Message-ID: <gh-pgjdbc-pgjdbc-3845-c3431049822@github.com>
From: "victornoel (@victornoel)" <noreply+victornoel@github.com>
To: "pgjdbc/pgjdbc" <noreply+pgjdbc-pgjdbc@github.com>
Date: Wed, 22 Oct 2025 08:24:24 +0000
Subject: Re: [pgjdbc/pgjdbc] issue #3845: Wrong result on equality between Date and Timestamp given as query parameter
In-Reply-To: <gh-pgjdbc-pgjdbc-3845@github.com>
References: <gh-pgjdbc-pgjdbc-3845@github.com>
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X-GitHub-Issue: 3845
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Hi,

It feels like the jdbc driver is not properly propagating the type of the parameters, for example if I do:
```java
        var date = java.sql.Date.valueOf(LocalDate.of(2013, 03, 21));
        var timestamp = java.sql.Timestamp.valueOf(LocalDateTime.of(2013, 03, 21, 13, 14));
        var preparedStatement = conn.prepareStatement("SELECT pg_typeof(?), pg_typeof(?)");
        preparedStatement.setDate(1, date);
        preparedStatement.setTimestamp(2, timestamp);
```

I get the error: ERROR: could not determine data type of parameter $1

This means that the problem is not only with timestamp, but also with date.