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Re: Insert NULL value with to_numeric()

From: "Aaron Bono" <postgresql(at)aranya(dot)com>
To: "Ghislain Bob Hachey" <ghachey(at)pipolfastaem(dot)gov(dot)sb>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: Insert NULL value with to_numeric()
Date: 2006-07-20 01:24:56
Message-ID: bf05e51c0607191824v1911ff93xda6621cff3534a80@mail.gmail.com (view raw or flat)
Thread:
Lists: pgsql-admin
On 7/19/06, Ghislain Bob Hachey <ghachey(at)pipolfastaem(dot)gov(dot)sb> wrote:
>
> Hello all,
>
> I'm a newbie.  PostgreSQL 8.1.4. Fedora Core 5.
>
> I'm writing a small java application that will import CSV txt files into
> my DB.  The SQL statement I'm sending to pgsql looks like this:
>
> "INSERT into table (col1,col2,col3) values (to_number(?,
> '999'),to_timestamp(?, 'MM/DD/YYYY HH24:MI:SS'),to_number(?, '9999');
>
> Values are taken from a String array.
>
> sometimes in col3 (smallint in pgsql DB) I need to insert a NULL value
> but when I do I get the following error message:
>
> invalid input syntax for type numeric: " "
>
> I've search the archives and Internet and found similar situations but I
> guess not experienced enough to fix this myself with info that I've
> found.



Why use to_number or to_timestamp?  I assume you are using setString in your
prepared statement.  In your Java code you can use setNull if the value is
null and setInt or setLong or setTimestamp if it is not.  Then you don't
need the to_number or to_timestamp.

Something like this:

Integer value1;
Date value2;
Integer value3;
PreparedStatement stmt = conn.prepareStatement(
   "INSERT INTO table (col1,col2,col3) " +
   "VALUES (?, ?, ?)"
);
int index = 1;
stmt.setInt(index++, value1.intValue());
stmt.setTimestamp(index++, new java.sql.Timestamp(value2.getTime()));
if (value3 == null) {
   stmt.setNull(index++, Types.INTEGER);
} else {
   stmt.setInt(index++, value3.intValue());
}

==================================================================
   Aaron Bono
   Aranya Software Technologies, Inc.
   http://www.aranya.com
==================================================================

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