Bugfix/transformation log and changelog test

[fivetran-joemarkiewicz]

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Fivetran created PR

What change(s) does this PR introduce?

This PR makes two notable changes:

1. The unique_combination_of_columns schema test for the fivetran_log__schema_changelog model has been adjusted to also account for the message_data field. This adjustment is necessary as the Fivetran Log connector has been modified to sync multiple records at the same time. Therefore, multiple schema changes may come in at the same time. Therefore, we now want to look at the actual change for uniqueness as well.
2. A number of customers have noted that their fivetran_log__connector_status model fails due to JSON parsing not being able to be performed on non-JSON fields (this is only occurring in Snowflake instances). It was found that these non-JSON fields are limited only to TRANSFORMATIONS event_subtypes. Since transformation logs are not needed in this model in the first place, an adjustment has been made to filter the records out before further modeling takes place.
   • Please note I broke this out into separate CTEs since we needed to first filter out all transformations and then do our normal filtering.

Did you update the CHANGELOG?

• Yes

Does this PR introduce a breaking change?

• Yes (please provide breaking change details below.)
• No (please provide an explanation as to how the change is non-breaking below.)

This is a bug fix that will not impact existing customers package runs.

Did you update the dbt_project.yml files with the version upgrade (please leverage standard semantic versioning)? (In both your main project and integration_tests)

• Yes

Is this PR in response to a previously created Bug or Feature Request

• Yes, Issue [Bug] duplicate rows in fivetran_log__schema_changelog #49 and [Bug] Unique combo of columns test failure due to non JSON in JSON column #45 and [Bug] Error parsing JSON in message_data in fivetran_log__connector_status  #46
• No

How did you test the PR changes?

• CircleCi
• Local (please provide additional testing details below)

This succeeded on my local branch as well as customers in addition to CircleCi.

Select which warehouse(s) were used to test the PR

• BigQuery
• Redshift
• Snowflake
• Postgres
• Databricks
• Other (provide details below)

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Feedback

We are so excited you decided to contribute to the Fivetran community dbt package! We continue to work to improve the packages and would greatly appreciate your feedback on our existing dbt packages or what you'd like to see next.

[fivetran-jamie]

lgtm!