db_drop_primary_key

Versionen
drupal6 – drupal7	`db_drop_primary_key(&$ret, $table)`

Drop the primary key.

$ret Array to which query results will be added.

$table The table to be altered.

system_update_6001 in modules/system/system.install: Add version id column to {term_node} to allow taxonomy module to use revisions.
system_update_6002 in modules/system/system.install: Increase the maximum length of variable names from 48 to 128.
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_6043 in modules/system/system.install: Update table indices to make them more rational and useful.

includes/database/database.inc, line 2312

<?php
function db_drop_primary_key(&$ret, $table) {
  return Database::getConnection()->schema()->dropPrimaryKey($ret, $table);
}
?>

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