AnnXie2001 opened a new issue, #2200:
URL: https://github.com/apache/age/issues/2200
**Describe the bug**
if we use not exists to find a path，the age will pass the query that cannot
optimize to use anti join. So, when the table is large, the speed is so low.
**How are you accessing AGE (Command line, driver, etc.)?**
command line.
**What data setup do we need to do?**
```
EXPLAIN (costs off)
SELECT * FROM cypher('ldbc',$$
MATCH
(tag:Tag {name:
"Slovenia"})<-[:HAS_TAG]-(message:Message),(message)<-[:REPLY_OF]-(comment:Comment)
WHERE NOT EXISTS((comment)-[:HAS_TAG]->(tag))
RETURN
tag.name
ORDER BY
tag.name ASC
LIMIT 100
$$) AS (name agtype);
```
**What is the necessary configuration info needed?**
the query plan as below：
Limit
-> Sort
Sort Key: (agtype_access_operator(VARIADIC
ARRAY[ag_catalog._agtype_build_vertex(tag.id, _label_names('167798'::oid,
tag.id), tag.properties), '"name"'::agtype]))
-> Hash Join
Hash Cond: (_age_default_alias_1.start_id = comment_1.id)
Join Filter: (NOT ((SubPlan 1))::agtype)
-> Hash Join
Hash Cond:
((age_id(ag_catalog._agtype_build_vertex(message_1.id,
_label_names('167798'::oid, message_1.id), message_1.properties)))::graphid =
_age_d
efault_alias_1.end_id)
-> Hash Join
Hash Cond: (message_1.id =
_age_default_alias_0.start_id)
-> Append
-> Seq Scan on "Message" message_1
-> Seq Scan on "_agr_Comment-Message"
message_2
-> Seq Scan on "_agr_Message-Post"
message_3
-> Hash
-> Hash Join
Hash Cond:
(_age_default_alias_0.end_id = tag.id)
-> Seq Scan on "HAS_TAG"
_age_default_alias_0
-> Hash
-> Seq Scan on "Tag" tag
Filter: (properties @>
'{"name": "Slovenia"}'::agtype)
-> Hash
-> Seq Scan on "REPLY_OF" _age_default_alias_1
-> Hash
-> Append
-> Seq Scan on "Comment" comment_1
-> Seq Scan on "_agr_Comment-Message" comment_2
SubPlan 1
-> Seq Scan on "HAS_TAG" _age_default_alias_2
Filter: ((start_id = comment_1.id) AND (end_id =
(age_id(ag_catalog._agtype_build_vertex(tag.id, _label_names('167798'::oid,
tag.id), tag.properties
)))::graphid))
**What is the command that caused the error?**
the type convert
**Expected behavior**
Limit
-> Sort
Sort Key: (agtype_access_operator(VARIADIC
ARRAY[ag_catalog._agtype_build_vertex(tag.id, _label_names('167798'::oid,
tag.id), tag.properties), '"name"'::agtype]))
-> Hash Join
Hash Cond: (message_1.id = _age_default_alias_0.start_id)
-> Append
-> Seq Scan on "Message" message_1
-> Seq Scan on "_agr_Comment-Message" message_2
-> Seq Scan on "_agr_Message-Post" message_3
-> Hash
-> Hash Left Join
Hash Cond:
((age_id(ag_catalog._agtype_build_vertex(comment_1.id,
_label_names('167798'::oid, comment_1.id), comment_1.properties)))::graphid =
_age_default_alias_2.start_id)
-> Hash Join
Hash Cond: (comment_1.id =
_age_default_alias_1.start_id)
-> Append
-> Seq Scan on "Comment" comment_1
-> Seq Scan on
"_agr_Comment-Message" comment_2
-> Hash
-> Hash Join
Hash Cond:
(_age_default_alias_1.end_id = _age_default_alias_0.start_id)
-> Seq Scan on "REPLY_OF"
_age_default_alias_1
-> Hash
-> Hash Join
Hash Cond:
(_age_default_alias_0.end_id = tag.id)
-> Seq Scan on
"HAS_TAG" _age_default_alias_0
-> Hash
-> Seq Scan
on "Tag" tag
Filter:
(properties @> '{"name": "Slovenia"}'::agtype)
-> Hash
-> Hash Join
Hash Cond:
(_age_default_alias_2.end_id = tag2.id)
-> Seq Scan on "HAS_TAG"
_age_default_alias_2
-> Hash
-> Seq Scan on "Tag" tag2
Filter:
(ag_catalog._agtype_build_vertex(id, _label_names('167798'::oid, id),
properties) IS NULL)
**Environment (please complete the following information):**
- Version: [e.g. 0.4.0]
**Additional context**
Add any other context about the problem here.
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