最后明确RETURN声明不要求有工作的时候（但允许）OUT参数或RETURNS TABLE（使隐式使用的OUT参数）。round(...
CREATE[ORREPLACE]FUNCTIONname([[argmode][argname]argtype[{DEFAULT|=}default_expr][,...]])[RETURNSrettype|RETURNSTABLE(column_name column_type[,...])]{LANGUAGElang_name|TRANSFORM{FORTYPEtype_name}[,...]|WINDOW|IMMUTABLE|STABLE|VOLATILE|[NOT]LEAKPROOF|CALLEDONNULLINPUT|RETURNSNULLONNULLINPUT|...
这是postgresql官方推荐的返回结果集的形式,当你查阅postgresql官方文档的时候,你会看到的就是这种形式。如果采用这种形式,你的function代码看起来会像这样:CREATE OR REPLACE FUNCTION function1 () RETURNS setof table1 AS $body$ DECLARE result record; BEGIN for result in select * from table1 loop return n...
方法3CREATE OR REPLACE FUNCTION execute(filter varchar(36)) RETURNS TABLE (id varchar(36), name varchar(200)) AS $$ BEGIN RETURN QUERY EXECUTE 'SELECT id,name FROM dept where id = $1;' USING filter; END; $$ LANGUAGE PLPGSQL; CREATE OR REPLACE FUNCTION execute(filter varchar(36),filter...
CREATE OR REPLACE FUNCTION word_frequency(_max_tokens int)RETURNS TABLE (txt text -- also ...
[ ONLY ] table_name [ * ] [ [ AS ] alias [ ( column_alias [, ...] ) ] ] ( select ) [ AS ] alias [ ( column_alias [, ...] ) ] function_name ( [ argument [, ...] ] ) [ AS ] alias [ ( column_alias [, ...] | column_definition [, ...] ) ] function_name...
postgresql PL/pgSQL return setof和TABLE的区别 在pg中,广泛的使用了表函数代替视图,返回集合有两种定义,setof和table。他们的区别在于table明确定义了字段名和类型,如下: CREATE FUNCTION events_by_type_1(text) RETURNS TABLE(id bigint, name text) AS $$...
CREATE FUNCTION part_trig()RETURNS trigger LANGUAGEplpgsql AS $$ BEGIN BEGIN /* try to create a tableforthe new partition */ EXECUTE format('CREATE TABLE %I (LIKE tab INCLUDING INDEXES)','tab_'||to_char(NEW.ts,'YYYYMMDD')); ...
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_time_seq(in_platnumber text, in_time text) --in_time '2018-02-21' returns table( id text, polyline text, timestamps...
CREATE FUNCTION dup(int) RETURNS TABLE(f1 int, f2 text) AS $$ SELECT $1, CAST($1 AS text) || ' is text' $$ LANGUAGE SQL; 其他语言函数实现: plpgsql(可参考: postgresql.org/docs/cur): CREATE OR REPLACE FUNCTION cs_fmt_browser_version(v_name varchar, v_version varchar) RETURNS varch...