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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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* Copyright (C) 2008 Sun Microsystems
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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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* 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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* 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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/* Copyright (C) 2006 MySQL AB
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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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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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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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#ifndef RPL_UTILITY_H
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#define RPL_UTILITY_H
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#include <drizzled/server_includes.h>
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#include <drizzled/table_list.h>
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#error "Don't include this C++ header file from a non-C++ file!"
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#include "mysql_priv.h"
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class Relay_log_info;
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@param metadata_size Size of the field_metadata array
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@param null_bitmap The bitmap of fields that can be null
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table_def(field_type *types, uint32_t size, unsigned char *field_metadata,
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table_def(field_type *types, uint32_t size, unsigned char *field_metadata,
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int metadata_size, unsigned char *null_bitmap)
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: m_size(size), m_type(0), m_field_metadata_size(metadata_size),
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m_field_metadata(0), m_null_bits(0), m_memory(NULL)
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&m_null_bits, (size + 7) / 8,
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memset(m_field_metadata, 0, size * sizeof(uint16_t));
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bzero(m_field_metadata, size * sizeof(uint16_t));
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memcpy(m_type, types, size);
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Extract the data from the table map into the field metadata array
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iff there is field metadata. The variable metadata_size will be
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0 if we are replicating from an older version server since no field
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metadata was written to the table map. This can also happen if
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metadata was written to the table map. This can also happen if
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there were no fields in the master that needed extra metadata.
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if (m_size && metadata_size)
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for (unsigned int i= 0; i < m_size; i++)
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switch (m_type[i]) {
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case DRIZZLE_TYPE_BLOB:
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case DRIZZLE_TYPE_DOUBLE:
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case MYSQL_TYPE_DOUBLE:
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These types store a single byte.
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table map for a given field. If there is no metadata for that field
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or there is no extra metadata at all, the function returns 0.
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The function returns the value for the field metadata for column at
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position indicated by index. As mentioned, if the field was a type
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that stores field metadata, that value is returned else zero (0) is
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returned. This method is used in the unpack() methods of the
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corresponding fields to properly extract the data from the binary log
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The function returns the value for the field metadata for column at
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position indicated by index. As mentioned, if the field was a type
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that stores field metadata, that value is returned else zero (0) is
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returned. This method is used in the unpack() methods of the
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corresponding fields to properly extract the data from the binary log
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in the event that the master's field is smaller than the slave.
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uint16_t field_metadata(uint32_t index) const
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This function returns whether the field on the master can be null.
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This value is derived from field->maybe_null().
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bool maybe_null(uint32_t index) const
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my_bool maybe_null(uint32_t index) const
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assert(index < m_size);
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return ((m_null_bits[(index / 8)] &
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return ((m_null_bits[(index / 8)] &
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(1 << (index % 8))) == (1 << (index %8)));
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This function returns the field size in raw bytes based on the type
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and the encoded field data from the master's raw data. This method can
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be used for situations where the slave needs to skip a column (e.g.,
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WL#3915) or needs to advance the pointer for the fields in the raw
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and the encoded field data from the master's raw data. This method can
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be used for situations where the slave needs to skip a column (e.g.,
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WL#3915) or needs to advance the pointer for the fields in the raw
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data from the master to a specific column.
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uint32_t calc_field_size(uint32_t col, unsigned char *master_data) const;
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uint32 calc_field_size(uint32_t col, unsigned char *master_data) const;
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Decide if the table definition is compatible with a table.
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@retval 1 if the table definition is not compatible with @c table
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@retval 0 if the table definition is compatible with @c table
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int compatible_with(Relay_log_info const *rli, Table *table) const;
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int compatible_with(Relay_log_info const *rli, TABLE *table) const;
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uint32_t m_size; // Number of elements in the types array
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Extend the normal table list with a few new fields needed by the
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slave thread, but nowhere else.
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struct RPL_TABLE_LIST
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bool m_tabledef_valid;
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table_def m_tabledef;
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/* Anonymous namespace for template functions/classes */
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Smart pointer that will automatically call my_afree (a macro) when
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the pointer goes out of scope. This is used so that I do not have
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to remember to call my_afree() before each return. There is no
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overhead associated with this, since all functions are inline.
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I (Matz) would prefer to use the free function as a template
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parameter, but that is not possible when the "function" is a
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auto_afree_ptr(Obj* ptr) : m_ptr(ptr) { }
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~auto_afree_ptr() { if (m_ptr) my_afree(m_ptr); }
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void assign(Obj* ptr) {
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/* Only to be called if it hasn't been given a value before. */
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assert(m_ptr == NULL);
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Obj* get() { return m_ptr; }
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#endif /* RPL_UTILITY_H */