在PostgreSQL中编写返回修改后row类型的函数的方法如下: 创建一个带有返回类型为ROW的函数。可以使用CREATE FUNCTION语句来定义函数,并在RETURNS子句中指定返回类型为ROW。例如: 代码语言:txt 复制 CREATE FUNCTION update_row_type_function(id INTEGER, name TEXT) RETURNS ROW(id INTEGER, name TEXT) AS $$ DECLAR...
rowtype在使用过程中要求传入的字段结构排列顺序与所引用的表结构完全一致,否则会出现值传入错误。参考下面代码中v_list的数据传入方式table的结果返回通过return next实现,所以需要在存储过程中每返回一条记录的时候就需要return next一次,不可以完全依赖最后的return create or replace function public.sf_get_polyline_t...
ERROR: set-valued function called in context that cannot accept a set CONTEXT: PL/pgSQL function func04() line 7 at RETURN NEXT 解决: If you call your set-returning function the wrong way (IOW the way you might normally call a function), you will get this error message: Set-valued fu...
Server给出的示例如下: CREATE FUNCTION ProductsCostingMoreThan(@cost money) RETURNS TABLE AS RETURN SELECT ProductID, UnitPrice FROM Products WHERE UnitPrice > @cost 因此,行值函数看起来可能类似于(我想): CREATE FUNCTION 浏览3提问于2020-12-08得票数 0 回答已采纳 2回答 update_or_create前面的...
CREATE FUNCTION foo() RETURNS SETOF my_view AS ... Else, spell the column definition list with out with (simplest) RETURNS TABLE: CREATE FUNCTION foo() RETURNS TABLE (col1 int, col2 text, ...) AS ... If you are making the row type up as you go, you can return anonymous rec...
4|04. RETURN QUERY命令 4|1语法: RETURNQUERY query;RETURNQUERYEXECUTEcommand-string[USING expression [, ...]]; 4|24.1 RETURN QUERY命令 将一条查询的结果追加到一个函数的结果集中。 CREATEORREPLACEFUNCTIONgetAllFoo2()RETURNSSETOF fooAS$$DECLAREr foo%rowtype;BEGINRETURNQUERYSELECT*FROMfooWHEREfooid...
4|04. RETURN QUERY命令 4|1语法: RETURNQUERY query;RETURNQUERYEXECUTEcommand-string[USING expression [, ...]]; 4|24.1 RETURN QUERY命令 将一条查询的结果追加到一个函数的结果集中。 CREATEORREPLACEFUNCTIONgetAllFoo2()RETURNSSETOF fooAS$$DECLAREr foo%rowtype;BEGINRETURNQUERYSELECT*FROMfooWHEREfooid...
RETURN total; END; $total$LANGUAGE plpgsql; 1. 2. 3. 4. 5. 6. 7. 8. 9. 当执行上述查询时,输出将是- testdb# CREATE FUNCTION 1. 现在,让无涯教程执行对该函数的调用,并检查COMPANY表中的记录 testdb=# select totalRecords(); 1. ...
FOR EACH ROW EXECUTE FUNCTION set_created_at(); CREATE OR REPLACE FUNCTION set_created_at() RETURNS TRIGGER AS $$ BEGIN NEW.created_at = NOW(); RETURN NEW; END; $$ LANGUAGE plpgsql; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
"geometry" AS $BODY$ DECLARE BEGIN IF st_srid(geom) != '4490' THEN RETURN null; end if; return geoc_wgs84togcj02(st_transform(st_setsrid(geom,4490),4326)); END; $BODY$ LANGUAGE plpgsql VOLATILE COST 100; CREATE OR REPLACE FUNCTION "public"."geoc_delta"("lon" numeric, "lat" ...