LIMIT
The LIMIT
statement allows slicing the result array using an
offset and a count. It reduces the number of elements in the result to at most
the specified number.
Syntax
Two general forms of LIMIT
are:
LIMIT count
LIMIT offset, count
The first form allows specifying only the count value whereas the second form allows specifying both offset and count. The first form is identical using the second form with an offset value of 0.
Usage
FOR u IN users
LIMIT 5
RETURN u
Above query returns the first five documents of the users collection.
It could also be written as LIMIT 0, 5
for the same result.
Which documents it actually returns is rather arbitrary, because no explicit
sorting order is specified however. Therefore, a limit should be usually
accompanied by a SORT
operation.
The offset value specifies how many elements from the result shall be skipped. It must be 0 or greater. The count value specifies how many elements should be at most included in the result.
FOR u IN users
SORT u.firstName, u.lastName, u.id DESC
LIMIT 2, 5
RETURN u
In above example, the documents of users are sorted, the first two results get skipped and it returns the next five user documents.
Variables, expressions and subqueries can not be used for offset and count. The values for offset and count must be known at query compile time, which means that you can only use number literals, bind parameters or expressions that can be resolved at query compile time.
Where a LIMIT
is used in relation to other operations in a query has meaning.
LIMIT
operations before FILTER
s in particular can change the result
significantly, because the operations are executed in the order in which they
are written in the query. See FILTER
for a detailed example.