/* * 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('cypher_unwind'); NOTICE: graph "cypher_unwind" has been created create_graph -------------- (1 row) -- Create nodes and relations SELECT * FROM cypher('cypher_unwind', $$ CREATE (n {name: 'node1', a: [1, 2, 3]}), (m {name: 'node2', a: [4, 5, 6]}), (o {name: 'node3', a: [7, 8, 9]}), (n)-[:KNOWS]->(m), (m)-[:KNOWS]->(o) $$) as (i agtype); i --- (0 rows) SELECT * FROM cypher('cypher_unwind', $$ MATCH (n) RETURN n $$) as (i agtype); i ----------------------------------------------------------------------------------------------- {"id": 281474976710657, "label": "", "properties": {"a": [1, 2, 3], "name": "node1"}}::vertex {"id": 281474976710658, "label": "", "properties": {"a": [4, 5, 6], "name": "node2"}}::vertex {"id": 281474976710659, "label": "", "properties": {"a": [7, 8, 9], "name": "node3"}}::vertex (3 rows) -- -- Test UNWIND clause -- SELECT * FROM cypher('cypher_unwind', $$ UNWIND [1, 2, 3] AS i RETURN i $$) as (i agtype); i --- 1 2 3 (3 rows) SELECT * FROM cypher('cypher_unwind', $$ MATCH (n) WITH n.a AS a UNWIND a AS i RETURN * $$) as (i agtype, j agtype); i | j -----------+--- [1, 2, 3] | 1 [1, 2, 3] | 2 [1, 2, 3] | 3 [4, 5, 6] | 4 [4, 5, 6] | 5 [4, 5, 6] | 6 [7, 8, 9] | 7 [7, 8, 9] | 8 [7, 8, 9] | 9 (9 rows) SELECT * FROM cypher('cypher_unwind', $$ WITH [[1, 2], [3, 4], 5] AS nested UNWIND nested AS x UNWIND x AS y RETURN y $$) as (i agtype); i --- 1 2 3 4 5 (5 rows) -- UNWIND vertices SELECT * FROM cypher('cypher_unwind', $$ MATCH p=(n)-[:KNOWS]->(m) UNWIND nodes(p) as node RETURN node $$) as (i agtype); i ----------------------------------------------------------------------------------------------- {"id": 281474976710657, "label": "", "properties": {"a": [1, 2, 3], "name": "node1"}}::vertex {"id": 281474976710658, "label": "", "properties": {"a": [4, 5, 6], "name": "node2"}}::vertex {"id": 281474976710658, "label": "", "properties": {"a": [4, 5, 6], "name": "node2"}}::vertex {"id": 281474976710659, "label": "", "properties": {"a": [7, 8, 9], "name": "node3"}}::vertex (4 rows) SELECT * FROM cypher('cypher_unwind', $$ MATCH p=(n)-[:KNOWS]->(m) UNWIND nodes(p) as node RETURN node.name $$) as (i agtype); i --------- "node1" "node2" "node2" "node3" (4 rows) -- UNWIND edges SELECT * FROM cypher('cypher_unwind', $$ MATCH p=(n)-[:KNOWS]->(m) UNWIND relationships(p) as relation RETURN relation $$) as (i agtype); i --------------------------------------------------------------------------------------------------------------------------- {"id": 844424930131969, "label": "KNOWS", "end_id": 281474976710658, "start_id": 281474976710657, "properties": {}}::edge {"id": 844424930131970, "label": "KNOWS", "end_id": 281474976710659, "start_id": 281474976710658, "properties": {}}::edge (2 rows) SELECT * FROM cypher('cypher_unwind', $$ MATCH p=(n)-[:KNOWS]->(m) UNWIND relationships(p) as relation RETURN type(relation) $$) as (i agtype); i --------- "KNOWS" "KNOWS" (2 rows) -- UNWIND paths (vle) SELECT * FROM cypher('cypher_unwind', $$ MATCH p=({name:'node1'})-[e:KNOWS*]->({name:'node3'}) UNWIND [p] as path RETURN path $$) as (i agtype); i ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- [{"id": 281474976710657, "label": "_ag_label_vertex", "properties": {"a": [1, 2, 3], "name": "node1"}}::vertex, {"id": 844424930131969, "label": "KNOWS", "end_id": 281474976710658, "start_id": 281474976710657, "properties": {}}::edge, {"id": 281474976710658, "label": "_ag_label_vertex", "properties": {"a": [4, 5, 6], "name": "node2"}}::vertex, {"id": 844424930131970, "label": "KNOWS", "end_id": 281474976710659, "start_id": 281474976710658, "properties": {}}::edge, {"id": 281474976710659, "label": "_ag_label_vertex", "properties": {"a": [7, 8, 9], "name": "node3"}}::vertex]::path (1 row) SELECT * FROM cypher('cypher_unwind', $$ MATCH p=({name:'node1'})-[e:KNOWS*]->({name:'node3'}) UNWIND [p] as path RETURN relationships(path) $$) as (i agtype); i -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- [{"id": 844424930131969, "label": "KNOWS", "end_id": 281474976710658, "start_id": 281474976710657, "properties": {}}::edge, {"id": 844424930131970, "label": "KNOWS", "end_id": 281474976710659, "start_id": 281474976710658, "properties": {}}::edge] (1 row) SELECT * FROM cypher('cypher_unwind', $$ MATCH p=({name:'node1'})-[e:KNOWS*]->({name:'node3'}) UNWIND [p] as path UNWIND relationships(path) as edge RETURN edge $$) as (i agtype); i --------------------------------------------------------------------------------------------------------------------------- {"id": 844424930131969, "label": "KNOWS", "end_id": 281474976710658, "start_id": 281474976710657, "properties": {}}::edge {"id": 844424930131970, "label": "KNOWS", "end_id": 281474976710659, "start_id": 281474976710658, "properties": {}}::edge (2 rows) -- Unwind with SET clause SELECT * FROM cypher('cypher_unwind', $$ MATCH p=(n)-[:KNOWS]->(m) UNWIND nodes(p) as node SET node.type = 'vertex' $$) as (i agtype); i --- (0 rows) SELECT * FROM cypher('cypher_unwind', $$ MATCH (n) RETURN n $$) as (i agtype); i ----------------------------------------------------------------------------------------------------------------- {"id": 281474976710657, "label": "", "properties": {"a": [1, 2, 3], "name": "node1", "type": "vertex"}}::vertex {"id": 281474976710658, "label": "", "properties": {"a": [4, 5, 6], "name": "node2", "type": "vertex"}}::vertex {"id": 281474976710659, "label": "", "properties": {"a": [7, 8, 9], "name": "node3", "type": "vertex"}}::vertex (3 rows) -- -- Clean up -- SELECT drop_graph('cypher_unwind', true); NOTICE: drop cascades to 3 other objects DETAIL: drop cascades to table cypher_unwind._ag_label_vertex drop cascades to table cypher_unwind._ag_label_edge drop cascades to table cypher_unwind."KNOWS" NOTICE: graph "cypher_unwind" has been dropped drop_graph ------------ (1 row)