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MDEV-28152 Features for sequences

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- Add `as <int_type>` to sequence creation options
  - int_type can be signed or unsigned integer types, including
    tinyint, smallint, mediumint, int and bigint
  - Limitation: when alter sequence as <new_int_type>, cannot have any
    other alter options in the same statement
  - Limitation: increment remains signed longlong, and the hidden
    constraint (cache_size x abs(increment) < longlong_max) stays for
    unsigned types. This means for bigint unsigned, neither
    abs(increment) nor (cache_size x abs(increment)) can be between
    longlong_max and ulonglong_max
- Truncating maxvalue and minvalue from user input to the nearest max
  or min value of the type, plus or minus 1. When the truncation
  happens, a warning is emitted
- Information schema table for sequences
This commit is contained in:
Yuchen Pei
2024-01-04 12:12:50 +11:00
parent eeba940311
commit 374783c3d9
34 changed files with 3472 additions and 264 deletions
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303
mysql-test/suite/sql_sequence/next.result
View File

@@ -548,3 +548,306 @@ SELECT SETVAL (v,0);
ERROR 42S02: 'test.v' is not a SEQUENCE
UNLOCK TABLES;
DROP VIEW v;
#
# MDEV-28152 Features for sequence
#
create or replace sequence t1 as tinyint unsigned minvalue 1 maxvalue 2;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` as tinyint unsigned start with 1 minvalue 1 maxvalue 2 increment by 1 cache 1000 nocycle ENGINE=MyISAM
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`next_not_cached_value` tinyint(5) unsigned NOT NULL,
`minimum_value` tinyint(5) unsigned NOT NULL,
`maximum_value` tinyint(5) unsigned NOT NULL,
`start_value` tinyint(5) unsigned NOT NULL COMMENT 'start value when sequences is created or value if RESTART is used',
`increment` bigint(21) NOT NULL COMMENT 'increment value',
`cache_size` bigint(21) unsigned NOT NULL,
`cycle_option` tinyint(1) unsigned NOT NULL COMMENT '0 if no cycles are allowed, 1 if the sequence should begin a new cycle when maximum_value is passed',
`cycle_count` bigint(21) NOT NULL COMMENT 'How many cycles have been done'
) ENGINE=MyISAM SEQUENCE=1
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 1 2 1 1 1000 0 0
select next value for t1;
next value for t1
1
select next value for t1;
next value for t1
2
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
create or replace sequence t1 as tinyint unsigned minvalue 1 maxvalue 2 cycle;
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` as tinyint unsigned start with 1 minvalue 1 maxvalue 2 increment by 1 cache 1000 cycle ENGINE=MyISAM
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`next_not_cached_value` tinyint(5) unsigned NOT NULL,
`minimum_value` tinyint(5) unsigned NOT NULL,
`maximum_value` tinyint(5) unsigned NOT NULL,
`start_value` tinyint(5) unsigned NOT NULL COMMENT 'start value when sequences is created or value if RESTART is used',
`increment` bigint(21) NOT NULL COMMENT 'increment value',
`cache_size` bigint(21) unsigned NOT NULL,
`cycle_option` tinyint(1) unsigned NOT NULL COMMENT '0 if no cycles are allowed, 1 if the sequence should begin a new cycle when maximum_value is passed',
`cycle_count` bigint(21) NOT NULL COMMENT 'How many cycles have been done'
) ENGINE=MyISAM SEQUENCE=1
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
1 1 2 1 1 1000 1 0
select next value for t1;
next value for t1
1
select next value for t1;
next value for t1
2
select next value for t1;
next value for t1
1
create or replace sequence t1 minvalue -23 maxvalue 99999 as tinyint;
Warnings:
Note 1292 Truncated incorrect INTEGER value: 'MAXVALUE'
show create sequence t1;
Table Create Table
t1 CREATE SEQUENCE `t1` as tinyint start with -23 minvalue -23 maxvalue 126 increment by 1 cache 1000 nocycle ENGINE=MyISAM
show create table t1;
Table Create Table
t1 CREATE TABLE `t1` (
`next_not_cached_value` tinyint(5) NOT NULL,
`minimum_value` tinyint(5) NOT NULL,
`maximum_value` tinyint(5) NOT NULL,
`start_value` tinyint(5) NOT NULL COMMENT 'start value when sequences is created or value if RESTART is used',
`increment` bigint(21) NOT NULL COMMENT 'increment value',
`cache_size` bigint(21) unsigned NOT NULL,
`cycle_option` tinyint(1) unsigned NOT NULL COMMENT '0 if no cycles are allowed, 1 if the sequence should begin a new cycle when maximum_value is passed',
`cycle_count` bigint(21) NOT NULL COMMENT 'How many cycles have been done'
) ENGINE=MyISAM SEQUENCE=1
select * from t1;
next_not_cached_value minimum_value maximum_value start_value increment cache_size cycle_option cycle_count
-23 -23 126 -23 1 1000 0 0
select next value for t1;
next value for t1
-23
select next value for t1;
next value for t1
-22
select next value for t1;
next value for t1
-21
create or replace sequence t1 as bigint unsigned start with 18446744073709551614;
select previous value for t1;
previous value for t1
NULL
select next value for t1;
next value for t1
18446744073709551614
select previous value for t1;
previous value for t1
18446744073709551614
create or replace sequence t1 as tinyint start with 126;
select next value for t1;
next value for t1
126
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as tinyint unsigned start with 254;
select next value for t1;
next value for t1
254
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as smallint start with 32766;
select next value for t1;
next value for t1
32766
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as smallint unsigned start with 65534;
select next value for t1;
next value for t1
65534
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as mediumint start with 8388606;
select next value for t1;
next value for t1
8388606
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as mediumint unsigned start with 16777214;
select next value for t1;
next value for t1
16777214
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as int start with 2147483646;
select next value for t1;
next value for t1
2147483646
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as int unsigned start with 4294967294;
select next value for t1;
next value for t1
4294967294
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as bigint start with 9223372036854775806;
select next value for t1;
next value for t1
9223372036854775806
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as bigint unsigned start with 18446744073709551614;
select next value for t1;
next value for t1
18446744073709551614
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
1
create or replace sequence t1 as tinyint start with -127 increment -1;
select next value for t1;
next value for t1
-127
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
-1
create or replace sequence t1 as tinyint unsigned start with 1 increment -1;
select next value for t1;
next value for t1
1
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
254
create or replace sequence t1 as smallint start with -32767 increment -1;
select next value for t1;
next value for t1
-32767
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
-1
create or replace sequence t1 as smallint unsigned start with 1 increment -1;
select next value for t1;
next value for t1
1
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
65534
create or replace sequence t1 as mediumint start with -8388607 increment -1;
select next value for t1;
next value for t1
-8388607
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
-1
create or replace sequence t1 as mediumint unsigned start with 1 increment -1;
select next value for t1;
next value for t1
1
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
16777214
create or replace sequence t1 as int start with -2147483647 increment -1;
select next value for t1;
next value for t1
-2147483647
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
-1
create or replace sequence t1 as int unsigned start with 1 increment -1;
select next value for t1;
next value for t1
1
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
4294967294
call mtr.add_suppression("signed integer overflow: -9223372036854775807 \\+ -1000 cannot be represented in type 'long long int'");
create or replace sequence t1 as bigint start with -9223372036854775807 increment -1;
select next value for t1;
next value for t1
-9223372036854775807
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
-1
create or replace sequence t1 as bigint unsigned start with 1 increment -1;
select next value for t1;
next value for t1
1
select next value for t1;
ERROR HY000: Sequence 'test.t1' has run out
alter sequence t1 cycle;
select next value for t1;
next value for t1
18446744073709551614
drop sequence t1;
#
# End of 11.4 tests
#