Drizzled Public API Documentation

referential_constraints.cc
00001 /* - mode: c; c-basic-offset: 2; indent-tabs-mode: nil; -*-
00002  *  vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
00003  *
00004  *  Copyright (C) 2010 Brian Aker
00005  *
00006  *  This program is free software; you can redistribute it and/or modify
00007  *  it under the terms of the GNU General Public License as published by
00008  *  the Free Software Foundation; either version 2 of the License, or
00009  *  (at your option) any later version.
00010  *
00011  *  This program is distributed in the hope that it will be useful,
00012  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00013  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00014  *  GNU General Public License for more details.
00015  *
00016  *  You should have received a copy of the GNU General Public License
00017  *  along with this program; if not, write to the Free Software
00018  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
00019  */
00020 
00021 #include <config.h>
00022 #include <plugin/information_schema_dictionary/dictionary.h>
00023 
00024 using namespace std;
00025 using namespace drizzled;
00026 
00027 ReferentialConstraints::ReferentialConstraints() :
00028   InformationSchema("REFERENTIAL_CONSTRAINTS")
00029 {
00030   add_field("CONSTRAINT_CATALOG");
00031   add_field("CONSTRAINT_SCHEMA");
00032   add_field("CONSTRAINT_NAME");
00033   add_field("UNIQUE_CONSTRAINT_CATALOG");
00034   add_field("UNIQUE_CONSTRAINT_SCHEMA");
00035   add_field("UNIQUE_CONSTRAINT_NAME");
00036   add_field("MATCH_OPTION");
00037   add_field("UPDATE_RULE");
00038   add_field("DELETE_RULE");
00039 }
00040 
00041 ReferentialConstraints::Generator::Generator(drizzled::Field **arg) :
00042   InformationSchema::Generator(arg),
00043   foreign_key_generator(getSession())
00044 {
00045 }
00046 
00047 bool ReferentialConstraints::Generator::populate()
00048 {
00049   drizzled::generator::FieldPair field_pair;
00050   while (!!(field_pair= foreign_key_generator))
00051   {
00052     const drizzled::message::Table *table_message= field_pair.first;
00053     const message::Table::ForeignKeyConstraint &foreign_key(table_message->fk_constraint(field_pair.second));
00054 
00055     // CONSTRAINT_CATALOG
00056     push(table_message->catalog());
00057 
00058     // CONSTRAINT_SCHEMA
00059     push(table_message->schema());
00060 
00061     // CONSTRAINT_NAME
00062     push(foreign_key.name());
00063 
00064     // UNIQUE_CONSTRAINT_CATALOG
00065     push(table_message->catalog());
00066     
00067     // UNIQUE_CONSTRAINT_SCHEMA
00068     push(table_message->schema());
00069 
00070     // UNIQUE_CONSTRAINT_NAME
00071     push(" ");
00072     
00073     // MATCH_OPTION 
00074     push(drizzled::message::type(foreign_key.match()));
00075     
00076     //UPDATE_RULE
00077     push(drizzled::message::type(foreign_key.update_option()));
00078 
00079     //DELETE_RULE
00080     push(drizzled::message::type(foreign_key.delete_option()));
00081 
00082     return true;
00083   }
00084 
00085   return false;
00086 }