Question

上下文： 我有一个SQL查询，它通过master.dbo.xp_cmdshell大量使用了临时表和一些外部资源，我需要重构T-SQL，以便可以将其传递给Pyodbc游标并成功执行。

从我在这里读到的内容：Create SQL Server temporary tables inside Python script和这里：Pyodbc execution failed on temp table来看，让pyodbc接受本地/全局临时表操作很棘手。我还没弄清楚。

问题： 有人可以帮我修改下面的T-SQL块，以便它可以成功地通过pyodbc查询游标运行吗？用CTE替换临时表似乎不起作用。

IF OBJECT_ID('tempdb..##jsondump') IS NOT NULL DROP TABLE ##jsondump
IF OBJECT_ID('tempdb..##jsonparsed') IS NOT NULL DROP TABLE ##jsonparsed
IF OBJECT_ID('tempdb..##json_loop') IS NOT NULL DROP TABLE ##json_loop

CREATE TABLE ##jsondump (
    [my_json] [nvarchar](max) NULL
) 

-- Create a table to house the parsed content
CREATE TABLE ##jsonparsed (
    [id] [int] NULL,
    [url] [varchar](255) NULL,
    [company_name] [varchar](255) NULL,
    [domain] [varchar](255) NULL
)

-- Clear ##jsondump
TRUNCATE TABLE ##jsondump;
GO

-- Clear ##jsonparsed ( only if you don't want to keep what's already there )
TRUNCATE TABLE ##jsonparsed;
GO

BULK INSERT ##jsondump
FROM 'C:\Users\ebarnes\etl_project\company_data.json' 
WITH (
    ROWTERMINATOR = '\n'
);

-- Select JSON into ##jsonparsed
SELECT my_json 
INTO ##json_loop
FROM ##jsondump

INSERT INTO ##jsonparsed (
    id, [url], company_name, domain
)
SELECT
    jsn.id, jsn.[url], jsn.company_name, jsn.domain
FROM ##json_loop
OUTER APPLY (

    SELECT * FROM OPENJSON(##json_loop.my_json, '$.companies' )
    WITH (
        id INT '$.id',
        [url] VARCHAR(255) '$.url',
        company_name VARCHAR(255) '$.company_name',
        domain VARCHAR(255) '$.domain'
    )

) AS jsn

exec master.dbo.xp_cmdshell 'bcp "SELECT ''Company_ID'', ''MatterMark_URL'', ''Company_Name'', ''Domain'' UNION ALL SELECT DISTINCT cast(id as varchar( 12 ) ), url, company_name, domain FROM ##jsonparsed" queryout C:\Users\ebarnes\etl_project\company_data.txt -c -T -t'


--SELECT DISTINCT * FROM ##jsonparsed
--ORDER BY id ASC;

DROP TABLE ##jsondump 
DROP TABLE ##jsonparsed 
DROP TABLE ##json_loop 

exec xp_cmdshell 'powershell ""C:\Users\ebarnes\etl_project\open_file.ps1""'

无法通过Pyodbc游标传递T-SQL

0 个答案: