pytds 调用的 MSSQL 存储过程返回的记录太多

Question

我在 MSSQL 数据库中有一个存储过程，如下所示：

SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[VideoSearchThorough]
(
  @SearchString NVARCHAR(4000) = ''
  , @Offset INT = 0
  , @Limit INT = 100
  , @UserId INT = 0
  , @ProviderId INT = NULL
  , @StatusType INT = 0
  , @StartDate datetime = NULL
  , @EndDate datetime = NULL
  , @UseUpdatedDate bit = 0
  , @PltValue INT = NULL
)
AS
BEGIN
    DECLARE @OrderClause VARCHAR(200) = 'CreatedDate DESC'

    IF @Limit IS NULL OR @Limit > 100 SET @Limit = 100

    CREATE TABLE #tmpsrch(
      VideoId BIGINT,
      UserId INT,
      VideoUrl VARCHAR(500),
      Title VARCHAR(1000),
      Description VARCHAR(5000),
      CreatedDate datetime,
      EffectiveDate datetime,
      ExpirationDate datetime,
      Height INT,
      Width INT,
      Duration decimal(10, 2),
      ThumbnailUrl VARCHAR(200),
      Keywords VARCHAR(200),
      IsEnabled bit,
      IsDeleted bit,
      ProviderId INT,
      ProviderName VARCHAR(200),
      ProviderLogo VARCHAR(200),
      ProviderTrackingGroup INT,
      ProviderIsMediaSource bit,
      ProviderContentIsPrivate bit
    )

    INSERT INTO #tmpsrch(VideoId, UserId, VideoUrl, Title, Description, CreatedDate, EffectiveDate, ExpirationDate, Height, Width, Duration, ThumbnailUrl, Keywords, IsEnabled, IsDeleted, ProviderId, ProviderName, ProviderLogo, ProviderTrackingGroup, ProviderIsMediaSource, ProviderContentIsPrivate)
    EXEC VideoSearch @SearchString=@SearchString, @MatchType=0

    IF (SELECT COUNT(*) FROM #tmpsrch (NOLOCK)) = 0
    INSERT INTO #tmpsrch(VideoId, UserId, VideoUrl, Title, Description, CreatedDate, EffectiveDate, ExpirationDate, Height, Width, Duration, ThumbnailUrl, Keywords, IsEnabled, IsDeleted, ProviderId, ProviderName, ProviderLogo, ProviderTrackingGroup, ProviderIsMediaSource, ProviderContentIsPrivate)
    EXEC VideoSearch @SearchString=@SearchString, @MatchType=1

    IF (SELECT COUNT(*) FROM #tmpsrch (NOLOCK)) = 0
    INSERT INTO #tmpsrch(VideoId, UserId, VideoUrl, Title, Description, CreatedDate, EffectiveDate, ExpirationDate, Height, Width, Duration, ThumbnailUrl, Keywords, IsEnabled, IsDeleted, ProviderId, ProviderName, ProviderLogo, ProviderTrackingGroup, ProviderIsMediaSource, ProviderContentIsPrivate)
    EXEC VideoSearch @SearchString=@SearchString, @MatchType=2

    SELECT TOP (@Limit) *, (SELECT COUNT(*) FROM #tmpsrch (NOLOCK)) AS ResultsAvailable FROM (
        SELECT
            ROW_NUMBER() OVER (ORDER BY CreatedDate DESC) AS rowId,
            *
        FROM #tmpsrch
    ) AS results
    WHERE results.rowId > @Offset

    DROP TABLE #tmpsrch
END

GO

在我的 python 3 代码中，我通过 pytds 模块调用这个存储过程：

with pytds.connect(db_server, db_name, db_user, db_pass) as connection, connection.cursor() as cursor:
    cursor.callproc('VideoSearchThorough', ['search string', 0, 20])
    response = cursor.fetchall()
    result = []
    for rowData in response:
        row = {}
        for columnIndex, columnData in enumerate(cursor.description):
            row[columnData[0]] = rowData[columnIndex]
        result.append(row)

    return result # This contains 84 result records

但是，当我在我的 SQL Operations Studio 客户端中执行以下 SQL 时：

VideoSearchThorough 'search string', 0, 20

..只返回 20 条记录。我只需要 20 条记录，因为我将 20 作为限制（提供给 VideoSearchThorough 存储过程的第三个参数）。

但是在Python3.7中使用pytds模块时一共返回了84条记录，为什么不一样？

Answer 1

我在你的 Python 代码中没有看到你设置 @Limit 变量的地方：如果你没有设置它，它使用默认值 100，但只有 87 条记录至 return.

pytds 调用的 MSSQL 存储过程返回的记录太多

Too many records returned from MSSQL stored procedure called by pytds

python

sql-server

sql-server-2008

python-3.x