function drupal_get_installed_schema_version

7.x install.inc	`drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE)`
6.x install.inc	`drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE)`

Returns the currently installed schema version for a module.

Parameters

$module: A module name.

$reset: Set to TRUE after modifying the system table.

$array: Set to TRUE if you want to get information about all modules in the system.

Return value

The currently installed schema version.

6 calls to drupal_get_installed_schema_version()

drupal_load_updates in drupal-6.x/includes/install.inc: Initialize the update system by loading all installed module's .install files.
system_modules_submit in drupal-6.x/modules/system/system.admin.inc: Submit callback; handles modules form submission.
system_requirements in drupal-6.x/modules/system/system.install: Implementation of hook_requirements().
update_fix_d6_requirements in drupal-6.x/update.php: Perform Drupal 5.x to 6.x updates that are required for update.php to function properly.
update_script_selection_form in drupal-6.x/update.php

... See full list

File

drupal-6.x/includes/install.inc, line 71

Code

function drupal_get_installed_schema_version($module, $reset = FALSE, $array = FALSE) {
  static $versions = array();

  if ($reset) {
    $versions = array();
  }

  if (!$versions) {
    $versions = array();
    $result = db_query("SELECT name, schema_version FROM {system} WHERE type = '%s'", 'module');
    while ($row = db_fetch_object($result)) {
      $versions[$row->name] = $row->schema_version;
    }
  }

  return $array ? $versions : $versions[$module];
}