jrgemignani commented on code in PR #1562:
URL: https://github.com/apache/age/pull/1562#discussion_r1484913497
##########
regress/expected/cypher_subquery.out:
##########
@@ -0,0 +1,333 @@
+LOAD 'age';
+SET search_path TO ag_catalog;
+SELECT * FROM create_graph('exists_subquery');
+NOTICE: graph "exists_subquery" has been created
+ create_graph
+--------------
+
+(1 row)
+
+SELECT * FROM cypher('exists_subquery', $$
+
CREATE (:person {name: "Briggite", age: 32})-[:knows]->(:person {name:
"Takeshi", age: 28}),
+
(:person {name: "Faye", age: 25})-[:knows]->(:person {name: "Tony",
age: 34})-[:loved]->(:person {name : "Valerie", age: 33}),
+
(:person {name: "Calvin", age: 6})-[:knows]->(:pet {name: "Hobbes"}),
+
(:person {name: "Charlie", age: 8})-[:knows]->(:pet {name :
"Snoopy"})
+
$$) AS (result agtype);
+ result
+--------
+(0 rows)
+
+SELECT * FROM cypher('exists_subquery', $$ MATCH (a) RETURN (a) $$) AS (result
agtype);
+ result
+---------------------------------------------------------------------------------------------------
+ {"id": 844424930131969, "label": "person", "properties": {"age": 32, "name":
"Briggite"}}::vertex
+ {"id": 844424930131970, "label": "person", "properties": {"age": 28, "name":
"Takeshi"}}::vertex
+ {"id": 844424930131971, "label": "person", "properties": {"age": 25, "name":
"Faye"}}::vertex
+ {"id": 844424930131972, "label": "person", "properties": {"age": 34, "name":
"Tony"}}::vertex
+ {"id": 844424930131973, "label": "person", "properties": {"age": 33, "name":
"Valerie"}}::vertex
+ {"id": 844424930131974, "label": "person", "properties": {"age": 6, "name":
"Calvin"}}::vertex
+ {"id": 844424930131975, "label": "person", "properties": {"age": 8, "name":
"Charlie"}}::vertex
+ {"id": 1688849860263937, "label": "pet", "properties": {"name":
"Hobbes"}}::vertex
+ {"id": 1688849860263938, "label": "pet", "properties": {"name":
"Snoopy"}}::vertex
+(9 rows)
+
+SELECT * FROM cypher('exists_subquery', $$ MATCH (a:person)
+
WHERE EXISTS {(a:person)-[]->(:pet)}
+
RETURN (a) $$) AS (result agtype);
+ result
+-------------------------------------------------------------------------------------------------
+ {"id": 844424930131974, "label": "person", "properties": {"age": 6, "name":
"Calvin"}}::vertex
+ {"id": 844424930131975, "label": "person", "properties": {"age": 8, "name":
"Charlie"}}::vertex
+(2 rows)
+
+-- trying to use b when not defined, should fail
+SELECT * FROM cypher('exists_subquery', $$ MATCH (a:person)
+
WHERE EXISTS {(a:person)-[]->(b:pet)}
+
RETURN (a) $$) AS (result agtype);
+ERROR: variable `b` does not exist
+LINE 2: WHERE EXISTS {(a:person)-[]->(b:pet)}
+ ^
+--query inside
+SELECT * FROM cypher('exists_subquery', $$ MATCH (a:person)
+
WHERE EXISTS {MATCH (a:person)-[]->(b:pet) RETURN b}
+
RETURN (a) $$) AS (result agtype);
+ result
Review Comment:
Is this the correct output? It doesn't seem like it should be.
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