Implemented DEFAULT for DECLARE variables.

BitKeeper/etc/logging_ok

@@ -72,6 +72,7 @@ papa@gbichot.local
 paul@central.snake.net
 paul@teton.kitebird.com
 pem@mysql.com
+pem@per-erik-martins-dator.local
 peter@linux.local
 peter@mysql.com
 pgulutzan@linux.local

mysql-test/r/sp.result

@@ -117,8 +117,7 @@ drop procedure inc2;
 drop procedure inc;
 create procedure cbv1()
 begin
-declare y int;
-set y = 3;
+declare y int default 3;
 call cbv2(y+1, y);
 insert into test.t1 values ("cbv1", y);
 end;
@@ -354,8 +353,7 @@ append("foo", "bar")
 foobar
 create function fac(n int unsigned) returns bigint unsigned
 begin
-declare f bigint unsigned;
-set f = 1;
+declare f bigint unsigned default 1;
 while n > 1 do
 set f = f * n;
 set n = n - 1;
@@ -396,8 +394,7 @@ drop table if exists fac;
 create table fac (n int unsigned not null primary key, f bigint unsigned);
 create procedure ifac(n int unsigned)
 begin
-declare i int unsigned;
-set i = 1;
+declare i int unsigned default 1;
 if n > 20 then
 set n = 20;		# bigint overflow otherwise
 end if;
@@ -452,8 +449,7 @@ insert into primes values
 create procedure opp(n bigint unsigned, out pp bool)
 begin
 declare r double;
-declare b, s bigint unsigned;
-set b = 0, s = 0;
+declare b, s bigint unsigned default 0;
 set r = sqrt(n);
 again:
 loop
@@ -483,8 +479,7 @@ declare i int unsigned;
 set i=45, p=201;
 while i < m do
 begin
-declare pp bool;
-set pp = 0;
+declare pp bool default 0;
 call opp(p, pp);
 if pp then
 insert into test.primes values (i, p);

mysql-test/t/sp.test

@@ -153,9 +153,8 @@ drop procedure inc|
 #    ("cbv1", 4711)
 create procedure cbv1()
 begin
-  declare y int;
+  declare y int default 3;
 
-  set y = 3;
   call cbv2(y+1, y);
   insert into test.t1 values ("cbv1", y);
 end|
@@ -428,9 +427,8 @@ select append("foo", "bar")|
 # A function with flow control
 create function fac(n int unsigned) returns bigint unsigned
 begin
-  declare f bigint unsigned;
+  declare f bigint unsigned default 1;
 
-  set f = 1;
   while n > 1 do
     set f = f * n;
     set n = n - 1;
@@ -479,8 +477,8 @@ create table fac (n int unsigned not null primary key, f bigint unsigned)|
 
 create procedure ifac(n int unsigned)
 begin
-  declare i int unsigned;
-  set i = 1;
+  declare i int unsigned default 1;
+
   if n > 20 then
     set n = 20;		# bigint overflow otherwise
   end if;
@@ -524,9 +522,8 @@ insert into primes values
 create procedure opp(n bigint unsigned, out pp bool)
 begin
   declare r double;
-  declare b, s bigint unsigned;
+  declare b, s bigint unsigned default 0;
 
-  set b = 0, s = 0;
   set r = sqrt(n);
 
  again:
@@ -561,9 +558,8 @@ begin
 
   while i < m do
     begin
-      declare pp bool;
+      declare pp bool default 0;
 
-      set pp = 0;
       call opp(p, pp);
       if pp then
         insert into test.primes values (i, p);

sql/sql_yacc.yy

@@ -622,7 +622,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 	table_wild opt_pad no_in_expr expr_expr simple_expr no_and_expr
 	using_list expr_or_default set_expr_or_default interval_expr
 	param_marker singlerow_subselect singlerow_subselect_init
-	exists_subselect exists_subselect_init
+	exists_subselect exists_subselect_init sp_opt_default
 
 %type <item_list>
 	expr_list udf_expr_list when_list ident_list ident_list_arg
@@ -1082,15 +1082,26 @@ sp_decls:
 	;
 
 sp_decl:
-	  DECLARE_SYM sp_decl_idents type
+	  DECLARE_SYM sp_decl_idents type sp_opt_default
 	  {
 	    LEX *lex= Lex;
 	    uint max= lex->spcont->current_framesize();
+	    enum enum_field_types type= (enum enum_field_types)$3;
+	    Item *it= $4;
 
 	    for (uint i = max-$2 ; i < max ; i++)
 	    {
-	      lex->spcont->set_type(i, (enum enum_field_types)$3);
+	      lex->spcont->set_type(i, type);
+	      if (! it)
 	        lex->spcont->set_isset(i, FALSE);
+	      else
+	      {
+	        sp_instr_set *in= new sp_instr_set(lex->sphead->instructions(),
+	                                           i, it, type);
+
+	        lex->sphead->add_instr(in);
+	        lex->spcont->set_isset(i, TRUE);
+	      }
 	    }
 	    $$= $2;
 	  }
@@ -1109,6 +1120,11 @@ sp_decl_idents:
 	  }
 	;
 
+sp_opt_default:
+	  /* Empty */ { $$ = NULL; }
+        | DEFAULT expr { $$ = $2; }
+	;
+
 sp_proc_stmt:
 	  {
 	    Lex->sphead->reset_lex(YYTHD);