Read attachments for an incident

Retrieve all file attachments linked to a specific incident. Attachments are stored in the sys_attachment table.

This example is commonly used before downloading or deleting attachments.

Standard SQL query example

This is the base query accepted by the connector. To execute it in SQL Server, you have to pass it to the Data Gateway via a Linked Server. See how to accomplish this using the examples below.

-- List attachments linked to an incident
SELECT *
FROM get_table_rows
WITH(
	TableName='sys_attachment',
	Query='table_name=incident^table_sys_id=<<INCIDENT_SYS_ID>>'
)

Using OPENQUERY in SQL Server

SELECT * FROM OPENQUERY([LS_TO_SERVICENOW_IN_GATEWAY], '-- List attachments linked to an incident
SELECT *
FROM get_table_rows
WITH(
	TableName=''sys_attachment'',
	Query=''table_name=incident^table_sys_id=<<INCIDENT_SYS_ID>>''
)')

Using EXEC in SQL Server (handling larger SQL text)

The major drawback of OPENQUERY is its inability to incorporate variables within SQL statements. This often leads to the use of cumbersome dynamic SQL (with numerous ticks and escape characters).

Fortunately, starting with SQL 2005 and onwards, you can utilize the EXEC (your_sql) AT [LS_TO_SERVICENOW_IN_GATEWAY] syntax.

DECLARE @MyQuery NVARCHAR(MAX) = '-- List attachments linked to an incident
SELECT *
FROM get_table_rows
WITH(
	TableName=''sys_attachment'',
	Query=''table_name=incident^table_sys_id=<<INCIDENT_SYS_ID>>''
)'
EXEC (@MyQuery) AT [LS_TO_SERVICENOW_IN_GATEWAY]