WendelLana commented on issue #995:
URL: https://github.com/apache/age/issues/995#issuecomment-1612223835
I've been investigating these functions, and here are some queries that we
can use for debugging:
**1. entity_exists**
This function checks if a variable has been deleted and returns true or
false if an entity still exists.
Query
```
SELECT * FROM cypher('graph_name', $$
MATCH (x:Developer)
CREATE (x)-[r:PARTICIPATES]->(p:Project)
RETURN x
$$) AS (vertex agtype);
```
**2. get_label_name**
This function returns the label name, it's used in the AGE functions
`startNode` and `endNode()`
Query
```
SELECT * FROM cypher('graph_name', $$
MATCH (d:Developer)-[r]-(p:Project)
RETURN startNode(r), endNode(r)
$$) as (start_node agtype, end_node agtype);
```
I'll look more into these functions and their query plan trees to think of
solutions for label ID
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