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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PostgreSQL stored function that returns arbitrary resultset

I would like to write a PostgreSQL stored function that essentially behaves like the stored procedures I know and love from MSSQL and MySQL where I can just wrap a query that takes no parameters and ...
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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 ...
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How to turn off all RAISE NOTICE on production server?

I put a lot of RAISE NOTICE in functions for debugging purpose. I think this will affect performance, so they should be removed on production environment. Is there any way to opt-out those ...
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How to use array variable in query in PostgreSQL

Create table t1 ( xcheck varchar[], name text ); CREATE OR REPLACE FUNCTION fn_acgroup(xch varchar[]) RETURNS record AS DECLARE xrc as record; execute 'select name from t1 where xcheck @> ...
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Error: set_valued function called in context that cannot accept a set. What is it about?

I use Postgresql 9.1, with ubuntu 12.04. Inspired by Craig's answer to my question Concatenation of setof type or setof record I thought I would go well with using return query, setof record, and a ...
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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 ...
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How to access the number of rows accumulated by RETURNs in PL/pgSQL

When performing RETURN QUERY ... in a PL/pgSQL function, is it possible afterwards to directly access the number of rows accumulated into the pile of records, which are returned when the function ...
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Special syntax sth.name() in the CREATE FUNCTION statement, what does it mean?

In this SO question about stored procedures in plpgsql, the stored procedure look like sth.name(). I don't know what is the meaning of the prefix sth. For example: create or replace function ...
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Recursive query using plpgsql

I'm trying to write a plpgsql function that recursively returns a set of columns from records in a tree structure. I have a data table and a table to link the data together: DATATABLE ----------- id ...
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722 views

Difference between return next and return record

What is the difference between RETURN NEXT and RETURN RECORD in PL/pgSQL? I find the manual quite confusing in explaining what RETURN RECORD actually does. What is a RECORD type?
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1answer
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returning set of records in stored procedure

I would like to return a set of records from a pl/pgsql. Is there a way to do that without using the "for" construct and cursors? For instance when I compared these two stored procedures: create or ...
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1answer
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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; ...
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String handling in postgres 8.4

This started as a question about indexes, but then when I got my answer I realized I would have to try and convert the answer into 8.4 syntax (I can't believe that format does not exist). I thought I ...
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1answer
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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 ...
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1answer
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PostgreSQL 8.4: How to tell if a procedural language is installed or not?

I have a setup program that requires plpgsql to install stored procedures in a PostgreSQL 8.4 database. I need to make sure the language is installed or the app will fail. I don't want to drop the ...
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Interactive INSERT / UPDATE function to implement UPSERT

I have a function in PostgreSQL 9.1 that I want client applications to be passing a record object and the function will detect if it's an insert or an update and return the operation done, i.e "1 ...
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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 ...
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Save output from multiple SQL SELECT commands to a file

Within a Postgres function I would like to run a number of SQL SELECT commands and append the output to the same variable. After all the SELECT commands have run this output should be written to a ...
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1answer
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PostgreSQL Return Joined Results of Select

I'm learning PostgreSQL and was wondering if I can put long selects in stored procedures like this one: CREATE OR REPLACE FUNCTION api.book_list() RETURNS TABLE ( id BIGINT, published ...
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1answer
784 views

Distinguish between schema and database

I had the error cross-database references are not implemented: scan.location.alias with this PL/pgSQL code: DECLARE v_tmp_host scan.location.alias%TYPE; v_ip_address character varying; BEGIN ...
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1answer
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Check what event called the trigger on PostgreSQL?

I'm trying to check what event called my trigger, like INSERT, UPDATE or DELETE. Oracle triggers can check this in a simple 'IF' statement: IF INSERTING, IF UPDATING or even IF DELETING Is there a ...
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1answer
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Getting a random row from PostgreSQL?

I want to get a random row from my table by id. My table: ID|Word |Dificult|Category_id| 1 |'Dumb' |'Easy' | 3 | 2 |'Leopard'|'Medium'| 6 | If my user selects a category and ...
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Running a CTE query in a loop using PL/PGSQL [duplicate]

Possible Duplicate: Running a CTE query in a loop using PL/pgSQL (Cross-post from http://stackoverflow.com/q/12625914/1555778) I'm trying to execute query that is repeatedly called in a ...
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2answers
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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 ...
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PostgreSQL procedural languages - differences between PL/pgSQL and SQL

Can anybody please summarize the differences between: http://www.postgresql.org/docs/9.1/static/xfunc-sql.html and http://www.postgresql.org/docs/9.1/static/plpgsql.html ? Main points: ...
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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 ...
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1answer
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PL/pgSQL function + client-side lo_import

I have a problem with importing documents into PostgreSQL. I have a plpgsql function, which simplified could look like this: create function add_file(flag integer, sth varchar) returns void as begin ...
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2answers
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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 ...
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2answers
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Dynamic access to record column in plpgsql function

How can I address a column from a record in a plpgsql function dynamically? In the following snippet I have access to a variable entity.colname that contains the column that should be checked in the ...
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1answer
605 views

Triggers not being run on a partitioned table

I'm using PostgreSQL. I have a table that I have partitioned into three sub-tables - and as far as I can tell, this all works correctly. Rows are correctly inserted into the appropriate partition and ...
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4answers
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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 ...
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Is there a simple way in PL/pgSQL to check if a query returned no result?

I'm currently experimenting a bit with PL/pgSQL and want to know if there is a more elegant way to do something like this: select c.data into data from doc c where c.doc_id = id and c.group_cur > ...
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4answers
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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 ...
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1answer
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Generate an exception with a Context

When PostgreSQL throws an exception, there is a line "CONTEXT" like: ERROR: INSERT has more target COLUMNS than expressions LINE 3: ... ...
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Postgres plpgsql - Using a variable inside of a dynamic create statement

Using Postgres pl/pgsql, I'm attempting to create a table using a dynamic EXECUTE command, such as: ... DECLARE tblVar varchar := "myTable"; BEGIN EXECUTE 'CREATE TABLE $1 ( foo ...
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Plpgsql seems to be deleting and inserting instead of updating - Why?

I am using postgreSQL 7.4. I have a large table , call it table_a: key1 INT NOT NULL, key2 INT NOT NULL, data INT NOT NULL, itstamp INT NOT NULL DEFAULT (date_part('EPOCH'::text, ...
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Trigger: move deleted rows to archive table

I have a small (~10 rows) table called restrictions in my PostgreSQL database, where values are deleted and inserted on a daily basis. I would like to have a table called restrictions_deleted, where ...
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5answers
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What are the differences between “Stored Procedures” and “Stored Functions”?

So a comment from this question mentions, that there is a slight difference in "Stored Procedrues" and "Stored Funtions" in PostgreSQL. The comment links to a wikipedia article but some of this don't ...
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Is there a good way to run a trigger for each record in a postgres table?

I have a system where I can't control the design of some tables (replicated via Slony-I), and so I have a series of what we refer to as 'shadow tables', where I extract some information out of the ...