function db_drop_primary_key

Drops the primary key of a database table.

Parameters

$table: Name of the table to be altered.

Related topics

Schema API: API to handle database schemas.

7 calls to db_drop_primary_key()

field_sql_storage_update_7001 in drupal/modules/field/modules/field_sql_storage/field_sql_storage.install: Remove the field_config_entity_type table and store 'entity_type' strings.
field_sql_storage_update_7002 in drupal/modules/field/modules/field_sql_storage/field_sql_storage.install: Fix primary keys in field revision data tables.
node_update_7016 in drupal/modules/node/node.install: Change {history}.nid to an unsigned int in order to match {node}.nid.
system_update_7065 in drupal/modules/system/system.install: Remove the default value for sid.
trigger_update_7000 in drupal/modules/trigger/trigger.install: Alter the "hook" field and drop the "op field" of {trigger_assignments}.

... See full list

File

drupal/includes/database/database.inc, line 2959: Core systems for the database layer.

Code

function db_drop_primary_key($table) {
  return Database::getConnection()
    ->schema()
    ->dropPrimaryKey($table);
}