Same rules apply when you search inside objects and branchy structures.

Type checking operators and "every" placeholders are useful for document

schema validation. JsQuerymatchig operator`@@` is immutable and can be used

schema validation. JsQuerymatching operator`@@` is immutable and can be used

in CHECK constraint. See following example.

Unfortunately, jsonb have no statistics yet. That's why JsQuery optimizer has

to do imperative decision while selecting conditions to be evaluated using

index. This decision is made byassumtion that some condition types are less

index. This decision is made byassumption that some condition types are less

selective than others. Optimizer divides conditions into following selectivity

class (listed by descending of selectivity).