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Truncating display by default in postgres psql select statements


Truncating display by default in postgres psql select statements

By : Alfonso Espinosa And
Date : November 22 2020, 09:00 AM
should help you out There is no way with built-in options of psql that I would know of.
You can achieve your goal with a function like @Drazen suggested - just much simpler:
code :
CREATE OR REPLACE FUNCTION f_trunc_columns(_tbl anyelement, _len int = 25)
  RETURNS SETOF anyelement AS
$func$
DECLARE
   _typ  CONSTANT regtype[] := '{bpchar, varchar}';  -- types to shorten
BEGIN
   RETURN QUERY EXECUTE (
   SELECT format('SELECT %s FROM %s'
               , string_agg(CASE WHEN a.atttypid = 'text'::regtype  -- simple case text
                              THEN format('left(%I, %s)', a.attname, _len)
                            WHEN a.atttypid = ANY(_typ)             -- other short types
                              THEN format('left(%I::text, %s)::%s'
                                 , a.attname, _len, format_type(a.atttypid, a.atttypmod))
                            ELSE quote_ident(a.attname) END         -- rest
                          , ', ' ORDER BY a.attnum)
               , pg_typeof(_tbl))
   FROM   pg_attribute a
   WHERE  a.attrelid = pg_typeof(_tbl)::text::regclass
   AND    NOT a.attisdropped  -- no dropped (dead) columns
   AND    a.attnum > 0        -- no system columns
   );
END
$func$  LANGUAGE plpgsql;
SELECT * FROM f_trunc_columns(NULL::my_table);
SELECT * FROM f_trunc_columns(NULL::"MySchema"."My_funny_tbl", 11);
SELECT "FoO_id", left(c_text, 11), left(c_vc, 11)::character varying
FROM   "FoO";


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psql set default statement_timeout as a user in postgres

psql set default statement_timeout as a user in postgres


By : Marco Chali Harvey
Date : March 29 2020, 07:55 AM
seems to work fine You could use your .psqlrc file (if you don't have one in your home directory, create it; if you're on Windows instead of *nix, the file is %APPDATA%\postgresql\psqlrc.conf instead) and set the following command:
code :
set statement_timeout to 60000; commit;
show statement_timeout;
In Postgres psql shell, is it possible to just display the first line of a large text field?

In Postgres psql shell, is it possible to just display the first line of a large text field?


By : Christos Tziv
Date : March 29 2020, 07:55 AM
I wish this help you If you only want to display the first 20 characters of text in a field, you can do this:
code :
SELECT LEFT(datatext,20) AS First_20_Chars FROM tablename LIMIT 1;
Multiple Select Statements and PSQL

Multiple Select Statements and PSQL


By : Vini
Date : March 29 2020, 07:55 AM
it should still fix some issue I am trying to understand how to run multiple select statements from a script and then output the matches to different text files. I have about 20 different select statements. , Figured it out... finally
How to select a schema in postgres when using psql?

How to select a schema in postgres when using psql?


By : ktech
Date : March 29 2020, 07:55 AM
may help you . In PostgreSQL the system determines which table is meant by following a search path, which is a list of schemas to look in.
The first matching table in the search path is taken to be the one wanted, otherwise, if there is no match a error is raised, even if matching table names exist in other schemas in the database.
Is there any way to print out debug statements in Postgres PSQL?

Is there any way to print out debug statements in Postgres PSQL?


By : Alma Alejandra Jimen
Date : March 29 2020, 07:55 AM
like below fixes the issue I'm thinking something in the lines of DBMS_OUTPUT.PUT_LINE in Oracle, it allows you to trace what's going on in a stored procedure in the exactly same way you would use printf, puts or some other STDIO writing proc in a "normal" programming language, i.e. , You can use RAISE NOTICE like this:
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