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MDEV-10139 Support for SEQUENCE objects

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Working features:
CREATE OR REPLACE [TEMPORARY] SEQUENCE [IF NOT EXISTS] name
    [ INCREMENT [ BY | = ] increment ]
    [ MINVALUE [=] minvalue | NO MINVALUE ]
    [ MAXVALUE [=] maxvalue | NO MAXVALUE ]
    [ START [ WITH | = ] start ] [ CACHE [=] cache ] [ [ NO ] CYCLE ]
    ENGINE=xxx COMMENT=".."
SELECT NEXT VALUE FOR sequence_name;
SELECT NEXTVAL(sequence_name);
SELECT PREVIOUS VALUE FOR sequence_name;
SELECT LASTVAL(sequence_name);

SHOW CREATE SEQUENCE sequence_name;
SHOW CREATE TABLE sequence_name;
CREATE TABLE sequence-structure ... SEQUENCE=1
ALTER TABLE sequence RENAME TO sequence2;
RENAME TABLE sequence TO sequence2;
DROP [TEMPORARY] SEQUENCE  [IF EXISTS] sequence_names

Missing features
- SETVAL(value,sequence_name), to be used with replication.
- Check replication, including checking that sequence tables are marked
  not transactional.
- Check that a commit happens for NEXT VALUE that changes table data (may
  already work)
- ALTER SEQUENCE. ANSI SQL version of setval.
- Share identical sequence entries to not add things twice to table list.
- testing insert/delete/update/truncate/load data
- Run and fix Alibaba sequence tests (part of mysql-test/suite/sql_sequence)
- Write documentation for NEXT VALUE / PREVIOUS_VALUE
- NEXTVAL in DEFAULT
  - Ensure that NEXTVAL in DEFAULT uses database from base table
- Two NEXTVAL for same row should give same answer.
- Oracle syntax sequence_table.nextval, without any FOR or FROM.
- Sequence tables are treated as 'not read constant tables' by SELECT; Would
  be better if we would have a separate list for sequence tables so that
  select doesn't know about them, except if refereed to with FROM.

Other things done:
- Improved output for safemalloc backtrack
- frm_type_enum changed to Table_type
- Removed lex->is_view and replaced with lex->table_type. This allows
  use to more easy check if item is view, sequence or table.
- Added table flag HA_CAN_TABLES_WITHOUT_ROLLBACK, needed for handlers
  that want's to support sequences
- Added handler calls:
 - engine_name(), to simplify getting engine name for partition and sequences
 - update_first_row(), to be able to do efficient sequence implementations.
 - Made binlog_log_row() global to be able to call it from ha_sequence.cc
- Added handler variable: row_already_logged, to be able to flag that the
  changed row is already logging to replication log.
- Added CF_DB_CHANGE and CF_SCHEMA_CHANGE flags to simplify
  deny_updates_if_read_only_option()
- Added sp_add_cfetch() to avoid new conflicts in sql_yacc.yy
- Moved code for add_table_options() out from sql_show.cc::show_create_table()
- Added String::append_longlong() and used it in sql_show.cc to simplify code.
- Added extra option to dd_frm_type() and ha_table_exists to indicate if
  the table is a sequence. Needed by DROP SQUENCE to not drop a table.
This commit is contained in:
Monty
2017-03-25 23:36:56 +02:00
committed by Alexander Barkov
parent 546e7aa96f
commit 17a87d6063
93 changed files with 8009 additions and 500 deletions
Download Patch File Download Diff File Expand all files Collapse all files

404
mysql-test/suite/sql_sequence/next.result Normal file
View File

@ -0,0 +1,404 @@
CREATE SEQUENCE t1 start with 1 minvalue 1 maxvalue 10 increment by 1 cache 2 cycle;
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`next_value` bigint(21) NOT NULL COMMENT 'next not cached value',
`min_value` bigint(21) NOT NULL COMMENT 'min value',
`max_value` bigint(21) NOT NULL COMMENT 'max value',
`start` bigint(21) NOT NULL COMMENT 'start value',
`increment` bigint(21) NOT NULL COMMENT 'increment value',
`cache` bigint(21) NOT NULL COMMENT 'cache size',
`cycle` tinyint(1) unsigned NOT NULL COMMENT 'cycle state',
`round` bigint(21) NOT NULL COMMENT 'How many cycles has been done'
) ENGINE=MyISAM SEQUENCE=1
select next value for t1;
next value for t1
1
select next_value,round from t1;
next_value round
3 0
select next value for t1;
next value for t1
2
select next_value,round from t1;
next_value round
3 0
select next value for t1;
next value for t1
3
select next_value,round from t1;
next_value round
5 0
select next value for t1;
next value for t1
4
select next_value,round from t1;
next_value round
5 0
select next value for t1;
next value for t1
5
select next_value,round from t1;
next_value round
7 0
select next value for t1;
next value for t1
6
select next_value,round from t1;
next_value round
7 0
select next value for t1;
next value for t1
7
select next_value,round from t1;
next_value round
9 0
select next value for t1;
next value for t1
8
select next_value,round from t1;
next_value round
9 0
select next value for t1;
next value for t1
9
select next_value,round from t1;
next_value round
11 0
select next value for t1;
next value for t1
10
select next_value,round from t1;
next_value round
11 0
select next value for t1;
next value for t1
1
select next_value,round from t1;
next_value round
3 1
select NEXT VALUE for t1,seq from seq_1_to_20;
NEXT VALUE for t1 seq
2 1
3 2
4 3
5 4
6 5
7 6
8 7
9 8
10 9
1 10
2 11
3 12
4 13
5 14
6 15
7 16
8 17
9 18
10 19
1 20
drop sequence t1;
CREATE SEQUENCE t1 minvalue 1 maxvalue 10 increment by -1 cache 2 cycle engine=aria;
select next value for t1;
next value for t1
10
select next_value,round from t1;
next_value round
8 0
select next value for t1;
next value for t1
9
select next_value,round from t1;
next_value round
8 0
select next value for t1;
next value for t1
8
select next_value,round from t1;
next_value round
6 0
select next value for t1;
next value for t1
7
select next_value,round from t1;
next_value round
6 0
select next value for t1;
next value for t1
6
select next_value,round from t1;
next_value round
4 0
select next value for t1;
next value for t1
5
select next_value,round from t1;
next_value round
4 0
select next value for t1;
next value for t1
4
select next_value,round from t1;
next_value round
2 0
select next value for t1;
next value for t1
3
select next_value,round from t1;
next_value round
2 0
select next value for t1;
next value for t1
2
select next_value,round from t1;
next_value round
0 0
select next value for t1;
next value for t1
1
select next_value,round from t1;
next_value round
0 0
select next value for t1;
next value for t1
10
select next_value,round from t1;
next_value round
8 1
select NEXT VALUE for t1,seq from seq_1_to_20;
NEXT VALUE for t1 seq
9 1
8 2
7 3
6 4
5 5
4 6
3 7
2 8
1 9
10 10
9 11
8 12
7 13
6 14
5 15
4 16
3 17
2 18
1 19
10 20
drop sequence t1;
CREATE SEQUENCE t1 start with 8 minvalue 1 maxvalue 10 increment by 1 cache 2 nocycle;
select next value for t1;
next value for t1
8
select next value for t1;
next value for t1
9
select next value for t1;
next value for t1
10
select previous value for t1;
previous value for t1
10
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
select previous value for t1;
previous value for t1
NULL
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
drop sequence t1;
create sequence s1 start with 1 cache 2 maxvalue 5;
select next value for s1;
next value for s1
1
select next value for s1;
next value for s1
2
select next value for s1;
next value for s1
3
select next value for s1;
next value for s1
4
select next value for s1;
next value for s1
5
select next value for s1;
ERROR HY000: Sequence 'test.s1' has run out
drop sequence s1;
CREATE SEQUENCE t1 start with 1 minvalue 1 maxvalue 100 increment by 1 cache 10;
select next value for t1;
next value for t1
1
select * from t1;
next_value min_value max_value start increment cache cycle round
11 1 100 1 1 10 0 0
flush tables;
select next value for t1;
next value for t1
11
select nextval(t1);
nextval(t1)
12
drop sequence t1;
CREATE SEQUENCE t9 start with 1 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
select previous value for t9;
previous value for t9
NULL
select next value for t9;
next value for t9
1
select previous value for t9, lastval(t9);
previous value for t9 lastval(t9)
1 1
select next value for t9;
next value for t9
2
select previous value for t9, lastval(t9);
previous value for t9 lastval(t9)
2 2
select seq, previous value for t9, NEXT VALUE for t9, previous value for t9 from seq_1_to_20;
seq previous value for t9 NEXT VALUE for t9 previous value for t9
1 2 3 3
2 3 4 4
3 4 5 5
4 5 6 6
5 6 7 7
6 7 8 8
7 8 9 9
8 9 10 10
9 10 1 1
10 1 2 2
11 2 3 3
12 3 4 4
13 4 5 5
14 5 6 6
15 6 7 7
16 7 8 8
17 8 9 9
18 9 10 10
19 10 1 1
20 1 2 2
select * from t9;
next_value min_value max_value start increment cache cycle round
6 1 10 1 1 5 1 2
drop sequence t9;
CREATE SEQUENCE t1 start with 1 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
select next value for t1;
next value for t1
1
select previous value for t1;
previous value for t1
1
flush tables;
select previous value for t1;
previous value for t1
1
drop sequence t1;
select previous value for t1;
ERROR 42S02: Table 'test.t1' doesn't exist
CREATE SEQUENCE t1 start with 5 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
select previous value for t1;
previous value for t1
NULL
select next value for t1;
next value for t1
5
select previous value for t1;
previous value for t1
5
drop sequence t1;
CREATE or replace SEQUENCE s1 MINVALUE 1 MAXVALUE 9999999999
INCREMENT BY 1 START WITH 3984356 CACHE 20 CYCLE engine=innodb;
show create table s1;
Table Create Table
s1 CREATE TABLE `s1` (
`next_value` bigint(21) NOT NULL COMMENT 'next not cached value',
`min_value` bigint(21) NOT NULL COMMENT 'min value',
`max_value` bigint(21) NOT NULL COMMENT 'max value',
`start` bigint(21) NOT NULL COMMENT 'start value',
`increment` bigint(21) NOT NULL COMMENT 'increment value',
`cache` bigint(21) NOT NULL COMMENT 'cache size',
`cycle` tinyint(1) unsigned NOT NULL COMMENT 'cycle state',
`round` bigint(21) NOT NULL COMMENT 'How many cycles has been done'
) ENGINE=InnoDB SEQUENCE=1
select * from s1;
next_value min_value max_value start increment cache cycle round
3984356 1 9999999999 3984356 1 20 1 0
select NEXT VALUE FOR s1;
NEXT VALUE FOR s1
3984356
select NEXT VALUE FOR s1;
NEXT VALUE FOR s1
3984357
select NEXT VALUE FOR s1;
NEXT VALUE FOR s1
3984358
select * from s1;
next_value min_value max_value start increment cache cycle round
3984376 1 9999999999 3984356 1 20 1 0
FLUSH TABLES;
select * from s1;
next_value min_value max_value start increment cache cycle round
3984376 1 9999999999 3984356 1 20 1 0
select NEXT VALUE FOR s1;
NEXT VALUE FOR s1
3984376
select * from s1;
next_value min_value max_value start increment cache cycle round
3984396 1 9999999999 3984356 1 20 1 0
drop sequence s1;
CREATE SEQUENCE t1 start with 5 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
explain select next value for t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL No tables used
explain select next value for t1, min_value from t1;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 system NULL NULL NULL NULL 1
drop table t1;
CREATE SEQUENCE s1;
CREATE TABLE t1 (a int);
insert into t1 values (next value for s1);
insert into t1 values (next value for s1);
select * from t1;
a
1
2
drop table t1,s1;
CREATE SEQUENCE s1;
CREATE TABLE t1 (a int primary key auto_increment, b int default 0) engine=myisam;
insert into t1 values (),(),(),(),(),(),();
update t1 set b= next value for s1 where a <= 3;
select * from t1;
a b
1 1
2 2
3 3
4 0
5 0
6 0
7 0
drop table t1,s1;
CREATE OR REPLACE SEQUENCE s1 MINVALUE 1 MAXVALUE 9999999999 INCREMENT BY 1 START WITH 3984356 nocache CYCLE engine='innodb';
select * from s1;
next_value min_value max_value start increment cache cycle round
3984356 1 9999999999 3984356 1 0 1 0
select next value for s1;
next value for s1
3984356
drop sequence s1;
create table t1 (a int);
select next value for t1;
ERROR 42S02: 'test.t1' is not a SEQUENCE
drop table t1;
create sequence t1;
select next value for t1;
next value for t1
1
select next value for t1, min_value;
ERROR 42S22: Unknown column 'min_value' in 'field list'
drop sequence t1;