PL/pgSQL is the default procedural language for the PostgreSQL database system. Questions about PL/pgSQL should probably be tagged "PostgreSQL" as well.

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19
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4answers
7k views

PostgreSQL Stored Procedure Performance

Coming from a MySQL background, where stored procedure performance (older article) and usability are questionable, I am evaluating PostgreSQL for a new product for my company. One of the things I ...
10
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2answers
484 views

Postgres query plan of a UDF invocation written in pgpsql

It's possible when using the pgadmin or plsql to get a hold of a query plan for a sql statement executed via a UDF (using EXPLAIN). So, how do I get a hold of the query plan for a particular ...
6
votes
3answers
561 views

Issue with composite type in an UPSERT function

I have a function in PostgreSQL 9.1 called fun_test. It has a composite type as input parameter and I keep getting a casting error when I call it. CREATE OR REPLACE FUNCTION netcen.fun_test(myobj ...
7
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1answer
2k views

SQL injection in Postgres functions vs prepared queries

In Postgres, are prepared queries and user defined functions equivalent as a mechanism for guarding against SQL injection? Are there particular advantages in one approach over the other?
2
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2answers
328 views

How to do WHERE x IN (val1, val2,…) in plpgsql

I would like to update a selection of rows in a table; this works... UPDATE t1 SET col1 = 'newvalue' WHERE col0 in (2, 4, 5); But how can I do the same in a plpgsql function? The following gives a ...
2
votes
2answers
2k views

Insert values from a record variable into a table

I am developing a user-defined function that takes two arguments: create or replace function gesio( events_table_in regclass, events_table_out regclass) returns void as $$ ... $$ ...
2
votes
2answers
1k views

Running a CTE query in a loop using PL/pgSQL

I'm trying to execute query that is repeatedly called in a loop using plpgsql -the loop iterates over another table (named coordinates) that contains top left and bottom right latitude/longitude ...
22
votes
4answers
16k views

Most idiomatic way to implement UPSERT in Postgresql nowadays

I've read about different UPSERT implementations in PostgreSQL, but all of these solutions are relatively old or relatively exotic (using writeable CTE, for example). And I'm just not a psql expert ...
14
votes
1answer
10k views

Create index if it does not exist

I am working on a function that allows me to add an index if it does not exist. I am running into the problem that I cannot get a list of indexes to compare to. Any thoughts? This is a similar issue ...
1
vote
2answers
2k views

PostgreSQL stored procedure to return rows or empty set

I have a stored procedure, which RETURNS SETOF ct_custom_type and inside I do RETURN QUERY EXECUTE 'some dynamic query' And I want to do this: If this 'dynamic query' returns >= 10 rows, I want to ...
2
votes
2answers
364 views

Bug in PL/pgSQL function creation

I don't know if this question better suits here or in SO ... This is a script that I'd like to launch (the code of the function was copied from a question on SO): \c mydb create or replace function ...
2
votes
1answer
40 views

trigger can't access column loop

SSCCE: The following script: $ cat test.sql CREATE TABLE public.foo ( loop INTEGER ); CREATE OR REPLACE FUNCTION public.foo_fun(loop INTEGER) RETURNS BOOLEAN AS $$ SELECT TRUE; $$ LANGUAGE SQL; ...
2
votes
1answer
4k views

Declare variable of table type in PL/pgSQL

I am wondering if there is a way to declare a variable of type table in PL/pgSQL to hold query results? For instance how can I express something like: q1 = select * from foo; q2 = select * from bar; ...
1
vote
2answers
45 views

Can I find errors without using testing data for all the branches of each function?

In PostgreSQL, syntax errors (except for trivial syntax errors) are reported while running the code in question; unlike Oracle, PostgreSQL can't find errors without running the part of the code. This ...
1
vote
2answers
270 views

Dynamic UPDATE fails due to unwanted parenthesis around string in plpgsql

Using PostgreSQL 9.3.4 on Mac OSX 10.9.2 with Postgres.app. I want to apply a function to all columns in a table, specifically I want to trim white space. So far I've got this in a file test.sql: ...
1
vote
1answer
179 views

Self-join unique pairs

I have a table (players) containing a list of players, I would like to pair up these players in a unique way, so that every player's opponent is unique every round (ie. every time the SELECT query is ...
1
vote
1answer
1k views

Concatenation of setof type or setof record

I use Postgresql 9.1 with Ubuntu 12.04. In a plpgsql function I try to concatenate setof type returned from another function. the type pair_id_value in question is created with create type ...