select count(*) into v_count from freetopolice where name=p_name; into也是赋值给游标的意思 if v_count >0 then GET DIAGNOSTIC语句用于获取前面执行的 SQL 语句的相关信息,常用于获取影响行数 GET DIAGNOSTICS v_rowcount := ROW_COUNT; RAISE EXCEPTIO
GET DIAGNOSTICS v_column = ROW_COUNT; v_endtime:=to_char(now(),'yyyy/mm/dd hh24:mi:ss'); insert into T_LOG(pro_name,tj_date,begin_time,end_time,err_infor,run_result,v_sql,sql_count) values(pro_name,p_date,v_begintime,v_endtime,v_sqlerrm,'Y',v_sql,v_column); -- 统计...
AND deptype ='a'; GET DIAGNOSTICS count = ROW_COUNT; IF count < 1 THEN RAISE EXCEPTION'no linked sequence found'; ELSIF count > 1 THEN RAISE EXCEPTION'more than one linked sequence found'; END IF; -- drop the default EXECUTE'ALTER TABLE '|| tbl ||' ALTER COLUMN '|| quote_ident(...
结构类似: declare v_cnt integer; begin update ... -- 执行更新语句 where ...; -- 这里的条件是存在的判断条件 get diagnostics v_cnt = row_count; -- 将影响行数的值赋给v_cnt if v_cnt = 0 then insert into ...; -- 执行插入语句 end if; end; 本文标题:关于postgresql判断的信息 文章U...
BEGIN LOOP UPDATE your_table SET column1 = new_value1, column2 = new_value2 FROM ( SELECT id, new_value1, new_value2 FROM your_update_source ORDER BY id LIMIT batch_size OFFSET offset ) AS t WHERE your_table.id = t.id; GET DIAGNOSTICS offset = ROW_COUNT; EXIT WHEN offset = 0...
GET DIAGNOSTICS捕获运行过程中的状态值 There are several ways to determine the effect of a command. The first method is to use the GET DIAGNOSTICS command, which has the form: GET [ CURRENT ] DIAGNOSTICS variable { = | := } item [ , ... ]; GET DIAGNOSTICS integer_var = ROW_COUNT;...
PL/pgSQL提供了两种方法来检查一个命令的执行结果。第一种方法是使用GET DIAGNOSTICS命令。它的形式如下: GET DIAGNOSTICS variable = item [ , ... ]; 1. 其中的item可以是ROW_COUNT和RESULT_OID。ROW_COUNT表示上一条SQL命令处理的数据行的个数。RESULT_OID表示最近的SQL命令插入的最后一个数据行的OID。varia...
get diagnostics v_cnt = row_count; -- 将影响行数的值赋给v_cnt if v_cnt = 0 then insert into ...; -- 执行插入语句 end if; end; postgrepsql如何取消之前的更新操作 1、首先PostgreSQL是一款开源的数据库管理系统。 2、其次取消之前的更新操作需要关闭PostgreSQL。
对于merge into语法的转换,在ADB for PG中先使用update进行更新,然后使用GET DIAGNOSTICS rowcount := ROW_COUNT;语句获取update更新的行数,如果update更新的行数为0,那么再使用insert语句进行插入。 MERGE INTO test1 t1 USING (SELECT t2.col1 col1, t3.col2 col2, FROM test2 t2, test3 t3) S ON S....
ROW_COUNT=0; 表的returning 取真正被操作的行的最终数据. 视图的returning 取最后一个instead of for each row触发器函数的返回值. FOUND和ROW_COUNT的用法如下 : There are several ways to determine the effect of a command. The first method is to use the GET DIAGNOSTICS command, which has the for...