Re: [SQL] int4 to varchar conversion

Larry Bottorff wrote:

> I'm doing something very typical: I created a sequence "seq" and then
> wanted to insert the NEXTVAL('seq') into a varchar field of a table to be
> used as a primary key.
>
> INSERT INTO products (prodno, ...) VALUES (NEXTVAL('seq'), 'blah',
> 'blah');
>
> Where prodno is varchar. I tried a text(...) cast, but it complains of a
> text-varchar mismatch. There is no varchar(...).
>
> Apparently, this is not possible in Postgres(?).
>
> Larry Bottorff SouthWind Internet Access, Inc.
> System Programmer 120 S. Market St. Suite 300
> swprenzl(at)southwind(dot)net Wichita, KS 67202
> ---------------------------------------------------------------------
> In Wichita:(316)263-7964 Elsewhere:1-877-525-7964

try:

INSERT INTO products (prodno, ...) VALUES (NEXTVAL('seq')::text, 'blah', ...);

Example:

test=>CREATE TABLE seq_varchar (field1 varchar(4), field2 text, primary key
(field1));
NOTICE: CREATE TABLE/PRIMARY KEY will create implicit index var_pkey for table
var
CREATE
test=>CREATE SEQUENCE seq_test;
test=>INSERT INTO seq_varchar VALUES (NEXTVAL ( 'seq_test' )::text,
'blablabla');
INSERT 741504 1
test=>SELECT * FROM seq_varchar;
field1|field2
------+---------
1|blablabla
(1 row)

test=>INSERT INTO seq_varchar VALUES (NEXTVAL ( 'seq_test' )::text,
'blahblahblah');
INSERT 741505 1
test=>SELECT * FROM seq_varchar;
field1|field2
------+------------
1|blablabla
2|blahblahblah
(2 rows)

--
Best,
George Moga,
george(at)flex(dot)ro
george(at)cicnet(dot)ro
Braila, ROMANIA