plpgsql execute function

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

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

  Test environment: win2003 + postgresql8.3 (postgresql89.0 is not easy to use)   1. Create a database language 1. Open the Start Menu/Program/PostgreSQL 8.3/command prompt 2. Run the "createlang-u Postgres plpgsql S" command" For example,

PostgreSQL-based API Design本文档设计思想主要是用于简化API一些重复验证工作，同时固定API入口, 在入口中做请求分发， 以便在入口做一些统计工作以及请求次数限制.-- functionapi_interface(in jsonb, out jsonb); --入口函数(存储过程)api_interface_error(code); -- 统一错误处理函数api_interface_lines(user_id, params, team_id);

N-more SQL statements, but their own time, but everywhere is the pit ah, ah, ah!!!!!!!!!!!!!!!Want to write a get the latest ID value in the table.On the CodeCREATE TABLEDepartment (IDINT PRIMARY KEY not NULL, D_codeVARCHAR(

There are two tables: user and diff_user_list.   When the user table is added, deleted, modified, and queried, or a field changes, the field is inserted to the diff_user_list table.   The following code stores old records in the diff_user_list table

The time can be added and reduced directly in PostgreSQL: Query System Current Time: Select Now ();OrSelect Current_timestamp; SELECT now ():: Timestamp + ' 1 year '; --Current time plus 1 yearsSELECT now ():: Timestamp + ' 1 month '; --Current

Lang_name Code do executes an anonymous block of code, in other words, an anonymous function that executes once in a program language.A block of code is considered a function body with no parameters, and the return value type is void. Its parsing