Re: Is there a way to return "true"/"false" string for boolean type?

[ChoonSoo Park <luispark@xxxxxxxxx>]

On Tue, Jan 7, 2014 at 2:55 PM, Joe Van Dyk <joe@xxxxxxxxx> wrote:

On Tue, Jan 7, 2014 at 10:41 AM, ChoonSoo Park <luispark@xxxxxxxxx> wrote:

On Tue, Jan 7, 2014 at 1:29 PM, Szymon Guz <mabewlun@xxxxxxxxx> wrote:

On 7 January 2014 19:11, ChoonSoo Park <luispark@xxxxxxxxx> wrote:

Hello Gurus,

I have several tables with lots of boolean columns.

When I run select query for the tables, I always get 't' or 'f' for boolean types.

Is there a way to return 'true' or 'false' string for boolean type except using CASE WHEN ... clause?

I mean global postgres configuration setting to return 'true'/'false' instead of t/f.

Thank you,

Choon Park

Hi,

if you cast the boolean values to text, then you should get 'true'/'false':

SELECT true::boolean::text, false::boolean::text;

 text | text  

------+-------

 true | false

(1 row)

Does it solve your problem? Why do you want to have true/false instead of t/f?

regards,

Szymon

In the custom stored function, I'm returning a resultset using hstore function.

RETURN QUERY SELECT a few other columns, hstore(t.*) FROM table t WHERE condition.

I don't want to change it to 

SELECT a few other columns, hstore('c1', CAST(t.c1 AS TEXT)) || hstore('c2', CAST(t.c2 AS TEXT)) || ...hstore('cn', t.cn::text) || ... FROM table t WHERE condition.

Can you use json instead of hstore?

# select * from test;

 id | b

----+---

  1 | t

  2 | f

# select to_json(test) from test;

      to_json

--------------------

 {"id":1,"b":true}

 {"id":2,"b":false}

Joe 

to_json can be a good solution for me. Unfortunately, at this moment, we don't have a plan to upgrade 9.1 to 9.3. I should still rely on hstore function to hold key/value pairs.

-Choon Park