Making full-text queries working with UNION's

mysql-test/r/fulltext.result

@@ -16,6 +16,11 @@ select * from t1 where MATCH(a,b) AGAINST ("indexes collections");
 a	b
 Full-text indexes	are called collections
 Only MyISAM tables	support collections
+select * from t1 where MATCH(a,b) AGAINST ("collections") UNION ALL select * from t1 where MATCH(a,b) AGAINST ("indexes");
+a	b
+Only MyISAM tables	support collections
+Full-text indexes	are called collections
+Full-text indexes	are called collections
 select * from t1 where MATCH(a,b) AGAINST("support -collections" IN BOOLEAN MODE);
 a	b
 MySQL has now support	for full-text search

mysql-test/t/fulltext.test

@@ -17,6 +17,10 @@ select * from t1 where MATCH(a,b) AGAINST ("collections");
 select * from t1 where MATCH(a,b) AGAINST ("indexes");
 select * from t1 where MATCH(a,b) AGAINST ("indexes collections");
 
+# UNION of fulltext's
+select * from t1 where MATCH(a,b) AGAINST ("collections") UNION ALL select * from t1 where MATCH(a,b) AGAINST ("indexes");
+
+
 # boolean search
 
 select * from t1 where MATCH(a,b) AGAINST("support -collections" IN BOOLEAN MODE);

sql/sql_base.cc

@@ -2175,8 +2175,8 @@ bool remove_table_from_cache(THD *thd, const char *db, const char *table_name,
 
 int setup_ftfuncs(THD *thd)
 {
-  List_iterator<Item_func_match> li(thd->lex.select_lex.ftfunc_list),
-                                 lj(thd->lex.select_lex.ftfunc_list);
+  List_iterator<Item_func_match> li(thd->lex.select->ftfunc_list),
+                                 lj(thd->lex.select->ftfunc_list);
   Item_func_match *ftf, *ftf2;
 
   while ((ftf=li++))
@@ -2196,9 +2196,9 @@ int setup_ftfuncs(THD *thd)
 
 int init_ftfuncs(THD *thd, bool no_order)
 {
-  if (thd->lex.select_lex.ftfunc_list.elements)
+  if (thd->lex.select->ftfunc_list.elements)
   {
-    List_iterator<Item_func_match> li(thd->lex.select_lex.ftfunc_list);
+    List_iterator<Item_func_match> li(thd->lex.select->ftfunc_list);
     Item_func_match *ifm;
     DBUG_PRINT("info",("Performing FULLTEXT search"));
     thd->proc_info="FULLTEXT initialization";

sql/sql_select.cc

@@ -196,6 +196,7 @@ mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &fields,COND *conds,
   List<Item>	all_fields(fields);
   bool		select_distinct;
   SELECT_LEX *select_lex = &(thd->lex.select_lex);
+  SELECT_LEX *cur_sel = thd->lex.select;
   DBUG_ENTER("mysql_select");
 
   /* Check that all tables, fields, conds and order are ok */
@@ -553,7 +554,7 @@ mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &fields,COND *conds,
   make_join_readinfo(&join,
 		     (select_options & (SELECT_DESCRIBE |
 					SELECT_NO_JOIN_CACHE)) |
-     (select_lex->ftfunc_list.elements ? SELECT_NO_JOIN_CACHE : 0));
+     (cur_sel->ftfunc_list.elements ? SELECT_NO_JOIN_CACHE : 0));
 
   /* Need to tell Innobase that to play it safe, it should fetch all
      columns of the tables: this is because MySQL
@@ -1615,7 +1616,7 @@ update_ref_and_keys(THD *thd, DYNAMIC_ARRAY *keyuse,JOIN_TAB *join_tab,
       add_key_part(keyuse,field);
   }
 
-  if (thd->lex.select_lex.ftfunc_list.elements)
+  if (thd->lex.select->ftfunc_list.elements)
   {
     add_ft_keys(keyuse,join_tab,cond,normal_tables);
   }

sql/sql_union.cc

@@ -126,7 +126,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
   }
   union_result->save_time_stamp=!describe;
 
-  for (sl=&lex->select_lex;sl;sl=sl->next)
+  for (sl=lex->select=&lex->select_lex;sl;sl=lex->select=sl->next)
   {
     thd->offset_limit=sl->offset_limit;
     thd->select_limit=sl->select_limit+sl->offset_limit;
@@ -155,6 +155,7 @@ int mysql_union(THD *thd, LEX *lex,select_result *result)
   delete union_result;
 
   /* Send result to 'result' */
+  lex->select = &lex->select_lex;
   res =-1;
   {
     /* Create a list of fields in the temporary table */