将json数据从文件加载到Postgres [英] Loading json data from a file into Postgres

问题描述

我需要将多个JSON文件中的数据加载到Postgres表中，每个JSON文件中都包含多个记录.我正在使用以下代码，但无法正常运行(在Windows上使用pgAdmin III)

I need to load data from multiple JSON files each having multiple records within them to a Postgres table. I am using the following code but it does not work (am using pgAdmin III on windows)

COPY tbl_staging_eventlog1 ("EId", "Category", "Mac", "Path", "ID")
from 'C:\\SAMPLE.JSON' 
delimiter ','
;

SAMPLE.JSON文件的内容是这样的(从许多这样的记录中得到两个记录):

Content of SAMPLE.JSON file is like this (giving two records out of many such):

[{"EId":"104111","Category":"(0)","Mac":"ABV","Path":"C:\\Program Files (x86)\\Google","ID":"System.Byte[]"},{"EId":"104110","Category":"(0)","Mac":"BVC","Path":"C:\\Program Files (x86)\\Google","ID":"System.Byte[]"}]

推荐答案

尝试一下:

BEGIN;
-- let's create a temp table to bulk data into
create temporary table temp_json (values text) on commit drop;
copy temp_json from 'C:\SAMPLE.JSON';

-- uncomment the line above to insert records into your table
-- insert into tbl_staging_eventlog1 ("EId", "Category", "Mac", "Path", "ID") 

select values->>'EId' as EId,
       values->>'Category' as Category,
       values->>'Mac' as Mac,
       values->>'Path' as Path,
       values->>'ID' as ID      
from   (
           select json_array_elements(replace(values,'\','\\')::json) as values 
           from   temp_json
       ) a; 
COMMIT;

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