ set CHARACTER SET cp1251_koi8;
 select * from t1;
 set CHARACTER SET DEFAULT;
 show status like "Qcache_queries_in_cache";
+show status like "Qcache_hits";
 drop table t1;
 
 # The following tests can't be done as the values differen on 32 and 64 bit
@@ -265,6 +266,27 @@ drop table t1;
 #show variables like "query_cache_size";
 #show status like "Qcache_free_memory";
 
+#
+# same tables in different db
+#
+create database if not exists mysqltest;
+create table mysqltest.t1 (i int not null);
+create table t1 (i int not null);
+insert into mysqltest.t1 (i) values (1);
+insert into t1 (i) values (2);
+
+select * from t1;
+use mysqltest;
+select * from t1;
+select * from t1;
+use test;
+select * from t1;
+show status like "Qcache_queries_in_cache";
+show status like "Qcache_hits";
+
+drop database mysqltest;
+drop table t1;
+
 #
 # Test insert delayed
 #

sql-bench/test-wisconsin.sh

@@ -242,7 +242,7 @@ sub init_data
 {
   @onek=
     $server->create("onek",
-		    ["unique1 int(4) NOT NULL",
+		    ["unique1 int(5) NOT NULL",
 		     "unique2 int(4) NOT NULL",
 		     "two int(4)",
 		     "four int(4)",

sql/sql_cache.cc

@@ -743,7 +743,7 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
     /* Key is query + database + flag */
     if (thd->db_length)
     {
-      memcpy(thd->query+thd->query_length, thd->db, thd->db_length);
+      memcpy(thd->query+thd->query_length+1, thd->db, thd->db_length);
       DBUG_PRINT("qcache", ("database : %s length %u",
 			    thd->db, thd->db_length)); 
     }
@@ -761,7 +761,7 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
       flags|= (byte) thd->convert_set->number();
       DBUG_ASSERT(thd->convert_set->number() < 128);
     }
-    tot_length=thd->query_length+1+thd->db_length;
+    tot_length=thd->query_length+thd->db_length+2;
     thd->query[tot_length-1] = (char) flags;
 
     /* Check if another thread is processing the same query? */
@@ -832,7 +832,6 @@ void Query_cache::store_query(THD *thd, TABLE_LIST *tables_used)
     statistic_increment(refused, &structure_guard_mutex);
 
 end:
-  thd->query[thd->query_length]= 0;		// Restore end null
   DBUG_VOID_RETURN;
 }
 
@@ -890,12 +889,10 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
     goto err;
   }
 
-  /* Test if the query is a SELECT */
-  while (*sql == ' ' || *sql == '\t')
-  {
-    sql++;
-    query_length--;
-  }
+  /*
+    Test if the query is a SELECT
+    (pre-space is removed in dispatch_command)
+  */
   if (toupper(sql[0]) != 'S' || toupper(sql[1]) != 'E' ||
       toupper(sql[2]) !='L')
   {
@@ -911,10 +908,10 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
   }
   Query_cache_block *query_block;
 
-  tot_length=query_length+thd->db_length+1;
+  tot_length=query_length+thd->db_length+2;
   if (thd->db_length)
   {
-    memcpy(sql+query_length, thd->db, thd->db_length);
+    memcpy(sql+query_length+1, thd->db, thd->db_length);
     DBUG_PRINT("qcache", ("database: '%s' length %u",
 			  thd->db, thd->db_length));
   }
@@ -936,9 +933,6 @@ Query_cache::send_result_to_client(THD *thd, char *sql, uint query_length)
   sql[tot_length-1] = (char) flags;
   query_block = (Query_cache_block *)  hash_search(&queries, (byte*) sql,
 						   tot_length);
-  
-  sql[query_length] = '\0';			// Restore end null
-
   /* Quick abort on unlocked data */
   if (query_block == 0 ||
       query_block->query()->result() == 0 ||
@@ -2582,8 +2576,11 @@ my_bool Query_cache::move_by_type(byte **border,
     pthread_cond_init(&new_query->lock, NULL);
     pthread_mutex_init(&new_query->clients_guard,MY_MUTEX_INIT_FAST);
 
+    /* 
+      If someone is writing to this block, inform the writer that the block
+      has been moved.
+    */
     NET *net = new_block->query()->writer();
-    /* QQ: When could this happen ? */
     if (net != 0)
     {
       net->query_cache_query= (gptr) new_block;
@@ -2877,15 +2874,17 @@ void Query_cache::queries_dump()
     {
       uint len;
       char *str = (char*) query_cache_query_get_key((byte*) block, &len, 0);
-      uint flags = (uint) (uchar) str[len-1];
-      DBUG_PRINT("qcache", ("%u (%u,%u) %.*s",len,
+      len--;					// Point at flags
+      uint flags = (uint) (uchar) str[len];
+      str[len]=0;
+      DBUG_PRINT("qcache", ("%u (%u,%u) '%s' '%s'",
 			  ((flags & QUERY_CACHE_CLIENT_LONG_FLAG_MASK)? 1:0),
-			  (flags & QUERY_CACHE_CHARSET_CONVERT_MASK), len-1,
-			    str));
+			  (flags & QUERY_CACHE_CHARSET_CONVERT_MASK), len,
+			    str,strend(str)+1));
       DBUG_PRINT("qcache", ("-b- 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx", (ulong) block,
 			    (ulong) block->next, (ulong) block->prev,
 			    (ulong)block->pnext, (ulong)block->pprev));
-
+      str[len]=(char) flags;
       for (TABLE_COUNTER_TYPE t = 0; t < block->n_tables; t++)
       {
 	Query_cache_table *table = block->table(t)->parent;

sql/sql_parse.cc

@@ -840,25 +840,32 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
 
   case COM_QUERY:
   {
-    char *pos=packet-1+packet_length;		// Point at end null
-    /* Remove garage at end of query */
+    packet_length--;				// Remove end null
+    /* Remove garage at start and end of query */
+    while (isspace(packet[0]) && packet_length > 0)
+    {
+      packet++;
+      packet_length--;
+    }
+    char *pos=packet+packet_length;		// Point at end null
     while (packet_length > 0 && (pos[-1] == ';' || isspace(pos[-1])))
     {
       pos--;
       packet_length--;
     }
-    thd->query_length= packet_length;
+    /* We must allocate some extra memory for query cache */
     if (!(thd->query= (char*) thd->memdup_w_gap((gptr) (packet),
-						packet_length+1,
-						thd->db_length+1)))
+						packet_length,
+						thd->db_length+2)))
       break;
     thd->query[packet_length]=0;
     thd->packet.shrink(net_buffer_length);	// Reclaim some memory
     if (!(specialflag & SPECIAL_NO_PRIOR))
       my_pthread_setprio(pthread_self(),QUERY_PRIOR);
     mysql_log.write(thd,command,"%s",thd->query);
-    DBUG_PRINT("query",("%s",thd->query));
-    mysql_parse(thd,thd->query,packet_length-1);
+    DBUG_PRINT("query",("'%s'",thd->query));
+    /* thd->query_length is set by mysql_parse() */
+    mysql_parse(thd,thd->query,packet_length);
     if (!(specialflag & SPECIAL_NO_PRIOR))
       my_pthread_setprio(pthread_self(),WAIT_PRIOR);
     DBUG_PRINT("info",("query ready"));

sql/sql_table.cc

@@ -558,9 +558,10 @@ int mysql_create_table(THD *thd,const char *db, const char *table_name,
       }
     }
     key_info->key_length=(uint16) key_length;
-    if (key_length > file->max_key_length() && key->type != Key::FULLTEXT)
+    uint max_key_length= max(file->max_key_length(), MAX_KEY_LENGTH);
+    if (key_length > max_key_length && key->type != Key::FULLTEXT)
     {
-      my_error(ER_TOO_LONG_KEY,MYF(0),file->max_key_length());
+      my_error(ER_TOO_LONG_KEY,MYF(0),max_key_length);
       DBUG_RETURN(-1);
     }
   }