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Viewing changes to drizzled/item/subselect.h

  • Committer: Padraig O'Sullivan
  • Date: 2009-09-13 01:03:01 UTC
  • mto: (1126.9.2 captain-20090915-01)
  • mto: This revision was merged to the branch mainline in revision 1133.
  • Revision ID: osullivan.padraig@gmail.com-20090913010301-tcvvezipx1124acy
Added calls to the dtrace delete begin/end probes.

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drizzled/item/subselect.h
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/* subselect Item */
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#include "drizzled/comp_creator.h"
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#include "drizzled/item/ref.h"
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#include "drizzled/item/field.h"
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#include "drizzled/item/bin_string.h"
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namespace drizzled
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{
 
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#include <drizzled/comp_creator.h>
 
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#include <drizzled/item/ref.h>
 
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#include <drizzled/item/field.h>
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class Select_Lex;
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class Select_Lex_Unit;
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  /* substitution instead of subselect in case of optimization */
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  Item *substitution;
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  /* unit of subquery */
 
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public:
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  Select_Lex_Unit *unit;
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protected:
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  /* engine that perform execution of subselect (single select or union) */
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  Item_in_subselect(Item * left_expr, Select_Lex *select_lex);
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  Item_in_subselect()
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    :
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      Item_exists_subselect(),
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      left_expr(NULL),
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      left_expr_cache(NULL),
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      first_execution(true),
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      optimizer(NULL),
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      abort_on_null(false),
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      pushed_cond_guards(NULL),
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      sj_convert_priority(0),
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      expr_join_nest(NULL),
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      exec_method(NOT_TRANSFORMED),
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      upper_item(NULL)
 
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    :Item_exists_subselect(), left_expr_cache(0), first_execution(true),
 
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    optimizer(0), abort_on_null(0), pushed_cond_guards(NULL),
 
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    exec_method(NOT_TRANSFORMED), upper_item(0)
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  {}
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  void cleanup();
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  subs_type substype() { return IN_SUBS; }
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};
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class subselect_engine: public memory::SqlAlloc
 
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class subselect_engine: public Sql_alloc
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{
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protected:
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  select_result_interceptor *result; /* results storage class */
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                         INDEXSUBQUERY_ENGINE, HASH_SJ_ENGINE};
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  subselect_engine(Item_subselect *si, select_result_interceptor *res)
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    :session(NULL)
 
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    :session(0)
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  {
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    result= res;
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    item= si;
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  virtual enum_engine_type engine_type() { return HASH_SJ_ENGINE; }
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};
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} /* namespace drizzled */
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#endif /* DRIZZLED_ITEM_SUBSELECT_H */