[
	{
		"name": "wbc_entity_usage",
		"columns": [
			{
				"name": "eu_row_id",
				"type": "bigint",
				"options": { "notnull": true, "autoincrement": true }
			},
			{
				"name": "eu_entity_id",
				"comment": "The ID of the entity being used",
				"type": "binary",
				"options": { "length": 255, "notnull": true }
			},
			{
				"name": "eu_aspect",
				"comment": "The aspect of the entity. See EntityUsage::XXX_USAGE for possible values.",
				"type": "binary",
				"options": { "length": 37, "notnull": true }
			},
			{
				"name": "eu_page_id",
				"type": "integer",
				"comment": "The ID of the page that uses the entities.",
				"options": { "notnull": true }
			}
		],
		"indexes": [
			{
				"name": "eu_entity_id",
				"comment": "Record one usage per page per aspect of an entity",
				"columns": [ "eu_entity_id", "eu_aspect", "eu_page_id" ],
				"unique": true
			},
			{
				"name": "eu_page_id",
				"comment": "Look up (and especially, delete) usage entries by page id",
				"columns": [ "eu_page_id", "eu_entity_id" ],
				"unique": false
			}
		],
		"pk": [ "eu_row_id" ]
	}
]