For example, consider a query: where "A && (B || C)" As the kernel parses the query, the expression passed to the database becomes: (A && B) || (A && C) The kernel uses ORs at the top level to separate the query into parts, then to accumulate the results. Generally, the processing of a query is done left to right. Knowing this, a user can structure queries so that the indexed attributes are used first. Front loading the query in this manner restricts the sets of objects searched with non-indexed attributes. | |||||||