Db2 drop index if exists. Other than changing the COMPRESSION attribute of an index, you cannot change any clause of an index definition; you must drop the index and create it again. You are correct that DB2 prohibits DDL within an atomic SQL block. Despite the fact that currently there are several similar answers none of them worked for me. Example 1: SQL DROP INDEX with IF EXISTS Dropping an index does not cause Db2 to drop any other objects. PACKAGE collection-id. If you include the optional IF EXISTS keywords, the database server takes no action (rather than sending an exception to the application) if no index of the specified name is registered in the current database. DB2 - SQL DROP Statement The DROP statement removes an object in the current server. ) Now we do not know if this thing exists or not. Drop index will result in the deletion of rows in the SYSCOLDIST and SYSCOLDISTATS catalog tables if no other indexes on the table have the same column group in their key sequence prefix. Nov 11, 2009 · DB2: Hi I am trying to run a SQL sentence using a batch job (JCL is successful). Modification state indexes (also known as mod state indexes) can be dropped, even though they are classified as system indexes. I expect this has to do with the optimizer attempting to validate/prepare the statement - you can only specify them for column contents, after all. The name must identify a column mask that exists at the current server. The IF EXISTS clause of the DROP INDEX statement is used to drop an index only if it already exists in the database. 3 and 7. IBM has released a free add-on procedure called db2perf_quiet_drop that works the way you want. Parent topic: The DROP INDEX statement in IBM Informix servers is used to remove an index from the database, extending the ANSI/ISO SQL standard. For example, if you drop a table, any aliases, constraints, triggers, views, or indexes associated with that table are also dropped. The DROP DATABASE statement is used to drop an existing Storage group, Database, Tablespace, Table, Index, View, Alias, Synonym. The SQL sentence is introduced in a file. Jul 23, 2025 · We can drop the index using two ways either with IF EXISTS or with ALTER TABLE so we will first drop the index using if exists. All packages depending on any object dropped or marked inoperative are invalidated. Whenever an object is deleted, its description is deleted from the catalog. Dropping an index does not cause any other objects to be dropped but might cause some packages to be invalidated. If you delete a non-existing index, Db2 will issue an error. Tablespace: Dec 21, 2011 · You'll need an clause to check for the existence of the table and then a separate statement to actually drop it if it does exist. Dropping modification state indexes is supported in order to facilitate rollback to an earlier fix pack level. All views and triggers that reference the table are made inoperative. DB2 Drop table if exists equivalent Sug. package-name Aug 17, 2018 · In SQL we often want to create or drop an object (TABLE, VIEW, SEQUENCE, INDEX, SYNONYM, DATABASE, USER, SCHEMA,…. All indexes, primary keys, foreign keys, and check constraints referencing the table are dropped. MASK mask-name Identifies the column mask to drop. 1Index-name can be the name of either an index or an index specification. 2 For compatibility with Netezza, you can change the order of IF EXISTS and table-name. In this syntax, you specify the name of the index that you want to delete after the DROP INDEX keyword. Apr 25, 2017 · My goal is pretty straightforward - if table has rows, drop it. 4 releases on November 13, 2020 by applying the latest Db2 PTF Group. Dec 20, 2011 · DROP INDEX, like most of SQL, doesn't accept parameters for identifiers (you can't do this with SELECT statements either). Unfortunately, Db2 doesn’t support IF EXISTS option that conditionally deletes an index only if the index exists. The consequence of dropping indexes is that Db2 invalidates packages that use the index and automatically rebinds them when they are next used. Dropping materialized query or staging tables You cannot alter a materialized query or staging table, but you can drop it. Database: Whenever a database is dropped, all of its tablespaces, tables, index spaces, and indexes are also dropped. Nov 12, 2020 · The new IF EXISTS clause for the SQL DROP statement will be available for the IBM i 7. jqfqqh wtzcd q5ins htzv 3iah mbt uvfrjw yue oqhe2 vyoi1v