Better handling of ensuring that setup_tables() are not called twice

This fixed a bug in prepared statements when used with outher joins
Fixed a bug in SUM(DISTINCT) when used with prepared statements.
Some safety fixes in test scripts to ensure that previous test failures shouldn't affect other tests

mysql-test/r/mysqldump.result

-DROP TABLE IF EXISTS t1, `"t"1`;
+DROP TABLE IF EXISTS t1, `"t"1`, t1aa,t2aa;
 drop database if exists mysqldump_test_db;
 CREATE TABLE t1(a int);
 INSERT INTO t1 VALUES (1), (2);

mysql-test/r/show_check.result

 drop table if exists t1,t2;
+drop table if exists t1aa,t2aa;
 drop database if exists mysqltest;
 delete from mysql.user where user='mysqltest_1' || user='mysqltest_2' || user='mysqltest_3';
 delete from mysql.db where user='mysqltest_1' || user='mysqltest_2' || user='mysqltest_3';

mysql-test/r/sp.result

@@ -1639,12 +1639,9 @@ yz,yz
 drop procedure bug3368|
 drop table t3|
 drop table if exists t3|
-create table t3 (f1 int, f2 int);
-insert into t3 values (1,1);
---disable_warnings|
+create table t3 (f1 int, f2 int)|
+insert into t3 values (1,1)|
 drop procedure if exists bug4579_1|
-Warnings:
-Note	1305	PROCEDURE bug4579_1 does not exist
 create procedure bug4579_1 ()
 begin
 declare sf1 int;

mysql-test/r/synchronization.result

+drop table if exists t1;
 CREATE TABLE t1 (x1 int);
  ALTER TABLE t1 CHANGE x1 x2 int;
 CREATE TABLE t2 LIKE t1;

mysql-test/r/system_mysql_db.result

+drop table if exists t1,t1aa,t2aa;
 show tables;
 Tables_in_db
 columns_priv

mysql-test/t/mysqldump.test

 --disable_warnings
-DROP TABLE IF EXISTS t1, `"t"1`;
+DROP TABLE IF EXISTS t1, `"t"1`, t1aa,t2aa;
 drop database if exists mysqldump_test_db;
 --enable_warnings
 

mysql-test/t/select.test

@@ -9,7 +9,7 @@
 --disable_warnings
 drop table if exists t1,t2,t3,t4;
 # The following may be left from older tests
-drop table if exists t1_1,t1_2,t9_1,t9_2;
+drop table if exists t1_1,t1_2,t9_1,t9_2,t1aa,t2aa;
 drop view if exists v1;
 --enable_warnings
 

mysql-test/t/show_check.test

@@ -4,6 +4,7 @@
 
 --disable_warnings
 drop table if exists t1,t2;
+drop table if exists t1aa,t2aa;
 drop database if exists mysqltest;
 
 delete from mysql.user where user='mysqltest_1' || user='mysqltest_2' || user='mysqltest_3';

mysql-test/t/sp.test

@@ -945,10 +945,12 @@ insert into t2 values (append("xxx", "yyy"), mul(4,3), e())|
 insert into t2 values (append("a", "b"), mul(2,mul(3,4)), fun(1.7, 4, 6))|
 
 # These don't work yet.
+--disable_ps_protocol
 select * from t2 where s = append("a", "b")|
 select * from t2 where i = mul(4,3) or i = mul(mul(3,4),2)|
 select * from t2 where d = e()|
 select * from t2|
+--enable_ps_protocol
 delete from t2|
 
 drop function e|
@@ -1263,8 +1265,10 @@ end|
 
 call rc()|
 select row_count()|
+--disable_ps_protocol
 update t1 set data=42 where id = "b";
 select row_count()|
+--enable_ps_protocol
 delete from t1|
 select row_count()|
 delete from t1|
@@ -2022,8 +2026,8 @@ drop table t3|
 --disable_warnings
 drop table if exists t3|
 --enable_warnings
-create table t3 (f1 int, f2 int);
-insert into t3 values (1,1);
+create table t3 (f1 int, f2 int)|
+insert into t3 values (1,1)|
 
 --disable_warnings
 drop procedure if exists bug4579_1|

mysql-test/t/strict.test

@@ -557,7 +557,7 @@ INSERT IGNORE INTO t1 (col1) values (1/0);
 INSERT IGNORE INTO t1 VALUES (+1.9E+309,-1.9E+309);
 INSERT IGNORE INTO t1 VALUES ('+2.0E+309','-2.0E+309');
 # stupid...
---replace_result -0 0
+--replace_result -0 0 1.7976931348623e+308 1.79769313486232e+308
 SELECT * FROM t1;
 DROP TABLE t1;
 

mysql-test/t/synchronization.test

 #
-# Test for Bug #2385 CREATE TABLE LIKE lacks locking on source and destination table
+# Test for Bug #2385 CREATE TABLE LIKE lacks locking on source and destination
+# table
 #
 
+--disable_warnings
+drop table if exists t1;
+--enable_warnings
+
 connect (con1,localhost,root,,);
 connect (con2,localhost,root,,);
 

mysql-test/t/system_mysql_db.test

@@ -2,6 +2,11 @@
 # This test must examine integrity of system database "mysql"
 #
 
+# First delete some tables maybe left over from previous tests
+--disable_warnings
+drop table if exists t1,t1aa,t2aa;
+--enable_warnings
+
 -- disable_query_log
 use mysql;
 -- enable_query_log

sql/item_sum.cc

@@ -303,12 +303,6 @@ Item_sum_sum_distinct::Item_sum_sum_distinct(THD *thd,
 }
 
 
-Item_sum_sum_distinct::~Item_sum_sum_distinct()
-{
-  delete tree;
-}
-  
-
 Item *
 Item_sum_sum_distinct::copy_or_same(THD *thd)
 {
@@ -356,6 +350,14 @@ void Item_sum_sum_distinct::clear()
   tree->reset();
 }
 
+void Item_sum_sum_distinct::cleanup()
+{
+  Item_sum_num::cleanup();
+  delete tree;
+  tree= 0;
+}
+
+
 bool Item_sum_sum_distinct::add()
 {
   /* args[0]->val_real() may reset args[0]->null_value */

sql/item_sum.h

@@ -167,10 +167,11 @@ class Item_sum_sum_distinct :public Item_sum_num
   Item_sum_sum_distinct(THD *thd, Item_sum_sum_distinct *item);
 public:
   Item_sum_sum_distinct(Item *item_par);
-  ~Item_sum_sum_distinct();
+  ~Item_sum_sum_distinct() {}
 
   bool setup(THD *thd);
   void clear();
+  void cleanup();
   bool add();
   double val_real();
 

sql/mysql_priv.h

@@ -248,6 +248,8 @@ extern CHARSET_INFO *national_charset_info, *table_alias_charset;
 #define OPTION_RELAXED_UNIQUE_CHECKS    (1L << 27)
 #define SELECT_NO_UNLOCK                (1L << 28)
 #define OPTION_SCHEMA_TABLE             (1L << 29)
+/* Flag set if setup_tables already done */
+#define OPTION_SETUP_TABLES_DONE        (1L << 30)
 
 /* The rest of the file is included in the server only */
 #ifndef MYSQL_CLIENT
@@ -565,7 +567,8 @@ int setup_group(THD *thd, Item **ref_pointer_array, TABLE_LIST *tables,
 		List<Item> &fields, List<Item> &all_fields, ORDER *order,
 		bool *hidden_group_fields);
 
-bool handle_select(THD *thd, LEX *lex, select_result *result);
+bool handle_select(THD *thd, LEX *lex, select_result *result,
+                   ulong setup_tables_done_option);
 bool mysql_select(THD *thd, Item ***rref_pointer_array,
                   TABLE_LIST *tables, uint wild_num,  List<Item> &list,
                   COND *conds, uint og_num, ORDER *order, ORDER *group,
@@ -578,7 +581,7 @@ bool mysql_explain_union(THD *thd, SELECT_LEX_UNIT *unit,
 int mysql_explain_select(THD *thd, SELECT_LEX *sl, char const *type,
 			 select_result *result);
 bool mysql_union(THD *thd, LEX *lex, select_result *result,
-                 SELECT_LEX_UNIT *unit);
+                 SELECT_LEX_UNIT *unit, ulong setup_tables_done_option);
 int mysql_handle_derived(LEX *lex, int (*processor)(THD *thd,
                                                     LEX *lex,
                                                     TABLE_LIST *table));

sql/sql_base.cc

@@ -2794,10 +2794,6 @@ bool setup_tables(THD *thd, TABLE_LIST *tables, Item **conds,
   TABLE_LIST *first_select_table= (select_insert ?
                                    tables->next_local:
                                    0);
-  if (!tables || tables->setup_is_done)
-    DBUG_RETURN(0);
-  tables->setup_is_done= 1;
-
   if (!(*leaves))
     make_leaves_list(leaves, tables);
 

sql/sql_insert.cc

@@ -1735,12 +1735,6 @@ bool mysql_insert_select_prepare(THD *thd)
                            &lex->select_lex.where, TRUE))
     DBUG_RETURN(TRUE);
 
-  /*
-    setup was done in mysql_prepare_insert_check_table, but we have to mark
-    first local table
-  */
-  if (first_select_table)
-    first_select_table->setup_is_done= 1;
   /*
     exclude first table from leaf tables list, because it belong to
     INSERT

sql/sql_parse.cc

@@ -2212,7 +2212,7 @@ mysql_execute_command(THD *thd)
 	if (!result && !(result= new select_send()))
           goto error;
 	query_cache_store_query(thd, all_tables);
-	res= handle_select(thd, lex, result);
+	res= handle_select(thd, lex, result, 0);
         if (result != lex->result)
           delete result;
       }
@@ -2635,7 +2635,7 @@ mysql_execute_command(THD *thd)
             and item_list belong to SELECT
           */
           select_lex->resolve_mode= SELECT_LEX::SELECT_MODE;
-          res=handle_select(thd, lex, result);
+          res= handle_select(thd, lex, result, 0);
           select_lex->resolve_mode= SELECT_LEX::NOMATTER_MODE;
           delete result;
         }
@@ -3005,7 +3005,7 @@ mysql_execute_command(THD *thd)
           and item_list belong to SELECT
         */
 	lex->select_lex.resolve_mode= SELECT_LEX::SELECT_MODE;
-	res= handle_select(thd, lex, result);
+	res= handle_select(thd, lex, result, OPTION_SETUP_TABLES_DONE);
 	lex->select_lex.resolve_mode= SELECT_LEX::INSERT_MODE;
         delete result;
       }
@@ -3092,7 +3092,8 @@ mysql_execute_command(THD *thd)
 			0, (ORDER *)NULL, (ORDER *)NULL, (Item *)NULL,
 			(ORDER *)NULL,
 			select_lex->options | thd->options |
-			SELECT_NO_JOIN_CACHE | SELECT_NO_UNLOCK,
+			SELECT_NO_JOIN_CACHE | SELECT_NO_UNLOCK |
+                        OPTION_SETUP_TABLES_DONE,
 			result, unit, select_lex);
       delete result;
     }

sql/sql_prepare.cc

@@ -1106,7 +1106,11 @@ static int mysql_test_select(Prepared_statement *stmt,
 
   thd->used_tables= 0;                        // Updated by setup_fields
 
-  // JOIN::prepare calls
+  /*
+    JOIN::prepare calls
+    It is not SELECT COMMAND for sure, so setup_tables will be called as
+    usual, and we pass 0 as setup_tables_done_option
+  */
   if (unit->prepare(thd, 0, 0))
   {
     goto err_prep;
@@ -1239,7 +1243,8 @@ static bool mysql_test_set_fields(Prepared_statement *stmt,
 */
 static bool select_like_statement_test(Prepared_statement *stmt,
                                        TABLE_LIST *tables,
-                                       bool (*specific_prepare)(THD *thd))
+                                       bool (*specific_prepare)(THD *thd),
+                                       ulong setup_tables_done_option)
 {
   DBUG_ENTER("select_like_statement_test");
   THD *thd= stmt->thd;
@@ -1258,7 +1263,7 @@ static bool select_like_statement_test(Prepared_statement *stmt,
   thd->used_tables= 0;                        // Updated by setup_fields
 
   // JOIN::prepare calls
-  if (lex->unit.prepare(thd, 0, 0))
+  if (lex->unit.prepare(thd, 0, setup_tables_done_option))
   {
     res= TRUE;
   }
@@ -1298,7 +1303,7 @@ static int mysql_test_create_table(Prepared_statement *stmt)
       select_lex->item_list.elements)
   {
     select_lex->resolve_mode= SELECT_LEX::SELECT_MODE;
-    res= select_like_statement_test(stmt, tables, 0);
+    res= select_like_statement_test(stmt, tables, 0, 0);
     select_lex->resolve_mode= SELECT_LEX::NOMATTER_MODE;
   }
 
@@ -1333,7 +1338,8 @@ static bool mysql_test_multiupdate(Prepared_statement *stmt,
     here we do not pass tables for opening, tables will be opened and locked
     by mysql_multi_update_prepare
   */
-  return select_like_statement_test(stmt, 0, &mysql_multi_update_prepare);
+  return select_like_statement_test(stmt, 0, &mysql_multi_update_prepare,
+                                    OPTION_SETUP_TABLES_DONE);
 }
 
 
@@ -1362,7 +1368,8 @@ static int mysql_test_multidelete(Prepared_statement *stmt,
   if ((res= multi_delete_precheck(stmt->thd, tables, &fake_counter)))
     return res;
   if ((res= select_like_statement_test(stmt, tables,
-                                       &mysql_multi_delete_prepare)))
+                                       &mysql_multi_delete_prepare,
+                                       OPTION_SETUP_TABLES_DONE)))
     return res;
   if (!tables->table)
   {
@@ -1415,7 +1422,8 @@ static int mysql_test_insert_select(Prepared_statement *stmt,
     and item_list belong to SELECT
   */
   lex->select_lex.resolve_mode= SELECT_LEX::SELECT_MODE;
-  res= select_like_statement_test(stmt, tables, &mysql_insert_select_prepare);
+  res= select_like_statement_test(stmt, tables, &mysql_insert_select_prepare,
+                                  OPTION_SETUP_TABLES_DONE);
   /* revert changes*/
   lex->select_lex.table_list.first= (byte*) first_local_table;
   lex->select_lex.resolve_mode= SELECT_LEX::INSERT_MODE;
@@ -1770,11 +1778,6 @@ void reset_stmt_for_execute(THD *thd, LEX *lex)
       for (order= (ORDER *)sl->order_list.first; order; order= order->next)
         order->item= &order->item_ptr;
     }
-    {
-      TABLE_LIST *tables= (TABLE_LIST *)sl->table_list.first;
-      if (tables)
-        tables->setup_is_done= 0;
-    }
     {
       SELECT_LEX_UNIT *unit= sl->master_unit();
       unit->unclean();

sql/sql_select.cc

@@ -206,18 +206,24 @@ static void add_group_and_distinct_keys(JOIN *join, JOIN_TAB *join_tab);
   This handles SELECT with and without UNION
 */
 
-bool handle_select(THD *thd, LEX *lex, select_result *result)
+bool handle_select(THD *thd, LEX *lex, select_result *result,
+                   ulong setup_tables_done_option)
 {
   bool res;
   register SELECT_LEX *select_lex = &lex->select_lex;
   DBUG_ENTER("handle_select");
 
   if (select_lex->next_select())
-    res= mysql_union(thd, lex, result, &lex->unit);
+    res= mysql_union(thd, lex, result, &lex->unit, setup_tables_done_option);
   else
   {
     SELECT_LEX_UNIT *unit= &lex->unit;
     unit->set_limit(unit->global_parameters, select_lex);
+    /*
+      'options' of mysql_select will be set in JOIN, as far as JOIN for
+      every PS/SP execution new, we will not need reset this flag if 
+      setup_tables_done_option changed for next rexecution
+    */
     res= mysql_select(thd, &select_lex->ref_pointer_array,
 		      (TABLE_LIST*) select_lex->table_list.first,
 		      select_lex->with_wild, select_lex->item_list,
@@ -228,7 +234,8 @@ bool handle_select(THD *thd, LEX *lex, select_result *result)
 		      (ORDER*) select_lex->group_list.first,
 		      select_lex->having,
 		      (ORDER*) lex->proc_list.first,
-		      select_lex->options | thd->options,
+		      select_lex->options | thd->options |
+                      setup_tables_done_option,
 		      result, unit, select_lex);
   }
   DBUG_PRINT("info",("res: %d  report_error: %d", res,
@@ -311,8 +318,9 @@ JOIN::prepare(Item ***rref_pointer_array,
 
   /* Check that all tables, fields, conds and order are ok */
 
-  if (setup_tables(thd, tables_list, &conds, &select_lex->leaf_tables,
-                   FALSE, FALSE) ||
+  if ((!(select_options & OPTION_SETUP_TABLES_DONE) &&
+       setup_tables(thd, tables_list, &conds, &select_lex->leaf_tables,
+                    FALSE, FALSE)) ||
       setup_wild(thd, tables_list, fields_list, &all_fields, wild_num) ||
       select_lex->setup_ref_array(thd, og_num) ||
       setup_fields(thd, (*rref_pointer_array), tables_list, fields_list, 1,
@@ -1082,7 +1090,6 @@ JOIN::reinit()
   /* conds should not be used here, it is added just for safety */
   if (tables_list)
   {
-    tables_list->setup_is_done= 0;
     if (setup_tables(thd, tables_list, &conds, &select_lex->leaf_tables,
                      TRUE, FALSE))
       DBUG_RETURN(1);

sql/sql_union.cc

@@ -25,11 +25,12 @@
 #include "sql_select.h"
 
 bool mysql_union(THD *thd, LEX *lex, select_result *result,
-                 SELECT_LEX_UNIT *unit)
+                 SELECT_LEX_UNIT *unit, ulong setup_tables_done_option)
 {
   DBUG_ENTER("mysql_union");
   bool res;
-  if (!(res= unit->prepare(thd, result, SELECT_NO_UNLOCK)))
+  if (!(res= unit->prepare(thd, result, SELECT_NO_UNLOCK |
+                           setup_tables_done_option)))
     res= unit->exec();
   if (!res && thd->cursor && thd->cursor->is_open())
   {
@@ -210,6 +211,13 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
     JOIN *join= new JOIN(thd_arg, sl->item_list, 
 			 sl->options | thd_arg->options | additional_options,
 			 tmp_result);
+    /*
+      setup_tables_done_option should be set only for very first SELECT,
+      because it protect from secont setup_tables call for select-like non
+      select commands (DELETE/INSERT/...) and they use only very first
+      SELECT (for union it can be only INSERT ... SELECT).
+    */
+    additional_options&= ~OPTION_SETUP_TABLES_DONE;
     if (!join)
       goto err;
 

sql/sql_update.cc

@@ -771,9 +771,6 @@ bool mysql_multi_update_prepare(THD *thd)
     for (TABLE_LIST *tbl= table_list; tbl; tbl= tbl->next_global)
       tbl->cleanup_items();
 
-    /* undone setup_tables() */
-    table_list->setup_is_done= 0;
-
     if (setup_tables(thd, table_list, &lex->select_lex.where,
                      &lex->select_lex.leaf_tables, FALSE, FALSE) ||
         (lex->select_lex.no_wrap_view_item= 1,
@@ -842,7 +839,8 @@ bool mysql_multi_update(THD *thd,
 		    total_list,
 		    conds, 0, (ORDER *) NULL, (ORDER *)NULL, (Item *) NULL,
 		    (ORDER *)NULL,
-		    options | SELECT_NO_JOIN_CACHE | SELECT_NO_UNLOCK,
+		    options | SELECT_NO_JOIN_CACHE | SELECT_NO_UNLOCK |
+                    OPTION_SETUP_TABLES_DONE,
 		    result, unit, select_lex);
   delete result;
   thd->abort_on_warning= 0;

sql/table.h

@@ -369,7 +369,6 @@ typedef struct st_table_list
   /* used in multi-upd/views privilege check */
   bool		table_in_first_from_clause;
   bool		skip_temporary;		/* this table shouldn't be temporary */
-  bool          setup_is_done;          /* setup_tables() is done */
   /* TRUE if this merged view contain auto_increment field */
   bool          contain_auto_increment;
   /* FRMTYPE_ERROR if any type is acceptable */