making the keyword ROW for row items optional

mysql-test/r/row.result

 drop table if exists t1;
-select row(1,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3));
-row(1,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3))
+select (1,2,3) IN ((3,2,3), (1,2,3), (1,3,3));
+(1,2,3) IN ((3,2,3), (1,2,3), (1,3,3))
 1
 select row(10,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3));
 row(10,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3))
@@ -32,14 +32,23 @@ NULL
 select row('b',1.5,3) IN (row('b',NULL,4), row('a',1.5,3), row(1,3,3));
 row('b',1.5,3) IN (row('b',NULL,4), row('a',1.5,3), row(1,3,3))
 0
-select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,4)));
-row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,4)))
+select (1,2,(3,4)) IN ((3,2,(3,4)), (1,2,(3,4)));
+(1,2,(3,4)) IN ((3,2,(3,4)), (1,2,(3,4)))
 1
 select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,4));
 Cardinality error (more/less than 2 columns)
 select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)));
 row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)))
 NULL
+SELECT (1,2,3)=(0,NULL,3);
+(1,2,3)=(0,NULL,3)
+0
+SELECT (1,2,3)=(1,NULL,3);
+(1,2,3)=(1,NULL,3)
+NULL
+SELECT (1,2,3)=(1,NULL,0);
+(1,2,3)=(1,NULL,0)
+NULL
 SELECT ROW(1,2,3)=ROW(1,2,3);
 ROW(1,2,3)=ROW(1,2,3)
 1
@@ -132,4 +141,6 @@ select 1 from t1 where ROW(1,1);
 Cardinality error (more/less than 1 columns)
 select count(*) from t1 order by ROW(1,1);
 Cardinality error (more/less than 1 columns)
+select count(*) from t1 having (1,1) order by i;
+Cardinality error (more/less than 1 columns)
 drop table t1;

mysql-test/t/row.test

@@ -3,7 +3,7 @@
 drop table if exists t1;
 --enable_warnings
 
-select row(1,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3));
+select (1,2,3) IN ((3,2,3), (1,2,3), (1,3,3));
 select row(10,2,3) IN (row(3,2,3), row(1,2,3), row(1,3,3));
 select row(1,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3));
 select row(10,2,3) IN (row(3,NULL,3), row(1,2,3), row(1,3,3));
@@ -14,11 +14,16 @@ select row('a',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3));
 select row('b',1.5,3) IN (row(3,NULL,3), row('a',1.5,3), row(1,3,3));
 select row('b',1.5,3) IN (row('b',NULL,3), row('a',1.5,3), row(1,3,3));
 select row('b',1.5,3) IN (row('b',NULL,4), row('a',1.5,3), row(1,3,3));
-select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,4)));
+select (1,2,(3,4)) IN ((3,2,(3,4)), (1,2,(3,4)));
 -- error 1239
 select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,4));
 select row(1,2,row(3,4)) IN (row(3,2,row(3,4)), row(1,2,row(3,NULL)));
 
+SELECT (1,2,3)=(0,NULL,3);
+SELECT (1,2,3)=(1,NULL,3);
+# here's something for Sanja to fix :)
+SELECT (1,2,3)=(1,NULL,0);
+
 SELECT ROW(1,2,3)=ROW(1,2,3);
 SELECT ROW(2,2,3)=ROW(1+1,2,3);
 SELECT ROW(1,2,3)=ROW(1+1,2,3);
@@ -58,9 +63,7 @@ create table t1 (i int);
 select 1 from t1 where ROW(1,1);
 -- error 1239
 select count(*) from t1 order by ROW(1,1);
-#TODO remove comments after parser fixing
-#-- error 1239
-#select count(*) from t1 order by i having (1,1);
-#-- error 1239
-#select 1 from t1 limit (1,1), (1,1);
+-- error 1239
+select count(*) from t1 having (1,1) order by i;
 drop table t1;
+

sql/item.h

@@ -580,12 +580,12 @@ class Item_int_with_ref :public Item_int
 #include "spatial.h"
 #include "item_sum.h"
 #include "item_func.h"
+#include "item_row.h"
 #include "item_cmpfunc.h"
 #include "item_strfunc.h"
 #include "item_timefunc.h"
 #include "item_uniq.h"
 #include "item_subselect.h"
-#include "item_row.h"
 
 class Item_copy_string :public Item
 {

sql/item_cmpfunc.cc

@@ -392,51 +392,44 @@ longlong Item_func_strcmp::val_int()
   return !value ? 0 : (value < 0 ? (longlong) -1 : (longlong) 1);
 }
 
-
 void Item_func_interval::fix_length_and_dec()
 {
-  bool nums=1;
-  uint i;
-  for (i=0 ; i < arg_count ; i++)
+  if (row->cols() > 8)
   {
-    if (!args[i])
-      return;					// End of memory
-    if (args[i]->type() != Item::INT_ITEM &&
-	args[i]->type() != Item::REAL_ITEM)
+    bool consts=1;
+
+    for (uint i=1 ; consts && i < row->cols() ; i++)
     {
-      nums=0;
-      break;
+      consts&= row->el(i)->const_item();
     }
-  }
-  if (nums && arg_count >= 8)
-  {
-    if ((intervals=(double*) sql_alloc(sizeof(double)*arg_count)))
+
+    if (consts &&
+        (intervals=(double*) sql_alloc(sizeof(double)*(row->cols()-1))))
     {
-      for (i=0 ; i < arg_count ; i++)
-	intervals[i]=args[i]->val();
+      for (uint i=1 ; i < row->cols(); i++)
+        intervals[i-1]=row->el(i)->val();
     }
   }
   maybe_null= 0;
   max_length= 2;
-  used_tables_cache|=item->used_tables();
 }
 
 /*
   return -1 if null value,
 	  0 if lower than lowest
-	  1 - arg_count if between args[n] and args[n+1]
-	  arg_count+1 if higher than biggest argument
+	  1 - arg_count-1 if between args[n] and args[n+1]
+	  arg_count if higher than biggest argument
 */
 
 longlong Item_func_interval::val_int()
 {
-  double value=item->val();
-  if (item->null_value)
-    return -1;				// -1 if null /* purecov: inspected */
+  double value=row->el(0)->val();
+  if (row->el(0)->null_value)
+    return -1;				// -1 if null
   if (intervals)
   {					// Use binary search to find interval
     uint start,end;
-    start=0; end=arg_count-1;
+    start=1; end=row->cols()-2;
     while (start != end)
     {
       uint mid=(start+end+1)/2;
@@ -447,31 +440,14 @@ longlong Item_func_interval::val_int()
     }
     return (value < intervals[start]) ? 0 : start+1;
   }
-  if (args[0]->val() > value)
-    return 0;
-  for (uint i=1 ; i < arg_count ; i++)
+
+  uint i;
+  for (i=1 ; i < row->cols() ; i++)
   {
-    if (args[i]->val() > value)
-      return i;
+    if (row->el(i)->val() > value)
+      return i-1;
   }
-  return (longlong) arg_count;
-}
-
-
-void Item_func_interval::update_used_tables()
-{
-  Item_func::update_used_tables();
-  item->update_used_tables();
-  used_tables_cache|=item->used_tables();
-  const_item_cache&=item->const_item();
-}
-
-bool Item_func_interval::check_loop(uint id)
-{
-  DBUG_ENTER("Item_func_interval::check_loop");
-  if (Item_func::check_loop(id))
-    DBUG_RETURN(1);
-  DBUG_RETURN(item->check_loop(id));
+  return i-1;
 }
 
 void Item_func_between::fix_length_and_dec()

sql/item_cmpfunc.h

@@ -267,27 +267,14 @@ class Item_func_strcmp :public Item_bool_func2
 
 class Item_func_interval :public Item_int_func
 {
-  Item *item;
+  Item_row *row;
   double *intervals;
 public:
-  Item_func_interval(Item *a,List<Item> &list)
-    :Item_int_func(list),item(a),intervals(0) {}
+  Item_func_interval(Item_row *a)
+    :Item_int_func(a),row(a),intervals(0) { allowed_arg_cols= a->cols(); }
   longlong val_int();
-  bool fix_fields(THD *thd, struct st_table_list *tlist, Item **ref)
-  {
-    return (item->fix_fields(thd, tlist, &item) || item->check_cols(1) ||
-	    Item_func::fix_fields(thd, tlist, ref));
-  }
   void fix_length_and_dec();
-  ~Item_func_interval() { delete item; }
   const char *func_name() const { return "interval"; }
-  void update_used_tables();
-  bool check_loop(uint id);
-  void set_outer_resolving()
-  {
-    item->set_outer_resolving();
-    Item_func::set_outer_resolving();
-  }
 };
 
 

sql/sql_yacc.yy

@@ -587,7 +587,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	literal text_literal insert_ident order_ident
 	simple_ident select_item2 expr opt_expr opt_else sum_expr in_sum_expr
 	table_wild opt_pad no_in_expr expr_expr simple_expr no_and_expr
-	using_list expr_or_default set_expr_or_default
+	using_list expr_or_default set_expr_or_default interval_expr
 	param_marker singlerow_subselect singlerow_subselect_init
 	exists_subselect exists_subselect_init
 
@@ -1928,10 +1928,10 @@ expr_expr:
         | expr '^' expr		{ $$= new Item_func_bit_xor($1,$3); }
 	| expr '&' expr		{ $$= new Item_func_bit_and($1,$3); }
 	| expr '%' expr		{ $$= new Item_func_mod($1,$3); }
-	| expr '+' INTERVAL_SYM expr interval
-	  { $$= new Item_date_add_interval($1,$4,$5,0); }
-	| expr '-' INTERVAL_SYM expr interval
-	  { $$= new Item_date_add_interval($1,$4,$5,1); }
+	| expr '+' interval_expr interval
+	  { $$= new Item_date_add_interval($1,$3,$4,0); }
+	| expr '-' interval_expr interval
+	  { $$= new Item_date_add_interval($1,$3,$4,1); }
 	| expr COLLATE_SYM collation_name
 	  { $$= new Item_func_set_collation($1,$3); };
 
@@ -1975,10 +1975,10 @@ no_in_expr:
 	| no_in_expr '&' expr		{ $$= new Item_func_bit_and($1,$3); }
 	| no_in_expr '%' expr		{ $$= new Item_func_mod($1,$3); }
 	| no_in_expr MOD_SYM expr	{ $$= new Item_func_mod($1,$3); }
-	| no_in_expr '+' INTERVAL_SYM expr interval
-	  { $$= new Item_date_add_interval($1,$4,$5,0); }
-	| no_in_expr '-' INTERVAL_SYM expr interval
-	  { $$= new Item_date_add_interval($1,$4,$5,1); }
+	| no_in_expr '+' interval_expr interval
+	  { $$= new Item_date_add_interval($1,$3,$4,0); }
+	| no_in_expr '-' interval_expr interval
+	  { $$= new Item_date_add_interval($1,$3,$4,1); }
 	| simple_expr;
 
 /* expressions that begin with 'expr' that does NOT follow AND */
@@ -2030,12 +2030,16 @@ no_and_expr:
 	| no_and_expr '&' expr		{ $$= new Item_func_bit_and($1,$3); }
 	| no_and_expr '%' expr		{ $$= new Item_func_mod($1,$3); }
 	| no_and_expr MOD_SYM expr	{ $$= new Item_func_mod($1,$3); }
-	| no_and_expr '+' INTERVAL_SYM expr interval
-	  { $$= new Item_date_add_interval($1,$4,$5,0); }
-	| no_and_expr '-' INTERVAL_SYM expr interval
-	  { $$= new Item_date_add_interval($1,$4,$5,1); }
+	| no_and_expr '+' interval_expr interval
+	  { $$= new Item_date_add_interval($1,$3,$4,0); }
+	| no_and_expr '-' interval_expr interval
+	  { $$= new Item_date_add_interval($1,$3,$4,1); }
 	| simple_expr;
 
+interval_expr:
+         INTERVAL_SYM expr { $$=$2 }
+        ;
+
 simple_expr:
 	simple_ident
 	| literal
@@ -2061,8 +2065,11 @@ simple_expr:
 	| NOT expr %prec NEG	{ $$= new Item_func_not($2); }
 	| '!' expr %prec NEG	{ $$= new Item_func_not($2); }
 	| '(' expr ')'		{ $$= $2; }
-          /* Note: In SQL-99 "ROW" is optional, but not having it mandatory
-	     causes conflicts with the INTERVAL syntax. */
+	| '(' expr ',' expr_list ')'
+	  {
+	    $4->push_front($2);
+	    $$= new Item_row(*$4);
+	  }
 	| ROW_SYM '(' expr ',' expr_list ')'
 	  {
 	    $5->push_front($3);
@@ -2118,10 +2125,10 @@ simple_expr:
 	    $$= new Item_func_curtime($3);
 	    Lex->safe_to_cache_query=0;
 	  }
-	| DATE_ADD_INTERVAL '(' expr ',' INTERVAL_SYM expr interval ')'
-	  { $$= new Item_date_add_interval($3,$6,$7,0); }
-	| DATE_SUB_INTERVAL '(' expr ',' INTERVAL_SYM expr interval ')'
-	  { $$= new Item_date_add_interval($3,$6,$7,1); }
+	| DATE_ADD_INTERVAL '(' expr ',' interval_expr interval ')'
+	  { $$= new Item_date_add_interval($3,$5,$6,0); }
+	| DATE_SUB_INTERVAL '(' expr ',' interval_expr interval ')'
+	  { $$= new Item_date_add_interval($3,$5,$6,1); }
 	| DATABASE '(' ')'
 	  {
 	    $$= new Item_func_database();
@@ -2181,11 +2188,18 @@ simple_expr:
 	  { $$= new Item_func_if($3,$5,$7); }
 	| INSERT '(' expr ',' expr ',' expr ',' expr ')'
 	  { $$= new Item_func_insert($3,$5,$7,$9); }
-	| INTERVAL_SYM expr interval '+' expr
+	| interval_expr interval '+' expr
 	  /* we cannot put interval before - */
-	  { $$= new Item_date_add_interval($5,$2,$3,0); }
-	| INTERVAL_SYM '(' expr ',' expr_list ')'
-	  { $$= new Item_func_interval($3,* $5); }
+	  { $$= new Item_date_add_interval($4,$1,$2,0); }
+	| interval_expr
+	  {
+            if ($1->type() != Item::ROW_ITEM)
+            {
+              send_error(Lex->thd, ER_SYNTAX_ERROR);
+              YYABORT;
+            }
+            $$= new Item_func_interval((Item_row *)$1);
+          }
 	| LAST_INSERT_ID '(' ')'
 	  {
 	    $$= get_system_var(OPT_SESSION, "last_insert_id", 14,