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Thread: Function to dump function ddl

Function to dump function ddl

From

"Little, Douglas"

Date:

09 August 2012, 17:07:00

Hi,

In deploying new versions of function source, I want to export the current definition to a file.

After looking around it seems that I needed to create my own function.

I got the function to work, but am having a slight problem with the execution of the exported file.

It seems that if I include line breaks they are not being interpreted by psql on input.

Other than leaving the line breaks out, does anybody have any suggestions for getting psql to ignore the line feeds.

I tried to replace the \n with blanks on output, but failed.

Some specifics might help.

Running on redhat, pg 8.2.15/greenplum 4.1.2.6

Ddl export

d1gp1=> \copy (SELECT dba_work.pg_get_functiondef('da_test.aggairbookingitinasbookedprc'::regproc)) to test1.sql

d1gp1=>

exported file

[dlittle@eginformatica02p ~]$ cat test1.sql

\nCREATE OR REPLACE FUNCTION da_test.aggairbookingitinasbookedprc(numeric)\nRETURNS void AS\n$BODY$\n\n/* Declare Variables*/\n-- modified 2/28/2010\nDECLARE\n vTimestamp TIMESTAMP(6); -- Variable to Store Current Timestamp during diffent process stage.\n vAuditKey VARCHAR(18); -- Variable to Capture Lastest Auditkey for Specific Dimension Processing.\n vSpStep INTEGER;

Import

d1gp1=> \i test1.sql

psql:test1.sql:1: invalid command \nCREATE

d1gp1=>

Replacing \n attempt

d1gp1=> \copy (select replace(dba_work.pg_get_functiondef('da_test.aggairbookingitinasbookedprc'::regproc),E'\n',' ')) to test1.sql WARNING: nonstandard use of escape in a string literal

LINE 1: ...test.aggairbookingitinasbookedprc' ::regproc ) ,E '\n' , ' '...

HINT: Use the escape string syntax for escapes, e.g., E'\r\n'.

ERROR: type "e" does not exist

LINE 1: ...a_test.aggairbookingitinasbookedprc' ::regproc ) ,E '\n' , '...

\copy: ERROR: type "e" does not exist

LINE 1: ...a_test.aggairbookingitinasbookedprc' ::regproc ) ,E '\n' , '...

d1gp1=> \copy (select replace(dba_work.pg_get_functiondef('da_test.aggairbookingitinasbookedprc'::regproc),'\\n',' ')) to test1.sql WARNING: nonstandard use of \\ in a string literal

LINE 1: ..._test.aggairbookingitinasbookedprc' ::regproc ) , '\\n' , ' ...

Doug Little

Sr. Data Warehouse Architect | Business Intelligence Architecture | Orbitz Worldwide

500 W. Madison, Suite 1000 Chicago IL 60661| Office 312.260.2588 | Fax 312.894.5164 | Cell 847-997-5741

Douglas.Little@orbitz.com

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Re: Function to dump function ddl

From

"Albe Laurenz"

Date:

10 August 2012, 08:51:59

Douglas Little wrote:
> In deploying new versions of function source, I want to export the
current definition to a file.
>
> After looking around it seems that I needed to create my own function.
>
> I got the function to work, but am having a slight problem with the
execution of the exported file.
>
> It seems that if I include line breaks they are not being interpreted
by psql on input.
>
> Other than leaving the line breaks out,  does anybody have any
suggestions for getting psql to ignore
> the line feeds.
>
> I tried to replace the \n with blanks on output, but failed.
>
> Some specifics might help.
> Running on redhat,  pg 8.2.15/greenplum 4.1.2.6
>
> Ddl export
>
> d1gp1=> \copy (SELECT
dba_work.pg_get_functiondef('da_test.aggairbookingitinasbookedprc'::regp
roc))
> to test1.sql
>
> exported file
>
> [dlittle@eginformatica02p ~]$ cat test1.sql
>
> \nCREATE OR REPLACE FUNCTION
da_test.aggairbookingitinasbookedprc(numeric)\nRETURNS void
> AS\n$BODY$\n\n/* Declare Variables*/\n-- modified 2/28/2010\nDECLARE\n
vTimestamp TIMESTAMP(6);
> -- Variable to Store Current Timestamp during diffent process stage.\n
vAuditKey VARCHAR(18);
> -- Variable to Capture Lastest Auditkey for Specific Dimension
Processing.\n    vSpStep INTEGER;

Using COPY for that is not the best choice, as you see.

If you do it from psql, why not use \o?

test=> \pset tuples_only on
test=> \pset format unaligned
test=> \o func.sql
test=> SELECT pg_get_functiondef('first'::regproc);
test=> \q

$ cat func.sql
CREATE OR REPLACE FUNCTION laurenz.first(text, integer)
 RETURNS integer
 LANGUAGE sql
 STABLE STRICT
AS $function$SELECT id FROM test WHERE val=$1 LIMIT $2$function$

Does that help?

Yours,
Laurenz Albe