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From: cgm-aw (@cgm-aw) <[email protected]>
To: pgjdbc/pgjdbc <[email protected]>
Subject: Re: [pgjdbc/pgjdbc] PR #3606: fix: add support for multiple schemas via PgConnection.setSchema
Date: Thu, 17 Apr 2025 12:53:05 +0000
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

Yes `current_schema()` is a bit misleading, although the documentation states it correctly: "Returns the name of the schema that is **first** in the search path" - it does not say that it shows **all** schemas on the search_path. To view all schemas on the path, you have to call `show search_path`.
Check this output:
```
postgres=# set session search_path to 'postgres','public';
SET
postgres=# select current_schema();
 current_schema 
----------------
 public
(1 row)

postgres=# show search_path;
   search_path    
------------------
 postgres, public
(1 row)
```

So Postgres does indeed support multiple schemas on the search path, which is why the JDBC driver allows setting multiple schemas in the connection string.

I need this feature because in our enterprise setting, I cannot edit the JDBC connection string and I have multiple database functions which call other functions without the schema in their prefix, which I also cannot edit.

So to make my setup work, I have to be able to programmatically add multiple schemas to my search_path. 
Of course I could call `set session search_path to...` in my application, but I think support in the driver would be nice 😃 

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  Subject: Re: [pgjdbc/pgjdbc] PR #3606: fix: add support for multiple schemas via PgConnection.setSchema
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