<?php

/**
 * @file
 * Update hooks and schema definition for the update_test_schema module.
 */

/**
 * Implements hook_schema().
 *
 * The schema defined here will vary on state to allow for update hook testing.
 */
function update_test_schema_schema() {
  $schema_version = \Drupal::state()->get('update_test_schema_version', 8000);
  $table = [
    'fields' => [
      'a' => ['type' => 'int', 'not null' => TRUE],
      'b' => ['type' => 'blob', 'not null' => FALSE],
    ],
  ];
  switch ($schema_version) {
    case 8001:
      // Add the index.
      $table['indexes']['test'] = ['a'];
      break;
  }
  return ['update_test_schema_table' => $table];
}

// Update hooks are defined depending on state as well.
$schema_version = \Drupal::state()->get('update_test_schema_version', 8000);

if ($schema_version >= 8001) {

  /**
   * Schema version 8001.
   */
  function update_test_schema_update_8001() {
    $table = [
      'fields' => [
        'a' => ['type' => 'int', 'not null' => TRUE],
        'b' => ['type' => 'blob', 'not null' => FALSE],
      ],
    ];

    // Add a column.
    db_add_index('update_test_schema_table', 'test', ['a'], $table);
  }

}