WL#2735: Refactor replication

Factoring out pack_row() and unpack_row() into new files
rpl_record.{cc,h}.


libmysqld/Makefile.am:
  Adding file rpl_record.cc
sql/CMakeLists.txt:
  Adding file rpl_record.cc
sql/Makefile.am:
  Adding file rpl_record.cc and rpl_record.h
sql/log_event.cc:
  Moving implementation of unpack_row() into "rpl_record.cc".
  Adding inclusion of header file "rpl_record.h".
sql/log_event_old.cc:
  Signature of do_prepare_row() changed.
sql/log_event_old.h:
  Adding copyright.
sql/rpl_record_old.cc:
  Signature of do_prepare_row() changed.
sql/rpl_record_old.h:
  Adding copyright.
  Signature of do_prepare_row() changed.
sql/sql_class.cc:
  Moving implementation THD::pack_row() into "rpl_record.cc" and rewriting
  it to be a global function.
  Adding inclusion of header file "rpl_record.h".
sql/sql_class.h:
  Removing pack_row() as THD member function.
sql/rpl_record.cc:
  New BitKeeper file ``sql/rpl_record.cc''
sql/rpl_record.h:
  New BitKeeper file ``sql/rpl_record.h''

11 files changed, 367 insertions, 281 deletions

diff --git a/sql/CMakeLists.txt b/sql/CMakeLists.txt
index f0e7bea74c6..6d0d0473151 100644
--- a/sql/CMakeLists.txt
+++ b/sql/CMakeLists.txt
@@ -47,7 +47,8 @@ ADD_EXECUTABLE(mysqld ../sql-common/client.c derror.cc des_key_file.cc
                hostname.cc init.cc item.cc item_buff.cc item_cmpfunc.cc 
                item_create.cc item_func.cc item_geofunc.cc item_row.cc 
                item_strfunc.cc item_subselect.cc item_sum.cc item_timefunc.cc 
-               key.cc log.cc lock.cc log_event.cc message.rc 
+               key.cc log.cc lock.cc message.rc 
+               log_event.cc rpl_record.cc
                log_event_old.cc rpl_record_old.cc
                message.h mf_iocache.cc my_decimal.cc ../sql-common/my_time.c
                mysqld.cc net_serv.cc 
diff --git a/sql/Makefile.am b/sql/Makefile.am
index 0656c1a8f9b..037986e3e45 100644
--- a/sql/Makefile.am
+++ b/sql/Makefile.am
@@ -57,8 +57,8 @@ noinst_HEADERS =	item.h item_func.h item_sum.h item_cmpfunc.h \
 			log.h sql_show.h rpl_rli.h rpl_mi.h \
 			sql_select.h structs.h table.h sql_udf.h hash_filo.h \
 			lex.h lex_symbol.h sql_acl.h sql_crypt.h  \
-			log_event.h sql_repl.h slave.h rpl_filter.h \
-			rpl_injector.h \
+			sql_repl.h slave.h rpl_filter.h rpl_injector.h \
+			log_event.h rpl_record.h \
 			log_event_old.h rpl_record_old.h \
 			stacktrace.h sql_sort.h sql_cache.h set_var.h \
 			spatial.h gstream.h client_settings.h tzfile.h \
@@ -87,8 +87,9 @@ mysqld_SOURCES =	sql_lex.cc sql_handler.cc sql_partition.cc \
 			sql_prepare.cc sql_error.cc sql_locale.cc \
 			sql_update.cc sql_delete.cc uniques.cc sql_do.cc \
 			procedure.cc sql_test.cc \
-			log.cc log_event.cc init.cc derror.cc sql_acl.cc \
+			log.cc init.cc derror.cc sql_acl.cc \
 			unireg.cc des_key_file.cc \
+			log_event.cc rpl_record.cc \
 			log_event_old.cc rpl_record_old.cc \
 			discover.cc time.cc opt_range.cc opt_sum.cc \
 		   	records.cc filesort.cc handler.cc \
diff --git a/sql/log_event.cc b/sql/log_event.cc
index d484ef55e5e..b67629a2c08 100644
--- a/sql/log_event.cc
+++ b/sql/log_event.cc
@@ -26,6 +26,7 @@
 #include "rpl_mi.h"
 #include "rpl_filter.h"
 #include "rpl_utility.h"
+#include "rpl_record.h"
 #include <my_dir.h>
 #endif /* MYSQL_CLIENT */
 #include <base64.h>
@@ -5811,163 +5812,6 @@ int Rows_log_event::do_add_row_data(byte *const row_data,
 #endif
 
 #if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
-/*
-  Unpack a row into table->record[0].
-  
-  SYNOPSIS
-    unpack_row()
-    rli     Relay log info
-    table   Table to unpack into
-    colcnt  Number of columns to read from record
-    row     Packed row data
-    cols    Pointer to columns data to fill in
-    row_end Pointer to variable that will hold the value of the
-            one-after-end position for the row
-    master_reclength
-             Pointer to variable that will be set to the length of the
-             record on the master side
-    rw_set   Pointer to bitmap that holds either the read_set or the
-             write_set of the table
-
-  DESCRIPTION
-
-      The function will always unpack into the table->record[0]
-      record.  This is because there are too many dependencies on
-      where the various member functions of Field and subclasses
-      expect to write.
-
-      The row is assumed to only consist of the fields for which the
-      bitset represented by 'arr' and 'bits'; the other parts of the
-      record are left alone.
-
-      At most 'colcnt' columns are read: if the table is larger than
-      that, the remaining fields are not filled in.
-
-  RETURN VALUE
-
-      Error code, or zero if no error. The following error codes can
-      be returned:
-
-      ER_NO_DEFAULT_FOR_FIELD
-        Returned if one of the fields existing on the slave but not on
-        the master does not have a default value (and isn't nullable)
- */
-static int
-unpack_row(RELAY_LOG_INFO const *rli,
-           TABLE *table, uint const colcnt,
-           char const *const row_data, MY_BITMAP const *cols,
-           char const **const row_end, ulong *const master_reclength,
-           MY_BITMAP* const rw_set, Log_event_type const event_type)
-{
-  DBUG_ENTER("unpack_row");
-  DBUG_ASSERT(row_data);
-  my_size_t const master_null_byte_count= (bitmap_bits_set(cols) + 7) / 8;
-  int error= 0;
-
-  char const *null_ptr= row_data;
-  char const *pack_ptr= row_data + master_null_byte_count;
-
-  bitmap_clear_all(rw_set);
-
-  empty_record(table);
-
-  Field **const begin_ptr = table->field;
-  Field **field_ptr;
-  Field **const end_ptr= begin_ptr + colcnt;
-
-  DBUG_ASSERT(null_ptr < row_data + master_null_byte_count);
-
-  // Mask to mask out the correct bit among the null bits
-  unsigned int null_mask= 1U;
-  // The "current" null bits
-  unsigned int null_bits= *null_ptr++;
-  for (field_ptr= begin_ptr ; field_ptr < end_ptr ; ++field_ptr)
-  {
-    Field *const f= *field_ptr;
-
-    /*
-      No need to bother about columns that does not exist: they have
-      gotten default values when being emptied above.
-     */
-    if (bitmap_is_set(cols, field_ptr -  begin_ptr))
-    {
-      if ((null_mask & 0xFF) == 0)
-      {
-        DBUG_ASSERT(null_ptr < row_data + master_null_byte_count);
-        null_mask= 1U;
-        null_bits= *null_ptr++;
-      }
-
-      DBUG_ASSERT(null_mask & 0xFF); // One of the 8 LSB should be set
-
-      /* Field...::unpack() cannot return 0 */
-      DBUG_ASSERT(pack_ptr != NULL);
-
-      if ((null_bits & null_mask) && f->maybe_null())
-        f->set_null();
-      else
-      {
-        f->set_notnull();
-
-        /*
-          We only unpack the field if it was non-null
-        */
-        pack_ptr= f->unpack(f->ptr, pack_ptr);
-      }
-
-      bitmap_set_bit(rw_set, f->field_index);
-      null_mask <<= 1;
-    }
-  }
-
-  /*
-    We should now have read all the null bytes, otherwise something is
-    really wrong.
-   */
-  DBUG_ASSERT(null_ptr == row_data + master_null_byte_count);
-
-  *row_end = pack_ptr;
-  if (master_reclength)
-  {
-    if (*field_ptr)
-      *master_reclength = (*field_ptr)->ptr - (char*) table->record[0];
-    else
-      *master_reclength = table->s->reclength;
-  }
-
-  /*
-    Set properties for remaining columns, if there are any. We let the
-    corresponding bit in the write_set be set, to write the value if
-    it was not there already. We iterate over all remaining columns,
-    even if there were an error, to get as many error messages as
-    possible.  We are still able to return a pointer to the next row,
-    so redo that.
-
-    This generation of error messages is only relevant when inserting
-    new rows.
-   */
-  for ( ; *field_ptr ; ++field_ptr)
-  {
-    uint32 const mask= NOT_NULL_FLAG | NO_DEFAULT_VALUE_FLAG;
-    Field *const f= *field_ptr;
-
-    if (event_type == WRITE_ROWS_EVENT &&
-        ((*field_ptr)->flags & mask) == mask)
-    {
-      slave_print_msg(ERROR_LEVEL, rli, ER_NO_DEFAULT_FOR_FIELD,
-                      "Field `%s` of table `%s`.`%s` "
-                      "has no default value and cannot be NULL",
-                      (*field_ptr)->field_name, table->s->db.str,
-                      table->s->table_name.str);
-      error = ER_NO_DEFAULT_FOR_FIELD;
-    }
-    else
-      f->set_default();
-  }
-
-  DBUG_RETURN(error);
-}
-
 int Rows_log_event::do_apply_event(RELAY_LOG_INFO const *rli)
 {
   DBUG_ENTER("Rows_log_event::do_apply_event(st_relay_log_info*)");
diff --git a/sql/log_event_old.cc b/sql/log_event_old.cc
index 1172a3e0ad4..500feab0542 100644
--- a/sql/log_event_old.cc
+++ b/sql/log_event_old.cc
@@ -5,7 +5,8 @@
 
 #if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
 int
-Write_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
+Write_rows_log_event_old::do_prepare_row(THD *thd,
+                                         RELAY_LOG_INFO const *rli,
                                          TABLE *table,
                                          char const *row_start,
                                          char const **row_end)
@@ -14,7 +15,8 @@ Write_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
   DBUG_ASSERT(row_start && row_end);
 
   int error;
-  error= unpack_row_old(rli, table, m_width, table->record[0],
+  error= unpack_row_old(const_cast<RELAY_LOG_INFO*>(rli),
+                        table, m_width, table->record[0],
                         row_start, &m_cols, row_end, &m_master_reclength,
                         table->write_set, PRE_GA_WRITE_ROWS_EVENT);
   bitmap_copy(table->read_set, table->write_set);
@@ -23,7 +25,8 @@ Write_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
 
 
 int
-Delete_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
+Delete_rows_log_event_old::do_prepare_row(THD *thd,
+                                          RELAY_LOG_INFO const *rli,
                                           TABLE *table,
                                           char const *row_start,
                                           char const **row_end)
@@ -36,7 +39,8 @@ Delete_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
   */
   DBUG_ASSERT(table->s->fields >= m_width);
 
-  error= unpack_row_old(rli, table, m_width, table->record[0],
+  error= unpack_row_old(const_cast<RELAY_LOG_INFO*>(rli),
+                        table, m_width, table->record[0],
                         row_start, &m_cols, row_end, &m_master_reclength,
                         table->read_set, PRE_GA_DELETE_ROWS_EVENT);
   /*
@@ -54,7 +58,8 @@ Delete_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
 }
 
 
-int Update_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
+int Update_rows_log_event_old::do_prepare_row(THD *thd,
+                                              RELAY_LOG_INFO const *rli,
                                               TABLE *table,
                                               char const *row_start,
                                               char const **row_end)
@@ -68,12 +73,14 @@ int Update_rows_log_event_old::do_prepare_row(THD *thd, RELAY_LOG_INFO *rli,
   DBUG_ASSERT(table->s->fields >= m_width);
 
   /* record[0] is the before image for the update */
-  error= unpack_row_old(rli, table, m_width, table->record[0],
+  error= unpack_row_old(const_cast<RELAY_LOG_INFO*>(rli),
+                        table, m_width, table->record[0],
                         row_start, &m_cols, row_end, &m_master_reclength,
                         table->read_set, PRE_GA_UPDATE_ROWS_EVENT);
   row_start = *row_end;
   /* m_after_image is the after image for the update */
-  error= unpack_row_old(rli, table, m_width, m_after_image,
+  error= unpack_row_old(const_cast<RELAY_LOG_INFO*>(rli),
+                        table, m_width, m_after_image,
                         row_start, &m_cols, row_end, &m_master_reclength,
                         table->write_set, PRE_GA_UPDATE_ROWS_EVENT);
 
diff --git a/sql/log_event_old.h b/sql/log_event_old.h
index 18d17719a5a..87b11aea3a3 100644
--- a/sql/log_event_old.h
+++ b/sql/log_event_old.h
@@ -1,3 +1,18 @@
+/* Copyright 2007 MySQL AB. All rights reserved.
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
 #ifndef LOG_EVENT_OLD_H
 #define LOG_EVENT_OLD_H
 
diff --git a/sql/rpl_record.cc b/sql/rpl_record.cc
new file mode 100644
index 00000000000..414572027b6
--- /dev/null
+++ b/sql/rpl_record.cc
@@ -0,0 +1,278 @@
+/* Copyright 2007 MySQL AB. All rights reserved.
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#include "mysql_priv.h"
+#include "rpl_record.h"
+#include "slave.h"                  // Need to pull in slave_print_msg
+
+/**
+   Pack a record of data for a table into a format suitable for
+   transfer via the binary log.
+
+   The format for a row in transfer with N fields is the following:
+
+   ceil(N/8) null bytes:
+       One null bit for every column *regardless of whether it can be
+       null or not*. This simplifies the decoding. Observe that the
+       number of null bits is equal to the number of set bits in the
+       @c cols bitmap. The number of null bytes is the smallest number
+       of bytes necessary to store the null bits.
+
+       Padding bits are 1.
+
+   N packets:
+       Each field is stored in packed format.
+
+
+   @param table    Table describing the format of the record
+
+   @param cols     Bitmap with a set bit for each column that should
+                   be stored in the row
+
+   @param row_data Pointer to memory where row will be written
+
+   @param record   Pointer to record that should be packed. It is
+                   assumed that the pointer refers to either @c
+                   record[0] or @c record[1], but no such check is
+                   made since the code does not rely on that.
+
+   @return The number of bytes written at @c row_data.
+ */
+my_size_t
+pack_row(TABLE *table, MY_BITMAP const* cols,
+         byte *const row_data, const byte *record)
+{
+  Field **p_field= table->field, *field;
+  int const null_byte_count= (bitmap_bits_set(cols) + 7) / 8;
+  byte *pack_ptr = row_data + null_byte_count;
+  byte *null_ptr = row_data;
+  my_ptrdiff_t const rec_offset= record - table->record[0];
+  my_ptrdiff_t const def_offset= table->s->default_values - table->record[0];
+
+  /*
+    We write the null bits and the packed records using one pass
+    through all the fields. The null bytes are written little-endian,
+    i.e., the first fields are in the first byte.
+   */
+  unsigned int null_bits= (1U << 8) - 1;
+  // Mask to mask out the correct but among the null bits
+  unsigned int null_mask= 1U;
+  for ( ; (field= *p_field) ; p_field++)
+  {
+    DBUG_PRINT("debug", ("null_mask=%d; null_ptr=%p; row_data=%p; null_byte_count=%d",
+                         null_mask, null_ptr, row_data, null_byte_count));
+    if (bitmap_is_set(cols, p_field - table->field))
+    {
+      my_ptrdiff_t offset;
+      if (field->is_null(rec_offset))
+      {
+        offset= def_offset;
+        null_bits |= null_mask;
+      }
+      else
+      {
+        offset= rec_offset;
+        null_bits &= ~null_mask;
+
+        /*
+          We only store the data of the field if it is non-null
+         */
+        pack_ptr= (byte*)field->pack((char *) pack_ptr, field->ptr + offset);
+      }
+
+      null_mask <<= 1;
+      if ((null_mask & 0xFF) == 0)
+      {
+        DBUG_ASSERT(null_ptr < row_data + null_byte_count);
+        null_mask = 1U;
+        *null_ptr++ = null_bits;
+        null_bits= (1U << 8) - 1;
+      }
+    }
+  }
+
+  /*
+    Write the last (partial) byte, if there is one
+  */
+  if ((null_mask & 0xFF) > 1)
+  {
+    DBUG_ASSERT(null_ptr < row_data + null_byte_count);
+    *null_ptr++ = null_bits;
+  }
+
+  /*
+    The null pointer should now point to the first byte of the
+    packed data. If it doesn't, something is very wrong.
+  */
+  DBUG_ASSERT(null_ptr == row_data + null_byte_count);
+
+  return static_cast<my_size_t>(pack_ptr - row_data);
+}
+
+
+/**
+   Unpack a row into @c table->record[0].
+
+   The function will always unpack into the @c table->record[0]
+   record.  This is because there are too many dependencies on where
+   the various member functions of Field and subclasses expect to
+   write.
+
+   The row is assumed to only consist of the fields for which the
+   bitset represented by @c arr and @c bits; the other parts of the
+   record are left alone.
+
+   At most @c colcnt columns are read: if the table is larger than
+   that, the remaining fields are not filled in.
+
+   @param rli     Relay log info
+   @param table   Table to unpack into
+   @param colcnt  Number of columns to read from record
+   @param row     Packed row data
+   @param cols    Pointer to columns data to fill in
+   @param row_end Pointer to variable that will hold the value of the
+                  one-after-end position for the row
+   @param master_reclength
+                  Pointer to variable that will be set to the length of the
+                  record on the master side
+   @param rw_set  Pointer to bitmap that holds either the read_set or the
+                  write_set of the table
+
+
+   @retval 0 No error
+
+   @retval ER_NO_DEFAULT_FOR_FIELD
+   Returned if one of the fields existing on the slave but not on the
+   master does not have a default value (and isn't nullable)
+
+ */
+#ifdef HAVE_REPLICATION
+int
+unpack_row(RELAY_LOG_INFO const *rli,
+           TABLE *table, uint const colcnt,
+           char const *const row_data, MY_BITMAP const *cols,
+           char const **const row_end, ulong *const master_reclength,
+           MY_BITMAP* const rw_set, Log_event_type const event_type)
+{
+  DBUG_ENTER("unpack_row");
+  DBUG_ASSERT(row_data);
+  my_size_t const master_null_byte_count= (bitmap_bits_set(cols) + 7) / 8;
+  int error= 0;
+
+  char const *null_ptr= row_data;
+  char const *pack_ptr= row_data + master_null_byte_count;
+
+  bitmap_clear_all(rw_set);
+
+  empty_record(table);
+
+  Field **const begin_ptr = table->field;
+  Field **field_ptr;
+  Field **const end_ptr= begin_ptr + colcnt;
+
+  DBUG_ASSERT(null_ptr < row_data + master_null_byte_count);
+
+  // Mask to mask out the correct bit among the null bits
+  unsigned int null_mask= 1U;
+  // The "current" null bits
+  unsigned int null_bits= *null_ptr++;
+  for (field_ptr= begin_ptr ; field_ptr < end_ptr ; ++field_ptr)
+  {
+    Field *const f= *field_ptr;
+
+    /*
+      No need to bother about columns that does not exist: they have
+      gotten default values when being emptied above.
+     */
+    if (bitmap_is_set(cols, field_ptr -  begin_ptr))
+    {
+      if ((null_mask & 0xFF) == 0)
+      {
+        DBUG_ASSERT(null_ptr < row_data + master_null_byte_count);
+        null_mask= 1U;
+        null_bits= *null_ptr++;
+      }
+
+      DBUG_ASSERT(null_mask & 0xFF); // One of the 8 LSB should be set
+
+      /* Field...::unpack() cannot return 0 */
+      DBUG_ASSERT(pack_ptr != NULL);
+
+      if ((null_bits & null_mask) && f->maybe_null())
+        f->set_null();
+      else
+      {
+        f->set_notnull();
+
+        /*
+          We only unpack the field if it was non-null
+        */
+        pack_ptr= f->unpack(f->ptr, pack_ptr);
+      }
+
+      bitmap_set_bit(rw_set, f->field_index);
+      null_mask <<= 1;
+    }
+  }
+
+  /*
+    We should now have read all the null bytes, otherwise something is
+    really wrong.
+   */
+  DBUG_ASSERT(null_ptr == row_data + master_null_byte_count);
+
+  *row_end = pack_ptr;
+  if (master_reclength)
+  {
+    if (*field_ptr)
+      *master_reclength = (*field_ptr)->ptr - (char*) table->record[0];
+    else
+      *master_reclength = table->s->reclength;
+  }
+
+  /*
+    Set properties for remaining columns, if there are any. We let the
+    corresponding bit in the write_set be set, to write the value if
+    it was not there already. We iterate over all remaining columns,
+    even if there were an error, to get as many error messages as
+    possible.  We are still able to return a pointer to the next row,
+    so redo that.
+
+    This generation of error messages is only relevant when inserting
+    new rows.
+   */
+  for ( ; *field_ptr ; ++field_ptr)
+  {
+    uint32 const mask= NOT_NULL_FLAG | NO_DEFAULT_VALUE_FLAG;
+    Field *const f= *field_ptr;
+
+    if (event_type == WRITE_ROWS_EVENT &&
+        ((*field_ptr)->flags & mask) == mask)
+    {
+      slave_print_msg(ERROR_LEVEL, rli, ER_NO_DEFAULT_FOR_FIELD,
+                      "Field `%s` of table `%s`.`%s` "
+                      "has no default value and cannot be NULL",
+                      (*field_ptr)->field_name, table->s->db.str,
+                      table->s->table_name.str);
+      error = ER_NO_DEFAULT_FOR_FIELD;
+    }
+    else
+      f->set_default();
+  }
+
+  DBUG_RETURN(error);
+}
+
+#endif // HAVE_REPLICATION
diff --git a/sql/rpl_record.h b/sql/rpl_record.h
new file mode 100644
index 00000000000..7ff1bbc7c8e
--- /dev/null
+++ b/sql/rpl_record.h
@@ -0,0 +1,33 @@
+/* Copyright 2007 MySQL AB. All rights reserved.
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+#ifndef RPL_RECORD_H
+#define RPL_RECORD_H
+
+#if !defined(MYSQL_CLIENT)
+my_size_t pack_row(TABLE* table, MY_BITMAP const* cols,
+                   byte *row_data, const byte *data);
+#endif
+
+#if !defined(MYSQL_CLIENT) && defined(HAVE_REPLICATION)
+int unpack_row(RELAY_LOG_INFO const *rli,
+               TABLE *table, uint const colcnt,
+               char const *const row_data, MY_BITMAP const *cols,
+               char const **const row_end, ulong *const master_reclength,
+               MY_BITMAP* const rw_set,
+               Log_event_type const event_type);
+#endif
+
+#endif
diff --git a/sql/rpl_record_old.cc b/sql/rpl_record_old.cc
index ccee1b2211b..73e2f4e7344 100644
--- a/sql/rpl_record_old.cc
+++ b/sql/rpl_record_old.cc
@@ -3,7 +3,7 @@
 #include "rpl_record_old.h"
 
 my_size_t
-pack_row_old(THD *thd, TABLE *table, MY_BITMAP const* cols,
+pack_row_old(TABLE *table, MY_BITMAP const* cols,
              byte *row_data, const byte *record)
 {
   Field **p_field= table->field, *field;
diff --git a/sql/rpl_record_old.h b/sql/rpl_record_old.h
index 7249d98c7b1..6ddb01de07c 100644
--- a/sql/rpl_record_old.h
+++ b/sql/rpl_record_old.h
@@ -1,8 +1,23 @@
+/* Copyright 2007 MySQL AB. All rights reserved.
+
+   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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
 #ifndef RPL_RECORD_OLD_H
 #define RPL_RECORD_OLD_H
 
 #ifndef MYSQL_CLIENT
-my_size_t pack_row_old(THD *thd, TABLE *table, MY_BITMAP const* cols,
+my_size_t pack_row_old(TABLE *table, MY_BITMAP const* cols,
                        byte *row_data, const byte *record);
 
 #ifdef HAVE_REPLICATION
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index 6ba9d0bc8f1..8ea6bb4de2a 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -27,6 +27,7 @@
 
 #include "mysql_priv.h"
 #include "rpl_rli.h"
+#include "rpl_record.h"
 #include <my_bitmap.h>
 #include "log_event.h"
 #include <m_ctype.h>
@@ -2554,112 +2555,6 @@ my_size_t THD::max_row_length_blob(TABLE *table, const byte *data) const
 }
 
 
-/*
-  Pack a record of data for a table into a format suitable for
-  transfer via the binary log.
-
-  SYNOPSIS
-    THD::pack_row()
-    table     Table describing the format of the record
-    cols      Bitmap with a set bit for each column that should be
-              stored in the row
-    row_data  Pointer to memory where row will be written
-    record    Pointer to record that should be packed. It is assumed
-              that the pointer refers to either record[0] or
-              record[1], but no such check is made since the code does
-              not rely on that.
-
-  DESCRIPTION
-
-    The format for a row in transfer with N fields is the following:
-
-    ceil(N/8) null bytes:
-        One null bit for every column *regardless of whether it can be
-        null or not*. This simplifies the decoding. Observe that the
-        number of null bits is equal to the number of set bits in the
-        'cols' bitmap. The number of null bytes is the smallest number
-        of bytes necessary to store the null bits.
-
-        Padding bits are 1.
-
-    N packets:
-        Each field is stored in packed format.
-
-
-  RETURN VALUE
-
-    The number of bytes written at 'row_data'.
- */
-my_size_t
-THD::pack_row(TABLE *table, MY_BITMAP const* cols,
-              byte *const row_data, const byte *record) const
-{
-  Field **p_field= table->field, *field;
-  int const null_byte_count= (bitmap_bits_set(cols) + 7) / 8;
-  byte *pack_ptr = row_data + null_byte_count;
-  byte *null_ptr = row_data;
-  my_ptrdiff_t const rec_offset= record - table->record[0];
-  my_ptrdiff_t const def_offset= table->s->default_values - table->record[0];
-
-  /*
-    We write the null bits and the packed records using one pass
-    through all the fields. The null bytes are written little-endian,
-    i.e., the first fields are in the first byte.
-   */
-  unsigned int null_bits= (1U << 8) - 1;
-  // Mask to mask out the correct but among the null bits
-  unsigned int null_mask= 1U;
-  for ( ; (field= *p_field) ; p_field++)
-  {
-    DBUG_PRINT("debug", ("null_mask=%d; null_ptr=%p; row_data=%p; null_byte_count=%d",
-                         null_mask, null_ptr, row_data, null_byte_count));
-    if (bitmap_is_set(cols, p_field - table->field))
-    {
-      my_ptrdiff_t offset;
-      if (field->is_null(rec_offset))
-      {
-        offset= def_offset;
-        null_bits |= null_mask;
-      }
-      else
-      {
-        offset= rec_offset;
-        null_bits &= ~null_mask;
-
-        /*
-          We only store the data of the field if it is non-null
-         */
-        pack_ptr= (byte*)field->pack((char *) pack_ptr, field->ptr + offset);
-      }
-
-      null_mask <<= 1;
-      if ((null_mask & 0xFF) == 0)
-      {
-        DBUG_ASSERT(null_ptr < row_data + null_byte_count);
-        null_mask = 1U;
-        *null_ptr++ = null_bits;
-        null_bits= (1U << 8) - 1;
-      }
-    }
-  }
-
-  /*
-    Write the last (partial) byte, if there is one
-  */
-  if ((null_mask & 0xFF) > 1)
-  {
-    DBUG_ASSERT(null_ptr < row_data + null_byte_count);
-    *null_ptr++ = null_bits;
-  }
-
-  /*
-    The null pointer should now point to the first byte of the
-    packed data. If it doesn't, something is very wrong.
-  */
-  DBUG_ASSERT(null_ptr == row_data + null_byte_count);
-
-  return static_cast<my_size_t>(pack_ptr - row_data);
-}
 
 
 namespace {
@@ -2830,9 +2725,9 @@ int THD::binlog_update_row(TABLE* table, bool is_trans,
   byte *before_row= row_data.slot(0);
   byte *after_row= row_data.slot(1);
 
-  my_size_t const before_size= pack_row(table, cols, before_row, 
+  my_size_t const before_size= pack_row(table, cols, before_row,
                                         before_record);
-  my_size_t const after_size= pack_row(table, cols, after_row, 
+  my_size_t const after_size= pack_row(table, cols, after_row,
                                        after_record);
 
   /*
diff --git a/sql/sql_class.h b/sql/sql_class.h
index dc420976572..ad08fc194c9 100644
--- a/sql/sql_class.h
+++ b/sql/sql_class.h
@@ -1043,9 +1043,6 @@ public:
     return (length+max_row_length_blob(table,data));
   }
 
-  my_size_t pack_row(TABLE* table, MY_BITMAP const* cols, byte *row_data,
-                     const byte *data) const;
-
   int binlog_flush_pending_rows_event(bool stmt_end);
   void binlog_delete_pending_rows_event();