getPrimaryKey method
Get the primary key from a non spatial db.
Implementation
@override
String? getPrimaryKey(TableName tableName) {
checkOpen();
String sql = "PRAGMA table_info(${tableName.fixedDoubleName})";
var res = select(sql);
var resultRow = res.find("pk", 1);
if (resultRow != null) {
return resultRow.get("name");
}
return null;
}