Sql Server 到 Oracle - 更改过程和查看语法

Question

我在 sql server 中有这个过程，它执行计算日期的逻辑并为应用程序返回此信息，但不幸的是我将不得不切换到 oracle 数据库，所以我希望你能帮助我了解我必须在语法上进行哪些更改.

P.S：没用过oracle数据库

CREATE PROCEDURE [dbo].[SP_ObterDadosApontamentosOperacional]
@dataInicio as dateTime = null,
@dataFim as datetime = null,
@embarcacaoId as varchar(50) = null

AS
BEGIN

if(@dataInicio is null)
begin
    set @dataInicio = DATEADD(day, DATEDIFF(day, 0, GETDATE()), 0)
end

if(@dataFim is null)
begin
    set @dataFim = (DATEADD(ms, -3, DATEADD(dd, DATEDIFF(dd, 0, GetDate()), 0)) +1)
end


select 
    codigoOperacao.Id           as 'Id',
    codigoOperacao.Descricao    as 'Descricao',
    codigoOperacao.Codigo       as 'CodigoOperacao',
    count(codigoOperacao.Codigo) as 'TotalUnitario'
into #parcial
from INFO_APONTAMENTO as apontamento
inner join CODIGOS_OPERACAO as codigoOperacao on codigoOperacao.Id = apontamento.CodigosDeOperacao_Id
where apontamento.DataCadastro between @dataInicio and @dataFim
and ((apontamento.Barco_Id = @embarcacaoId) or @embarcacaoId is null)

group by
    codigoOperacao.Codigo,
    codigoOperacao.Descricao,
    codigoOperacao.Id   


/*--------------------------------------------*/

   select 
        Id,
        Descricao,
        CodigoOperacao  ,
        DataInicio  ,   
        DataTermino ,
    DATEDIFF(MINUTE,DataInicio,DataTermino)
    into #tempApontamentosPorHora
    from #tempApontamentos
    where DataInicio is not null
    and DataTermino is not null

declare @somaTotal as int = (select     sum(totalUnitario) from #parcial)
select *, @somaTotal as TotalAgregado from #parcial

结束

Answer 1

如果您查看 Oracle SQL Developer，它内置了一个翻译器。

这是它尝试对您的 T-SQL 执行的操作

/*Global Temporary Tables:2 *//* Translation Extracted DDL For Required Objects*/
CREATE GLOBAL TEMPORARY TABLE tt_parcial
AS (
   SELECT codigoOperacao.Id Id  ,
   codigoOperacao.Descricao Descricao  ,
   codigoOperacao.Codigo CodigoOperacao  ,
   0  TotalUnitario  
     FROM INFO_APONTAMENTO apontamento
     JOIN CODIGOS_OPERACAO codigoOperacao   ON codigoOperacao.Id = apontamento.CodigosDeOperacao_Id
   WHERE 1=2
);
/
CREATE GLOBAL TEMPORARY TABLE tt_tempApontamentosPorHora
AS (
   SELECT Id ,
   Descricao ,
   CodigoOperacao ,
   DataInicio ,
   DataTermino ,
   utils.datediff('MINUTE', DataInicio, DataTermino) 
     FROM tt_tempApontamentos
   WHERE 1=2
);
/



CREATE OR REPLACE PROCEDURE SP_ObterDadosApontamentosOperacional
(
  iv_dataInicio IN DATE DEFAULT NULL ,
  iv_dataFim IN DATE DEFAULT NULL ,
  v_embarcacaoId IN VARCHAR2 DEFAULT NULL 
)
AS
   v_dataInicio DATE := iv_dataInicio;
   v_dataFim DATE := iv_dataFim;
   v_somaTotal NUMBER(10,0) := ( SELECT SUM(totalUnitario)  
     FROM tt_parcial  );
   v_cursor SYS_REFCURSOR;

BEGIN
   IF ( v_dataInicio IS NULL ) THEN

   BEGIN
      v_dataInicio := utils.dateadd('DAY', utils.datediff('DAY', 0, SYSDATE), 0) ;

   END;
   END IF;
   IF ( v_dataFim IS NULL ) THEN

   BEGIN
      v_dataFim := (utils.dateadd('MS', -3, utils.dateadd('DD', utils.datediff('DD', 0, SYSDATE), 0)) + 1) ;

   END;
   END IF;
   DELETE FROM tt_parcial;
   UTILS.IDENTITY_RESET('tt_parcial');

   INSERT INTO tt_parcial ( 
    SELECT codigoOperacao.Id Id  ,
           codigoOperacao.Descricao Descricao  ,
           codigoOperacao.Codigo CodigoOperacao  ,
           COUNT(codigoOperacao.Codigo)  TotalUnitario  
      FROM INFO_APONTAMENTO apontamento
             JOIN CODIGOS_OPERACAO codigoOperacao   ON codigoOperacao.Id = apontamento.CodigosDeOperacao_Id
     WHERE  apontamento.DataCadastro BETWEEN v_dataInicio AND v_dataFim
              AND ( ( apontamento.Barco_Id = v_embarcacaoId )
              OR v_embarcacaoId IS NULL )
      GROUP BY codigoOperacao.Codigo,codigoOperacao.Descricao,codigoOperacao.Id );
   /*--------------------------------------------*/
   DELETE FROM tt_tempApontamentosPorHora;
   UTILS.IDENTITY_RESET('tt_tempApontamentosPorHora');

   INSERT INTO tt_tempApontamentosPorHora ( 
    SELECT Id ,
           Descricao ,
           CodigoOperacao ,
           DataInicio ,
           DataTermino ,
           utils.datediff('MINUTE', DataInicio, DataTermino) 
      FROM tt_tempApontamentos 
     WHERE  DataInicio IS NOT NULL
              AND DataTermino IS NOT NULL );
   OPEN  v_cursor FOR
      SELECT * ,
             v_somaTotal TotalAgregado  
        FROM tt_parcial  ;
      DBMS_SQL.RETURN_RESULT(v_cursor);

EXCEPTION WHEN OTHERS THEN utils.handleerror(SQLCODE,SQLERRM);
END;

我并不是说这是您的理想答案或什至是答案，但该功能可以帮助您快速开始。

从 SQL Server 到 Oracle 的一件大事 - 我看到的很多 SQL Server 存储过程只是要运行的查询。

Oracle 存储过程不只是设置为“愚蠢”的 SQL 语句。它的目的是处理数据。因此，如果您不想改变行为，您必须做的一件事是，您的应用程序需要获取过程的结果，没有运行代码，在使用 PL/SQL 时获取查询结果。

这在12c and higher versions of Oracle where we have added support for implicit results 中要容易一些，但您必须添加对 DBMS_SQL.RETURN_RESULT 的调用才能获取它们。