public function DatabaseCacheTagsChecksum::schemaDefinition in Drupal 8

Same name and namespace in other branches

1. 9 core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php \Drupal\Core\Cache\DatabaseCacheTagsChecksum::schemaDefinition()

Defines the schema for the {cachetags} table.

@internal

1 call to DatabaseCacheTagsChecksum::schemaDefinition()

DatabaseCacheTagsChecksum::ensureTableExists in core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php

Check if the cache tags table exists and create it if not.

File

core/lib/Drupal/Core/Cache/DatabaseCacheTagsChecksum.php, line 100

Class

DatabaseCacheTagsChecksum

Cache tags invalidations checksum implementation that uses the database.

Namespace

Drupal\Core\Cache

Code

public function schemaDefinition() {
  $schema = [
    'description' => 'Cache table for tracking cache tag invalidations.',
    'fields' => [
      'tag' => [
        'description' => 'Namespace-prefixed tag string.',
        'type' => 'varchar_ascii',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
      ],
      'invalidations' => [
        'description' => 'Number incremented when the tag is invalidated.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ],
    ],
    'primary key' => [
      'tag',
    ],
  ];
  return $schema;
}