source: sipes/cord/modules/node/node.install @ 8a8efa8

<?php

/**
 * Implementation of hook_schema().
 */
function node_schema() {
  $schema['node'] = array(
    'description' => 'The base table for nodes.',
    'fields' => array(
      'nid' => array(
        'description' => 'The primary identifier for a node.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE),
      'vid' => array(
        'description' => 'The current {node_revisions}.vid version identifier.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0),
      'type' => array(
        'description' => 'The {node_type}.type of this node.',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => ''),
      'language' => array(
        'description' => 'The {languages}.language of this node.',
        'type' => 'varchar',
        'length' => 12,
        'not null' => TRUE,
        'default' => ''),
      'title' => array(
        'description' => 'The title of this node, always treated as non-markup plain text.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''),
      'uid' => array(
        'description' => 'The {users}.uid that owns this node; initially, this is the user that created it.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'status' => array(
        'description' => 'Boolean indicating whether the node is published (visible to non-administrators).',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 1),
      'created' => array(
        'description' => 'The Unix timestamp when the node was created.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'changed' => array(
        'description' => 'The Unix timestamp when the node was most recently saved.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'comment' => array(
        'description' => 'Whether comments are allowed on this node: 0 = no, 1 = read only, 2 = read/write.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'promote' => array(
        'description' => 'Boolean indicating whether the node should be displayed on the front page.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'moderate' => array(
        'description' => 'Previously, a boolean indicating whether the node was "in moderation"; mostly no longer used.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'sticky' => array(
        'description' => 'Boolean indicating whether the node should be displayed at the top of lists in which it appears.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'tnid' => array(
        'description' => 'The translation set id for this node, which equals the node id of the source post in each set.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0),
      'translate' => array(
        'description' => 'A boolean indicating whether this translation page needs to be updated.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      ),
    'indexes' => array(
      'node_changed'        => array('changed'),
      'node_created'        => array('created'),
      'node_moderate'       => array('moderate'),
      'node_promote_status' => array('promote', 'status'),
      'node_status_type'    => array('status', 'type', 'nid'),
      'node_title_type'     => array('title', array('type', 4)),
      'node_type'           => array(array('type', 4)),
      'uid'                 => array('uid'),
      'tnid'                => array('tnid'),
      'translate'           => array('translate'),
      ),
    'unique keys' => array(
      'vid'     => array('vid')
      ),
    'primary key' => array('nid'),
    );

  $schema['node_access'] = array(
    'description' => 'Identifies which realm/grant pairs a user must possess in order to view, update, or delete specific nodes.',
    'fields' => array(
      'nid' => array(
        'description' => 'The {node}.nid this record affects.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0),
      'gid' => array(
        'description' => "The grant ID a user must possess in the specified realm to gain this row's privileges on the node.",
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0),
      'realm' => array(
        'description' => 'The realm in which the user must possess the grant ID. Each node access node can define one or more realms.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''),
      'grant_view' => array(
        'description' => 'Boolean indicating whether a user with the realm/grant pair can view this node.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny'),
      'grant_update' => array(
        'description' => 'Boolean indicating whether a user with the realm/grant pair can edit this node.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny'),
      'grant_delete' => array(
        'description' => 'Boolean indicating whether a user with the realm/grant pair can delete this node.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny')
      ),
    'primary key' => array('nid', 'gid', 'realm'),
    );

  $schema['node_counter'] = array(
    'description' => 'Access statistics for {node}s.',
    'fields' => array(
      'nid' => array(
        'description' => 'The {node}.nid for these statistics.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'totalcount' => array(
        'description' => 'The total number of times the {node} has been viewed.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'big'),
      'daycount' => array(
        'description' => 'The total number of times the {node} has been viewed today.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'size' => 'medium'),
      'timestamp' => array(
        'description' => 'The most recent time the {node} has been viewed.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0)
      ),
    'primary key' => array('nid'),
    );

  $schema['node_revisions'] = array(
    'description' => 'Stores information about each saved version of a {node}.',
    'fields' => array(
      'nid' => array(
        'description' => 'The {node} this version belongs to.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0),
      'vid' => array(
        'description' => 'The primary identifier for this version.',
        'type' => 'serial',
        'unsigned' => TRUE,
        'not null' => TRUE),
      'uid' => array(
        'description' => 'The {users}.uid that created this version.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'title' => array(
        'description' => 'The title of this version.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''),
      'body' => array(
        'description' => 'The body of this version.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big'),
      'teaser' => array(
        'description' => 'The teaser of this version.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big'),
      'log' => array(
        'description' => 'The log entry explaining the changes in this version.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big'),
      'timestamp' => array(
        'description' => 'A Unix timestamp indicating when this version was created.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0),
      'format' => array(
        'description' => "The input format used by this version's body.",
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0)
      ),
    'indexes' => array(
      'nid' => array('nid'),
      'uid' => array('uid')
      ),
    'primary key' => array('vid'),
    );

  $schema['node_type'] = array(
    'description' => 'Stores information about all defined {node} types.',
    'fields' => array(
      'type' => array(
        'description' => 'The machine-readable name of this type.',
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE),
      'name' => array(
        'description' => 'The human-readable name of this type.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''),
      'module' => array(
        'description' => 'The base string used to construct callbacks corresponding to this node type.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE),
      'description'    => array(
        'description' => 'A brief description of this type.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'medium'),
      'help' => array(
        'description' => 'Help information shown to the user when creating a {node} of this type.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'medium'),
      'has_title' => array(
        'description' => 'Boolean indicating whether this type uses the {node}.title field.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'size' => 'tiny'),
      'title_label' => array(
        'description' => 'The label displayed for the title field on the edit form.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''),
      'has_body' => array(
        'description' => 'Boolean indicating whether this type uses the {node_revisions}.body field.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'size' => 'tiny'),
      'body_label' => array(
        'description' => 'The label displayed for the body field on the edit form.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => ''),
      'min_word_count' => array(
        'description' => 'The minimum number of words the body must contain.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'size' => 'small'),
      'custom' => array(
        'description' => 'A boolean indicating whether this type is defined by a module (FALSE) or by a user via a module like the Content Construction Kit (TRUE).',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny'),
      'modified' => array(
        'description' => 'A boolean indicating whether this type has been modified by an administrator; currently not used in any way.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny'),
      'locked' => array(
        'description' => 'A boolean indicating whether the administrator can change the machine name of this type.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny'),
      'orig_type' => array(
        'description' => 'The original machine-readable name of this node type. This may be different from the current type name if the locked field is 0.',
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '')
      ),
    'primary key' => array('type'),
    );

  return $schema;
}