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v4.0
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    v4.0

      LIMIT | Limit Length

      Format, Parameters

      LIMIT keeps the first N rows of data in the data stream, and discard the rest rows.

      Syntax:

      • Format: limit <number>
      • Parameters: see table below
      • Affected columns: data columns produced by previous UQL statements and all their homologous columns
      Name Category Specification Description
      <number> int32 ≥ -1 The rows to be kept, all columns will be kept if it is -1

      Analysis

      find().nodes([1, 5]) as nodes
      n(nodes).e()[:2].n() as path
      limit 2
      return path
      

      In the UQL statement above, LIMIT keeps the first 2 rows of the paths resulting from template query.

      See UQL statement and image below to compare Clause LIMIT and Chain Command Parameter .limit()

      find().nodes([1, 5]) as nodes
      n(nodes).e()[:2].n().limit(2) as path
      return path
      

      Parameter .limit() keeps the first 2 rows of paths resulting from each of the two template queries, and it keeps 4 rows from the result

      Common Usage

      Example: find all cards that transferred money to Card CA029, return 10 cards in a descending order of their balances; that is, to find the 10 cards with the highest balances

      n({_id == "CA029"}).le({@transfer}).n({@card} as n)
      with distinct (n)
      order by n.balance DESC
      return n{*} limit 10
      

      Example: find all cards that transferred money to Card CA029, return them in a descending order of their balances

      n({_id == "CA029"}).le({@transfer}).n({@card} as n)
      with distinct (n)
      limit 10 return n{*}
      order by n.balance DESC
      
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