sql函数创建

语法：

CREATE [OR REPLACE] FUNCTION function_name (arguments)   
RETURNS return_datatype AS $variable_name$  
  DECLARE  
    declaration;  
    [...]  
  BEGIN  
    < function_body >  
    [...]  
    RETURN { variable_name | value }  
  END; LANGUAGE plpgsql;

参数说明

• function_name：指定函数的名称。
• [OR REPLACE]：是可选的，它允许您修改/替换现有函数。
• RETURN：它指定要从函数返回的数据类型。它可以是基础，复合或域类型，或者也可以引用表列的类型。
• function_body：function_body包含可执行部分。
• plpgsql：它指定实现该函数的语言的名称

#时间函数
CREATE OR REPLACE FUNCTION "public"."addtime"(difftype varchar, incrementvalue int4, inputdate timestamptz)
  RETURNS "pg_catalog"."timestamp" AS $BODY$
        DECLARE
           YEAR_CONST Char(15) := ‘year‘;
           MONTH_CONST Char(15) := ‘month‘;
           WEEK_CONST Char(15) := ‘week‘;
           DAY_CONST Char(15) := ‘day‘;
           HOUR_CONST Char(15) := ‘hour‘;
           MIN_CONST Char(15) :=‘mi‘;
           SECOND_CONST Char(15) :=‘ss‘;
           dateTemp timestamp;
           intervals interval;
        BEGIN
           IF lower($1) = lower(YEAR_CONST) THEN
               select cast(cast(incrementvalue as character varying) || ‘ year‘ as interval) into intervals;
           ELSEIF lower($1) = lower(MONTH_CONST) THEN
               select cast(cast(incrementvalue as character varying) || ‘ months‘ as interval) into intervals;
           ELSEIF lower($1) = lower(WEEK_CONST) THEN
               select cast(cast(incrementvalue as character varying) || ‘ week‘ as interval) into intervals;
           ELSEIF lower($1) = lower(DAY_CONST) THEN
               select cast(cast(incrementvalue as character varying) || ‘ day‘ as interval) into intervals;
           ELSEIF lower($1) = lower(HOUR_CONST) THEN
               select cast(cast(incrementvalue as character varying) || ‘ hour‘ as interval) into intervals;
           ELSEIF lower($1) = lower(MIN_CONST) THEN
               select cast(cast(incrementvalue as character varying) || ‘ minute‘ as interval) into intervals;
           ELSEIF lower($1) = lower(SECOND_CONST) THEN
               select cast(cast(incrementvalue as character varying) || ‘ second‘ as interval) into intervals;
           END IF;

           dateTemp:= inputdate + intervals;

           RETURN dateTemp;
        END;
        $BODY$
  LANGUAGE ‘plpgsql‘ VOLATILE COST 100
;

CREATE OR REPLACE FUNCTION "public"."end_purchase_price"(refcursor)
  RETURNS "pg_catalog"."refcursor" AS $BODY$
begin 
    open $1 for 
        SELECT  p1.name_template,p2.material,p2.cust_spec,p0.price_unit::double precision,p3.name
            FROM purchase_origin_line p0 
            LEFT JOIN product_product  p1 ON  p0.product_id=p1.id
            LEFT JOIN product_template  p2 ON p1.product_tmpl_id=p2.id
            LEFT JOIN product_uom p3 ON  p2.uom_id=p3.id
            WHERE    p2.active =‘t‘ AND p0.id IN ( SELECT MAX(id)
            FROM purchase_origin_line
            where  state<>‘cancel‘ AND product_id >0
            GROUP BY product_id
            );
return $1;
end;
$BODY$
  LANGUAGE ‘plpgsql‘ VOLATILE COST 100
;

CREATE OR REPLACE FUNCTION "public"."prod_line_zd"( refcursor, gsid int4, sd varchar, ed varchar, gxstateid int4, workname varchar, lotname varchar, ename varchar, pname varchar, pgg varchar, gxname varchar)
  RETURNS "pg_catalog"."refcursor" AS $BODY$ 
BEGIN 
if gxstateid=3 then
    open $1 for EXECUTE‘
    select t2.sequence,to_char(timeadd(‘‘hour‘‘,8,t1.date),‘‘yyyy-mm-dd‘‘),t3.name_template,t4.material,t4.cust_spec,t0.name workname,t5.name lotname,t2.lqty_ok,t2.lkgweight,t2.lqty,t2.lqty_no,t7.login,t8.name,t6.sequence,t6.name,t6.produce_description,case t2.lstate when 1 then ‘‘领‘‘ else ‘‘交‘‘ end,t1.name,t9.name_template,t9.cust_spec,t2.lremark  from mrp_production t0
        left join mrp_production_report t1 on t0.id=t1.workname
        left join mrp_production_report_line t2 on t1.id=t2.line_id and t0.id=t2.lworkname
        left join product_product t3 on t0.product_id=t3.id
        left join product_template t4 on t3.product_tmpl_id=t4.id
        left join mrp_production_report_lot t5 on t5.id=t2.lot_id
        left join mrp_routing_workcenter t6 on t6.id=t2.lprocedure
        left join res_users t7 on t7.id=t2.lemployee
        left join res_partner t8 on t8.id=t7.partner_id
        left join (select t0.id,t2.name_template,t3.material,t3.cust_spec from mrp_bom t0 left join mrp_bom_line t1 on t0.id=t1.bom_id 
                                        left join product_product t2 on t1.product_id=t2.id
                                        left join product_template t3 on t3.id=t2.product_tmpl_id)t9 on t9.id=t0.bom_id
        where t0.company_id=‘|| gsid ||‘ and timeadd(‘‘hour‘‘,8,t1.date)>=‘‘‘|| sd ||‘‘‘ and timeadd(‘‘hour‘‘,8,t1.date)<=‘‘‘|| ed ||‘‘‘ and exists(select 1 from mrp_production_report where workname=t0.id) and t0.state<>‘‘cancel‘‘
            and t0.name like ‘‘%‘|| workname ||‘%‘‘ and t5.name like ‘‘%‘|| lotname ||‘%‘‘ and t8.name like ‘‘%‘|| ename ||‘%‘‘ and t3.name_template like ‘‘%‘|| pname ||‘%‘‘ and t4.cust_spec like ‘‘%‘|| pgg ||‘%‘‘and t6.name like ‘‘%‘|| gxname ||‘%‘‘ order by t1.date,t1.name,t2.sequence;‘;
ELSE
  open $1 for EXECUTE‘
    select t2.sequence,to_char(timeadd(‘‘hour‘‘,8,t1.date),‘‘yyyy-mm-dd‘‘),t3.name_template,t4.material,t4.cust_spec,t0.name workname,t5.name lotname,t2.lqty_ok,t2.lkgweight,t2.lqty,t2.lqty_no,t7.login,t8.name,t6.sequence,t6.name,t6.produce_description,case t2.lstate when 1 then ‘‘领‘‘ else ‘‘交‘‘ end,t1.name,t9.name_template,t9.cust_spec,t2.lremark  from mrp_production t0
        left join mrp_production_report t1 on t0.id=t1.workname
        left join mrp_production_report_line t2 on t1.id=t2.line_id and t0.id=t2.lworkname
        left join product_product t3 on t0.product_id=t3.id
        left join product_template t4 on t3.product_tmpl_id=t4.id
        left join mrp_production_report_lot t5 on t5.id=t2.lot_id
        left join mrp_routing_workcenter t6 on t6.id=t2.lprocedure
        left join res_users t7 on t7.id=t2.lemployee
        left join res_partner t8 on t8.id=t7.partner_id
        left join (select t0.id,t2.name_template,t3.material,t3.cust_spec from mrp_bom t0 left join mrp_bom_line t1 on t0.id=t1.bom_id 
                                        left join product_product t2 on t1.product_id=t2.id
                                        left join product_template t3 on t3.id=t2.product_tmpl_id)t9 on t9.id=t0.bom_id
        where t0.company_id=‘|| gsid ||‘ and timeadd(‘‘hour‘‘,8,t1.date)>=‘‘‘|| sd ||‘‘‘ and timeadd(‘‘hour‘‘,8,t1.date)<=‘‘‘|| ed ||‘‘‘ and t2.lstate=‘|| gxstateid ||‘  and exists(select 1 from mrp_production_report where workname=t0.id) and t0.state<>‘‘cancel‘‘
            and t0.name like ‘‘%‘|| workname ||‘%‘‘ and t5.name like ‘‘%‘|| lotname ||‘%‘‘ and t8.name like ‘‘%‘|| ename ||‘%‘‘ and t3.name_template like ‘‘%‘|| pname ||‘%‘‘ and t4.cust_spec like ‘‘%‘|| pgg ||‘%‘‘and t6.name like ‘‘%‘|| gxname ||‘%‘‘ order by t1.date,t1.name,t2.sequence;‘;
end if;
return $1;
END; 
$BODY$
  LANGUAGE ‘plpgsql‘ VOLATILE COST 100
;