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  • Committer: Monty Taylor
  • Date: 2008-10-10 23:04:21 UTC
  • mto: (509.1.1 codestyle)
  • mto: This revision was merged to the branch mainline in revision 511.
  • Revision ID: monty@inaugust.com-20081010230421-zohe1eppxievpw8d
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drizzled/plugin/table_function.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) 2010 Monty Taylor
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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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#include "config.h"
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22
 
#include <drizzled/plugin/table_function.h>
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#include <drizzled/table_function_container.h>
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#include <drizzled/gettext.h>
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#include "drizzled/global_charset_info.h"
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#include "drizzled/session.h"
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#include "drizzled/current_session.h"
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29
 
#include <vector>
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31
 
using namespace std;
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33
 
namespace drizzled
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{
35
 
 
36
 
static TableFunctionContainer table_functions;
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38
 
void plugin::TableFunction::init()
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{
40
 
  drizzled::message::Engine *engine;
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  drizzled::message::Table::TableOptions *table_options;
42
 
 
43
 
  proto.set_name(getTableLabel());
44
 
  proto.set_schema(identifier.getSchemaName());
45
 
  proto.set_type(drizzled::message::Table::FUNCTION);
46
 
  proto.set_creation_timestamp(0);
47
 
  proto.set_update_timestamp(0);
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49
 
  table_options= proto.mutable_options();
50
 
  table_options->set_collation_id(default_charset_info->number);
51
 
  table_options->set_collation(default_charset_info->name);
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53
 
  engine= proto.mutable_engine();
54
 
  engine->set_name("FunctionEngine");
55
 
}
56
 
 
57
 
bool plugin::TableFunction::addPlugin(plugin::TableFunction *tool)
58
 
{
59
 
  assert(tool != NULL);
60
 
  table_functions.addFunction(tool); 
61
 
  return false;
62
 
}
63
 
 
64
 
plugin::TableFunction *plugin::TableFunction::getFunction(const string &arg)
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{
66
 
  return table_functions.getFunction(arg);
67
 
}
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69
 
void plugin::TableFunction::getNames(const string &arg,
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                                     set<std::string> &set_of_names)
71
 
{
72
 
  table_functions.getNames(arg, set_of_names);
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}
74
 
 
75
 
plugin::TableFunction::Generator *plugin::TableFunction::generator(Field **arg)
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{
77
 
  return new Generator(arg);
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}
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80
 
void plugin::TableFunction::add_field(const char *label,
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                                      uint32_t field_length)
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{
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  add_field(label, TableFunction::STRING, field_length);
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}
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86
 
void plugin::TableFunction::add_field(const char *label,
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                              TableFunction::ColumnType type,
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                              bool is_default_null)
89
 
{
90
 
  add_field(label, type, 5, is_default_null);
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}
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93
 
void plugin::TableFunction::add_field(const char *label,
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                                      TableFunction::ColumnType type,
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                                      uint32_t field_length,
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                                      bool is_default_null)
97
 
{
98
 
  drizzled::message::Table::Field *field;
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  drizzled::message::Table::Field::FieldOptions *field_options;
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  drizzled::message::Table::Field::FieldConstraints *field_constraints;
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  field= proto.add_field();
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  field->set_name(label);
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  field_options= field->mutable_options();
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  field_constraints= field->mutable_constraints();
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  field_options->set_default_null(is_default_null);
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  field_constraints->set_is_nullable(is_default_null);
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  switch (type) 
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  {
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  default:
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  case TableFunction::BOOLEAN: // Currently BOOLEAN always has a value
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    field_length= 5;
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    field_options->set_default_null(false);
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    field_constraints->set_is_nullable(false);
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  case TableFunction::STRING:
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  {
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    drizzled::message::Table::Field::StringFieldOptions *string_field_options;
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    field->set_type(drizzled::message::Table::Field::VARCHAR);
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    string_field_options= field->mutable_string_options();
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    string_field_options->set_length(field_length);
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  }
125
 
    break;
126
 
  case TableFunction::VARBINARY:
127
 
  {
128
 
    drizzled::message::Table::Field::StringFieldOptions *string_field_options;
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    field->set_type(drizzled::message::Table::Field::VARCHAR);
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131
 
    string_field_options= field->mutable_string_options();
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    string_field_options->set_length(field_length);
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    string_field_options->set_collation(my_charset_bin.csname);
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    string_field_options->set_collation_id(my_charset_bin.number);
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  }
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    break;
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  case TableFunction::NUMBER: // Currently NUMBER always has a value
138
 
    field->set_type(drizzled::message::Table::Field::BIGINT);
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    break;
140
 
  }
141
 
}
142
 
 
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plugin::TableFunction::Generator::Generator(Field **arg) :
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  columns(arg),
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  session(current_session)
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{
147
 
  scs= system_charset_info;
148
 
}
149
 
 
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bool plugin::TableFunction::Generator::sub_populate(uint32_t field_size)
151
 
{
152
 
  bool ret;
153
 
  uint64_t difference;
154
 
 
155
 
  columns_iterator= columns;
156
 
  ret= populate();
157
 
  difference= columns_iterator - columns;
158
 
 
159
 
  if (ret == true)
160
 
  {
161
 
    assert(difference == field_size);
162
 
  }
163
 
 
164
 
  return ret;
165
 
}
166
 
 
167
 
void plugin::TableFunction::Generator::push(uint64_t arg)
168
 
{
169
 
  (*columns_iterator)->store(static_cast<int64_t>(arg), true);
170
 
  (*columns_iterator)->set_notnull();
171
 
  columns_iterator++;
172
 
}
173
 
 
174
 
void plugin::TableFunction::Generator::push(int64_t arg)
175
 
{
176
 
  (*columns_iterator)->store(arg, false);
177
 
  (*columns_iterator)->set_notnull();
178
 
  columns_iterator++;
179
 
}
180
 
 
181
 
void plugin::TableFunction::Generator::push(const char *arg, uint32_t length)
182
 
{
183
 
  assert(columns_iterator);
184
 
  assert(*columns_iterator);
185
 
  assert(arg);
186
 
  length= length ? length : strlen(arg);
187
 
 
188
 
  (*columns_iterator)->store(arg, length, scs);
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  (*columns_iterator)->set_notnull();
190
 
  columns_iterator++;
191
 
}
192
 
 
193
 
void plugin::TableFunction::Generator::push()
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{
195
 
#if 0 // @note this needs to be rewritten such that a drizzled::Field object can determine if it should ever be null
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  assert((*columns_iterator)->getTable()->getShare()->getTableProto()->field((*columns_iterator)->getTable()->getFields() - columns_iterator).constraints().is_nullable());
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#endif
198
 
  (*columns_iterator)->set_null();
199
 
  columns_iterator++;
200
 
}
201
 
 
202
 
void plugin::TableFunction::Generator::push(const std::string& arg)
203
 
{
204
 
  push(arg.c_str(), arg.length());
205
 
}
206
 
 
207
 
void plugin::TableFunction::Generator::push(bool arg)
208
 
{
209
 
  if (arg)
210
 
  {
211
 
    (*columns_iterator)->store("YES", 3, scs);
212
 
  }
213
 
  else
214
 
  {
215
 
    (*columns_iterator)->store("NO", 2, scs);
216
 
  }
217
 
 
218
 
  columns_iterator++;
219
 
}
220
 
 
221
 
bool plugin::TableFunction::Generator::isWild(const std::string &predicate)
222
 
{
223
 
  if (not getSession().lex->wild)
224
 
    return false;
225
 
 
226
 
  bool match= wild_case_compare(system_charset_info,
227
 
                                predicate.c_str(),
228
 
                                getSession().lex->wild->ptr());
229
 
 
230
 
  return match;
231
 
}
232
 
 
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} /* namespace drizzled */