Thread: helo

On Mon, Feb 22, 2010 at 2:10 PM, beulah prasanthi <itsbeulah@gmail.com> wrote:
> Helo
>      I am working on spring project with postgres 8.4
> i wrote a function in postgrees which i am passing the argument email
> email[] array
> From front end we need to insesrt data into that emailarray .so i used
> java.arraylist.util
> while i am running i got the following error Please help me
>
> error:
> org.postgresql.util.PSQLException: Cannot cast an instance of
> java.util.ArrayList to type Types.ARRAY


You have cross-posted.

You may want to compose a comma separated values string out of the
values you'd like to send as an array, Then send this string instead
of the array (ofcourse for your postgreSQL function, you will need to
change the datatype of your input variable to TEXT). Then inside your
postgres function unpack the CSV text into an array using some regular
expression(s).

maybe something like this.

Assuming "_my_CSV_string" is your text variable that contains the CSV data.

SELECT * FROM regexp_split_to_array(_my_CSV_string,E',(?=(?:[^\"]*\"[^\"]*\")*(?![^\"]*\"))'))AS
my_array;



Allan.

On Mon, 22 Feb 2010, beulah prasanthi wrote:

> Helo
>      I am working on spring project with postgres 8.4
> i wrote a function in postgrees which i am passing the argument email
> email[] array
> From front end we need to insesrt data into that emailarray .so i used
> java.arraylist.util
> while i am running i got the following error Please help me
>
> error: 
> org.postgresql.util.PSQLException: Cannot cast an instance of
> java.util.ArrayList to type Types.ARRAY
>

You need to pass an instance of java.sql.Array, not a Collection or
something else that is array like.

Also please only report an issue once rather than a half dozen times.

Kris Jurka

Kris Jurka <books@ejurka.com> wrote:

> You need to pass an instance of java.sql.Array, not a Collection
> or something else that is array like.

Ah, right.  After extracting an array from the java.util.ArrayList,
it needs to be turned into a java.sql.Array using the
Connection.createArrayOf method.

Most definitely not a PostgreSQL bug.

-Kevin

On 2010-02-22, beulah prasanthi wrote:

> Helo
>      I am working on spring project with postgres 8.4
> i wrote a function in postgrees which i am passing the
> argument email email[] array
> From front end we need to insesrt data into that emailarray
> .so i used java.arraylist.util
> while i am running i got the following error Please help me
>
> error:
> org.postgresql.util.PSQLException: Cannot cast an instance of
> java.util.ArrayList to type Types.ARRAY
>

The array support in JDBC is imo nothing better than horrible. However,
the way to go is:
    Connection c = getConnection();
    Array arr = c.createArrayOf("text", email);

    PreparedStatement p = c.prepareStatement(...);
    p.setArray(index, arr);

Also notice, that there is no nice way to test array data in frameworks
like DBUnit and others.


--
Robert...