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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1999.6.1
by kalebral at gmail
update Copyright strings to a more common format to help with creating the master debian copyright file |
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* Copyright (C) 2008 Sun Microsystems, Inc.
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390.1.2
by Monty Taylor
Fixed copyright headers in drizzled/ |
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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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353
by Brian Aker
Moved Field iterator out to its own definition. |
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2234
by Brian Aker
Mass removal of ifdef/endif in favor of pragma once. |
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#pragma once
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353
by Brian Aker
Moved Field iterator out to its own definition. |
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2173.2.1
by Monty Taylor
Fixes incorrect usage of include |
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#include <drizzled/memory/sql_alloc.h> |
520.8.6
by Monty Taylor
Removed handler from common_includes. |
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#include <drizzled/sql_list.h> |
584.1.15
by Monty Taylor
The mega-patch from hell. Renamed sql_class to session (since that's what it is) and removed it and field and table from common_includes. |
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#include <drizzled/natural_join_column.h> |
2198.1.2
by Olaf van der Spek
Refactor includes |
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#include <drizzled/item/field.h> |
520.8.6
by Monty Taylor
Removed handler from common_includes. |
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2198.1.2
by Olaf van der Spek
Refactor includes |
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namespace drizzled { |
1280.1.10
by Monty Taylor
Put everything in drizzled into drizzled namespace. |
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353
by Brian Aker
Moved Field iterator out to its own definition. |
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/*
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Iterator over the fields of a generic table reference.
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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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class Field_iterator: public memory::SqlAlloc |
353
by Brian Aker
Moved Field iterator out to its own definition. |
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{
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public: |
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Field_iterator() {} /* Remove gcc warning */ |
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virtual ~Field_iterator() {} |
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virtual void set(TableList *)= 0; |
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virtual void next()= 0; |
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virtual bool end_of_fields()= 0; /* Return 1 at end of list */ |
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virtual const char *name()= 0; |
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520.1.21
by Brian Aker
THD -> Session rename |
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virtual Item *create_item(Session *)= 0; |
353
by Brian Aker
Moved Field iterator out to its own definition. |
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virtual Field *field()= 0; |
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};
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660.1.3
by Eric Herman
removed trailing whitespace with simple script: |
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/*
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353
by Brian Aker
Moved Field iterator out to its own definition. |
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Iterator over the fields of a base table, view with temporary
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table, or subquery.
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*/
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class Field_iterator_table: public Field_iterator |
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{
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Field **ptr; |
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public: |
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Field_iterator_table() :ptr(0) {} |
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void set(TableList *table); |
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void set_table(Table *table); |
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void next() { ptr++; } |
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bool end_of_fields() { return *ptr == 0; } |
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const char *name(); |
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520.1.22
by Brian Aker
Second pass of thd cleanup |
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Item *create_item(Session *session); |
353
by Brian Aker
Moved Field iterator out to its own definition. |
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Field *field() { return *ptr; } |
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};
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/* Iterator over the fields of a merge view. */
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/*
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Field_iterator interface to the list of materialized fields of a
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NATURAL/USING join.
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*/
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class Field_iterator_natural_join: public Field_iterator |
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{
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2183.2.2
by Olaf van der Spek
x |
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List<Natural_join_column>::iterator column_ref_it; |
353
by Brian Aker
Moved Field iterator out to its own definition. |
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Natural_join_column *cur_column_ref; |
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public: |
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Field_iterator_natural_join() :cur_column_ref(NULL) {} |
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~Field_iterator_natural_join() {} |
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void set(TableList *table); |
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void next(); |
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bool end_of_fields() { return !cur_column_ref; } |
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const char *name() { return cur_column_ref->name(); } |
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520.1.22
by Brian Aker
Second pass of thd cleanup |
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Item *create_item(Session *session) { return cur_column_ref->create_item(session); } |
353
by Brian Aker
Moved Field iterator out to its own definition. |
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Field *field() { return cur_column_ref->field(); } |
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Natural_join_column *column_ref() { return cur_column_ref; } |
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};
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/*
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Generic iterator over the fields of an arbitrary table reference.
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DESCRIPTION
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This class unifies the various ways of iterating over the columns
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of a table reference depending on the type of SQL entity it
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represents. If such an entity represents a nested table reference,
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this iterator encapsulates the iteration over the columns of the
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members of the table reference.
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IMPLEMENTATION
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The implementation assumes that all underlying NATURAL/USING table
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references already contain their result columns and are linked into
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the list TableList::next_name_resolution_table.
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*/
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class Field_iterator_table_ref: public Field_iterator |
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{
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TableList *table_ref, *first_leaf, *last_leaf; |
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Field_iterator_table table_field_it; |
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Field_iterator_natural_join natural_join_it; |
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Field_iterator *field_it; |
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void set_field_iterator(); |
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public: |
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Field_iterator_table_ref() :field_it(NULL) {} |
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void set(TableList *table); |
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void next(); |
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bool end_of_fields() |
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{ return (table_ref == last_leaf && field_it->end_of_fields()); } |
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const char *name() { return field_it->name(); } |
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const char *table_name(); |
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const char *db_name(); |
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520.1.22
by Brian Aker
Second pass of thd cleanup |
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Item *create_item(Session *session) { return field_it->create_item(session); } |
353
by Brian Aker
Moved Field iterator out to its own definition. |
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Field *field() { return field_it->field(); } |
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Natural_join_column *get_or_create_column_ref(TableList *parent_table_ref); |
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Natural_join_column *get_natural_column_ref(); |
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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 */ |
353
by Brian Aker
Moved Field iterator out to its own definition. |
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