Re: [GENERAL] PostgreSQL with PowerBuilder, and Identity keys (serials) - Mailing list pgsql-general
I’m on PostgreSQL 9.6, 64-bit Windows.
That really is the correct name for the sequence, because I’m not using SERIAL. (I needed everything to match the naming in my existing DB I’m using for the app, Firebird SQL, so the changes to make it work with either DB would be as minimal as possible.) The setup of tables I’m using with this sort of thing are like the following example:
CREATE SEQUENCE GEN_CATEGORY MINVALUE 0;
CREATE TABLE CATEGORY(
CATEGORYNUM SMALLINT NOT NULL DEFAULT NEXTVAL('GEN_CATEGORY'),
DESCRIPTION VARCHAR(20) NOT NULL,
CONSTRAINT PK_CATEGORY PRIMARY KEY (CATEGORYNUM)
);
So as you can see GEN_ plus the tablename is indeed correct. The default on the CATEGORYNUM column is definitely working, which I tested with direct SQL commands: after inserting a row (with the CATEGORYNUM not specified in the INSERT), if I SELECT currval(‘GEN_CATEGORY’), it gives me the correct value, which is also what got saved in that column.
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Dan Cooperstock
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From: Melvin Davidson [mailto:melvin6925@gmail.com]
Sent: August 5, 2017 4:46 PM
To: Dan Cooperstock at Software4Nonprofits <info@software4nonprofits.com>
Cc: pgsql-general@postgresql.org
Subject: Re: [GENERAL] PostgreSQL with PowerBuilder, and Identity keys (serials)
>GetIdentity="Select currval('GEN_&TableName')"
FYI, it would be helpful to specify the PostgreSQL version & O/S, but generically speaking, in PostgreSQL, when you generate a sequence
by specifying serial as data type, the name takews the form of tablename_columnname_seq, so in your case, try
https://www.postgresql.org/docs/9.4/static/datatype-numeric.html#DATATYPE-SERIAL
GetIdentity="Select currval('tablename_column_seq')".
BTW, in PostgreSQL, it is NOT recommended to use mixed case object names, as all names are converted to lowercase unless enclosed in double quotes.
On Sat, Aug 5, 2017 at 4:09 PM, Dan Cooperstock at Software4Nonprofits <info@software4nonprofits.com> wrote:
I’m trying to get a Postgres DB version of an application I write in PowerBuilder working. The thing I’m stuck on is Identity keys – what you set up with the SERIAL attribute or SEQUENCEs / GENERATORs in Postgres.
I have the sequence set up and clearly working. And in PowerBuilder, I have added a section I found online to a file it uses to know how to deal with different aspects of different DBs (PBODBxxx.INI) for Postgres, including the following line for retrieving an identity key after saving a record, when the DB automatically fills in the value:
GetIdentity="Select currval('GEN_&TableName')"
That obviously depends on the generator being named “GEN_” plus the table’s name – which is true in our case.
But nothing like that is happening. Does anyone else have PostgresSQL working with PowerBuilder and identity keys, who can give me some pointers on how get this to work?
Thanks.
--------------------------------------------------------
Dan Cooperstock
DONATION and ACCOUNTS web site: http://www.Software4Nonprofits.com
Email: info@Software4Nonprofits.com
Phone: 416-423-7722
Mail: 57 Gledhill Ave., Toronto ON M4C 5K7, Canada
If you do not want to receive any further emails from Software4Nonprofits, please reply to this email with the subject line "UNSUBSCRIBE", and we will immediately remove you from our mailing list, if you are on it.
--
Melvin Davidson
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you. 
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