Re: pl/python composite type array as input parameter - Mailing list pgsql-general
From | Filipe Pina |
---|---|
Subject | Re: pl/python composite type array as input parameter |
Date | |
Msg-id | 13A3AF7C-69B0-422A-86AB-597E9E67CD22@impactzero.pt Whole thread Raw |
In response to | Re: pl/python composite type array as input parameter (Adrian Klaver <adrian.klaver@aklaver.com>) |
Responses |
Re: pl/python composite type array as input parameter
|
List | pgsql-general |
Basically, in an (maybe-over)simplified example:
CREATE OR REPLACE FUNCTION add_transaction(transaction core_transaction)
RETURNS integer AS $$
DECLARE
transaction2 core_transaction;
BEGIN
transaction.field1 := 'lapse’;
transaction2.field2 := transaction.field2;
transaction2.field1 := 'lapse2’;
INSERT INTO core_transaction VALUES(transaction.*);
INSERT INTO core_transaction VALUES(transaction2.*);
RETURN 1;
END
$$
LANGUAGE plpgsql;
So, I wanted to do the same in plpython…
CREATE OR REPLACE FUNCTION add_transaction(transaction core_transaction)
RETURNS integer AS $$
transaction['field1'] = ‘lapse’
transaction2 = { ‘field1’: ‘lapse2’, ‘field2’: transaction[‘field1’] }
# not this but something that would work without enumericating all columns/fields
pl = plpy.execute('INSERT INTO core_transaction VALUES(transaction.*)’)
pl = plpy.execute('INSERT INTO core_transaction VALUES(transaction2.*)')
return 1
END
$$
LANGUAGE plpythonu;
On 02/06/2015, at 15:51, Adrian Klaver <adrian.klaver@aklaver.com> wrote:On 06/02/2015 03:10 AM, Filipe Pina wrote:HI Adrian,
I had a typo in the email:
INSERT INTO my_table VALUES(my_table.*);
was actually
INSERT INTO my_table VALUES(my_var.*);
Aah, that is different:)
So I meant to insert the variable I had in memory (dict representing a row), not the rows from the table..
So where is the variable getting its data?
Or can we see a simple example of what you are trying to do?On 02/06/2015, at 01:44, Adrian Klaver <adrian.klaver@aklaver.com> wrote:
On 06/01/2015 07:42 AM, Filipe Pina wrote:Thanks for the reply anyway, it's a pity though, it'd be useful..
Another bump I've found along the pl/python road: insert ROWTYPE in table..
Maybe you have some hint on that? :)
So, in PLPGSQL I can:
DECLARE
my_var my_table;
BEGIN
my_var.col1 := 'asd';
INSERT INTO my_table VALUES(my_table.*);
END;
How would I do something like that in pl/python?
First, how to declare a ROW-TYPE variable, as they're all python mappings?
my_var = { 'col1': 'asd' } enough? it'd would miss all the other columns...
Second, how to insert it?
plpy.prepare and .execute say they don't support composite types, so I
cannot simply pass
pl = plpy.prepare('INSERT INTO core_customer VALUES ($1)', ['my_table'])
Any workarounds for this? (meaning I wouldn't have to specify any
columns in the insert statement)
http://www.postgresql.org/docs/9.4/interactive/sql-insert.html
pl = plpy.prepare('INSERT INTO core_table SELECT * FROM my_table')
Thanks
On Sex, Mai 29, 2015 at 2:00 , Peter Eisentraut <peter_e@gmx.net> wrote:On 5/18/15 10:52 AM, Filipe Pina wrote:
But one of the functions I need to create needs to accept an array
of records.
PL/Python doesn't support that. Some more code needs to be written to
support that. You did everything correctly. I don't know of a good
workaround.
--
Adrian Klaver
adrian.klaver@aklaver.com
--
Adrian Klaver
adrian.klaver@aklaver.com
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