CREATE FUNCTION defines a new function. CREATE OR REPLACE FUNCTION will either create a new function, or replace an existing definition. To be able to define a function, the user must have the USAGE privilege on the language. If a schema name is...
Oid oid;/* oid *//* Language name */NameData lanname;/* Language's owner */Oid lanownerBKI_DEFAULT(PGUID);/* Is a procedural language */bool lanisplBKI_DEFAULT(f);/* PL is trusted */bool lanpltrustedBKI_DEFAULT(f);/* Call handler, if it's a PL */Oid lanplcallfoidBKI_DEFAU...
Only the functions compatible with PostgreSQL or those with thePACKAGEattribute can be overloaded. AfterREPLACEis specified, a new function is created instead of replacing a function if the number of parameters, parameter type, or return value is different. You can use theSELECTstatement to specify...
PostgreSQL ... CREATE DATABASE - 创建一个新数据库CREATE FUNCTION-定义一个新函数CREATE GROUP - 创建一 … pgsqldb.org|基于21个网页 3. 创建用户定义函数 SQL Server常用语句 -... ... DROP DEFAULT 删除默认值。CREATE FUNCTION创建用户定义函数。 DROP FUNCTION 删… ...
In PostgreSQL, the database objects are created using the CREATE command. In this write-up, we will discuss how to use the Postgres “CREATE” command for Table, View, Sequence, INDEX, Function, and Tablespace Creation. Case 1: Use the CREATE Command For Table Creation ...
下列ESQL 程式碼示範如何定義及呼叫 PostgreSQL 儲存程序: DECLARE inputParm CHARACTER; DECLARE outputParm CHARACTER; DECLARE inputOutputParm CHARACTER; SET inputParam = 'Hello'; SET inputOutputParam = 'World'; CALL swapParms(inputParm, outputParm, inputOutputParm); CREATE PROCEDURE swapParms(IN parm1...
--定义临时function,用于导出到mysql add jar /opt/local/hive/lib/hive-contrib-2.3..jar; add jar /opt/local/hive/lib/mysql-connector-java-5.1.-bin.jar; CREATE TEMPORARY FUNCTION dboutput AS 'org.apache.hadoop.hive.contrib.genericudf.example.GenericUDFDBOutput'; ...
Traditionally PostgreSQL has provided all the means to write functions (which were often simply called “stored procedures”). However, in a function you cannot really run transactions - all you can do is to use exceptions, which are basically savepoints. Inside a function, you cannot just ...
PostgreSQL- How to Create Database using Command Line In order to create a database, the PostgreSQL server must be up and running. The syntax to create database is: CREATE DATABASE database_name; There are many options you can use while creating a database. ...
In PostgreSQL 9.1, this feature exists. You can simply add IF NOT EXISTS to the CREATE TABLE statement: CREATETABLEIFNOTEXISTStable_name(column_name data_type); For earlier versions, one workaround is to use a function. But if you are creating a function to create a table if it doesn’...