Add sparksql engine spec

CHANGELOG.md

@@ -3,8 +3,11 @@
 ## [Unreleased]
 <details>
   <summary>
-    Changes that have landed in master but are not yet released.
-    Click to see more.
+
+### Fixed
+
+- Timestamp type not mapped correctly from Spark SQL to Hive ([#227](https://github.com/src-d/sourced-ui/issues/227))
+
   </summary>
 
 </details>

superset/contrib/docker/superset_config.py

@@ -96,11 +96,16 @@ class CeleryConfig(object):
     if GITBASE_PASSWORD:
         GITBASE_AUTH += ':%s' % GITBASE_PASSWORD
     GITBASE_AUTH += '@'
-GITBASE_DATABASE_URI = '%s://%s%s:%s/%s?charset=utf8' % (GITBASE_PREFIX,
-                                                         GITBASE_AUTH,
-                                                         GITBASE_HOST,
-                                                         GITBASE_PORT,
-                                                         GITBASE_DB)
+
+GITBASE_QUERY_PARAMS = ''
+if not IS_EE:
+    GITBASE_QUERY_PARAMS = '?charset=utf8'
+GITBASE_DATABASE_URI = '%s://%s%s:%s/%s%s' % (GITBASE_PREFIX,
+                                              GITBASE_AUTH,
+                                              GITBASE_HOST,
+                                              GITBASE_PORT,
+                                              GITBASE_DB,
+                                              GITBASE_QUERY_PARAMS)
 
 SQLLAB_DEFAULT_DBID = 2  # set gitbase as default DB in SQL Lab
 

superset/superset/db_engine_specs.py

@@ -1411,6 +1411,16 @@ def execute(cursor, query, async_=False):
         cursor.execute(query, **kwargs)
 
 
+class SparkSQLEngineSpec(HiveEngineSpec):
+    """Reuses HiveEngineSpec functionality."""
+
+    engine = 'sparksql'
+
+    @classmethod
+    def get_view_names(cls, inspector, schema):
+        return BaseEngineSpec.get_view_names(inspector, schema)
+
+
 class MssqlEngineSpec(BaseEngineSpec):
     engine = 'mssql'
     epoch_to_dttm = "dateadd(S, {col}, '1970-01-01')"