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

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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

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