Merge pull request #3000 from swanderz/tsql_not_equal_workaround

Tsql not equal workaround
dbt-labs · Jan 11, 2021 · a4280d7 · a4280d7
2 parents 30f473a + 6966ede
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diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -1,7 +1,11 @@
 ## dbt 0.19.0 (Release TBD)
 
+### Under the hood
+- Rewrite logic in `snapshot_check_strategy()` to make compatible with other SQL dialects ([#3000](https://github.com/fishtown-analytics/dbt/pull/3000), [#3001](https://github.com/fishtown-analytics/dbt/pull/3001))
+
 Contributors:
 - [@dbeatty10](https://github.com/dbeatty10) ([dbt-adapter-tests#10](https://github.com/fishtown-analytics/dbt-adapter-tests/pull/10))
+- [@swanderz](https://github.com/swanderz) ([#3000](https://github.com/fishtown-analytics/dbt/pull/3000))
 
 ## dbt 0.19.0rc1 (December 29, 2020)
 

diff --git a/core/dbt/include/global_project/macros/materializations/snapshot/strategies.sql b/core/dbt/include/global_project/macros/materializations/snapshot/strategies.sql
@@ -164,7 +164,11 @@
  {%- for col in check_cols -%}
  {{ snapshotted_rel }}.{{ col }} != {{ current_rel }}.{{ col }}
  or
- ({{ snapshotted_rel }}.{{ col }} is null) != ({{ current_rel }}.{{ col }} is null)
+ (
+ (({{ snapshotted_rel }}.{{ col }} is null) and not ({{ current_rel }}.{{ col }} is null))
+ or
+ ((not {{ snapshotted_rel }}.{{ col }} is null) and ({{ current_rel }}.{{ col }} is null))
+ )
  {%- if not loop.last %} or {% endif -%}
  {%- endfor -%}
  {%- endif -%}