Grammar for filterExpression does not support identitiers starting with _

[freimer]

It is relatively common to start an identifier with _. The current grammar does not support this. Please consider modifying the grammar to support identifiers starting with _.

[aaronsven]

Hi, can you provide more details?

[aaronsven]

You want to change this line: https://github.com/awslabs/aws-appflow-custom-connector-python/blob/main/custom_connector_queryfilter/queryfilter/grammar/CustomConnectorQueryFilterLexer.g4#L25

[freimer]

Thanks, can we get this in a PR? Is there anything in the AWS AppFlow backend that would prevent having fields starting with an _?

[aaronsven]

There is nothing that I know of, as far as i know there is no limitation on field name. I will discuss with team and get back to you.

[saisowhit]

Where do the field names exist?