Monday, 20 September 2021

ArangoDB: AQL: limit number of documents

LIMIT clause is used to limit number of documents.

 

Example

queryToExecute = `FOR doc IN users
    LIMIT 2
    RETURN doc`
127.0.0.1:8529@abc_org> db._query(queryToExecute)
[object ArangoQueryCursor, count: 2, cached: false, hasMore: false]

[ 
  { 
    "_key" : "41688", 
    "_id" : "users/41688", 
    "_rev" : "_cSA6tje--A", 
    "id" : 3, 
    "firstName" : "Madhu", 
    "lastName" : "Thatha" 
  }, 
  { 
    "_key" : "41308", 
    "_id" : "users/41308", 
    "_rev" : "_cSBTpJC---", 
    "country" : "India", 
    "firstName" : "Gopi" 
  } 
]

  Example 2

queryToExecute = `FOR doc IN users
    FILTER doc.age > 32
    LIMIT 3
    RETURN doc`
127.0.0.1:8529@abc_org> queryToExecute = `FOR doc IN users
...>     FILTER doc.age > 32
...>     LIMIT 2
...>     RETURN doc`
FOR doc IN users
    FILTER doc.age > 32
    LIMIT 2
    RETURN doc

127.0.0.1:8529@abc_org> db._query(queryToExecute)
[object ArangoQueryCursor, count: 2, cached: false, hasMore: false]

[ 
  { 
    "_key" : "43460", 
    "_id" : "users/43460", 
    "_rev" : "_cSBlsQe---", 
    "firstName" : "Ram", 
    "lastName" : "Gurram", 
    "age" : 35 
  }, 
  { 
    "_key" : "43468", 
    "_id" : "users/43468", 
    "_rev" : "_cSBl3BW---", 
    "firstName" : "Siva", 
    "lastName" : "Ponnam", 
    "age" : 35 
  } 
]


 

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