Query

Identifies a component boundary. join is applied to the current cursor and child yielding a continuation query which will be evaluated by the interpreter identified by componentId.

A deferred query. join is applied to the current cursor and child yielding a continuation query which will be evaluated by the current interpreter in its next stage.

The terminal query

Add env to the environment for the continuation child

Retains only elements satisfying pred and continues with child

Extractor for nested Filter/OrderBy/Limit patterns in the query algebra

A Group of sibling queries at the same level

A Group of sibling queries as a list

Evaluates an introspection query relative to schema

Limits the results of list-producing continuation child to num elements

The result of child if the focus is of type subtpe, Empty otherwise.

Orders the results of list-producing continuation child by fields specified by selections.

Extractor for nested Rename/Select patterns in the query algebra

Rename the topmost field of sel to name.

Select field name given arguments args and continue with child

Skips/includes the continuation child depending on the value of cond

A placeholder for a skipped node

Continues with single-element-list-producing child and yields the single element

Untyped precursor of Narrow.

Trees of this type will be replaced by a corresponding Narrow by SelectElaborator.

Wraps the result of child as a field named name of an enclosing object.

The names of the product elements

The name of the type

Merge the given queries as a single query

Construct a query which yields all the supplied paths