fix: snapshots failing because of wrong mysql colum quoting

CHANGELOG.md

@@ -6,6 +6,7 @@
 - Support dbt v1.5 ([#145](https://github.com/dbeatty10/dbt-mysql/issues/145))
 - Support connecting via UNIX sockets ([#164](https://github.com/dbeatty10/dbt-mysql/issues/164))
 - Support Black & MyPy pre-commit hooks ([#138](https://github.com/dbeatty10/dbt-mysql/issues/138))
+- Support dbt snapshots if table DDL is evolving ([#171](https://github.com/dbeatty10/dbt-mysql/pull/171))
 
 ### Fixes
 - Fix incremental composite keys ([#144](https://github.com/dbeatty10/dbt-mysql/issues/144))

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

@@ -1,3 +1,14 @@
+{#
+    Add new columns to the table if applicable
+#}
+
+{% macro mariadb__create_columns(relation, columns) %}
+  {% for column in columns %}
+    {% call statement() %}
+      alter table {{ relation }} add column {{ column.quoted() }} {{ column.data_type }};
+    {% endcall %}
+  {% endfor %}
+{% endmacro %}
 
 {% macro mariadb__snapshot_string_as_time(timestamp) -%}
     {%- set result = "str_to_date('" ~ timestamp ~ "', '%Y-%m-%d %T')" -%}

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

@@ -1,3 +1,14 @@
+{#
+    Add new columns to the table if applicable
+#}
+
+{% macro mysql__create_columns(relation, columns) %}
+  {% for column in columns %}
+    {% call statement() %}
+      alter table {{ relation }} add column {{ column.quoted() }} {{ column.data_type }};
+    {% endcall %}
+  {% endfor %}
+{% endmacro %}
 
 {% macro mysql__snapshot_string_as_time(timestamp) -%}
     {%- set result = "str_to_date('" ~ timestamp ~ "', '%Y-%m-%d %T')" -%}

dbt/include/mysql5/macros/materializations/snapshot/snapshot.sql

@@ -1,3 +1,14 @@
+{#
+    Add new columns to the table if applicable
+#}
+
+{% macro mysql5__create_columns(relation, columns) %}
+  {% for column in columns %}
+    {% call statement() %}
+      alter table {{ relation }} add column {{ column.quoted() }} {{ column.data_type }};
+    {% endcall %}
+  {% endfor %}
+{% endmacro %}
 
 {% macro mysql5__snapshot_string_as_time(timestamp) -%}
     {%- set result = "str_to_date('" ~ timestamp ~ "', '%Y-%m-%d %T')" -%}