First stage of table definition cache

Split TABLE to TABLE and TABLE_SHARE (TABLE_SHARE is still allocated as part of table, will be fixed soon)
Created Field::make_field() and made Field_num::make_field() to call this
Added 'TABLE_SHARE->db' that points to database name; Changed all usage of table_cache_key as database name to use this instead
Changed field->table_name to point to pointer to alias. This allows us to change alias for a table by just updating one pointer.
Renamed TABLE_SHARE->real_name to table_name
Renamed TABLE->table_name to alias
Renamed TABLE_LIST->real_name to table_name


include/myisam.h:
  Added const before names
mysql-test/r/group_min_max.result:
  Make results repeatable
mysql-test/t/group_min_max.test:
  Make results repeatable
sql/field.cc:
  Created Field::make_field() and made Field_num::make_field() to call this
  Use TABLE_SHARE
  Use sql_strmake() instead of sql_memdup() to simplify code
sql/field.h:
  Changed table_name to be pointer to table_name. This allows us to change alias for all fields by just changing one pointer.
  Use TABLE_SHARE
sql/field_conv.cc:
  Use TABLE_SHARE
sql/filesort.cc:
  Use TABLE_SHARE
sql/ha_berkeley.cc:
  Use TABLE_SHARE
sql/ha_heap.cc:
  Use TABLE_SHARE
sql/ha_innodb.cc:
  Use TABLE_SHARE
sql/ha_myisam.cc:
  Use TABLE_SHARE
sql/ha_myisammrg.cc:
  Use TABLE_SHARE
  Change some pointer handling to use const char*
sql/ha_ndbcluster.cc:
  Use TABLE_SHARE
sql/handler.cc:
  Use TABLE_SHARE
sql/item.cc:
  Use TABLE_SHARE
sql/item_func.cc:
  Use TABLE_SHARE
sql/item_subselect.cc:
  Use TABLE_SHARE
sql/item_sum.cc:
  Use TABLE_SHARE
sql/key.cc:
  Use TABLE_SHARE
sql/lock.cc:
  Use TABLE_SHARE
sql/log_event.cc:
  real_name -> table_name
sql/mysql_priv.h:
  Use TABLE_SHARE
sql/opt_range.cc:
  Use TABLE_SHARE
sql/opt_sum.cc:
  Use TABLE_SHARE
sql/records.cc:
  Use TABLE_SHARE
sql/repl_failsafe.cc:
  real_name -> table_name
sql/slave.cc:
  Use TABLE_SHARE
sql/sp.cc:
  Use TABLE_SHARE
sql/sp_head.cc:
  real_name -> table_name
sql/sql_acl.cc:
  Use TABLE_SHARE
  removed unnecessary assert
  fixed indentation
  changed some char * -> const char*
sql/sql_acl.h:
  changed some char* -> const char*
sql/sql_base.cc:
  Use TABLE_SHARE
sql/sql_cache.cc:
  Use TABLE_SHARE
sql/sql_class.cc:
  Use TABLE_SHARE
sql/sql_db.cc:
  real_name -> table_name
sql/sql_delete.cc:
  Use TABLE_SHARE
sql/sql_derived.cc:
  Use TABLE_SHARE
sql/sql_handler.cc:
  Use TABLE_SHARE
sql/sql_help.cc:
  Use TABLE_SHARE
sql/sql_insert.cc:
  Use TABLE_SHARE
sql/sql_load.cc:
  Use TABLE_SHARE
sql/sql_parse.cc:
  Use TABLE_SHARE
sql/sql_rename.cc:
  real_name -> table_name
sql/sql_select.cc:
  Use TABLE_SHARE
  table->blob_fields now points to field offsets, not fields
  tmp_table->table_name now points to alias name
sql/sql_show.cc:
  Use TABLE_SHARE
sql/sql_table.cc:
  Use TABLE_SHARE
sql/sql_test.cc:
  Use TABLE_SHARE
sql/sql_trigger.cc:
  Use TABLE_SHARE
sql/sql_udf.cc:
  Use TABLE_SHARE
sql/sql_union.cc:
  real_name -> table_name
sql/sql_update.cc:
  Use TABLE_SHARE
sql/sql_view.cc:
  Use TABLE_SHARE
sql/table.cc:
  Split TABLE to TABLE and TABLE_SHARE
  Changed blob_field to be field offsets instead of pointer to fields
  Only initialize table->s->default_values with default record (not all table->record[#])
  Some indentation changes
sql/table.h:
  Split TABLE to TABLE and TABLE_SHARE
sql/tztime.cc:
  real_name -> table_name
sql/unireg.cc:
  Use TABLE_SHARE
sql/unireg.h:
  Use TABLE_SHARE

1 files changed, 3 insertions, 2 deletions

diff --git a/sql/unireg.cc b/sql/unireg.cc
index ee036ed113d..dd94098fbf3 100644
--- a/sql/unireg.cc
+++ b/sql/unireg.cc
@@ -656,6 +656,7 @@ static bool make_empty_rec(File file,enum db_type table_type,
 
   /* We need a table to generate columns for default values */
   bzero((char*) &table,sizeof(table));
+  table.s= &table.share_not_to_be_used;
   handler= get_new_handler((TABLE*) 0, table_type);
 
   if (!handler ||
@@ -666,8 +667,8 @@ static bool make_empty_rec(File file,enum db_type table_type,
   }
 
   table.in_use= current_thd;
-  table.db_low_byte_first= handler->low_byte_first();
-  table.blob_ptr_size=portable_sizeof_char_ptr;
+  table.s->db_low_byte_first= handler->low_byte_first();
+  table.s->blob_ptr_size= portable_sizeof_char_ptr;
 
   firstpos=reclength;
   null_count=0;