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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
LOAD 'age';
SET search_path TO ag_catalog;
SELECT create_graph('map_proj');
NOTICE: graph "map_proj" has been created
create_graph
--------------
(1 row)
SELECT * FROM cypher('map_proj',
$$
CREATE
(tom:Actor {name:'Tom Hanks', age:60}),
(bale:Actor {name:'Christian Bale', age:50}),
(tom)-[:ACTED_IN {during: 1990}]->(:Movie {title:'Forrest Gump'}),
(tom)-[:ACTED_IN {during: 1995}]->(:Movie {title:'Finch'}),
(tom)-[:ACTED_IN {during: 1999}]->(:Movie {title:'The Circle'}),
(bale)-[:ACTED_IN {during: 2002}]->(:Movie {title:'The Prestige'}),
(bale)-[:ACTED_IN {during: 2008}]->(:Movie {title:'The Dark Knight'})
$$) as (a agtype);
a
---
(0 rows)
-- all property selection
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { .* } $$) as (a agtype);
a
----------------------------
{"age": 50, "name": "Bob"}
(1 row)
-- property selector
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { .name } $$) as (a agtype);
a
-----------------
{"name": "Bob"}
(1 row)
-- literal entry
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { name:'Tom' } $$) as (a agtype);
a
-----------------
{"name": "Tom"}
(1 row)
-- variable selector
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map, 'Tom' as name RETURN map { name } $$) as (a agtype);
a
-----------------
{"name": "Tom"}
(1 row)
-- duplicate all property selector
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { .*, .* } $$) as (a agtype);
a
----------------------------
{"age": 50, "name": "Bob"}
(1 row)
-- name being selected twice
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { .name, .* } $$) as (a agtype);
a
----------------------------
{"age": 50, "name": "Bob"}
(1 row)
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { .name, .name } $$) as (a agtype);
a
-----------------
{"name": "Bob"}
(1 row)
-- name being selected twice with different value
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { name:'Tom', .* } $$) as (a agtype);
a
----------------------------
{"age": 50, "name": "Tom"}
(1 row)
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map, 'Tom' as name RETURN map { name, .* } $$) as (a agtype);
a
----------------------------
{"age": 50, "name": "Tom"}
(1 row)
-- new entry added
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob', age:50} AS map RETURN map { .name, .age, height:180 } $$) as (a agtype);
a
-------------------------------------------
{"age": 50, "name": "Bob", "height": 180}
(1 row)
-- NULL as a map
SELECT * FROM cypher('map_proj', $$ WITH NULL AS map RETURN map { .name } $$) as (a agtype);
a
----
{}
(1 row)
-- vertex as a map
SELECT * FROM cypher('map_proj', $$ MATCH (n:Actor) RETURN n { .name } $$) as (a agtype);
a
----------------------------
{"name": "Tom Hanks"}
{"name": "Christian Bale"}
(2 rows)
-- edge as a map
SELECT * FROM cypher('map_proj', $$ MATCH ()-[e:ACTED_IN]->() RETURN e { .during } $$) as (a agtype);
a
------------------
{"during": 1990}
{"during": 1995}
{"during": 1999}
{"during": 2002}
{"during": 2008}
(5 rows)
-- syntax error
SELECT * FROM cypher('map_proj', $$ WITH 12 AS map RETURN map { .name } $$) as (a agtype);
ERROR: properties() argument must be a vertex, an edge or null
SELECT * FROM cypher('map_proj', $$ WITH [] AS map RETURN map { .name } $$) as (a agtype);
ERROR: properties() argument must resolve to an object
SELECT * FROM cypher('map_proj', $$ WITH {name:'Bob'} AS map RETURN map { 'name' } $$) as (a agtype);
ERROR: syntax error at or near "'name'"
LINE 1: ...p_proj', $$ WITH {name:'Bob'} AS map RETURN map { 'name' } $...
^
-- advanced
SELECT * FROM cypher('map_proj',
$$
MATCH (a:Actor)-[:ACTED_IN]->(m:Movie)
WITH a, collect(m { .title }) AS movies
RETURN collect(a { .name, movies })
$$) as (a agtype);
a
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
[{"name": "Christian Bale", "movies": [{"title": "The Prestige"}, {"title": "The Dark Knight"}]}, {"name": "Tom Hanks", "movies": [{"title": "Forrest Gump"}, {"title": "Finch"}, {"title": "The Circle"}]}]
(1 row)
-- drop
SELECT drop_graph('map_proj', true);
NOTICE: drop cascades to 5 other objects
DETAIL: drop cascades to table map_proj._ag_label_vertex
drop cascades to table map_proj._ag_label_edge
drop cascades to table map_proj."Actor"
drop cascades to table map_proj."ACTED_IN"
drop cascades to table map_proj."Movie"
NOTICE: graph "map_proj" has been dropped
drop_graph
------------
(1 row)
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