plpgsql if

Today, a netizen asked PostgreSQL 9.0 how to debug functions in the group. I remember there was a plug-in named edb-debugger in 8.3 that could be used. there is no 9.0 database at hand, so I tested it and it could not be used at 9.1. The result is

Function Return Type Description Example Result array_append(anyarray,anyelement) Anyarray Append an element to the end of an array Array_append (array[1,2], 3) {A-i}

Http://www.postgresonline.com/journal/archives/201-Using-RETURNS-TABLE-vs.-OUT-parameters.html--http://www.postgresonline.com/journal/archives/201-using-returns-table-vs.-out-parameters.html--ver:9.3 Geovin Du Tu--returning a single record using SQL

Look at the pl/proxy, a lot of documents, as a reference bar, reprinted two of them, this is

1. The following Code creates a top100cur () function, which returns an anonymous cursor. -- Drop function top100cur (); Create Function top100cur () returns refcursor as $ declare ABC refcursor; beginopen ABC for select * From person limit 100;

Recently in the study of PostgreSQL, so also has a strong interest in pl/pgsql, so here is a little summary, first of all, this PL is procedure language shorthand, that is, the so-called "process language." A large part of the following is quoted

1. Return statementThere are three commands that can be used to return data from a function: RETURN RETURN NEXT RETURN QUERY 2. Return command syntax:RETURN RETURN expression;If you do not use the expression return command to

Symfoware Open System"DDL" (data definition Language)A data definition language that defines and manages the language of all objects in a SQL database. The main commands are create, alter, DROP, etc., the DDL is mainly used in the initialization of

  Author: icyriverSource: http://icyriver.net /? P = 176     PL/ProxyAndPostgreSQLThe structure relationship of the cluster can be clearly expressed. If you are not familiar with pL/proxy and PostgreSQL clusters, you can seeSkype plans for

PostgreSQL supports arrays, but does not have a function to sort internal data elements. Today I wrote one with PLPGSQL and PLPYTHONU respectively. Example Table Structure: t_girl # dtest_array; Tableytt. test_arrayColumn | Type | Modifiers --------