Post merge fixes

mysql-test/r/func_gconcat.result

@@ -611,6 +611,16 @@ count(distinct (f1+1))
 1
 3
 drop table t1;
+create table t1 (f1 int unsigned, f2 varchar(255));
+insert into t1 values (1,repeat('a',255)),(2,repeat('b',255));
+select f2,group_concat(f1) from t1 group by f2;
+Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
+def	test	t1	t1	f2	f2	253	255	255	Y	0	0	8
+def					group_concat(f1)	253	400	1	Y	128	0	63
+f2	group_concat(f1)
+aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa	1
+bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb	2
+drop table t1;
 set names latin1;
 create table t1 (a char, b char);
 insert into t1 values ('a', 'a'), ('a', 'b'), ('b', 'a'), ('b', 'b');

sql/sql_parse.cc

@@ -6361,11 +6361,12 @@ bool st_select_lex_unit::add_fake_select_lex(THD *thd)
   fake_select_lex->include_standalone(this, 
                                       (SELECT_LEX_NODE**)&fake_select_lex);
   fake_select_lex->select_number= INT_MAX;
+  fake_select_lex->parent_lex= thd->lex; /* Used in init_query. */
   fake_select_lex->make_empty_select();
   fake_select_lex->linkage= GLOBAL_OPTIONS_TYPE;
   fake_select_lex->select_limit= 0;
 
-  fake_select_lex->context.outer_context= first_sl->context.outer_context;
+  fake_select_lex->context.outer_context=first_sl->context.outer_context;
   /* allow item list resolving in fake select for ORDER BY */
   fake_select_lex->context.resolve_in_select_list= TRUE;
   fake_select_lex->context.select_lex= fake_select_lex;

sql/sql_union.cc

@@ -202,7 +202,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
   
   thd_arg->lex->current_select= sl= first_sl;
   found_rows_for_union= first_sl->options & OPTION_FOUND_ROWS;
-  is_union= test(first_select->next_select() || fake_select_lex);
+  is_union= first_sl->next_select() || fake_select_lex;
 
   /* Global option */
 

sql/sql_yacc.yy

@@ -5719,7 +5719,7 @@ order_clause:
             SELECT_LEX *first_sl= unit->first_select();
             if (!first_sl->next_select() &&
                 (first_sl->order_list.elements || 
-                 first_sl->select_limit != HA_POS_ERROR) &&            
+                 first_sl->select_limit) &&            
                 unit->add_fake_select_lex(lex->thd))
               YYABORT;
           }