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Viewing changes to drizzled/join_table.h

  • Committer: Padraig O'Sullivan
  • Date: 2009-09-13 00:53:34 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-20090913005334-6wio2sbjugskfbm3
Added calls to the connection start/end dtrace probes.

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drizzled/join_table.h
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 * used in the nested loops join implementation.
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 */
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#ifndef DRIZZLED_JOIN_TABLE_H
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#define DRIZZLED_JOIN_TABLE_H
 
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#ifndef DRIZZLED_JOINTABLE_H
 
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#define DRIZZLED_JOINTABLE_H
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#include "drizzled/enum_nested_loop_state.h"
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#include "drizzled/table_reference.h"
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#include "drizzled/optimizer/range.h"
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#include "drizzled/join_cache.h"
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#include "drizzled/optimizer/key_use.h"
 
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#include <drizzled/enum_nested_loop_state.h>
 
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#include <drizzled/table_reference.h>
 
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#include <drizzled/opt_range.h>
 
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#include <drizzled/join_cache.h>
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#include <bitset>
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namespace drizzled
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{
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/* Values for JoinTable::packed_info */
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#define TAB_INFO_HAVE_VALUE 1
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#define TAB_INFO_USING_INDEX 2
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#define TAB_INFO_USING_WHERE 4
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#define TAB_INFO_FULL_SCAN_ON_NULL 8
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class KeyUse;
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class Table;
 
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class SQL_SELECT;
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/** Description of an access method */
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class JoinTable 
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{
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public:
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  JoinTable() :
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    table(NULL),
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    keyuse(NULL),
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    select(NULL),
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    select_cond(NULL),
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    quick(NULL),
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    pre_idx_push_select_cond(NULL),
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    on_expr_ref(NULL),
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    cond_equal(NULL),
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    first_inner(NULL),
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    found(false),
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    not_null_compl(false),
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    last_inner(NULL),
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    first_upper(NULL),
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    first_unmatched(NULL),
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    packed_info(0),
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    read_first_record(NULL),
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    next_select(NULL),
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    worst_seeks(0.0),
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    const_keys(0),
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    checked_keys(0),
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    needed_reg(0),
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    keys(0),
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    records(0),
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    found_records(0),
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    read_time(0),
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    dependent(0),
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    key_dependent(0),
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    use_quick(0),
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    index(0),
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    status(0),
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    used_fields(0),
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    used_fieldlength(0),
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    used_blobs(0),
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    type(AM_UNKNOWN),
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    cached_eq_ref_table(0),
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    eq_ref_table(0),
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    not_used_in_distinct(0),
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    sorted(0),
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    limit(0),
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    join(NULL),
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    insideout_match_tab(NULL),
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    insideout_buf(NULL),
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    found_match(false),
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    rowid_keep_flags(0),
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    embedding_map(0)
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  {}
 
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  JoinTable() {} /* Remove gcc warning */
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  Table *table;
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  optimizer::KeyUse *keyuse; /**< pointer to first used key */
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  optimizer::SqlSelect *select;
 
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  KeyUse *keyuse; /**< pointer to first used key */
 
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  SQL_SELECT *select;
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  COND *select_cond;
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  optimizer::QuickSelectInterface *quick;
 
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  QUICK_SELECT_I *quick;
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  /**
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    The value of select_cond before we've attempted to do Index Condition
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    Pushdown. We may need to restore everything back if we first choose one
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  {
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    return (select && select->quick &&
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            (select->quick->get_type() ==
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             optimizer::QuickSelectInterface::QS_TYPE_GROUP_MIN_MAX));
 
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             QUICK_SELECT_I::QS_TYPE_GROUP_MIN_MAX));
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  }
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  void readCachedRecord();
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};
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} /* namespace drizzled */
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#endif /* DRIZZLED_JOIN_TABLE_H */
 
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#endif /* DRIZZLED_JOINTABLE_H */