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Posted to dev@age.apache.org by "shady-cj (via GitHub)" <gi...@apache.org> on 2023/05/27 04:28:06 UTC
[GitHub] [age] shady-cj opened a new issue, #950: Typo in exists() predicate function documentation
shady-cj opened a new issue, #950:
URL: https://github.com/apache/age/issues/950
Using the exists(expression) one can check for a property or path… according to the example given in the documentation [here](https://age.apache.org/age-manual/master/functions/predicate_functions.html) the following examples raised errors.
```
SELECT * FROM cypher('graph_name', $$
MATCH (n)
WHERE exists(n)-[]-(name: 'Willem Defoe')
RETURN n.full_name
$$) as (full_name agtype);
```
**The following error was raised**
```
ERROR: syntax error at or near ")"
LINE 3: WHERE exists(n)-[]-(name: 'Willem Defoe')
^
```
**Expected behavior**
The expected behavior is to return either `null` or `surname` of agtype that matches the `WHERE` clause
**The expected query**
The expected query that worked is the following
```
SELECT * FROM cypher('graph_name', $$
MATCH (n)
WHERE exists((n)-[]-({name: 'Willem Defoe'}))
RETURN n.full_name
$$) as (full_name agtype);
```
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[GitHub] [age] Omar-Saad commented on issue #950: Typo in exists() predicate function documentation
Posted by "Omar-Saad (via GitHub)" <gi...@apache.org>.
Omar-Saad commented on issue #950:
URL: https://github.com/apache/age/issues/950#issuecomment-1565687029
The documentation contains a syntax error, and the query should be modified as you mentioned.
```
SELECT * FROM cypher('graph_name', $$
MATCH (n)
WHERE exists((n)-[]-({name: 'Willem Defoe'}))
RETURN n.full_name
$$) as (full_name agtype);
```
You can create a PR to correct this error.
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[GitHub] [age] shady-cj closed issue #950: Typo in exists() predicate function documentation
Posted by "shady-cj (via GitHub)" <gi...@apache.org>.
shady-cj closed issue #950: Typo in exists() predicate function documentation
URL: https://github.com/apache/age/issues/950
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[GitHub] [age] abdullahzia-6464 commented on issue #950: Typo in exists() predicate function documentation
Posted by "abdullahzia-6464 (via GitHub)" <gi...@apache.org>.
abdullahzia-6464 commented on issue #950:
URL: https://github.com/apache/age/issues/950#issuecomment-1565392386
Your issue has been noted. I have opened a [pull request](https://github.com/apache/age-website/pull/160) in the relevant repository to update the documentation.
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[GitHub] [age] KamleshKumar427 commented on issue #950: Typo in exists() predicate function documentation
Posted by "KamleshKumar427 (via GitHub)" <gi...@apache.org>.
KamleshKumar427 commented on issue #950:
URL: https://github.com/apache/age/issues/950#issuecomment-1565340956
Yes, You noticed right, there is a typo in the documentation.
Apache-age documentation is maintained under another GitHub repo at:
https://github.com/apache/age-website
You can correct that typo and create a PR, or open an issue at that GitHub repo.
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[GitHub] [age] titoausten commented on issue #950: Typo in exists() predicate function documentation
Posted by "titoausten (via GitHub)" <gi...@apache.org>.
titoausten commented on issue #950:
URL: https://github.com/apache/age/issues/950#issuecomment-1565304851
Yes, `exists()` takes only `n` a vertice as an argument whereas it is supposed to take a path.
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[GitHub] [age] AhmedMo0 commented on issue #950: Typo in exists() predicate function documentation
Posted by "AhmedMo0 (via GitHub)" <gi...@apache.org>.
AhmedMo0 commented on issue #950:
URL: https://github.com/apache/age/issues/950#issuecomment-1565562724
You are right. EXISTS clause take argument property which is a vertex or a path so, in this example it should be like this
`WHERE exists((n)-[]-(name: 'Willem Defoe'))`
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