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BUG#21477 "memory overruns for certain kinds of subqueries":

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make st_select_lex::setup_ref_array() take into account that 
Item_sum-descendant objects located within descendant SELECTs
may be added into ref_pointer_array.


sql/item_sum.cc:
  BUG#21477 "memory overruns for certain kinds of subqueries":
  Make SELECT_LEX::n_sum_items contain # of Item_sum-derived objects
  that exist within this SELECT.
sql/sql_lex.h:
  BUG#21477 "memory overruns for certain kinds of subqueries":
  Add SELECT_LEX::n_sum_items and SELECT_LEXT::n_child_sum_items.
sql/sql_yacc.yy:
  BUG#21477 "memory overruns for certain kinds of subqueries":
  Make SELECT_LEX::n_sum_items contain # of Item_sum-derived objects
  that exist within this SELECT.
This commit is contained in:
unknown
2006-09-01 13:23:43 +04:00
parent f40b6c273c
commit dd6dc7adea
4 changed files with 16 additions and 6 deletions
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8
sql/sql_lex.h
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@@ -548,6 +548,12 @@ public:
bool braces; /* SELECT ... UNION (SELECT ... ) <- this braces */
/* TRUE when having fix field called in processing of this SELECT */
bool having_fix_field;
/* Number of Item_sum-derived objects in this SELECT */
uint n_sum_items;
/* Number of Item_sum-derived objects in children and descendant SELECTs */
uint n_child_sum_items;
/* explicit LIMIT clause was used */
bool explicit_limit;
/*
@@ -640,7 +646,7 @@ public:
bool test_limit();
friend void lex_start(THD *thd, uchar *buf, uint length);
st_select_lex() {}
st_select_lex() : n_sum_items(0), n_child_sum_items(0) {}
void make_empty_select()
{
init_query();