Azure DataWarehouse 使用外部 Table 加载 CSV

Question

我找不到一个完整的示例来说明如何将带有外部 table 的 CSV 文件直接加载到 Sql 数据仓库中。该文件位于存储帐户 https://tstodummy.blob.core.windows.net/ Blob 容器 referencedata-in，文件夹 csv-uploads，文件 something.csv。这是我的代码

CREATE DATABASE SCOPED CREDENTIAL tstodummy_refdata_credential
  WITH IDENTITY = 'USER',
  SECRET = '....'
GO

CREATE EXTERNAL DATA SOURCE tstodummy_referencedata
  WITH ( TYPE = HADOOP,
         LOCATION = 'wasb://referencedata-in@tstodummy.blob.core.windows.net',
         CREDENTIAL = tstodummy_refdata_credential);
GO

CREATE EXTERNAL FILE FORMAT aps_bma_referencedata_ff
WITH (FORMAT_TYPE = DELIMITEDTEXT,
      FORMAT_OPTIONS(
          FIELD_TERMINATOR = ';',
          STRING_DELIMITER = '"',
          FIRST_ROW = 2, 
          USE_TYPE_DEFAULT = True)
)

CREATE EXTERNAL TABLE [stg_aps_bma_refdata].[PlanDeMaintenance]
  ( [Version]     VARCHAR(255) NULL
  , [Description] VARCHAR(255) NULL
  , [Date_Start]  VARCHAR(255) NULL
  , [Date_Stop]   VARCHAR(255) NULL
  ) WITH ( LOCATION = '\referencedata-in\csv-uploads\PlanDeMaintanance'
         , DATA_SOURCE = tstodummy_referencedata
         , FILE_FORMAT = aps_bma_referencedata_ff
         , REJECT_TYPE = VALUE
         , REJECT_VALUE = 0
         )

我一直在玩 Location 中的各种组合...但是，Nogo 错误是

Msg 105002, Level 16, State 1, Line 26
EXTERNAL TABLE access failed because the specified path name '/referencedata-in/csv-uploads/PlanDeMaintanance.csv' does not exist. Enter a valid path and try again.

Answer 1

我看不到你的存储结构，但我想你会发现问题出在外部 table 位置包含“/referencedata-in”。

一件小事，您可能还想考虑在存储 URL 上添加一个 "wasbs" 前缀，以便将 SSL 加密应用于传输。

Answer 2

最后，这在其他人遇到销售问题时起到了作用。我还没有在这段代码中添加我收到的评论，同时完成。

CREATE EXTERNAL DATA SOURCE tsto_referencedata
  WITH ( TYPE = HADOOP,
         LOCATION = 'wasb://referencedata-in@tsto.blob.core.windows.net',
         CREDENTIAL = tsto_refdata_credential);
GO

CREATE EXTERNAL FILE FORMAT aps_bma_referencedata_ff
WITH (FORMAT_TYPE = DELIMITEDTEXT,
      FORMAT_OPTIONS(
          FIELD_TERMINATOR = ',',
          STRING_DELIMITER = '"',
          FIRST_ROW = 2, 
          USE_TYPE_DEFAULT = True)
)

CREATE EXTERNAL TABLE [stg_aps_bma_refdata].[PlanDeMaintenance.csv]
  ( [Version]     VARCHAR(255) NULL
  , [Description] VARCHAR(255) NULL
  , [Date_Start]  VARCHAR(255) NULL
  , [Date_Stop]   VARCHAR(255) NULL
  ) WITH ( LOCATION = '/csv-uploads/PlanDeMaintenance.csv'
         , DATA_SOURCE = tsto_referencedata
         , FILE_FORMAT = aps_bma_referencedata_ff
         , REJECT_TYPE = VALUE
         , REJECT_VALUE = 0
         )

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