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plugin/info_schema/character_set.cc
 
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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) 2009 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; either version 2 of the License, or
 
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 *  (at your option) any later version.
 
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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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/**
 
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 * @file 
 
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 *   Character Set I_S table methods.
 
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 */
 
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#include "drizzled/server_includes.h"
 
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#include "drizzled/session.h"
 
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#include "drizzled/show.h"
 
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#include "helper_methods.h"
 
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#include "character_set.h"
 
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#include <vector>
 
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using namespace drizzled;
 
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using namespace std;
 
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/*
 
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 * Vectors of columns for the character set I_S table.
 
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 */
 
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static vector<const plugin::ColumnInfo *> *columns= NULL;
 
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/*
 
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 * Methods for the character set I_S table.
 
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 */
 
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static plugin::InfoSchemaMethods *methods= NULL;
 
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/*
 
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 * character set I_S table.
 
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 */
 
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static plugin::InfoSchemaTable *char_set_table= NULL;
 
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/**
 
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 * Populate the vectors of columns for the I_S table.
 
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 *
 
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 * @return false on success; true on failure.
 
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 */
 
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vector<const plugin::ColumnInfo *> *CharacterSetIS::createColumns()
 
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{
 
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  if (columns == NULL)
 
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  {
 
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    columns= new vector<const plugin::ColumnInfo *>;
 
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  }
 
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  else
 
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  {
 
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    clearColumns(*columns);
 
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  }
 
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  /*
 
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   * Create each column for the CHARACTER_SET table.
 
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   */
 
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  columns->push_back(new plugin::ColumnInfo("CHARACTER_SET_NAME",
 
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                                            64,
 
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                                            DRIZZLE_TYPE_VARCHAR,
 
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                                            0,
 
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                                            0,
 
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                                            "Charset",
 
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                                            SKIP_OPEN_TABLE));
 
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  columns->push_back(new plugin::ColumnInfo("DEFAULT_COLLATE_NAME",
 
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                                            64,
 
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                                            DRIZZLE_TYPE_VARCHAR,
 
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                                            0,
 
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                                            0,
 
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                                            "Default collation",
 
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                                            SKIP_OPEN_TABLE));
 
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  columns->push_back(new plugin::ColumnInfo("DESCRIPTION",
 
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                                            60,
 
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                                            DRIZZLE_TYPE_VARCHAR,
 
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                                            0,
 
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                                            0,
 
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                                            "Description",
 
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                                            SKIP_OPEN_TABLE));
 
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  columns->push_back(new plugin::ColumnInfo("MAXLEN",
 
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                                            3,
 
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                                            DRIZZLE_TYPE_LONGLONG,
 
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                                            0,
 
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                                            0,
 
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                                            "Maxlen",
 
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                                            SKIP_OPEN_TABLE));
 
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  return columns;
 
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}
 
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/**
 
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 * Initialize the I_S table.
 
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 *
 
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 * @return a pointer to an I_S table
 
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 */
 
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plugin::InfoSchemaTable *CharacterSetIS::getTable()
 
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{
 
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  columns= createColumns();
 
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  if (methods == NULL)
 
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  {
 
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    methods= new CharSetISMethods();
 
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  }
 
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  if (char_set_table == NULL)
 
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  {
 
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    char_set_table= new plugin::InfoSchemaTable("CHARACTER_SETS",
 
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                                                *columns,
 
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                                                -1, -1, false, false, 0,
 
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                                                methods);
 
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  }
 
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  return char_set_table;
 
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}
 
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/**
 
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 * Delete memory allocated for the table, columns and methods.
 
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 */
 
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void CharacterSetIS::cleanup()
 
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{
 
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  clearColumns(*columns);
 
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  delete char_set_table;
 
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  delete methods;
 
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  delete columns;
 
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}
 
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int CharSetISMethods::fillTable(Session *session, TableList *tables)
 
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{
 
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  CHARSET_INFO **cs;
 
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  const char *wild= session->lex->wild ? session->lex->wild->ptr() : NULL;
 
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  Table *table= tables->table;
 
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  const CHARSET_INFO * const scs= system_charset_info;
 
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  for (cs= all_charsets ; cs < all_charsets+255 ; cs++)
 
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  {
 
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    const CHARSET_INFO * const tmp_cs= cs[0];
 
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    if (tmp_cs && (tmp_cs->state & MY_CS_PRIMARY) &&
 
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        (tmp_cs->state & MY_CS_AVAILABLE) &&
 
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        !(tmp_cs->state & MY_CS_HIDDEN) &&
 
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        !(wild && wild[0] &&
 
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          wild_case_compare(scs, tmp_cs->csname,wild)))
 
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    {
 
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      const char *comment;
 
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      table->restoreRecordAsDefault();
 
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      table->field[0]->store(tmp_cs->csname, strlen(tmp_cs->csname), scs);
 
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      table->field[1]->store(tmp_cs->name, strlen(tmp_cs->name), scs);
 
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      comment= tmp_cs->comment ? tmp_cs->comment : "";
 
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      table->field[2]->store(comment, strlen(comment), scs);
 
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      table->field[3]->store((int64_t) tmp_cs->mbmaxlen, true);
 
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      if (schema_table_store_record(session, table))
 
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        return 1;
 
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    }
 
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  }
 
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  return 0;
 
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}
 
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int CharSetISMethods::oldFormat(Session *session, drizzled::plugin::InfoSchemaTable *schema_table)
 
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  const
 
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{
 
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  int fields_arr[]= {0, 2, 1, 3, -1};
 
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  int *field_num= fields_arr;
 
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  const drizzled::plugin::InfoSchemaTable::Columns tab_columns= schema_table->getColumns();
 
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  const drizzled::plugin::ColumnInfo *column= NULL;
 
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  Name_resolution_context *context= &session->lex->select_lex.context;
 
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  for (; *field_num >= 0; field_num++)
 
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  {
 
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    column= tab_columns[*field_num];
 
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    Item_field *field= new Item_field(context,
 
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                                      NULL, NULL, column->getName().c_str());
 
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    if (field)
 
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    {
 
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      field->set_name(column->getOldName().c_str(),
 
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                      column->getOldName().length(),
 
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                      system_charset_info);
 
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      if (session->add_item_to_list(field))
 
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        return 1;
 
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    }
 
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  }
 
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  return 0;
 
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}