~drizzle-trunk/drizzle/development

390.1.2 by Monty Taylor
Fixed copyright headers in drizzled/
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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 *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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 *
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 *  Copyright (C) 2008 Sun Microsystems
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 *
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 *  This program is free software; you can redistribute it and/or modify
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 *  it under the terms of the GNU General Public License as published by
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 *  the Free Software Foundation; version 2 of the License.
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 *
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 *  This program is distributed in the hope that it will be useful,
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 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
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 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 *  GNU General Public License for more details.
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 *
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 *  You should have received a copy of the GNU General Public License
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 *  along with this program; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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 */
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327.2.4 by Brian Aker
Refactoring table.h
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#ifndef DRIZZLED_NESTED_JOIN_H
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#define DRIZZLED_NESTED_JOIN_H
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553.1.2 by Monty Taylor
Moved some bitmap defines into bitmap.
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#include <drizzled/sql_list.h>
553.1.3 by Monty Taylor
Split out nested_join.h.
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#include <drizzled/item.h>
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#include <drizzled/table_list.h>
553.1.2 by Monty Taylor
Moved some bitmap defines into bitmap.
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1100.4.2 by Padraig O'Sullivan
Removed the typedef for nested_join_map and instead just declare these
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#include <bitset>
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1280.1.10 by Monty Taylor
Put everything in drizzled into drizzled namespace.
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namespace drizzled
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{
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327.2.4 by Brian Aker
Refactoring table.h
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struct nested_join_st
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{
553.1.3 by Monty Taylor
Split out nested_join.h.
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  /* list of elements in the nested join */
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  List<TableList> join_list;
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  /* bitmap of tables in the nested join */
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  table_map used_tables;
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  /* tables that rejects nulls           */
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  table_map not_null_tables;
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  /* the first nested table in the plan  */
1089.1.1 by Brian Aker
Remove of JOIN_TAB to JoinTable
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  JoinTable *first_nested;
553.1.3 by Monty Taylor
Split out nested_join.h.
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  /*
327.2.4 by Brian Aker
Refactoring table.h
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    Used to count tables in the nested join in 2 isolated places:
553.1.3 by Monty Taylor
Split out nested_join.h.
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    1. In make_outerjoin_info().
327.2.4 by Brian Aker
Refactoring table.h
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    2. check_interleaving_with_nj/restore_prev_nj_state (these are called
553.1.3 by Monty Taylor
Split out nested_join.h.
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    by the join optimizer.
327.2.4 by Brian Aker
Refactoring table.h
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    Before each use the counters are zeroed by reset_nj_counters.
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  */
553.1.3 by Monty Taylor
Split out nested_join.h.
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  uint32_t counter_;
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  /* Bit used to identify this nested join*/
1100.4.2 by Padraig O'Sullivan
Removed the typedef for nested_join_map and instead just declare these
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  std::bitset<64> nj_map;
553.1.3 by Monty Taylor
Split out nested_join.h.
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327.2.4 by Brian Aker
Refactoring table.h
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  /*
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    (Valid only for semi-join nests) Bitmap of tables outside the semi-join
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    that are used within the semi-join's ON condition.
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  */
553.1.3 by Monty Taylor
Split out nested_join.h.
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  table_map sj_depends_on;
327.2.4 by Brian Aker
Refactoring table.h
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  /* Outer non-trivially correlated tables */
553.1.3 by Monty Taylor
Split out nested_join.h.
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  table_map sj_corr_tables;
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  List<Item> sj_outer_expr_list;
1637.5.9 by Prafulla Tekawade
Fix for Bug 592444
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  /**
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     True if this join nest node is completely covered by the query execution
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     plan. This means two things.
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     1. All tables on its @c join_list are covered by the plan.
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     2. All child join nest nodes are fully covered.
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   */
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  bool is_fully_covered() const { return join_list.elements == counter_; }
327.2.4 by Brian Aker
Refactoring table.h
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};
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1280.1.10 by Monty Taylor
Put everything in drizzled into drizzled namespace.
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} /* namespace drizzled */
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327.2.4 by Brian Aker
Refactoring table.h
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#endif /* DRIZZLED_NESTED_JOIN_H */