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22 kwi 2010 · For SQL 2008 and newer, a more concise method, coding-wise, to detect index existence is by using the INDEXPROPERTY built-in function: INDEXPROPERTY ( object_ID , index_or_statistics_name , property ) The simplest usage is with the IndexID property: If IndexProperty (Object_Id ('MyTable'), 'MyIndex', 'IndexID') Is Null.
Here is a workaround for the DROP INDEX IF EXISTS, that is missing in MySQL and MariaDB versions before v10.1.4. You can also use it for every other statement you want, that should be depend on the existence of an INDEX (e.g. for SELECT "info: index exists." like in the example below).
17 sty 2023 · As a workaround, I wrote the following Procedure, which works for me. CREATE PROCEDURE `DropIndexIfExists`(. IN i_table_name VARCHAR(128), IN i_index_name VARCHAR(128) ) BEGIN. SET @tableName = i_table_name; SET @indexName = i_index_name; SET @indexExists = 0;
13 sie 2012 · The DROP_EXISTING clause enhances performance when re-creating a clustered index (with either the same or a different set of keys) on a table that also has nonclustered indexes.
22 sie 2016 · Create new database object. The new DROP IF EXISTS syntax replaces the old block of code that used system catalog views to determine the existence of an object. Basically, the new syntax combines steps one and two into a smaller set of code to produce the same results.
15.1.27 DROP INDEX Statement. DROP INDEX drops the index named index_name from the table tbl_name. This statement is mapped to an ALTER TABLE statement to drop the index. See Section 15.1.9, “ALTER TABLE Statement”. To drop a primary key, the index name is always PRIMARY, which must be specified as a quoted identifier because PRIMARY is a ...
The DROP INDEX command is used to delete an index in a table. MS Access: DROP INDEX index_name ON table_name; SQL Server: DROP INDEX table_name.index_name; DB2/Oracle: DROP INDEX index_name; MySQL: ALTER TABLE table_name.
