plpgsql

I am trying to update a bunch of columns in a DB for testing purposes of a feature. I have a table that is built with hibernate so all of the columns that are created for an embedded entity begin with the same name. I.e. contact_info_address_street1 , contact_info_address_street2 , etc. I am trying to figure out if there is a way to do something to the affect of: UPDATE table SET contact_info_address_* = null; If not, I know I can do it the long way, just looking for a way to help myself out in the future if I need to do this all over again for a different set of columns. There's no handy

I've got quite heavy query with FOR loop to rewrite and would like to do it simpler, using more SQL instead of plpgsql constructions. The query looks like: FOR big_xml IN SELECT unnest(xpath('//TAG1', my_xml)) LOOP str_xml = unnest(xpath('/TAG2/TYPE/text()', big_xml)); FOR single_xml IN SELECT unnest(xpath('/TAG2/single', big_xml)) LOOP CASE str_xml::INT WHEN 1 THEN INSERT INTO tab1(id, xml) VALUES (1, single_xml); WHEN 2 THEN INSERT INTO tab2(id, xml) VALUES (1, single_xml); WHEN 3 [...] WHEN 11 [...] ELSE RAISE EXCEPTION 'something' END CASE; END LOOP; END LOOP; RETURN xmlelement(NAME "out",

Is it possible to cancel previous operations in a user defined function? For example: CREATE OR REPLACE FUNCTION transact_test () RETURNS BOOLEAN AS $$ BEGIN UPDATE table1 SET ... UPDATE table2 SET ... IF some_condition THEN --Here is possible to cancel all above operations? RETURN FALSE; END IF; RETURN TRUE; END; $$ LANGUAGE plpgsql; Both answers so far are incorrect. If you try to start a transaction or use a SAVEPOINT inside a plpgsql function you get an error message like this: ERROR: cannot begin/end transactions in PL/pgSQL HINT: Use a BEGIN block with an EXCEPTION clause instead.

Is it possible to do the following in Postgres: SELECT column_name FROM information_schema WHERE table_name = 'somereport' AND data_type = 'integer'; SELECT SUM(coulmn_name[0]),SUM(coulmn_name[1]) ,SUM(coulmn_name[3]) FROM somereport; In other words I need to select a group of columns from a table depending on certain criteria, and then sum each of those columns in the table. I know I can do this in a loop, so I can count each column independently, but obviously that requires a query for each column returned from the information schema query. Eg: FOR r IN select column_name from information

I've written a couple of functions in PL/pgSQL and I would like to control their behavior through some configuration entries, changeable at run time too (per session). Is it possible to define new custom-defined configuration entries in postgresql.conf ? If not, what's the work around? As my search results, I came across the part of documentation which says: 18.16. Customized Options This feature was designed to allow parameters not normally known to PostgreSQL to be added by add-on modules (such as procedural languages). This allows extension modules to be configured in the standard ways. If

I have many records which my simple query returning but when i use function it just gives me first record, firstly i create my own data type using, CREATE TYPE my_type (usr_id integer , name varchar(30)); and my function is, CREATE OR REPLACE function test() returns my_type as $$ declare rd varchar := '21'; declare personphone varchar := NULL; declare result my_type; declare SQL VARCHAR(300):=null; DECLARE radiophone_clause text = ''; BEGIN IF rd IS NOT NULL then radiophone_clause = 'and pp.radio_phone = '|| quote_literal(rd); END IF; IF personphone IS NOT NULL then radiophone_clause =

I have a function that looks like this: BEGIN DROP DATABASE IF EXISTS db_1; END; I'm getting the following error: ERROR: DROP DATABASE cannot be executed from a function or multi-command string. Is it not possible to drop a database from a stored procedure in PostgreSQL? I'm using plpgsql. Erwin Brandstetter The error message is just a s clear as the manual on this: DROP DATABASE cannot be executed inside a transaction block. A plgpsql function is surrounded by a transaction block automatically. The long and the short of it: you cannot do that - directly. Is there a particular reason you can't

I have plpgsql function: CREATE OR REPLACE FUNCTION test() RETURNS VOID AS $$ DECLARE my_row my_table%ROWTYPE; BEGIN SELECT * INTO my_row FROM my_table WHERE id='1'; my_row.date := now(); END; $$ LANGUAGE plpgsql; I would like to know if it's possible to directly UPDATE my_row record. The only way I've found to do it now is: UPDATE my_table SET date=now() WHERE id='1'; Note this is only an example function, the real one is far more complex than this. I'm using PostgreSQL 9.2. UPDATE: Sorry for the confusion, what I wanted to say is: SELECT * INTO my_row FROM my_table INTO my_row WHERE id='1';

Say we have a PostgreSQL table like so: CREATE TABLE master ( id INT PRIMARY KEY, ... ); and many other tables referencing it with foreign keys: CREATE TABLE other ( id INT PRIMARY KEY, id_master INT NOT NULL, ... CONSTRAINT other_id_master_fkey FOREIGN KEY (id_master) REFERENCES master (id) ON DELETE RESTRICT ); Is there a way to check (from within trigger function) if a master row is deletable without actually trying to delete it? The obvious way is to do a SELECT on all referencing tables one by one, but I would like to know if there is an easier way. The reason I need this is that I have a