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Fix of problem with WHERE/HAVING consist of alone outer reference field by wrapping it.

Browse Source 
sql/item.cc:
  Wrapper added.
sql/item.h:
  Wrapper added.
sql/mysql_priv.h:
  Wrap function added.
sql/sql_base.cc:
  Wrap function added.
  Fix of problem with WHERE consist of alone outer reference field by wrapping it.
sql/sql_select.cc:
  Fix of problem with HAVING consist of alone outer reference field by wrapping it.
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unknown
2011-01-24 13:31:17 +02:00
parent 2038256bed
commit 481cd2dbf1
5 changed files with 110 additions and 2 deletions
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7
sql/sql_select.cc
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@@ -543,6 +543,13 @@ JOIN::prepare(Item ***rref_pointer_array,
thd->where="having clause";
thd->lex->allow_sum_func|= 1 << select_lex_arg->nest_level;
select_lex->having_fix_field= 1;
/*
Wrap alone field in HAVING clause in case it will be outer field of subquery
which need persistent pointer on it, but having could be changed by optimizer
*/
if (having->type() == Item::REF_ITEM &&
((Item_ref *)having)->ref_type() == Item_ref::REF)
wrap_ident(thd, &having);
bool having_fix_rc= (!having->fixed &&
(having->fix_fields(thd, &having) ||
having->check_cols(1)));