DefaultRelDepth return a hint about DefaultRelDepth.

ForceIndex return a hint about ForceIndex.

ForUpdate return a hint about ForUpdate.

IgnoreIndex return a hint about IgnoreIndex.

Limit return a hint about Limit.

NewHint return a hint.

Offset return a hint about Offset.

OrderBy return a hint about OrderBy.

RelDepth return a hint about RelDepth.

UseIndex return a hint about UseIndex.

query level.