{
	"comment": "Rename page_timestamp index to have 'rev_' prefix (T270033)",
	"before": {
		"name": "revision",
		"comment": "Every edit of a page creates also a revision row. This stores metadata about the revision, and a reference to the text storage backend.",
		"columns": [
			{
				"name": "rev_id",
				"comment": "Unique ID to identify each revision",
				"type": "integer",
				"options": { "unsigned": true, "notnull": true, "autoincrement": true }
			},
			{
				"name": "rev_page",
				"comment": "Key to page_id. This should never be invalid",
				"type": "integer",
				"options": { "unsigned": true, "notnull": true }
			},
			{
				"name": "rev_comment_id",
				"comment": "Key to comment.comment_id. Comment summarizing the change",
				"type": "bigint",
				"options": { "unsigned": true, "notnull": true, "default": 0 }
			},
			{
				"name": "rev_actor",
				"comment": "Key to actor.actor_id of the user or IP who made this edit",
				"type": "bigint",
				"options": { "unsigned": true, "notnull": true, "default": 0 }
			},
			{
				"name": "rev_timestamp",
				"comment": "Timestamp of when revision was created",
				"type": "mwtimestamp",
				"options": { "notnull": true, "default": "" }
			},
			{
				"name": "rev_minor_edit",
				"comment": "Records whether the user marked the 'minor edit' checkbox. Many automated edits are marked as minor",
				"type": "mwtinyint",
				"options": { "notnull": true, "unsigned": true, "default": 0 }
			},
			{
				"name": "rev_deleted",
				"comment": "Restrictions on who can access this revision",
				"type": "mwtinyint",
				"options": { "notnull": true, "unsigned": true, "default": 0 }
			},
			{
				"name": "rev_len",
				"comment": "Length of this revision in bytes",
				"type": "integer",
				"options": { "unsigned": true, "notnull": false }
			},
			{
				"name": "rev_parent_id",
				"comment": "Key to revision.rev_id. This field is used to add support for a tree structure (The Adjacency List Model)",
				"type": "integer",
				"options": { "unsigned": true, "notnull": false }
			},
			{
				"name": "rev_sha1",
				"comment": "SHA-1 text content hash in base-36",
				"type": "binary",
				"options": { "length": 32, "notnull": true, "default": "" }
			}
		],
		"indexes": [
			{
				"name": "rev_page_id",
				"columns": [ "rev_page", "rev_id" ],
				"comment": "The index is proposed for removal, do not use it in new code: T163532. Used for ordering revisions within a page by rev_id, which is usually incorrect, since rev_timestamp is normally the correct order. It can also be used by dumpBackup.php, if a page and rev_id range is specified.",
				"unique": false
			},
			{
				"name": "rev_timestamp",
				"columns": [ "rev_timestamp" ],
				"comment": "Used by ApiQueryAllRevisions",
				"unique": false
			},
			{
				"name": "page_timestamp",
				"columns": [ "rev_page", "rev_timestamp" ],
				"comment": "History index",
				"unique": false
			},
			{
				"name": "rev_actor_timestamp",
				"columns": [ "rev_actor", "rev_timestamp", "rev_id" ],
				"comment": "User contributions index",
				"unique": false
			},
			{
				"name": "rev_page_actor_timestamp",
				"columns": [ "rev_page", "rev_actor", "rev_timestamp" ],
				"comment": "Credits index. This is scanned in order to compile credits lists for pages, in ApiQueryContributors. Also for ApiQueryRevisions if rvuser is specified",
				"unique": false
			}
		],
		"table_options": [ "/*$wgDBTableOptions*/", "MAX_ROWS=10000000", "AVG_ROW_LENGTH=1024" ],
		"pk": [ "rev_id" ]
	},
	"after": {
		"name": "revision",
		"comment": "Every edit of a page creates also a revision row. This stores metadata about the revision, and a reference to the text storage backend.",
		"columns": [
			{
				"name": "rev_id",
				"comment": "Unique ID to identify each revision",
				"type": "integer",
				"options": { "unsigned": true, "notnull": true, "autoincrement": true }
			},
			{
				"name": "rev_page",
				"comment": "Key to page_id. This should never be invalid",
				"type": "integer",
				"options": { "unsigned": true, "notnull": true }
			},
			{
				"name": "rev_comment_id",
				"comment": "Key to comment.comment_id. Comment summarizing the change",
				"type": "bigint",
				"options": { "unsigned": true, "notnull": true, "default": 0 }
			},
			{
				"name": "rev_actor",
				"comment": "Key to actor.actor_id of the user or IP who made this edit",
				"type": "bigint",
				"options": { "unsigned": true, "notnull": true, "default": 0 }
			},
			{
				"name": "rev_timestamp",
				"comment": "Timestamp of when revision was created",
				"type": "mwtimestamp",
				"options": { "notnull": true, "default": "" }
			},
			{
				"name": "rev_minor_edit",
				"comment": "Records whether the user marked the 'minor edit' checkbox. Many automated edits are marked as minor",
				"type": "mwtinyint",
				"options": { "notnull": true, "unsigned": true, "default": 0 }
			},
			{
				"name": "rev_deleted",
				"comment": "Restrictions on who can access this revision",
				"type": "mwtinyint",
				"options": { "notnull": true, "unsigned": true, "default": 0 }
			},
			{
				"name": "rev_len",
				"comment": "Length of this revision in bytes",
				"type": "integer",
				"options": { "unsigned": true, "notnull": false }
			},
			{
				"name": "rev_parent_id",
				"comment": "Key to revision.rev_id. This field is used to add support for a tree structure (The Adjacency List Model)",
				"type": "integer",
				"options": { "unsigned": true, "notnull": false }
			},
			{
				"name": "rev_sha1",
				"comment": "SHA-1 text content hash in base-36",
				"type": "binary",
				"options": { "length": 32, "notnull": true, "default": "" }
			}
		],
		"indexes": [
			{
				"name": "rev_page_id",
				"columns": [ "rev_page", "rev_id" ],
				"comment": "The index is proposed for removal, do not use it in new code: T163532. Used for ordering revisions within a page by rev_id, which is usually incorrect, since rev_timestamp is normally the correct order. It can also be used by dumpBackup.php, if a page and rev_id range is specified.",
				"unique": false
			},
			{
				"name": "rev_timestamp",
				"columns": [ "rev_timestamp" ],
				"comment": "Used by ApiQueryAllRevisions",
				"unique": false
			},
			{
				"name": "rev_page_timestamp",
				"columns": [ "rev_page", "rev_timestamp" ],
				"comment": "History index",
				"unique": false
			},
			{
				"name": "rev_actor_timestamp",
				"columns": [ "rev_actor", "rev_timestamp", "rev_id" ],
				"comment": "User contributions index",
				"unique": false
			},
			{
				"name": "rev_page_actor_timestamp",
				"columns": [ "rev_page", "rev_actor", "rev_timestamp" ],
				"comment": "Credits index. This is scanned in order to compile credits lists for pages, in ApiQueryContributors. Also for ApiQueryRevisions if rvuser is specified",
				"unique": false
			}
		],
		"table_options": [ "/*$wgDBTableOptions*/", "MAX_ROWS=10000000", "AVG_ROW_LENGTH=1024" ],
		"pk": [ "rev_id" ]
	}
}