mirror of
https://github.com/MariaDB/server.git
synced 2025-01-19 05:22:25 +01:00
17a87d6063
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.
201 lines
4.9 KiB
Text
201 lines
4.9 KiB
Text
--source include/have_sequence.inc
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--source include/have_innodb.inc
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#
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# Test sequence generation
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#
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CREATE SEQUENCE t1 start with 1 minvalue 1 maxvalue 10 increment by 1 cache 2 cycle;
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show create table t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select NEXT VALUE for t1,seq from seq_1_to_20;
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drop sequence t1;
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CREATE SEQUENCE t1 minvalue 1 maxvalue 10 increment by -1 cache 2 cycle engine=aria;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select next value for t1;
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select next_value,round from t1;
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select NEXT VALUE for t1,seq from seq_1_to_20;
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drop sequence t1;
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CREATE SEQUENCE t1 start with 8 minvalue 1 maxvalue 10 increment by 1 cache 2 nocycle;
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select next value for t1;
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select next value for t1;
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select next value for t1;
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select previous value for t1;
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--error ER_SEQUENCE_RUN_OUT
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select next value for t1;
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select previous value for t1;
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--error ER_SEQUENCE_RUN_OUT
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select next value for t1;
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drop sequence t1;
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create sequence s1 start with 1 cache 2 maxvalue 5;
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select next value for s1;
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select next value for s1;
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select next value for s1;
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select next value for s1;
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select next value for s1;
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--error ER_SEQUENCE_RUN_OUT
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select next value for s1;
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drop sequence s1;
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#
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# Test that flush tables jumps to next next_value
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#
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CREATE SEQUENCE t1 start with 1 minvalue 1 maxvalue 100 increment by 1 cache 10;
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select next value for t1;
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select * from t1;
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flush tables;
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select next value for t1;
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select nextval(t1);
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drop sequence t1;
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#
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# Test currval/previous
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#
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CREATE SEQUENCE t9 start with 1 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
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select previous value for t9;
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select next value for t9;
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select previous value for t9, lastval(t9);
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select next value for t9;
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select previous value for t9, lastval(t9);
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select seq, previous value for t9, NEXT VALUE for t9, previous value for t9 from seq_1_to_20;
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select * from t9;
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drop sequence t9;
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#
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# Check what happens when one refers to a sequence that has been closed/deleted
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#
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CREATE SEQUENCE t1 start with 1 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
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select next value for t1;
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select previous value for t1;
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flush tables;
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select previous value for t1;
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drop sequence t1;
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--error ER_NO_SUCH_TABLE
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select previous value for t1;
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CREATE SEQUENCE t1 start with 5 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
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select previous value for t1;
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select next value for t1;
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select previous value for t1;
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drop sequence t1;
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# This failed in an early build
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CREATE or replace SEQUENCE s1 MINVALUE 1 MAXVALUE 9999999999
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INCREMENT BY 1 START WITH 3984356 CACHE 20 CYCLE engine=innodb;
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show create table s1;
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select * from s1;
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select NEXT VALUE FOR s1;
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select NEXT VALUE FOR s1;
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select NEXT VALUE FOR s1;
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select * from s1;
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FLUSH TABLES;
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select * from s1;
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select NEXT VALUE FOR s1;
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select * from s1;
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drop sequence s1;
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#
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# Explain
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#
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CREATE SEQUENCE t1 start with 5 minvalue 1 maxvalue 10 increment by 1 cache 5 cycle;
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explain select next value for t1;
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explain select next value for t1, min_value from t1;
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drop table t1;
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#
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# Using insert with NEXT VALUE
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#
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CREATE SEQUENCE s1;
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CREATE TABLE t1 (a int);
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insert into t1 values (next value for s1);
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insert into t1 values (next value for s1);
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select * from t1;
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drop table t1,s1;
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#
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# Using update with NEXT VALUE
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#
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CREATE SEQUENCE s1;
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CREATE TABLE t1 (a int primary key auto_increment, b int default 0) engine=myisam;
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insert into t1 values (),(),(),(),(),(),();
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update t1 set b= next value for s1 where a <= 3;
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select * from t1;
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drop table t1,s1;
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#
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# NO CACHE and InnoDB
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#
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CREATE OR REPLACE SEQUENCE s1 MINVALUE 1 MAXVALUE 9999999999 INCREMENT BY 1 START WITH 3984356 nocache CYCLE engine='innodb';
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select * from s1;
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select next value for s1;
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drop sequence s1;
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#
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# Some error testing
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#
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create table t1 (a int);
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--error ER_NOT_SEQUENCE
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select next value for t1;
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drop table t1;
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create sequence t1;
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select next value for t1;
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--error ER_BAD_FIELD_ERROR
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select next value for t1, min_value;
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drop sequence t1;
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