The Ultimate Guide to High Availability with MariaDB

DROP INDEX

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Syntax

DROP [ONLINE|OFFLINE] INDEX index_name ON tbl_name [algorithm_option | lock_option]

algorithm_option:
    ALGORITHM [=] {DEFAULT|INPLACE|COPY}

lock_option:
    LOCK [=] {DEFAULT|NONE|SHARED|EXCLUSIVE}

Description

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.

If another connection is using the table, a metadata lock is active, and this statement will wait until the lock is released. This is also true for non-transactional tables.

See ALTER TABLE.

Another shortcut, CREATE INDEX, allows the creation of an index.

The ONLINE and OFFLINE clauses have been removed in MariaDB 10.0.

To remove the primary key, `PRIMARY` must be specified as index_name. Note that the quotes are necessary, because PRIMARY is a keyword.

Since MariaDB 5.3 this statement supports progress reporting.

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