apoc.meta.schema

Procedure APOC Core

apoc.meta.schema({config}) - examines a subset of the graph to provide a map-like meta information

Signature

apoc.meta.schema(config = {} :: MAP?) :: (value :: MAP?)

Input parameters

Name Type Default

config

MAP?

{}

Output parameters

Name Type

value

MAP?

Usage Examples

The examples in this section are based on the following sample graph:

CREATE (Keanu:Person {name:'Keanu Reeves', born:1964})
CREATE (TomH:Person {name:'Tom Hanks', born:1956})

CREATE (TheMatrix:Movie {title:'The Matrix', released:1999, tagline:'Welcome to the Real World'})
CREATE (TheMatrixReloaded:Movie {title:'The Matrix Reloaded', released:2003, tagline:'Free your mind'})
CREATE (TheMatrixRevolutions:Movie {title:'The Matrix Revolutions', released:2003, tagline:'Everything that has a beginning has an end'})
CREATE (SomethingsGottaGive:Movie {title:"Something's Gotta Give", released:2003})
CREATE (TheDevilsAdvocate:Movie {title:"The Devil's Advocate", released:1997, tagline:'Evil has its winning ways'})

CREATE (YouveGotMail:Movie {title:"You've Got Mail", released:1998, tagline:'At odds in life... in love on-line.'})
CREATE (SleeplessInSeattle:Movie {title:'Sleepless in Seattle', released:1993, tagline:'What if someone you never met, someone you never saw, someone you never knew was the only someone for you?'})
CREATE (ThatThingYouDo:Movie {title:'That Thing You Do', released:1996, tagline:'In every life there comes a time when that thing you dream becomes that thing you do'})
CREATE (CloudAtlas:Movie {title:'Cloud Atlas', released:2012, tagline:'Everything is connected'})

CREATE (Keanu)-[:ACTED_IN {roles:['Neo']}]->(TheMatrix)
CREATE (Keanu)-[:ACTED_IN {roles:['Neo']}]->(TheMatrixReloaded)
CREATE (Keanu)-[:ACTED_IN {roles:['Neo']}]->(TheMatrixRevolutions)
CREATE (Keanu)-[:ACTED_IN {roles:['Julian Mercer']}]->(SomethingsGottaGive)
CREATE (Keanu)-[:ACTED_IN {roles:['Kevin Lomax']}]->(TheDevilsAdvocate)

CREATE (TomH)-[:ACTED_IN {roles:['Joe Fox']}]->(YouveGotMail)
CREATE (TomH)-[:ACTED_IN {roles:['Sam Baldwin']}]->(SleeplessInSeattle)
CREATE (TomH)-[:ACTED_IN {roles:['Mr. White']}]->(ThatThingYouDo)
CREATE (TomH)-[:ACTED_IN {roles:['Zachry', 'Dr. Henry Goose', 'Isaac Sachs', 'Dermot Hoggins']}]->(CloudAtlas);
CALL apoc.meta.schema()
YIELD value
UNWIND keys(value) AS key
RETURN key, value[key] AS value;
Table 1. Results
key value

"Movie"

{count: 9, relationships: {ACTED_IN: {count: 41, properties: {roles: {existence: FALSE, type: "LIST", array: TRUE}}, direction: "in", labels: ["Person"]}}, type: "node", properties: {tagline: {existence: FALSE, type: "STRING", indexed: FALSE, unique: FALSE}, title: {existence: FALSE, type: "STRING", indexed: FALSE, unique: FALSE}, released: {existence: FALSE, type: "INTEGER", indexed: FALSE, unique: FALSE}}, labels: []}

"ACTED_IN"

{count: 9, type: "relationship", properties: {roles: {existence: FALSE, type: "LIST", array: TRUE}}}

"Person"

{count: 2, relationships: {ACTED_IN: {count: 9, properties: {roles: {existence: FALSE, type: "LIST", array: TRUE}}, direction: "out", labels: ["Movie"]}}, type: "node", properties: {name: {existence: FALSE, type: "STRING", indexed: FALSE, unique: FALSE}, born: {existence: FALSE, type: "INTEGER", indexed: FALSE, unique: FALSE}}, labels: []}