Merge pull request #13 from oracle/fix/clean_global_temporary_table

Fix/clean global temporary table

Author: aosingh

dbt/include/oracle/macros/adapters.sql

@@ -268,9 +268,12 @@
 {% endmacro %}
 
 {% macro oracle__truncate_relation(relation) -%}
-  {% call statement('truncate_relation') -%}
-    truncate table {{ relation.quote(schema=False, identifier=False) }}
-  {%- endcall %}
+  {#-- To avoid `ORA-01702: a view is not appropriate here` we check that the relation to be truncated is a table #}
+  {% if relation.is_table %}
+    {% call statement('truncate_relation') -%}
+        truncate table {{ relation.quote(schema=False, identifier=False) }}
+    {%- endcall %}
+  {% endif %}
 {% endmacro %}
 
 {% macro oracle__rename_relation(from_relation, to_relation) -%}

dbt/include/oracle/macros/materializations/incremental/incremental.sql

@@ -62,6 +62,7 @@
   {% do adapter.commit() %}
 
   {% for rel in to_drop %}
+      {% do adapter.truncate_relation(rel) %}
       {% do adapter.drop_relation(rel) %}
   {% endfor %}
 

dbt/include/oracle/macros/materializations/snapshot/snapshot.sql

@@ -35,8 +35,9 @@
   {{ adapter.dispatch('post_snapshot')(staging_relation) }}
 {% endmacro %}
 
-{% macro default__post_snapshot(staging_relation) %}
-    {# no-op #}
+{% macro oracle__post_snapshot(staging_relation) %}
+    {% do adapter.truncate_relation(staging_relation) %}
+    {% do adapter.drop_relation(staging_relation) %}
 {% endmacro %}