Same name in this branch
  1. 6.x includes/database.pgsql.inc \db_drop_index()
  2. 6.x includes/database.mysql-common.inc \db_drop_index()
Same name and namespace in other branches
  1. 7.x includes/database/database.inc \db_drop_index()
  2. 8.9.x core/includes/database.inc \db_drop_index()

Drop an index.

Parameters

$ret: Array to which query results will be added.

$table: The table to be altered.

$name: The name of the index.

Related topics

Schema API
A Drupal schema definition is an array structure representing one or more tables and their related keys and indexes. A schema is defined by hook_schema(), which usually lives in a modulename.install file.
9 calls to db_drop_index()
system_update_6019 in modules/system/system.install
Reconcile small differences in the previous, manually created mysql and pgsql schemas so they are the same and can be represented by a single schema structure.
system_update_6022 in modules/system/system.install
Update files tables to associate files to a uid by default instead of a nid. Rename file_revisions to upload since it should only be used by the upload module used by upload to link files to nodes.
system_update_6023 in modules/system/system.install
system_update_6025 in modules/system/system.install
Increase the maximum length of node titles from 128 to 255.
system_update_6035 in modules/system/system.install
Change index on system table for better performance.

... See full list

File

includes/database.pgsql.inc, line 827
Database interface code for PostgreSQL database servers.

Code

function db_drop_index(&$ret, $table, $name) {
  $name = '{' . $table . '}_' . $name . '_idx';
  $ret[] = update_sql('DROP INDEX ' . $name);
}