old.id:%. new.id:%', TG_NAME, OLD.id, NEW.id; return null; end; language plpgsql; CREATE FUNCTION postgres=# create trigger tg1 before update ON t_ret for each row execute PROCEDURE tg_t_ret(); CREATE TRIGGER postgres=# create trigger tg2 before update ON t_ret for each row exe...
DROP procedure IF EXISTS `getGameName`;#删除储存过程#注意参数名不能与字段名相同DELIMITER $$CREATE PROCEDURE getGameName( IN gameid INT, #入参 OUT g_name VARCHAR(45), #出参 OUT pin_yin VARCHAR(45)) #出参BEGIN SELECT g 存储过程 SQL MySQL sql server 存储过程定义变量 sql 存储过程语句 ...
CATALOG(pg_proc,1255)BKI_BOOTSTRAPBKI_ROWTYPE_OID(81)BKI_SCHEMA_MACRO37{38NameData proname;/* procedure name */39Oid pronamespace;/* OID of namespace containing this proc */40Oid proowner;/* procedure owner */41Oid prolang;/* OID of pg_language entry */42float4 procost;/* estimat...
dbms_output.put_line('IN: v_var2 :'||v_var2); END; -- dbms_output.put_line('IN: v_var2 :'||v_var2); 内部块中的变量不能被外部块使用. 去掉注释则报错 end; /输出结果: OUT: v_var1 :123 IN: v_var1 :123 IN: v_var2 :456PL/SQL procedure successfully completed. 语句块的...
在PostgreSQL 中,除了标准 SQL 语句之外还支持使用各种过程语言(例如 PL/pgSQL、C、PL/Tcl、PL/Python、PL/Perl、PL/Java 等 )创建复杂的过程和函数,称为存储过程(Stored Procedure)和自定义函数(User-Defined Function)。存储过程支持许多过程元素,例如控制结构、循环和复杂的计算。 使用存储过程带来的好处包括: ...
EXECUTE PROCEDURE func_name ( arguments ) CREATE TYPE 定义一个新的数据类型。 CREATE TYPE name AS ( attribute_name data_type [, ... ] ) CREATE TYPE name ( INPUT = input_function, OUTPUT = output_function [, RECEIVE = receive_function ] ...
CREATE TRIGGER name { BEFORE | AFTER } { event [ OR ... ] } ON table [ FOR [ EACH ] { ROW | STATEMENT } ] EXECUTE PROCEDURE func_name ( arguments )CREATE TYPE定义一个新的数据类型。CREATE TYPE name AS ( attribute_name data_type [, ... ] ) CREATE TYPE name ( INPUT = input...
SQL函数的主体必须是一个有分号(;)分隔的SQL语句的列表。SQL函数被声明返回void,最后一个语句必须是一个SELECT或者一个带有RETURNING子句的INSERT、UPDATE、DELETE。SQL函数的返回类型可以通过SETOF xx 或者RETURNSTABLE() 方式声明返回一个集合(多个行) SQL函数的参数 ...
*/ObjectAddressProcedureCreate(constchar*procedureName, Oid procNamespace,boolreplace,boolreturnsSet, Oid returnType, Oid proowner, Oid languageObjectId, Oid languageValidator,constchar*prosrc,constchar*probin,charprokind,boolsecurity_definer,boolisLeakProof,boolisStrict,charvolatility,charparallel, ...
postgres=# \h create event Command: CREATE EVENT TRIGGER Description: define a new event trigger Syntax: CREATE EVENT TRIGGER name ON event [ WHEN filter_variable IN (filter_value [, ... ]) [ AND ... ] ] EXECUTE PROCEDURE function_name() 目前事件触发器,支持的command tag如下 首先要创...