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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
*
* Definitions required for TableFunction plugin
*
* Copyright (C) 2010 Sun Microsystems, Inc.
* Copyright (C) 2010 Monty Taylor
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#pragma once
#include <drizzled/definitions.h>
#include <drizzled/plugin.h>
#include <drizzled/plugin/plugin.h>
#include <drizzled/identifier.h>
#include <drizzled/message/table.pb.h>
#include <drizzled/charset.h>
#include <drizzled/field.h>
#include <string>
#include <set>
#include <algorithm>
#include <drizzled/visibility.h>
namespace drizzled {
namespace plugin {
#define TABLE_FUNCTION_BLOB_SIZE 2049
// Not thread safe, but plugins are just loaded in a single thread right
// now.
static const char *local_string_append(const char *arg1, const char *arg2)
{
static char buffer[1024];
char *buffer_ptr= buffer;
strcpy(buffer_ptr, arg1);
buffer_ptr+= strlen(arg1);
buffer_ptr[0]= '-';
buffer_ptr++;
strcpy(buffer_ptr, arg2);
return buffer;
}
class DRIZZLED_API TableFunction : public Plugin
{
message::Table proto;
identifier::Table identifier;
std::string local_path;
std::string original_table_label;
void setName(); // init name
void init();
public:
TableFunction(const char *schema_arg, const char *table_arg) :
Plugin(local_string_append(schema_arg, table_arg) , "TableFunction"),
identifier(schema_arg, table_arg),
original_table_label(table_arg)
{
init();
}
static bool addPlugin(TableFunction *function);
static void removePlugin(TableFunction *)
{ }
static TableFunction *getFunction(const std::string &arg);
static void getNames(const std::string &arg,
std::set<std::string> &set_of_names);
enum ColumnType {
BOOLEAN,
NUMBER,
STRING,
VARBINARY,
SIZE
};
class Generator
{
Field **columns;
Field **columns_iterator;
Session *session;
protected:
LEX& lex();
statement::Statement& statement();
drizzled::Session &getSession()
{
return *session;
}
public:
const charset_info_st *scs;
Generator(Field **arg);
virtual ~Generator()
{ }
/*
Return type is bool meaning "are there more rows".
*/
bool sub_populate(uint32_t field_size);
virtual bool populate()
{
return false;
}
void push(uint64_t arg);
void push(int64_t arg);
void push(const char *arg, uint32_t length= 0);
void push(str_ref);
void push(bool arg);
void push();
bool isWild(const std::string &predicate);
};
void define(message::Table &arg)
{
arg.CopyFrom(proto);
}
const std::string &getTableLabel()
{
return original_table_label;
}
const std::string &getIdentifierTableName()
{
return identifier.getTableName();
}
const std::string &getSchemaHome()
{
return identifier.getSchemaName();
}
const std::string &getPath()
{
return identifier.getPath();
}
virtual Generator *generator(Field **arg);
void add_field(const char *label,
message::Table::Field::FieldType type,
uint32_t length= 0);
void add_field(const char *label,
uint32_t field_length= MAXIMUM_IDENTIFIER_LENGTH);
void add_field(const char *label,
TableFunction::ColumnType type,
bool is_default_null= true);
void add_field(const char *label,
TableFunction::ColumnType type,
uint32_t field_length,
bool is_default_null= false);
virtual bool visible() const { return true; }
};
} /* namespace plugin */
} /* namespace drizzled */
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