问题描述
期待Postgresql中的等效代码,尤其是如何实现SAVE TRAN
,@@trancount
和@@error
。
CREATE PROCEDURE [APPLY_TRANSCO_CASH]
AS
BEGIN
DECLARE
@trancount int,@error int,@rowcount int,@ret int
SELECT @trancount = @@trancount
IF(@trancount <> 0)
BEGIN
SAVE TRAN tran_APPLY_TRANSC
END
ELSE
BEGIN
BEGIN TRAN tran_APPLY_TRANSC
END
UPDATE ELIOT_TMp
SET Country = 'v'
SELECT @error = @@error,@rowcount = @@rowcount
IF (@error <> 0)
BEGIN
SELECT @ret = -1
GOTO Error
END
SELECT @ret = @rowcount
GOTO normal_End
normal_End:
IF (@trancount=0)
BEGIN
COMMIT TRANSACTION
END
RETURN @ret
Error:
ROLLBACK TRANSACTION tran_APPLY_TRANSC
RETURN @ret
解决方法
假设save tran
建立了一个保存点,我认为这将是:
create procedure apply_transco_cash(inout retcode int)
AS
$$
begin
UPDATE eliot_tmp
SET Country = 'v';
-- this returns the number of affected rows
GET DIAGNOSTICS recode = ROW_COUNT;
commit;
exception
when others then
retcode := -1;
end;
$$
language plpgsql;
要处理错误,请在PL / pgSQL中使用exception block,它会自动建立一个隐式保存点(在这种情况下,从第一个begin
开始“覆盖”整个过程)。无需显式设置保存点(并且您无法在PL / pgSQL中回滚到保存点)
GET DIAGNOSTICS
is used检索受最后一条语句影响的行数。