Statements (DDL and DML)

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Optimizer does not use HIGH2KEY/LOW2KEY for columns with COLCARD 1

Optimization issue if a business_time_oriented table has only one row. In syscat.columns the content of the business_time columns are detected (high2key, low2key) but the value can not be found in the distribution statistics. This leads default fi...

11 days ago in Db2 / Statements (DDL and DML) 0 Submitted

7 VOTE

db2expln stopped working from db2v11.5.7.0 onward on HADR STANDBY

db2expln, doesn't write / update and tables on the database and it was working till db2 v11.5.5 on STANDBY RO enabled, from v11.5.7.0 it stopped working, many time there is a need to check explain out on STANDBY RO enabled

11 days ago in Db2 / Statements (DDL and DML) 0 Submitted

2 VOTE

Bufferpool and tablespace creation authority to DBADM

Create of a tablespace and bufferpool requires SYS* authorities. It made sense in earlier days when SYS folks needed to create filesystem, mount point etc. With automatic storage enabled database, it makes a perfect sense to delegate these authori...

2 months ago in Db2 / Statements (DDL and DML) 0 Future consideration

3 VOTE

Add generated always for each row on update as row change SESSION_USER

Currently exists in Db2 to change current timestamp on INSERT and UPDATE with generated statement like: create table myschema.mytable (id int, last_timestamp timestamp not null generated always for each row on update as row change timestamp) inser...

6 months ago in Db2 / Statements (DDL and DML) 0 Submitted

3 VOTE

Add ALTER COLUMN options to modify numeric column length and allow rename column names for ((bi)temporal) column organized tables

Db2’s capabilities to perform schema changes on any form of ((bi)temporal) column organized tables lacks behind it’s row organized counterparts. This prevents effective database schema evolution and therefore limits the use of column organized tab...

6 months ago in Db2 / Statements (DDL and DML) 0 Submitted

2 VOTE

In error message display actual table's column name that is violating NOT NULL definition instead of outputing "TBSPACEID=2, TABLEID=5, COLNO=0"

I am constantly running into this problem when inserting null values into not null table column. Getting out tablespaceid, tableid and colno is time consuming and annoying to constantly check the column name that is defined not null, but null valu...

7 months ago in Db2 / Statements (DDL and DML) 0 Not under consideration

1 VOTE

Add varchar(max) and nvarchar(max)

We are frequently moving data between MS-SQL server and Db2. When data are moved from Db2 to MS-SQL there are no issues. But when data are moved from MS-SQL to DB2 we have frequent problems with varchar and nvarchar data types for data types where...

7 months ago in Db2 / Statements (DDL and DML) 0 Not under consideration

3 VOTE

Add support for INFORMATION_SCHEMA views

In our company we are using PostgreSQL, SQL Server, MySQL and DB2. All of database except Db2 support INFORMATION_SCHEMA views. There is pretty easy to write at least basic cross-database SQL to get info from database catalog tables except in Db2....

7 months ago in Db2 / Statements (DDL and DML) 0 Not under consideration

1 VOTE

The change 'Primary Key Name' is added!

Currently, I know that there is no function to change only the 'Primary Key Name' of Db2. Especially in the case of Primary Key, Unique Index is also created when it is generated! Since the primary key name cannot be duplicated, there is a problem...

10 months ago in Db2 / Statements (DDL and DML) 0 Future consideration

2 VOTE

Automated Re-creation of Select-Star Views

If a view is created by using a 'SELECT *' statement, the view is not updated when a new column is added to the base table. An example: create table dm_tab(N integer, M integer) organize by row; insert into dm_tab(N, M) values (1, 2); create view ...

about 1 year ago in Db2 / Statements (DDL and DML) 0 Future consideration

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