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Made keyread (key scanning) a key specific attribute.

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This avoids using fulltext keys for table scanning.
This also reverts Sinisa's original fix for this problem.


Docs/manual.texi:
  Update of SQL_JOIN_MAX_SIZE information3602
client/mysqldump.c:
  comment cleanup
include/my_aes.h:
  General cleanup for new file
include/rijndael.h:
  General cleanup for new file
include/sha1.h:
  General cleanup for new file
mysys/my_aes.c:
  General cleanup for new file
mysys/rijndael.c:
  General cleanup for new file
mysys/sha1.c:
  General cleanup for new file
sql/ha_berkeley.h:
  Made keyread (key scanning) a key specific attribute.
sql/ha_innodb.cc:
  Merge with 3.23.x
sql/ha_innodb.h:
  Made keyread (key scanning) a key specific attribute.
sql/ha_isam.cc:
  Moved things to table_flags()
sql/ha_isam.h:
  Made keyread (key scanning) a key specific attribute.
sql/ha_myisam.cc:
  Made keyread (key scanning) a key specific attribute.
sql/ha_myisam.h:
  Made keyread (key scanning) a key specific attribute.
sql/ha_myisammrg.h:
  Made keyread (key scanning) a key specific attribute.
sql/handler.h:
  Made keyread (key scanning) a key specific attribute.
sql/item_strfunc.cc:
  Cleanup of AES_xxx code
sql/opt_range.cc:
  Made keyread (key scanning) a key specific attribute.
sql/sql_base.cc:
  Made keyread (key scanning) a key specific attribute.
sql/sql_cache.cc:
  Removed compiler warning
sql/sql_select.cc:
  Removed wrong patch to fulltext problem
sql/table.cc:
  Made keyread (key scanning) a key specific attribute.
sql/table.h:
  Made keyread (key scanning) a key specific attribute.
This commit is contained in:
unknown
2002-06-19 00:22:30 +03:00
parent 9424f80f19
commit 518787c299
24 changed files with 1007 additions and 1120 deletions
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24
sql/opt_range.cc
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@ -682,27 +682,27 @@ int SQL_SELECT::test_quick_select(key_map keys_to_use, table_map prev_tables,
{
ha_rows found_records;
double found_read_time;
if (*key)
{
uint keynr= param.real_keynr[idx];
if ((*key)->type == SEL_ARG::MAYBE_KEY ||
(*key)->maybe_flag)
needed_reg|= (key_map) 1 << param.real_keynr[idx];
needed_reg|= (key_map) 1 << keynr;
found_records=check_quick_select(&param,idx, *key);
found_records=check_quick_select(&param, idx, *key);
if (found_records != HA_POS_ERROR && found_records > 2 &&
head->used_keys & ((table_map) 1 << param.real_keynr[idx]) &&
(head->file->table_flags() & HA_HAVE_KEY_READ_ONLY))
head->used_keys & ((table_map) 1 << keynr) &&
(head->file->index_flags(keynr) & HA_KEY_READ_ONLY))
{
/*
** We can resolve this by only reading through this key
** Assume that we will read trough the whole key range
** and that all key blocks are half full (normally things are
** much better)
We can resolve this by only reading through this key.
Assume that we will read trough the whole key range
and that all key blocks are half full (normally things are
much better).
*/
uint keys_per_block= head->file->block_size/2/
(head->key_info[param.real_keynr[idx]].key_length+
head->file->ref_length) + 1;
uint keys_per_block= (head->file->block_size/2/
(head->key_info[keynr].key_length+
head->file->ref_length) + 1);
found_read_time=((double) (found_records+keys_per_block-1)/
(double) keys_per_block);
}