mirror of
https://github.com/MariaDB/server.git
synced 2025-02-07 06:12:18 +01:00
727491b72a
This includes all test changes from
"Changing all cost calculation to be given in milliseconds"
and forwards.
Some of the things that caused changes in the result files:
- As part of fixing tests, I added 'echo' to some comments to be able to
easier find out where things where wrong.
- MATERIALIZED has now a higher cost compared to X than before. Because
of this some MATERIALIZED types have changed to DEPENDEND SUBQUERY.
- Some test cases that required MATERIALIZED to repeat a bug was
changed by adding more rows to force MATERIALIZED to happen.
- 'Filtered' in SHOW EXPLAIN has in many case changed from 100.00 to
something smaller. This is because now filtered also takes into
account the smallest possible ref access and filters, even if they
where not used. Another reason for 'Filtered' being smaller is that
we now also take into account implicit filtering done for subqueries
using FIRSTMATCH.
(main.subselect_no_exists_to_in)
This is caluculated in best_access_path() and stored in records_out.
- Table orders has changed because more accurate costs.
- 'index' and 'ALL' for small tables has changed to use 'range' or
'ref' because of optimizer_scan_setup_cost.
- index can be changed to 'range' as 'range' optimizer assumes we don't
have to read the blocks from disk that range optimizer has already read.
This can be confusing in the case where there is no obvious where clause
but instead there is a hidden 'key_column > NULL' added by the optimizer.
(main.subselect_no_exists_to_in)
- Scan on primary clustered key does not report 'Using Index' anymore
(It's a table scan, not an index scan).
- For derived tables, the number of rows is now 100 instead of 2,
which can be seen in EXPLAIN.
- More tests have "Using index for group by" as the cost of this
optimization is now more correct (lower).
- A primary key could be preferred for a normal key, even if it would
access more rows, as it's faster to do 1 lokoup and 3 'index_next' on a
clustered primary key than one lookup trough a secondary.
(main.stat_tables_innodb)
Notes:
- There was a 4.7% more calls to best_extension_by_limited_search() in
the main.greedy_optimizer test. However examining the test results
it looked that the plans where slightly better (eq_ref where more
chained together) so I assume this is ok.
- I have verified a few test cases where there was notable/unexpected
changes in the plan and in all cases the new optimizer plans where
faster. (main.greedy_optimizer and some others)
674 lines
16 KiB
Text
674 lines
16 KiB
Text
SET @@session.default_storage_engine = 'InnoDB';
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create table t1 (a int,
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b int as (-a),
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c int as (-a) persistent);
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set sql_warnings = 1;
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set @@optimizer_scan_setup_cost=0;
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#
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# *** INSERT ***
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#
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# INSERT INTO tbl_name VALUES... DEFAULT is specified against vcols
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insert into t1 values (1,default,default);
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select * from t1;
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a b c
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1 -1 -1
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delete from t1;
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select * from t1;
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a b c
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# INSERT INTO tbl_name VALUES... NULL is specified against vcols
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insert into t1 values (1,null,null);
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select * from t1;
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a b c
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1 -1 -1
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delete from t1;
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select * from t1;
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a b c
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# INSERT INTO tbl_name VALUES... a non-NULL value is specified against vcols
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insert ignore into t1 values (1,2,3);
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Warnings:
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Warning 1906 The value specified for generated column 'b' in table 't1' has been ignored
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Warning 1906 The value specified for generated column 'c' in table 't1' has been ignored
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select * from t1;
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a b c
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1 -1 -1
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delete from t1;
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select * from t1;
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a b c
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# INSERT INTO tbl_name (<non_vcol_list>) VALUES...
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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delete from t1;
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select * from t1;
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a b c
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# INSERT INTO tbl_name (<normal+vcols>) VALUES... DEFAULT is specified
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# against vcols
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insert into t1 (a,b) values (1,default), (2,default);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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delete from t1;
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select * from t1;
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a b c
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# INSERT INTO tbl_name (<normal+vcols>) VALUES... NULL is specified against vcols
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insert into t1 (a,b) values (1,null), (2,null);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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delete from t1;
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select * from t1;
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a b c
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# INSERT INTO tbl_name (<normal+vcols>) VALUES... a non-NULL value is specified
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# against vcols
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insert ignore into t1 (a,b) values (1,3), (2,4);
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Warnings:
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Warning 1906 The value specified for generated column 'b' in table 't1' has been ignored
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Warning 1906 The value specified for generated column 'b' in table 't1' has been ignored
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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delete from t1;
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select * from t1;
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a b c
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drop table t1;
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# Table with UNIQUE non-vcol field. INSERT INTO tbl_name VALUES... ON DUPLICATE
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# KEY UPDATE <non_vcol>=expr, <vcol>=expr
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create table t1 (a int unique,
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b int as (-a),
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c int as (-a) persistent);
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insert into t1 values (1,default,default);
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insert into t1 values (1,default,default)
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on duplicate key update a=2, b=default;
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select a,b,c from t1;
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a b c
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2 -2 -2
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delete from t1 where b in (1,2);
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select * from t1;
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a b c
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2 -2 -2
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drop table t1;
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# Table with UNIQUE vcol field. INSERT INTO tbl_name VALUES... ON DUPLICATE
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# KEY UPDATE <non_vcol>=expr, <vcol>=expr
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create table t1 (a int,
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b int as (-a),
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c int as (-a) persistent unique);
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insert into t1 values (1,default,default);
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insert into t1 values (1,default,default)
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on duplicate key update a=2, b=default;
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select a,b,c from t1;
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a b c
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2 -2 -2
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# CREATE new_table ... LIKE old_table
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# INSERT INTO new_table SELECT * from old_table
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create table t2 like t1;
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insert ignore into t2 select * from t1;
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Warnings:
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Warning 1906 The value specified for generated column 'b' in table 't2' has been ignored
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Warning 1906 The value specified for generated column 'c' in table 't2' has been ignored
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select * from t1;
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a b c
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2 -2 -2
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drop table t2;
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# CREATE new_table ... LIKE old_table INSERT INTO new_table (<non-vcols>, <vcols>)
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# SELECT <non-vcols>, <vcols> from old_table
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insert into t1 values (1,default,default);
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select * from t1;
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a b c
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2 -2 -2
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1 -1 -1
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create table t2 like t1;
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insert ignore into t2 (a,b) select a,b from t1;
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Warnings:
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Warning 1906 The value specified for generated column 'b' in table 't2' has been ignored
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Warning 1906 The value specified for generated column 'b' in table 't2' has been ignored
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select * from t2;
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a b c
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2 -2 -2
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1 -1 -1
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drop table t2;
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drop table t1;
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#
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# *** UPDATE ***
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#
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# UPDATE tbl_name SET non-vcol=expr WHERE non-vcol=expr
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create table t1 (a int,
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b int as (-a),
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c int as (-a) persistent);
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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update t1 set a=3 where a=2;
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select * from t1;
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a b c
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1 -1 -1
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3 -3 -3
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delete from t1;
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select * from t1;
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a b c
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# UPDATE tbl_name SET vcol=expr WHERE non-vcol=expr
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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update ignore t1 set c=3 where a=2;
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Warnings:
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Warning 1906 The value specified for generated column 'c' in table 't1' has been ignored
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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delete from t1;
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select * from t1;
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a b c
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# UPDATE tbl_name SET non-vcol=expr WHERE vcol=expr
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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update t1 set a=3 where b=-2;
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select * from t1;
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a b c
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1 -1 -1
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3 -3 -3
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delete from t1;
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select * from t1;
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a b c
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# UPDATE tbl_name SET vcol=expr WHERE vcol=expr
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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update ignore t1 set c=3 where b=-2;
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Warnings:
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Warning 1906 The value specified for generated column 'c' in table 't1' has been ignored
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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delete from t1;
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select * from t1;
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a b c
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drop table t1;
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# INDEX created on vcol
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# UPDATE tbl_name SET non-vcol=expr WHERE vcol=const
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create table t1 (a int,
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b int as (-a),
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c int as (-a) persistent unique);
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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update t1 set a=3 where c=-2;
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select * from t1;
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a b c
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1 -1 -1
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3 -3 -3
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delete from t1;
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select * from t1;
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a b c
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# INDEX created on vcol
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# UPDATE tbl_name SET non-vcol=expr WHERE vcol=between const1 and const2
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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update t1 set a=3 where c between -3 and -2;
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select * from t1;
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a b c
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1 -1 -1
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3 -3 -3
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delete from t1;
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select * from t1;
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a b c
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# No INDEX created on vcol
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# UPDATE tbl_name SET non-vcol=expr WHERE vcol=between const1 and const2
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insert into t1 (a) values (1), (2);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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update t1 set a=3 where b between -3 and -2;
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select * from t1;
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a b c
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1 -1 -1
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3 -3 -3
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delete from t1;
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select * from t1;
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a b c
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# INDEX created on vcol
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# UPDATE tbl_name SET non-vcol=expr
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# WHERE vcol=between const1 and const2 ORDER BY vcol
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insert into t1 (a) values (1), (2), (3), (4), (5);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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update t1 set a=6 where c between -1 and 0
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order by c;
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select * from t1;
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a b c
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6 -6 -6
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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delete from t1 where c between -6 and 0;
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select * from t1;
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a b c
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# INDEX created on vcol
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# UPDATE tbl_name SET non-vcol=expr
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# WHERE vcol=between const1 and const2 ORDER BY vcol LIMIT 2
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insert into t1 (a) values (1), (2), (3), (4), (5);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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update t1 set a=6 where c between -1 and 0
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order by c limit 2;
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select * from t1;
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a b c
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6 -6 -6
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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delete from t1 where c between -2 and 0 order by c;
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select * from t1;
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a b c
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6 -6 -6
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3 -3 -3
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4 -4 -4
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5 -5 -5
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delete from t1;
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# INDEX created on vcol
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# UPDATE tbl_name SET non-vcol=expr
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# WHERE indexed vcol=between const1 and const2 and non-indexed vcol=const3
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insert into t1 (a) values (1), (2), (3), (4), (5);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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update t1 set a=6 where (c between -2 and 0) and (b=-1);
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select * from t1;
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a b c
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6 -6 -6
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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delete from t1;
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# INDEX created on vcol
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# UPDATE tbl_name SET non-vcol=expr
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# WHERE indexed vcol=between const1 and const2 and non-indexed vcol=const3
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# ORDER BY indexed vcol
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insert into t1 (a) values (1), (2), (3), (4), (5);
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select * from t1;
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a b c
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1 -1 -1
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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update t1 set a=6 where (c between -2 and 0) and (b=-1) order by c;
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select * from t1;
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a b c
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6 -6 -6
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2 -2 -2
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3 -3 -3
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4 -4 -4
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5 -5 -5
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delete from t1;
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drop table t1;
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#
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# Verify ON UPDATE/DELETE actions of FOREIGN KEYs
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create table t2 (a int primary key, name varchar(10));
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create table t1 (a int primary key, b int as (a % 10) persistent);
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insert into t2 values (1, 'value1'), (2,'value2'), (3,'value3');
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insert into t1 (a) values (1),(2),(3);
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select * from t1;
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a b
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1 1
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2 2
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3 3
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select * from t2;
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a name
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1 value1
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2 value2
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3 value3
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select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
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a b name
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1 1 value1
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2 2 value2
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3 3 value3
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# - ON UPDATE RESTRICT
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alter table t1 add foreign key (b) references t2(a) on update restrict;
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insert into t1 (a) values (4);
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ERROR 23000: Cannot add or update a child row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
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update t2 set a=4 where a=3;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
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select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
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a b name
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1 1 value1
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2 2 value2
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3 3 value3
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alter table t1 drop foreign key t1_ibfk_1;
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# - ON DELETE RESTRICT
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alter table t1 add foreign key (b) references t2(a) on delete restrict;
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delete from t2 where a=3;
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ERROR 23000: Cannot delete or update a parent row: a foreign key constraint fails (`test`.`t1`, CONSTRAINT `t1_ibfk_1` FOREIGN KEY (`b`) REFERENCES `t2` (`a`))
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select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
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a b name
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1 1 value1
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2 2 value2
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3 3 value3
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select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
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a b name
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1 1 value1
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2 2 value2
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3 3 value3
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alter table t1 drop foreign key t1_ibfk_1;
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# - ON DELETE CASCADE
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alter table t1 add foreign key (b) references t2(a) on delete cascade;
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delete from t2 where a=3;
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select t1.a, t1.b, t2.name from t1,t2 where t1.b=t2.a;
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a b name
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1 1 value1
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2 2 value2
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select t1.a, t1.b, t2.name from t1 left outer join t2 on (t1.b=t2.a);
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a b name
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1 1 value1
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2 2 value2
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alter table t1 drop foreign key t1_ibfk_1;
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drop table t1;
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drop table t2;
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#
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# *** REPLACE ***
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#
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# UNIQUE INDEX on vcol
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# REPLACE tbl_name (non-vcols) VALUES (non-vcols);
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create table t1 (a int,
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b int as (-a),
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c int as (-a) persistent unique,
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d varchar(16));
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insert into t1 (a,d) values (1,'a'), (2,'b');
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select * from t1;
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a b c d
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1 -1 -1 a
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2 -2 -2 b
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replace t1 (a,d) values (1,'c');
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select * from t1;
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a b c d
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1 -1 -1 c
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2 -2 -2 b
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delete from t1;
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select * from t1;
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a b c d
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set sql_warnings = 0;
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drop table t1;
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#
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# MDEV-9093: Persistent computed column is not updated when
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# update query contains join
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#
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CREATE TABLE `t1` (
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`id` bigint(20) NOT NULL,
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`name` varchar(254) DEFAULT NULL,
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`name_hash` varchar(64) AS (sha1(name)) PERSISTENT,
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PRIMARY KEY (`id`)
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);
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insert into t1(id,name) values (2050, 'name1'),(2051, 'name2'),(2041, 'name3');
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create table t2 (id bigint);
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insert into t2 values (2050),(2051),(2041);
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select * from t1;
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id name name_hash
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2041 name3 1aefcd1b0f39da45fa1fd7236f683c907c15ef82
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2050 name1 9b46b0dd3a8083c070c3b9953bb5f3f95c5ab4da
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2051 name2 39ea84acf1fef629fef18a9c6f5799bba32ecc25
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update t1 join t2 using(id) set name = concat(name,
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'+1') where t1.id in (2051,2041);
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select * from t1;
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id name name_hash
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2041 name3+1 93c9096df48221428de46e146abc9f4f94bf7d2e
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2050 name1 9b46b0dd3a8083c070c3b9953bb5f3f95c5ab4da
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2051 name2+1 fd4f236320db3956a5ec073c5ec39707d7f05708
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drop table t1,t2;
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#
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# Test error handling with virtual columns
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#
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CREATE TABLE IF NOT EXISTS t1 (
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f1 DOUBLE,
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f2 DOUBLE NOT NULL DEFAULT '0',
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f3 DOUBLE,
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f4 DOUBLE NOT NULL DEFAULT '0',
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v1 DOUBLE AS ( ( f1 DIV ( f1 ) ) <= f2 ) VIRTUAL,
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v2 DOUBLE AS ( ( f2 DIV ( f2 ) ) <= f2 ) VIRTUAL,
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KEY (v2)
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);
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set sql_mode='strict_all_tables,error_for_division_by_zero';
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INSERT INTO t1 (f1, f2, f3, f4) VALUES (0, 0, 0, 0);
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ERROR 22012: Division by 0
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INSERT INTO t1 (f1, f2, f3, f4) VALUES (1, 1, 1, 1);
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INSERT INTO t1 (f1, f2, f3, f4) VALUES (1, 0, 1, 1);
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ERROR 22012: Division by 0
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|
INSERT IGNORE INTO t1 (f1, f2, f3, f4) VALUES (1, 0, 1, 1);
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Warnings:
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Warning 1365 Division by 0
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INSERT INTO t1 (f1, f2, f3, f4) VALUES (0, 1, 1, 1);
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select v1 from t1;
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v1
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1
|
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0
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NULL
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Warnings:
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Warning 1365 Division by 0
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|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (0,0,0,0), (2,2,2,2);
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ERROR 22012: Division by 0
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|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (3,3,3,3), (4,4,4,4);
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INSERT INTO t1 (f1, f2, f3, f4) VALUES (5,5,5,5), (1,0,0,0);
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ERROR 22012: Division by 0
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|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (6,6,0,0);
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INSERT INTO t1 ( f1, f2, f3, f4 ) SELECT f3, f4, f3, f4 FROM t1;
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|
ERROR 22012: Division by 0
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|
select count(*) from t1;
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|
count(*)
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|
6
|
|
DELETE FROM t1 WHERE v2 != f1 and f1 < 5;
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
select count(*) from t1;
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|
count(*)
|
|
3
|
|
select * from t1;
|
|
f1 f2 f3 f4 v1 v2
|
|
1 1 1 1 1 1
|
|
1 0 1 1 0 NULL
|
|
6 6 0 0 1 1
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
INSERT INTO t1 ( f1, f2, f3, f4 ) SELECT v1, v2, 10,10 FROM t1;
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|
ERROR 23000: Column 'f2' cannot be null
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|
INSERT INTO t1 ( f1, f2, f3, f4 ) SELECT v1, v2, 10,10 FROM t1 where f2 !=0;
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|
Warnings:
|
|
Warning 1365 Division by 0
|
|
UPDATE t1 SET f3 = v1 WHERE f2 = 2 AND v2 is null;
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
SELECT * FROM t1;
|
|
f1 f2 f3 f4 v1 v2
|
|
1 1 1 1 1 1
|
|
1 0 1 1 0 NULL
|
|
6 6 0 0 1 1
|
|
1 1 10 10 1 1
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|
1 1 10 10 1 1
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
TRUNCATE TABLE t1;
|
|
set sql_mode='error_for_division_by_zero';
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (0, 0, 0, 0);
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (1, 1, 1, 1);
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (1, 0, 1, 1);
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (0, 1, 1, 1);
|
|
select v1 from t1;
|
|
v1
|
|
NULL
|
|
1
|
|
0
|
|
NULL
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (0,0,0,0), (2,2,2,2);
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (3,3,3,3), (4,4,4,4);
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (5,5,5,5), (1,0,0,0);
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
INSERT INTO t1 (f1, f2, f3, f4) VALUES (6,6,0,0);
|
|
INSERT INTO t1 ( f1, f2, f3, f4 ) SELECT f3, f4, f3, f4 FROM t1;
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
select count(*) from t1;
|
|
count(*)
|
|
22
|
|
DELETE FROM t1 WHERE v2 != f1 and f1 < 5;
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
select count(*) from t1;
|
|
count(*)
|
|
15
|
|
select * from t1;
|
|
f1 f2 f3 f4 v1 v2
|
|
0 0 0 0 NULL NULL
|
|
1 1 1 1 1 1
|
|
1 0 1 1 0 NULL
|
|
0 0 0 0 NULL NULL
|
|
5 5 5 5 1 1
|
|
1 0 0 0 0 NULL
|
|
6 6 0 0 1 1
|
|
0 0 0 0 NULL NULL
|
|
1 1 1 1 1 1
|
|
1 1 1 1 1 1
|
|
1 1 1 1 1 1
|
|
0 0 0 0 NULL NULL
|
|
5 5 5 5 1 1
|
|
0 0 0 0 NULL NULL
|
|
0 0 0 0 NULL NULL
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
INSERT INTO t1 ( f1, f2, f3, f4 ) SELECT v1, v2, 10,10 FROM t1;
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
Warning 1048 Column 'f2' cannot be null
|
|
Warning 1365 Division by 0
|
|
UPDATE t1 SET f3 = v1 WHERE f2 = 2 AND v2 is null;
|
|
Warnings:
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
Warning 1365 Division by 0
|
|
drop table t1;
|
|
set sql_mode=@@global.sql_mode;
|