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Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY


innobase/dict/dict0dict.c:
  Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY
innobase/include/dict0dict.h:
  Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY
innobase/include/row0mysql.h:
  Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY
sql/ha_innodb.cc:
  Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY
sql/sql_select.cc:
  Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY
include/my_base.h:
  Fix Bug #1942: do not retrieve all columns in a table if we only need the 'ref' of the row (usually, the PRIMARY KEY) to calculate an ORDER BY
This commit is contained in:
unknown
2004-03-17 19:37:48 +02:00
parent 8bdbfee96b
commit 68273f0f84
6 changed files with 98 additions and 26 deletions
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21
innobase/include/row0mysql.h
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@ -510,13 +510,15 @@ struct row_prebuilt_struct {
byte* ins_upd_rec_buff;/* buffer for storing data converted
to the Innobase format from the MySQL
format */
ibool hint_no_need_to_fetch_extra_cols;
/* normally this is TRUE, but
MySQL will set this to FALSE
if we might be required to fetch also
other columns than mentioned in the
query: the clustered index column(s),
or an auto-increment column*/
ulint hint_need_to_fetch_extra_cols;
/* normally this is set to 0; if this
is set to ROW_RETRIEVE_PRIMARY_KEY,
then we should at least retrieve all
columns in the primary key; if this
is set to ROW_RETRIEVE_ALL_COLS, then
we must retrieve all columns in the
key (if read_just_key == 1), or all
columns in the table */
upd_node_t* upd_node; /* Innobase SQL update node used
to perform updates and deletes */
que_fork_t* ins_graph; /* Innobase SQL query graph used
@ -572,6 +574,11 @@ struct row_prebuilt_struct {
#define ROW_MYSQL_DUMMY_TEMPLATE 3 /* dummy template used in
row_scan_and_check_index */
/* Values for hint_need_to_fetch_extra_cols */
#define ROW_RETRIEVE_PRIMARY_KEY 1
#define ROW_RETRIEVE_ALL_COLS 2
#ifndef UNIV_NONINL
#include "row0mysql.ic"
#endif