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Trying to merge....

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Docs/manual.texi:
  t
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unknown
2002-07-23 17:25:54 +04:00
parent 9fb55d2981 d190cae014
commit 5423bd71b3
12 changed files with 278 additions and 48 deletions
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6
Docs/Makefile.am
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@ -27,7 +27,7 @@ EXTRA_DIST = $(noinst_SCRIPTS) $(BUILT_SOURCES) mysqld_error.txt \
all: $(targets) txt_files
txt_files: ../INSTALL-SOURCE ../COPYING ../COPYING.LIB \
../MIRRORS INSTALL-BINARY
INSTALL-BINARY # ../MIRRORS
CLEAN_FILES: $(BUILD_SOURCES)
touch $(BUILD_SOURCES)
@ -254,8 +254,8 @@ INSTALL-BINARY: mysql.info $(GT)
../COPYING.LIB: mysql.info $(GT)
perl -w $(GT) mysql.info "LGPL license" "Function Index" > $@
../MIRRORS: manual.texi $(srcdir)/Support/generate-mirror-listing.pl
perl -w $(srcdir)/Support/generate-mirror-listing.pl manual.texi > $@
#../MIRRORS: manual.texi $(srcdir)/Support/generate-mirror-listing.pl
# perl -w $(srcdir)/Support/generate-mirror-listing.pl manual.texi > $@
# Don't update the files from bitkeeper
%::SCCS/s.%

177
Docs/manual.texi
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@ -33450,7 +33450,7 @@ mysql> SELECT COUNT(DISTINCT results) FROM student;
In MySQL you can get the number of distinct expression
combinations that don't contain NULL by giving a list of expressions.
In ANSI SQL you would have to do a concatenation of all expressions
inside @code{CODE(DISTINCT ...)}.
inside @code{COUNT(DISTINCT ...)}.
@findex AVG()
@item AVG(expr)
@ -33592,7 +33592,8 @@ SELECT [STRAIGHT_JOIN]
[INTO @{OUTFILE | DUMPFILE@} 'file_name' export_options]
[FROM table_references
[WHERE where_definition]
[GROUP BY @{unsigned_integer | col_name | formula@} [ASC | DESC], ...]
[GROUP BY @{unsigned_integer | col_name | formula@} [ASC | DESC], ...
[WITH @{CUBE | ROLLUP@}] ]
[HAVING where_definition]
[ORDER BY @{unsigned_integer | col_name | formula@} [ASC | DESC] ,...]
[LIMIT [offset,] rows]
@ -33801,6 +33802,10 @@ If you are not getting the results you expect from your query, please
read the @code{GROUP BY} description.
@xref{Group by functions}.
@item
Since Version 3.23.12 MySQL supports @code{CUBE} and @code{ROLLUP}
clauses. @xref{CUBE and ROLLUP}.
@item
@cindex hints
@code{STRAIGHT_JOIN} forces the optimiser to join the tables in the order in
@ -33910,6 +33915,7 @@ the examined rows will be write locked.
@menu
* JOIN:: @code{JOIN} Syntax
* UNION:: @code{UNION} Syntax
* CUBE and ROLLUP @code{CUBE} and @code{ROLLUP} Syntax
@end menu
@node JOIN, UNION, SELECT, SELECT
@ -34074,7 +34080,7 @@ mysql> SELECT * FROM table1 IGNORE INDEX (key3)
@xref{LEFT JOIN optimisation, , @code{LEFT JOIN} optimisation}.
@node UNION, , JOIN, SELECT
@node UNION, CUBE and ROLLUP, JOIN, SELECT
@subsubsection @code{UNION} Syntax
@findex UNION
@ -34119,6 +34125,141 @@ UNION
ORDER BY a;
@end example
@node CUBE and ROLLUP, , UNION, SELECT
@subsubsection @code{CUBE} and @code{ROLLUP} Syntax
Documentation for OLAP extension
Introduction
------------
MySQL will first support CUBE and ROLLUP operators from entire OLAP
functionality.
The CUBE and ROLLUP extensions to SQL make querying and reporting
easier in data warehousing environments. ROLLUP creates subtotals at
increasing levels of aggregation, from the most detailed up to a grand
total. CUBE is an extension similar to ROLLUP, enabling a single
statement to calculate all possible combinations of subtotals.
Syntax:
------
The syntax supported by the enhanced mysql for CUBE and ROLLUP
operators.
CUBE
----
SELECT field1, field2, ... AGGR(fieldn) FROM
table GROUP BY field1, field2 field(n-1) WITH CUBE
This would generate the aggregates with group bys of all the
combinations of dimensions.
ROLLUP:
-----
SELECT field1, field2, ... AGGR(fieldn) FROM table
GROUP BY field1, field2 field(n-1) WITH ROLLUP
Example:
-------
mysql> select * from sales;
+------------+---------------+------+--------+
| product | country | year | profit |
+------------+---------------+------+--------+
| Computer | India | 2000 | 1200 |
| TV | United States | 1999 | 150 |
| Calculator | United States | 1999 | 50 |
| Computer | United States | 1999 | 1500 |
| Computer | United States | 2000 | 1500 |
| TV | United States | 2000 | 150 |
| TV | India | 2000 | 100 |
| TV | India | 2000 | 100 |
| Calculator | United States | 2000 | 75 |
| Calculator | India | 2000 | 75 |
| TV | India | 1999 | 100 |
| Computer | India | 1999 | 1200 |
| Computer | United States | 2000 | 1500 |
| Calculator | United States | 2000 | 75 |
+------------+---------------+------+--------+
14 rows in set (0.00 sec)
mysql> Select sales.product, sales.country , sales.year, sum(profit) from
sales group by product, country, year with cube;
+------------+---------------+------+-------------+
| product | country | year | sum(profit) |
+------------+---------------+------+-------------+
| Calculator | India | 2000 | 75 |
| Calculator | United States | 1999 | 50 |
| Calculator | United States | 2000 | 150 |
| Computer | India | 1999 | 1200 |
| Computer | India | 2000 | 1200 |
| Computer | United States | 1999 | 1500 |
| Computer | United States | 2000 | 3000 |
| TV | India | 1999 | 100 |
| TV | India | 2000 | 200 |
| TV | United States | 1999 | 150 |
| TV | United States | 2000 | 150 |
| ALL | India | 1999 | 1300 |
| ALL | India | 2000 | 1475 |
| ALL | United States | 1999 | 1700 |
| ALL | United States | 2000 | 3300 |
| Calculator | ALL | 1999 | 50 |
| Calculator | ALL | 2000 | 225 |
| Computer | ALL | 1999 | 2700 |
| Computer | ALL | 2000 | 4200 |
| TV | ALL | 1999 | 250 |
| TV | ALL | 2000 | 350 |
| Calculator | India | 0 | 75 |
| Calculator | United States | 0 | 200 |
| Computer | India | 0 | 2400 |
| Computer | United States | 0 | 4500 |
| TV | India | 0 | 300 |
| TV | United States | 0 | 300 |
| ALL | ALL | 1999 | 3000 |
| ALL | ALL | 2000 | 4775 |
| ALL | India | 0 | 2775 |
| ALL | United States | 0 | 5000 |
| Calculator | ALL | 0 | 275 |
| Computer | ALL | 0 | 6900 |
| TV | ALL | 0 | 600 |
| ALL | ALL | 0 | 7775 |
+------------+---------------+------+-------------+
35 rows in set (0.00 sec)
MySQL supports now CUBE and ROLLUP extensions, with all functions
that one wishes to use with them.
Those extensions already work in all tested combinations. They work
with UNION's, should work with sub-selects in 4.1 and derived tables.
TODO
----
For the moment, ORDER and LIMIT are disabled for CUBE and ROLLUP. This
however remains to be added later.
Another feature that has to be added later is grouping of select list
itmes in order to alleviate user errors. For the moment, missing
(hidden) columns are not used at all.
Third feature to be done is to make SQL SET OPTION to set values for
all values of the column optionally to:
* ALL (as it is now)
* NULL
* blank
-------------------------------------------------------------------------
@findex HANDLER
@node HANDLER, INSERT, SELECT, Data Manipulation
@subsection @code{HANDLER} Syntax
@ -37823,8 +37964,8 @@ The disadvantages with @code{MERGE} tables are:
@itemize @bullet
@item
You can only use identical @code{MyISAM} tables for a @code{MERGE} table.
@item
@code{AUTO_INCREMENT} columns are not automatically updated on @code{INSERT}.
@c @item
@c @code{AUTO_INCREMENT} columns are not automatically updated on @code{INSERT}.
@item
@code{REPLACE} doesn't work.
@item
@ -37864,13 +38005,13 @@ CREATE TABLE t1 (a INT AUTO_INCREMENT PRIMARY KEY, message CHAR(20));
CREATE TABLE t2 (a INT AUTO_INCREMENT PRIMARY KEY, message CHAR(20));
INSERT INTO t1 (message) VALUES ("Testing"),("table"),("t1");
INSERT INTO t2 (message) VALUES ("Testing"),("table"),("t2");
CREATE TABLE total (a INT NOT NULL, message CHAR(20), KEY(a))
CREATE TABLE total (a INT AUTO_INCREMENT PRIMARY KEY, message CHAR(20))
TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;
@end example
Note that we didn't create a @code{UNIQUE} or @code{PRIMARY KEY} in the
@code{total} table as the key isn't going to be unique in the @code{total}
table.
@c Note that we didn't create a @code{UNIQUE} or @code{PRIMARY KEY} in the
@c @code{total} table as the key isn't going to be unique in the @code{total}
@c table.
Note that you can also manipulate the @file{.MRG} file directly from
the outside of the MySQL server:
@ -37897,6 +38038,10 @@ mysql> SELECT * FROM total;
+---+---------+
@end example
Note that the @code{a} column, though declared as @code{PRIMARY KEY},
is not really unique, as @code{MERGE} table cannot enforce uniqueness
over a set of underlying @code{MyISAM} tables.
To remap a @code{MERGE} table you can do one of the following:
@itemize @bullet
@ -37924,8 +38069,8 @@ The following are the known problems with @code{MERGE} tables:
A @code{MERGE} table cannot maintain @code{UNIQUE} constraints over the
whole table. When you do @code{INSERT}, the data goes into the first or
last table (according to @code{INSERT_METHOD=xxx}) and this @code{MyISAM}
table ensures that the data are unique, but it knows nothing about the
first @code{MyISAM} table.
table ensures that the data are unique, but it knows nothing about
others @code{MyISAM} tables.
@item
@code{DELETE FROM merge_table} used without a @code{WHERE}
will only clear the mapping for the table, not delete everything in the
@ -49735,13 +49880,9 @@ Our TODO section contains what we plan to have in 4.0. @xref{TODO MySQL 4.0}.
@itemize @bullet
@item
Fixed a bug that made the pager option in the mysql client non-functional.
Extended @code{LOG()} function to accept an optional arbitrary base parameter.
@xref{Mathematical functions}.
@item
Added @code{LOG2()} function (useful for finding out how many bits a number would require for storage).
@item
Added @code{LN()} natural logarithm function for compatibility with other databases. It is synonymous with @code{LOG(X)}.
@end itemize
@item
Added full @code{AUTO_INCREMENT} support to @code{MERGE} tables.
Added OLAP functionality.
@c Arjen , please add the following text somewhere appropriate in the
@ -49750,6 +49891,7 @@ text above:
-------------------------------------------------------------------------
Documentation for OLAP extension
Introduction
------------
@ -49880,6 +50022,7 @@ all values of the column optionally to:
-------------------------------------------------------------------------
@node News-4.0.2, News-4.0.1, News-4.0.3, News-4.0.x
@appendixsubsec Changes in release 4.0.2 (01 July 2002)

2
Makefile.am
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@ -20,7 +20,7 @@ AUTOMAKE_OPTIONS = foreign
# These are built from source in the Docs directory
EXTRA_DIST = INSTALL-SOURCE README \
COPYING COPYING.LIB MIRRORS
COPYING COPYING.LIB
SUBDIRS = include @docs_dirs@ @readline_dir@ \
@thread_dirs@ pstack @sql_client_dirs@ \
@sql_server_dirs@ @libmysqld_dirs@ scripts man \

3
include/my_sys.h
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@ -323,8 +323,7 @@ typedef struct st_io_cache_share
int count;
/* actual IO_CACHE that filled the buffer */
struct st_io_cache *active;
/* the following will be implemented whenever the need arises */
#ifdef NOT_IMPLEMENTED
#ifdef NOT_YET_IMPLEMENTED
/* whether the structure should be free'd */
my_bool alloced;
#endif

2
include/myisam.h
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@ -358,7 +358,7 @@ typedef struct st_sort_info
MI_CHECK *param;
enum data_file_type new_data_file_type;
SORT_KEY_BLOCKS *key_block,*key_block_end;
uint kei, total_keys;
uint current_key, total_keys;
my_off_t filelength,dupp,buff_length;
ha_rows max_records;
char *buff;

2
libmysqld/Makefile.am
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@ -49,7 +49,7 @@ sqlsources = convert.cc derror.cc field.cc field_conv.cc filesort.cc \
repl_failsafe.cc slave.cc \
sql_analyse.cc sql_base.cc sql_cache.cc sql_class.cc \
sql_crypt.cc sql_db.cc sql_delete.cc sql_insert.cc sql_lex.cc \
sql_list.cc sql_manager.cc sql_map.cc sql_parse.cc \
sql_list.cc sql_manager.cc sql_map.cc sql_olap.cc sql_parse.cc \
sql_rename.cc sql_repl.cc sql_select.cc sql_do.cc sql_show.cc \
sql_string.cc sql_table.cc sql_test.cc sql_udf.cc \
sql_update.cc sql_yacc.cc table.cc thr_malloc.cc time.cc \

4
myisam/mi_check.c
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@ -3223,7 +3223,7 @@ static int sort_delete_record(MI_SORT_PARAM *sort_param)
old_file=info->dfile;
info->dfile=info->rec_cache.file;
if (sort_info->kei)
if (sort_info->current_key)
{
key=info->lastkey+info->s->base.max_key_length;
if ((error=(*info->s->read_rnd)(info,sort_param->record,info->lastpos,0)) &&
@ -3234,7 +3234,7 @@ static int sort_delete_record(MI_SORT_PARAM *sort_param)
DBUG_RETURN(1);
}
for (i=0 ; i < sort_info->kei ; i++)
for (i=0 ; i < sort_info->current_key ; i++)
{
uint key_length=_mi_make_key(info,i,key,sort_param->record,info->lastpos);
if (_mi_ck_delete(info,i,key,key_length))

87
mysql-test/r/merge.result
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@ -275,12 +275,12 @@ a b
1 2
drop table t3,t1,t2;
drop table if exists t6, t5, t4, t3, t2, t1;
create table t1 (a int not null, b int not null, key(a,b));
create table t2 (a int not null, b int not null, key(a,b));
create table t1 (a int not null, b int not null auto_increment, primary key(a,b));
create table t2 (a int not null, b int not null auto_increment, primary key(a,b));
create table t3 (a int not null, b int not null, key(a,b)) UNION=(t1,t2) INSERT_METHOD=NO;
create table t4 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=NO;
create table t5 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
create table t6 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;
create table t5 (a int not null, b int not null auto_increment, primary key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
create table t6 (a int not null, b int not null auto_increment, primary key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;
show create table t3;
Table Create Table
t3 CREATE TABLE `t3` (
@ -299,18 +299,18 @@ show create table t5;
Table Create Table
t5 CREATE TABLE `t5` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL default '0',
KEY `a` (`a`,`b`)
`b` int(11) NOT NULL auto_increment,
PRIMARY KEY (`a`,`b`)
) TYPE=MRG_MyISAM INSERT_METHOD=FIRST UNION=(t1,t2)
show create table t6;
Table Create Table
t6 CREATE TABLE `t6` (
`a` int(11) NOT NULL default '0',
`b` int(11) NOT NULL default '0',
KEY `a` (`a`,`b`)
`b` int(11) NOT NULL auto_increment,
PRIMARY KEY (`a`,`b`)
) TYPE=MRG_MyISAM INSERT_METHOD=LAST UNION=(t1,t2)
insert into t1 values (1,1),(1,2),(1,3),(1,4);
insert into t2 values (2,1),(2,2),(2,3),(2,4);
insert into t1 values (1,NULL),(1,NULL),(1,NULL),(1,NULL);
insert into t2 values (2,NULL),(2,NULL),(2,NULL),(2,NULL);
select * from t3 order by b,a limit 3;
a b
select * from t4 order by b,a limit 3;
@ -461,6 +461,73 @@ a b
5 2
6 1
6 2
select 1;
1
1
insert into t5 values (1,NULL),(5,NULL);
insert into t6 values (2,NULL),(6,NULL);
select * from t1 order by a,b;
a b
1 1
1 2
1 3
1 4
1 5
4 1
4 2
5 1
5 2
5 3
select * from t2 order by a,b;
a b
2 1
2 2
2 3
2 4
2 5
6 1
6 2
6 3
select * from t5 order by a,b;
a b
1 1
1 2
1 3
1 4
1 5
2 1
2 2
2 3
2 4
2 5
4 1
4 2
5 1
5 2
5 3
6 1
6 2
6 3
select * from t6 order by a,b;
a b
1 1
1 2
1 3
1 4
1 5
2 1
2 2
2 3
2 4
2 5
4 1
4 2
5 1
5 2
5 3
6 1
6 2
6 3
drop table if exists t6, t5, t4, t3, t2, t1;
CREATE TABLE t1 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;
INSERT INTO t1 VALUES (1,1), (2,1);

21
mysql-test/t/merge.test
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@ -129,18 +129,18 @@ drop table t3,t1,t2;
drop table if exists t6, t5, t4, t3, t2, t1;
# first testing of common stuff with new parameters
create table t1 (a int not null, b int not null, key(a,b));
create table t2 (a int not null, b int not null, key(a,b));
create table t1 (a int not null, b int not null auto_increment, primary key(a,b));
create table t2 (a int not null, b int not null auto_increment, primary key(a,b));
create table t3 (a int not null, b int not null, key(a,b)) UNION=(t1,t2) INSERT_METHOD=NO;
create table t4 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=NO;
create table t5 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
create table t6 (a int not null, b int not null, key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;
create table t5 (a int not null, b int not null auto_increment, primary key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=FIRST;
create table t6 (a int not null, b int not null auto_increment, primary key(a,b)) TYPE=MERGE UNION=(t1,t2) INSERT_METHOD=LAST;
show create table t3;
show create table t4;
show create table t5;
show create table t6;
insert into t1 values (1,1),(1,2),(1,3),(1,4);
insert into t2 values (2,1),(2,2),(2,3),(2,4);
insert into t1 values (1,NULL),(1,NULL),(1,NULL),(1,NULL);
insert into t2 values (2,NULL),(2,NULL),(2,NULL),(2,NULL);
select * from t3 order by b,a limit 3;
select * from t4 order by b,a limit 3;
select * from t5 order by b,a limit 3,3;
@ -167,7 +167,16 @@ select * from t2 order by a,b;
select * from t3 order by a,b;
select * from t4 order by a,b;
select * from t5 order by a,b;
# auto_increment
select 1;
insert into t5 values (1,NULL),(5,NULL);
insert into t6 values (2,NULL),(6,NULL);
select * from t1 order by a,b;
select * from t2 order by a,b;
select * from t5 order by a,b;
select * from t6 order by a,b;
drop table if exists t6, t5, t4, t3, t2, t1;
CREATE TABLE t1 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;
INSERT INTO t1 VALUES (1,1), (2,1);
CREATE TABLE t2 ( a int(11) NOT NULL default '0', b int(11) NOT NULL default '0', PRIMARY KEY (a,b)) TYPE=MyISAM;

3
sql/ha_myisammrg.cc
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@ -75,8 +75,7 @@ int ha_myisammrg::write_row(byte * buf)
if (table->time_stamp)
update_timestamp(buf+table->time_stamp-1);
if (table->next_number_field && buf == table->record[0])
return (my_errno=HA_ERR_WRONG_COMMAND);
// update_auto_increment(); - [phi] have to check this before allowing it
update_auto_increment();
return myrg_write(file,buf);
}

2
sql/ha_myisammrg.h
View File

@ -34,7 +34,7 @@ class ha_myisammrg: public handler
const char **bas_ext() const;
ulong table_flags() const
{
return (HA_REC_NOT_IN_SEQ | HA_READ_RND_SAME |
return (HA_REC_NOT_IN_SEQ | HA_READ_RND_SAME | HA_AUTO_PART_KEY |
HA_KEYPOS_TO_RNDPOS | HA_LASTKEY_ORDER |
HA_NULL_KEY | HA_BLOB_KEY);
}

15
sql/handler.cc
View File

@ -628,16 +628,29 @@ longlong handler::get_auto_increment()
{
longlong nr;
int error;
(void) extra(HA_EXTRA_KEYREAD);
index_init(table->next_number_index);
if (!table->next_number_key_offset)
{ // Autoincrement at key-start
error=index_last(table->record[1]);
}
else
{
byte key[MAX_KEY_LENGTH];
key_copy(key,table,table->next_number_index,
table->next_number_key_offset);
error=index_read(table->record[1], key, table->next_number_key_offset,
HA_READ_PREFIX_LAST);
}
if (error)
nr=1;
else
nr=(longlong) table->next_number_field->
val_int_offset(table->rec_buff_length)+1;
(void) extra(HA_EXTRA_NO_KEYREAD);
index_end();
(void) extra(HA_EXTRA_NO_KEYREAD);
return nr;
}