Question

我想运行一个大的SELECT查询，该查询可以采用20个过滤条件，其中每个条件可以有多个值，也可以为NULL。

我目前的做法是根据我需要的过滤条件动态生成SQL查询。

但是，我正在重写asp.net中的所有内容，我正在尝试避免动态编写SQL查询。我尝试将其编程为表值参数，但它比旧方式运行多慢，我无法弄清楚原因。

我在这里拍脚吗？将多个参数传递给存储过程的最佳做法是什么？

这是TVP：

CREATE TYPE SpecTangoCandidatListe AS TABLE 
  (
    cboActifs BIT,  cboCrochet BIT, cboEtoile BIT,  cboExcl BIT,
    cboIntero BIT,  anses CHAR(5),  cegep CHAR(2),  tour TINYINT,
    chprog BIT, prog CHAR(5),   cpt BIT, decision CHAR(2),
    entente CHAR(1),    equiv CHAR(1),  autSej TINYINT,
    typCit TINYINT, [message] VARCHAR(10),      filter VARCHAR(50),
    sort VARCHAR(25),   dir VARCHAR(5)
  );

我将TVP作为@filter传递给存储过程：

ALTER PROCEDURE [dbo].[tango_api_candidats_liste]
    @filtre SpecTangoCandidatListe ReadOnly
AS
BEGIN
        SELECT (huge number fields)
        FROM (many tables)
        JOIN @filtre f ON 
            (PE.FK_COL_NO = f.cegep OR f.cegep IS NULL)
        AND (DAD_ANSES = f.anses OR f.anses IS NULL)
        AND ((DAD_ACTIF = f.cboActifs AND (T.COD_NO IS NULL OR LEFT(T.COD_NO,1)!='0')) OR f.cboActifs IS NULL)
        AND (PRF_ICON_CROCHET = f.cboCrochet OR f.cboCrochet IS NULL)
        AND (PRF_ICON_ETOILE = f.cboEtoile OR f.cboEtoile IS NULL)
        AND (PRF_ICON_EXCL = f.cboExcl OR f.cboExcl IS NULL)
        AND (PRF_ICON_INTERO = f.cboIntero OR f.cboIntero IS NULL)
        AND (TOU_NO = f.tour OR f.tour IS NULL)
        AND (DAD_CHANG_PROG = f.chprog OR f.chprog IS NULL)
        AND (PRO_NOPRO = f.prog OR f.prog IS NULL)
        AND (SUBSTRING(DAD_CODPERM,11,1)='T' AND f.cpt = 1 OR f.cpt IS NULL)
        AND ( (LEFT(T.COD_NO,1)='A' AND f.decision = 'A') OR
              (LEFT(T.COD_NO,1)='D' AND f.decision = 'D') OR
              (ISNUMERIC(T.COD_NO)=1 AND f.decision = 'R') OR
              (T.COD_NO='AT' AND f.decision = 'T') OR
              (COALESCE(T.COD_NO,'')='' AND f.decision = 'X') OR
              f.decision IS NULL
            )
        AND ( (TOU_PROCESSUS = 1 AND f.entente='a') OR
              (FK_TYF_NO IS NULL AND f.entente='0') OR
              (FK_TYF_NO = f.entente) OR
              f.entente IS NULL
            )
        AND ( DAD_EQE_COMPLET = f.equiv OR f.equiv IS NULL )
        AND ( DAD_AUTSEJ = f.autSej OR f.autSej IS NULL )
        AND ( DAD_TYPCIT = f.typCit OR f.typCit IS NULL )
        AND ( DAD_NOM LIKE f.filter OR
              DAD_PRENOM LIKE f.filter OR
              DAD_CODPERM LIKE f.filter OR
              D.DAD_NO LIKE f.filter OR
              DAD_COURRIEL LIKE f.filter OR
              DAD_TELE_RES LIKE f.filter OR
              CPA_NOMPAYS LIKE f.filter OR
              COM_CONTENU LIKE f.filter OR
              f.filter IS NULL
        )
END

使用表值参数查询参数？

0 个答案: