rafsun42 opened a new issue, #1028:
URL: https://github.com/apache/age/issues/1028
**Describe the bug**
If any `reserved_keyword` specified in `cypher_gram.y` is used as a label
name in a MATCH clause, the label name is converted to lowercase. As a result,
the MATCH clause return empty result set because the lowercase'd label name
does not match with the original label in `ag_label` table.
**How are you accessing AGE (Command line, driver, etc.)?**
- Command line (PG 12.10)
**What data setup do we need to do?**
None
**What is the necessary configuration info needed?**
N/A
**What is the command that caused the error?**
```pgsql
select * from cypher('imdb', $$ EXPLAIN MATCH (x:IN)-[]->() RETURN 1 $$) as
(a agtype);
```
In `cypher_gram.y` file, `n->label` is `in`, instead of `IN`.
```c
...
path_node:
'(' var_name_opt label_opt properties_opt ')'
{
cypher_node *n;
n = make_ag_node(cypher_node);
n->name = $2;
n->label = $3;
n->parsed_label = $3;
n->props = $4;
n->location = @2;
$$ = (Node *)n;
}
;
...
```
This issue occurs for any `reserved_keyword`.
This issue also occurs in the definition of `path_relationship` in
`cypher_gram.y`.
**Expected behavior**
`n->label` should be `IN`.
**Environment (please complete the following information):**
AGE is compiled from the branch where PG12 is merged with master.
Postgresql version is 12.10.
**Additional context**
N/A
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