Bug: Force dbt to run single-threaded. (#35)

* Started adding  variable. Some extra s which are commented out and need to be removed.

* Added macro to adapters.sql to error out when > 1 thread is specified in profiles.yml.

* Bumped version number, because I'll push to PyPI, and updated change log.

* Removed extraneous prints and some function arguments that were leftovers from a previous attempt.

* Since all references to it were removed, deleted get_credentials() from connections.py.

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## v.0.21.7
+
+### Changes
+
+- Disallowed setting of `threads` in `profiles.yml` to a value greater than 1.
+
 ## v.0.21.6
 
 ### Changes

dbt/adapters/firebolt/__version__.py

@@ -1 +1 @@
-version = '0.21.6'
+version = '0.21.7'

dbt/adapters/firebolt/connections.py

@@ -77,7 +77,7 @@ class FireboltConnectionManager(SQLConnectionManager):
     def open(cls, connection):
         if connection.state == 'open':
             return connection
-        credentials = cls.get_credentials(connection.credentials)
+        credentials = connection.credentials
         jdbc_url = cls.make_jdbc_url(cls, credentials)
 
         try:
@@ -181,10 +181,6 @@ def commit(self):
         Firebolt does not yet support transactions.
         """
 
-    @classmethod
-    def get_credentials(cls, credentials):
-        return credentials
-
     def cancel(self, connection):
         """Cancel the last query on the given connection."""
         raise dbt.exceptions.NotImplementedException(

dbt/include/firebolt/macros/adapters.sql

@@ -23,6 +23,9 @@
 
 
 {% macro firebolt__list_schemas(database) %}
+    {% if target.threads > 1 %}
+        {{ exceptions.raise_compiler_error("Firebolt does not currently support more than one thread.") }}
+    {% endif %}
     {% call statement('list_schemas', fetch_result=True, auto_begin=False) %}
         SELECT '{{target.schema}}' AS schema
     {% endcall %}