Remove not used IPC_COND_USED_INDEX

sql/opt_index_cond_pushdown.cc

@@ -152,7 +152,6 @@ bool uses_index_fields_only(Item *item, TABLE *tbl, uint keyno,
   }
 }
 
-#define ICP_COND_USES_INDEX_ONLY 10
 
 /*
   Get a part of the condition that can be checked using only index fields
@@ -161,8 +160,8 @@ bool uses_index_fields_only(Item *item, TABLE *tbl, uint keyno,
     make_cond_for_index()
       cond           The source condition
       table          The table that is partially available
-      keyno          The index in the above table. Only fields covered by the index
-                     are available
+      keyno          The index in the above table. Only fields covered by the
+                     index are available
       other_tbls_ok  TRUE <=> Fields of other non-const tables are allowed
 
   DESCRIPTION
@@ -173,8 +172,8 @@ bool uses_index_fields_only(Item *item, TABLE *tbl, uint keyno,
 
     Example:
       make_cond_for_index(
-         "cond(t1.field) AND cond(t2.key1) AND cond(t2.non_key) AND cond(t2.key2)",
-          t2, keyno(t2.key1)) 
+       "cond(t1.field) AND cond(t2.key1) AND cond(t2.non_key) AND cond(t2.key2)",
+        t2, keyno(t2.key1))
       will return
         "cond(t1.field) AND cond(t2.key2)"
 
@@ -189,7 +188,6 @@ static Item *make_cond_for_index(THD *thd, Item *cond, TABLE *table, uint keyno,
     return cond;
   if (cond->type() == Item::COND_ITEM)
   {
-    uint n_marked= 0;
     if (((Item_cond*) cond)->functype() == Item_func::COND_AND_FUNC)
     {
       table_map used_tables= 0;
@@ -206,14 +204,7 @@ static Item *make_cond_for_index(THD *thd, Item *cond, TABLE *table, uint keyno,
 	  new_cond->argument_list()->push_back(fix, thd->mem_root);
           used_tables|= fix->used_tables();
         }
-        if (item->marker == ICP_COND_USES_INDEX_ONLY)
-        {
-          n_marked++;
-          item->marker= 0;
-        } 
       }
-      if (n_marked ==((Item_cond*)cond)->argument_list()->elements)
-        cond->marker= ICP_COND_USES_INDEX_ONLY;
       switch (new_cond->argument_list()->elements) {
       case 0:
 	return (COND*) 0;
@@ -239,14 +230,7 @@ static Item *make_cond_for_index(THD *thd, Item *cond, TABLE *table, uint keyno,
 	if (!fix)
 	  return (COND*) 0;
 	new_cond->argument_list()->push_back(fix, thd->mem_root);
-        if (item->marker == ICP_COND_USES_INDEX_ONLY)
-        {
-          n_marked++;
-          item->marker= 0;
-        } 
       }
-      if (n_marked ==((Item_cond*)cond)->argument_list()->elements)
-        cond->marker= ICP_COND_USES_INDEX_ONLY;
       new_cond->quick_fix_field();
       new_cond->used_tables_cache= ((Item_cond_or*) cond)->used_tables_cache;
       new_cond->top_level_item();
@@ -256,7 +240,6 @@ static Item *make_cond_for_index(THD *thd, Item *cond, TABLE *table, uint keyno,
 
   if (!uses_index_fields_only(cond, table, keyno, other_tbls_ok))
     return (COND*) 0;
-  cond->marker= ICP_COND_USES_INDEX_ONLY;
   return cond;
 }