Azure Logic App Sql Connector

Question

I am working on Logic App that pulls CDC Data from SQL Server Db. I am using Get Rows operation but the problem comes in when I try to use the Filter Query parameter.

• code eq '793' (works)
• __$operation eq '2' (Not working)
• @{string('__$operation')} eq '2' (Not working)

I think the problem might be with the "$" character.

Error message

{  
  "status": 400,  
  "message": "Syntax error at position 12 in '__$operation eq '2'' "  
}

Can someone please help me!

Answer 1

I am using Get Rows operation but the problem comes in when I try to use the Filter Query parameter.

I think the problem might be with the "$" character.

Based on my test, if the field/column contains $ (or __ ) and use that field in Filter Query , which works fine.

But if I define the field as __$operation that starts with __$ , which will cause the same issue when I use it in Filter Query. So if possible, you can try to modify the column name in your SQL database.

Answer 2

$ is a reserved character according to OData Normative , you should percent-encoding it before the URI is formed. Unfortunately, I tried percent encoding and still get syntax error, seems it's not allowed in Filter Query.

Solution

---

Here is the solution, in Logic App you cannot use % in Filter Query, so you can't use %24 for $ , instead you should use _x0024_ .I can successfully get the result now:

Note there are three _ at the beginning. You can use this pattern if you have other special characters in field/column name. For example, if the field name is Display Name which has a space character in between, then in Filter Query, you need to convert it to Display_0x0020_Name

For more details about this encoding, please refer to Encode and Decode XML Element and Attribute Names and ID Values