Statements (DDL and DML)

Showing 92

Make multiple DDL changes transactional

Why is it useful? When complex changes are made in DDL and one of the changes fails, it can get pretty hard to revert the issue. Who would benefit from it? Implementing this idea would tremendously help database administrators. How should it work?...

about 1 month ago in Db2 / Statements (DDL and DML) 0 Submitted

8 VOTE

Db2 partitioned table, set range of partitions to read only or read write mode

Table data is partitioned as specified in the PARTITION BY clause of the CREATE TABLE statement.At this moment if we create partitioned table, we can only set whole table to read only access using SET INTEGRITY FOR table OFF READ ACCESSor let it b...

about 2 months ago in Db2 / Statements (DDL and DML) 0 Submitted

15 VOTE

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...

6 months ago in Db2 / Statements (DDL and DML) 1 Future consideration

8 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

6 months ago in Db2 / High Availability and/or Disaster Recovery / Statements (DDL and DML) 6 Functionality already exists

4 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...

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

5 VOTE

Enhance ALTER STOGROUP DROP ‚storage-path’ with optional specification of the Path_ID

As you may ADD the same path multiple times to a storage group (in order to have multiple containers of a single tablespace within that path), it should be possible to even DROP a single reference to that path from the storage group as well! But s...

10 months ago in Db2 / Statements (DDL and DML) 0 Not under 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...

11 months ago in Db2 / Statements (DDL and DML) 1 Future consideration

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...

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

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...

about 1 year 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...

about 1 year ago in Db2 / Statements (DDL and DML) 0 Not under consideration

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