{
	"comment": "Convert unique index to primary key (T312255)",
	"before": {
		"name": "wb_id_counters",
		"comment": "Unique ID generator.",
		"columns": [
			{
				"name": "id_value",
				"type": "integer",
				"options": { "unsigned": true, "notnull": true }
			},
			{
				"name": "id_type",
				"type": "binary",
				"options": { "length": 32, "notnull": true }
			}
		],
		"indexes": [
			{ "name": "wb_id_counters_type", "columns": [ "id_type" ], "unique": true }
		],
		"pk": []
	},
	"after": {
		"name": "wb_id_counters",
		"comment": "Unique ID generator.",
		"columns": [
			{
				"name": "id_value",
				"type": "integer",
				"options": { "unsigned": true, "notnull": true }
			},
			{
				"name": "id_type",
				"type": "binary",
				"options": { "length": 32, "notnull": true }
			}
		],
		"indexes": [],
		"pk": [ "id_type" ]
	}
}