SCRUM task

mysql-test/r/select.result:
  SELECT ... INTO user_variables
mysql-test/t/select.test:
  SELECT ... INTO user_variables
sql/sql_class.cc:
  SELECT ... INTO user_variables
sql/sql_class.h:
  SELECT ... INTO user_variables
sql/sql_lex.h:
  SELECT ... INTO user_variables
sql/sql_parse.cc:
  SELECT ... INTO user_variables
sql/sql_yacc.yy:
  SELECT ... INTO user_variables

mysql-test/r/select.result

@@ -3266,3 +3266,13 @@ select wss_type from t1 where wss_type =102935229216544093;
 wss_type
 102935229216544093
 drop table t1;
+select 1+2,"aaaa",3.13*2.0 into @a,@b,@c;
+select @a;
+@a
+3
+select @b;
+@b
+aaaa
+select @c;
+@c
+6.26

mysql-test/t/select.test

@@ -1751,3 +1751,7 @@ select wss_type from t1 where wss_type ='102935229216544104';
 select wss_type from t1 where wss_type ='102935229216544093';
 select wss_type from t1 where wss_type =102935229216544093;
 drop table t1;
+select 1+2,"aaaa",3.13*2.0 into @a,@b,@c;
+select @a;
+select @b;
+select @c;

sql/sql_class.cc

@@ -907,3 +907,47 @@ bool select_exists_subselect::send_data(List<Item> &items)
   DBUG_RETURN(0);
 }
 
+
+/***************************************************************************
+** Dump  of select to variables
+***************************************************************************/
+
+
+bool select_dumpvar::send_data(List<Item> &items)
+{
+  List_iterator_fast<Item> li(items);
+  List_iterator_fast<LEX_STRING> gl(current_thd->lex.select_into_var_list);
+  Item *item;
+  LEX_STRING *ls;
+  DBUG_ENTER("send_data");
+
+  if (row_count++ > 1) 
+  {
+    my_error(ER_TOO_MANY_ROWS, MYF(0));
+    goto err;
+  }
+  while ((item=li++) && (ls=gl++))
+  {
+    Item_func_set_user_var *xx = new Item_func_set_user_var(*ls,item);
+    xx->fix_fields(current_thd,(TABLE_LIST*) current_thd->lex.select_lex.table_list.first,&item);
+    xx->fix_length_and_dec();
+    xx->update();
+  }
+  DBUG_RETURN(0);
+err:
+  DBUG_RETURN(1);
+}
+
+bool select_dumpvar::send_eof()
+{
+  if (row_count)
+  {
+    ::send_ok(thd,row_count);
+    return 0;
+  }
+  else
+  {
+    my_error(ER_EMPTY_QUERY,MYF(0));
+    return 1;
+  }
+}

sql/sql_class.h

@@ -966,3 +966,25 @@ class Unique :public Sql_alloc
    bool send_eof();
  };
 
+class select_dumpvar :public select_result {
+  ha_rows row_count;
+public:
+  select_dumpvar(void)  { row_count=0;}
+  ~select_dumpvar() {}
+  int prepare(List<Item> &list, SELECT_LEX_UNIT *u) { return 0;}
+  bool send_fields(List<Item> &list, uint flag) 
+  { 
+    if (current_thd->lex.select_into_var_list.elements != list.elements)
+    {
+      my_error(ER_WRONG_NUMBER_OF_COLUMNS_IN_SELECT, MYF(0));
+      return 1;
+    }
+    return 0; 
+  }
+  bool send_data(List<Item> &items);
+  void send_error(uint errcode,const char *err)
+  {
+    my_message(errcode, err, MYF(0));
+  }
+  bool send_eof();
+};

sql/sql_lex.h

@@ -347,6 +347,7 @@ typedef struct st_lex
   List<List_item>     many_values;
   List<set_var_base>  var_list;
   List<Item>          param_list;
+  List<LEX_STRING>    select_into_var_list;
   SQL_LIST	      proc_list, auxilliary_table_list;
   TYPELIB	      *interval;
   create_field	      *last_field;

sql/sql_parse.cc

@@ -1449,25 +1449,36 @@ mysql_execute_command(THD *thd)
 	}
       }
     }
-    else if (!(result=new select_send()))
+    else if (lex->select_into_var_list.elements)
     {
-      res= -1;
-#ifdef DELETE_ITEMS
-      delete select_lex->having;
-      delete select_lex->where;
-#endif
-      break;
+      if (!(result=new select_dumpvar()))
+      {
+	res= -1;
+	break;
+      }
     }
-    else
+    else 
     {
-      /*
-	Normal select:
-	Change lock if we are using SELECT HIGH PRIORITY,
-	FOR UPDATE or IN SHARE MODE
-      */
-      TABLE_LIST *table;
-      for (table = tables ; table ; table=table->next)
-	table->lock_type= lex->lock_option;
+      if (!(result=new select_send()))
+      {
+	res= -1;
+#ifdef DELETE_ITEMS
+	delete select_lex->having;
+	delete select_lex->where;
+#endif
+	break;
+      }
+      else
+      {
+	/*
+	  Normal select:
+	  Change lock if we are using SELECT HIGH PRIORITY,
+	  FOR UPDATE or IN SHARE MODE
+	*/
+	TABLE_LIST *table;
+	for (table = tables ; table ; table=table->next)
+	  table->lock_type= lex->lock_option;
+      }
     }
 
     if (!(res=open_and_lock_tables(thd,tables)))
@@ -2966,6 +2977,7 @@ mysql_init_select(LEX *lex)
   select_lex->olap=   UNSPECIFIED_OLAP_TYPE;
   lex->exchange= 0;
   lex->proc_list.first= 0;
+  lex->select_into_var_list.empty();
 }
 
 

sql/sql_yacc.yy

@@ -523,7 +523,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 
 %type <lex_str>
 	IDENT TEXT_STRING REAL_NUM FLOAT_NUM NUM LONG_NUM HEX_NUM LEX_HOSTNAME
-	ULONGLONG_NUM field_ident select_alias ident ident_or_text UNDERSCORE_CHARSET
+	ULONGLONG_NUM field_ident select_alias ident ident_or_text  UNDERSCORE_CHARSET
 
 %type <lex_str_ptr>
 	opt_table_alias
@@ -632,7 +632,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	handler_rkey_function handler_read_or_scan
 	single_multi table_wild_list table_wild_one opt_wild union union_list
 	precision union_option opt_on_delete_item subselect_start opt_and
-	subselect_end
+	subselect_end select_var_list
 END_OF_INPUT
 
 %type <NONE>
@@ -1544,6 +1544,7 @@ select_part2:
 select_into:
 	limit_clause {}
 	| select_from
+        | opt_into
 	| opt_into select_from
 	| select_from opt_into;
 
@@ -2287,11 +2288,11 @@ select_part3:
 	  mysql_init_select(lex);
 	  lex->select->linkage= DERIVED_TABLE_TYPE;
 	}
-        select_options select_item_list select_intoto
+        select_options select_item_list select_intoto;
 
 select_intoto:
 	limit_clause {}
-	| select_from
+	| select_from;
 
 opt_outer:
 	/* empty */	{}
@@ -2544,8 +2545,20 @@ procedure_item:
 	      $2->set_name($1,(uint) ((char*) Lex->tok_end - $1));
 	  };
 
+select_var_list:
+	   select_var_list ',' '@' ident_or_text
+           {
+	     if (Lex->select_into_var_list.push_back((LEX_STRING*) sql_memdup(&$4,sizeof(LEX_STRING))))
+	       YYABORT;
+	   }
+           |  '@' ident_or_text
+           {
+	     if (Lex->select_into_var_list.push_back((LEX_STRING*) sql_memdup(&$2,sizeof(LEX_STRING))))
+	       YYABORT;
+	   };
+
 opt_into:
-	INTO OUTFILE TEXT_STRING
+        INTO OUTFILE TEXT_STRING
 	{
 	  if (!(Lex->exchange= new sql_exchange($3.str,0)))
 	    YYABORT;
@@ -2555,6 +2568,10 @@ opt_into:
 	{
 	  if (!(Lex->exchange= new sql_exchange($3.str,1)))
 	    YYABORT;
+	}
+        | INTO select_var_list
+	{
+	  current_thd->safe_to_cache_query=0;
 	};
 
 /*
@@ -3225,7 +3242,7 @@ param_marker:
             yyerror("You have an error in your SQL syntax");
             YYABORT;
           }
-        }
+        };
 literal:
 	text_literal	{ $$ =	$1; }
 	| NUM		{ $$ =	new Item_int($1.str, (longlong) atol($1.str),$1.length); }
@@ -3565,7 +3582,7 @@ option_value:
 	| PASSWORD FOR_SYM user equal text_or_password
 	  {
 	    Lex->var_list.push_back(new set_var_password($3,$5));
-	  }
+	  };
 
 internal_variable_name:
 	ident
@@ -3574,7 +3591,7 @@ internal_variable_name:
 	  if (!tmp)
 	    YYABORT;
 	  $$=tmp;
-	}
+	};
 
 isolation_types:
 	READ_SYM UNCOMMITTED_SYM	{ $$= ISO_READ_UNCOMMITTED; }
@@ -3933,7 +3950,7 @@ require_clause: /* empty */
 	| REQUIRE_SYM NONE_SYM
 	  {
 	    Lex->ssl_type=SSL_TYPE_NONE;
-	  }
+	  };
 
 grant_options:
 	/* empty */ {}
@@ -4076,4 +4093,4 @@ subselect_end:
 	{
 	  LEX *lex=Lex;
 	  lex->select = lex->select->outer_select();
-	}
+	};