从光标插入表格

Question

嗨，我正尝试从游标插入记录，并尝试将记录插入表中。 在下面找到我的代码。 我创建代码以在不同的依赖表中插入。 但是现在，第二个循环将进入无限循环。 它没有退出循环。 请在下面找到代码。

CREATE OR REPLACE FUNCTION save_meta_data_test3()
  RETURNS text AS
$BODY$
DECLARE 
     section_seq integer;
     step_seq integer;
     rec_section   RECORD;
     rec_step RECORD;
     i integer;

     cur_section CURSOR 
         FOR select 
                     line_item->>'sectionName' as sectionName,line_item->>'sectionLabel' as sectionLabel,to_number(line_item->>'sectionOrder','99G999D9S') as sectionOrder,line_item->>'outOfScopeSection' as outOfScopeSection,
                     line_item->>'punchListSection' as punchListSection 
                from tbl d,
                         json_array_elements(d.j->'sectionElements') l,
                         json_array_elements(l->'sectionElement') AS line_item
               where tbl_id=3;

     cur_step CURSOR 
               FOR select 
                     line_item2->>'stepName' as stepName,line_item2->>'stepLabel' as stepLabel,to_number(line_item2->>'stepOrder','99G999D9S') as stepOrder,line_item2->>'questionLevelChange',
                     line_item2->>'punchListSection'
               from tbl d,
                        json_array_elements(d.j->'sectionElements') l,
                        json_array_elements(l->'sectionElement') AS line_item,
                        json_array_elements(line_item->'stepElements') AS line_item1,
                        json_array_elements(line_item1->'stepElement') AS line_item2
               where tbl_id=3 ;
BEGIN
 i:=0;
   -- Open the cursor
     OPEN cur_section;

      LOOP
    -- fetch row into the film

        raise notice '%', i;
        i:=i+1;
        FETCH cur_section INTO rec_section;
          raise notice 'section insert';
    -- build the output
          select nextval('checklist_section_id_seq') into section_seq;
          insert into Dummy_section_details(bfs_section_id,bfs_section_name,bfs_section_label,section_order) 
          values(section_seq,rec_section.sectionName,rec_section.sectionLabel,rec_section.sectionOrder);

        OPEN cur_step;
            LOOP
                 FETCH cur_step INTO rec_step;

                    raise notice 'step insert';
                select nextval('ckschema.checklist_step_id_seq') into step_seq;

                Insert into dummy_steps_details(bfs_step_id,bfs_step_name,bfs_step_label,bfs_section_id,step_order)
                    values(step_seq,rec_step.stepName,rec_step.stepLabel,section_seq,rec_step.stepOrder);

                    raise notice 'after step insert';

           EXIT WHEN NOT FOUND;  
        END LOOP;     
         -- LOOP

        CLOSE cur_step;
         raise notice 'after section insert';

     EXIT WHEN NOT FOUND;
   END LOOP;

   -- Close the cursor
   CLOSE cur_section;

   RETURN cur_section.sectionName;
END; $BODY$
  LANGUAGE plpgsql VOLATILE
  COST 100;

任何人都可以帮忙。

Answer 1

我有一个与此任务相似的任务。 我浏览了该表，从游标中获取了值，并写入了另一个具有新ID的表。

 generate_id() - for generate new unique id; table_source - table where we take the vale; table_target - table where we write down; 

然后，我们使用游标创建函数并保存所需的内容：

CREATE OR REPLACE FUNCTION rewrite_data()
RETURNS void AS
$func$
DECLARE
curs CURSOR FOR SELECT * FROM table_source;
newId long;
BEGIN
FOR row IN curs LOOP

newId = generate_id();
INSERT INTO table_target(id, name, date, other)
VALUES (newId, row.name, row.date, row.other);

END LOOP;
END;
$func$ LANGUAGE plpgsql^
SELECT rewrite_data()^

希望这篇文章对以后的人有所帮助。