apoc.do.case

Procedure

apoc.do.case(conditionals LIST<ANY>, elseQuery STRING, params MAP<STRING, ANY>) - for each pair of conditional queries in the given LIST<ANY>, this procedure will run the first query for which the conditional is evaluated to true. If none of the conditionals are true, the ELSE query will run instead.

Signature

apoc.do.case(conditionals :: LIST<ANY>, elseQuery =  :: STRING, params = {} :: MAP) :: (value :: MAP)

Input parameters

Name	Type	Default
conditionals	LIST<ANY>	null
elseQuery	STRING
params	MAP	{}

Name

Type

Default

conditionals

LIST<ANY>

null

elseQuery

STRING

params

MAP

{}

Output parameters

Name	Type
value	MAP

Name

Type

value

MAP

Usage Examples

The following will create a node with a name property of B, because that’s the first of the conditionals to evaluate to true:

CALL apoc.do.case([
  false,
  'CREATE (a:Node{name:"A"}) RETURN a AS node',
  true,
  'CREATE (b:Node{name:"B"}) RETURN b AS node'
  ],
  'CREATE (c:Node{name:"C"}) RETURN c AS node',{})
YIELD value
RETURN value.node AS node;

Table 1. Results
node
(:Node {name: "B"})

The following will create a node with a name property of C, as per the elseQuery, because all conditionals evaluate to false:

CALL apoc.do.case([
  false,
  'CREATE (a:Node{name:"A"}) RETURN a AS node',
  false,
  'CREATE (b:Node{name:"B"}) RETURN b AS node'
  ],
  'CREATE (c:Node{name:"C"}) RETURN c AS node',{})
YIELD value
RETURN value.node AS node;

Table 2. Results
node
(:Node {name: "C"})