🎉 Base-normalization: Implement normalization for `MSSQL-destinatio…

…n` (airbytehq#6079)

See the attached PR (airbytehq#6079)

airbyte-integrations/bases/base-normalization/Dockerfile

@@ -4,9 +4,25 @@ USER root
 WORKDIR /tmp
 RUN apt-get update && apt-get install -y \
     wget \
+    curl \
     unzip \
     libaio-dev \
-    libaio1
+    libaio1 \
+    gnupg \
+    gnupg1 \
+    gnupg2
+
+# Install MS SQL Server dependencies
+RUN curl https://packages.microsoft.com/keys/microsoft.asc | apt-key add -
+RUN curl https://packages.microsoft.com/config/debian/10/prod.list > /etc/apt/sources.list.d/mssql-release.list
+RUN apt-get update && ACCEPT_EULA=Y apt-get install -y \
+    libgssapi-krb5-2 \
+    unixodbc-dev \
+    msodbcsql17 \
+    mssql-tools
+ENV PATH=$PATH:/opt/mssql-tools/bin
+
+# Install Oracle dependencies
 RUN mkdir -p /opt/oracle
 RUN wget https://download.oracle.com/otn_software/linux/instantclient/19600/instantclient-basic-linux.x64-19.6.0.0.0dbru.zip
 RUN unzip instantclient-basic-linux.x64-19.6.0.0.0dbru.zip -d /opt/oracle
@@ -17,8 +33,8 @@ RUN pip install cx_Oracle
 
 COPY --from=airbyte/base-airbyte-protocol-python:0.1.1 /airbyte /airbyte
 
+# Install SSH Tunneling dependencies 
 RUN apt-get update && apt-get install -y jq sshpass
-
 WORKDIR /airbyte
 COPY entrypoint.sh .
 COPY build/sshtunneling.sh .
@@ -28,13 +44,15 @@ COPY normalization ./normalization
 COPY setup.py .
 COPY dbt-project-template/ ./dbt-template/
 
+# Install python dependencies
 WORKDIR /airbyte/base_python_structs
 RUN pip install .
 
 WORKDIR /airbyte/normalization_code
 RUN pip install .
 RUN pip install dbt-oracle==0.4.3
 RUN pip install git+https://github.com/dbeatty10/dbt-mysql@96655ea9f7fca7be90c9112ce8ffbb5aac1d3716#egg=dbt-mysql
+RUN pip install dbt-sqlserver==0.19.3
 
 
 WORKDIR /airbyte/normalization_code/dbt-template/
@@ -45,5 +63,5 @@ WORKDIR /airbyte
 ENV AIRBYTE_ENTRYPOINT "/airbyte/entrypoint.sh"
 ENTRYPOINT ["/airbyte/entrypoint.sh"]
 
-LABEL io.airbyte.version=0.1.49
+LABEL io.airbyte.version=0.1.50
 LABEL io.airbyte.name=airbyte/normalization

airbyte-integrations/bases/base-normalization/README.md

@@ -9,6 +9,25 @@ Related documentation on normalization is available here:
 
 Below are short descriptions of the kind of tests that may be affected by changes to the normalization code.
 
+### Build & Activate Virtual Environment and install dependencies
+From this connector directory, create a virtual environment:
+```
+python3 -m venv .venv
+```
+
+This will generate a virtualenv for this module in `.venv/`. Make sure this venv is active in your
+development environment of choice. To activate it from the terminal, run:
+```
+source .venv/bin/activate
+pip install -r requirements.txt
+```
+If you are in an IDE, follow your IDE's instructions to activate the virtualenv.
+
+Note that while we are installing dependencies from `requirements.txt`, you should only edit `setup.py` for your dependencies. `requirements.txt` is
+used for editable installs (`pip install -e`) to pull in Python dependencies from the monorepo and will call `setup.py`.
+If this is mumbo jumbo to you, don't worry about it, just put your deps in `setup.py` but install using `pip install -r requirements.txt` and everything
+should work as you expect.
+
 ## Unit Tests
 
 Unit tests are automatically included when building the normalization project.
@@ -56,6 +75,7 @@ allowed characters, if quotes are needed or not, and the length limitations:
 - [snowflake](../../../docs/integrations/destinations/snowflake.md)
 - [mysql](../../../docs/integrations/destinations/mysql.md)
 - [oracle](../../../docs/integrations/destinations/oracle.md)
+- [mssql](../../../docs/integrations/destinations/mssql.md)
 
 Rules about truncations, for example for both of these strings which are too long for the postgres 64 limit:
 - `Aaaa_Bbbb_Cccc_Dddd_Eeee_Ffff_Gggg_Hhhh_Iiii`

airbyte-integrations/bases/base-normalization/build.gradle

@@ -44,6 +44,7 @@ task("customIntegrationTestPython", type: PythonTask, dependsOn: installTestReqs
     dependsOn ':airbyte-integrations:connectors:destination-redshift:airbyteDocker'
     dependsOn ':airbyte-integrations:connectors:destination-snowflake:airbyteDocker'
     dependsOn ':airbyte-integrations:connectors:destination-oracle:airbyteDocker'
+    dependsOn ':airbyte-integrations:connectors:destination-mssql:airbyteDocker'
 
 }
 

airbyte-integrations/bases/base-normalization/dbt-project-template/macros/cross_db_utils/array.sql

@@ -4,6 +4,7 @@
     - Snowflake: flatten() -> https://docs.snowflake.com/en/sql-reference/functions/flatten.html
     - Redshift: -> https://blog.getdbt.com/how-to-unnest-arrays-in-redshift/
     - postgres: unnest() -> https://www.postgresqltutorial.com/postgresql-array/
+    - MSSQL: openjson() –> https://docs.microsoft.com/en-us/sql/relational-databases/json/validate-query-and-change-json-data-with-built-in-functions-sql-server?view=sql-server-ver15
 #}
 
 {# cross_join_unnest -------------------------------------------------     #}
@@ -44,6 +45,17 @@
     cross join table(flatten({{ array_col }})) as {{ array_col }}
 {%- endmacro %}
 
+{% macro sqlserver__cross_join_unnest(stream_name, array_col) -%}
+{# https://docs.microsoft.com/en-us/sql/relational-databases/json/convert-json-data-to-rows-and-columns-with-openjson-sql-server?view=sql-server-ver15#option-1---openjson-with-the-default-output #}
+    CROSS APPLY (
+	    SELECT [value] = CASE 
+			WHEN [type] = 4 THEN (SELECT [value] FROM OPENJSON([value])) 
+			WHEN [type] = 5 THEN [value]
+			END
+	    FROM OPENJSON({{ array_col }})
+    ) AS {{ array_col }}
+{%- endmacro %}
+
 {# unnested_column_value -- this macro is related to unnest_cte #}
 
 {% macro unnested_column_value(column_col) -%}
@@ -74,6 +86,11 @@
     {{ column_col }}
 {%- endmacro %}
 
+{% macro sqlserver__unnested_column_value(column_col) -%}
+    {# unnested array/sub_array will be located in `value` column afterwards, we need to address to it #}
+    {{ column_col }}.value
+{%- endmacro %}
+
 {# unnest_cte -------------------------------------------------     #}
 
 {% macro unnest_cte(table_name, stream_name, column_col) -%}

airbyte-integrations/bases/base-normalization/dbt-project-template/macros/cross_db_utils/concat.sql

@@ -14,3 +14,13 @@
 {% macro postgres__concat(fields) %}
     {{ dbt_utils.alternative_concat(fields) }}
 {% endmacro %}
+
+{% macro sqlserver__concat(fields) -%}
+    {#-- CONCAT() in SQL SERVER accepts from 2 to 254 arguments, we use batches for the main concat, to overcome the limit. --#}
+    {% set concat_chunks = [] %}
+    {% for chunk in fields|batch(253) -%}
+        {% set _ = concat_chunks.append( "concat(" ~ chunk|join(', ') ~ ",'')" ) %}
+    {% endfor %}
+
+    concat({{ concat_chunks|join(', ') }}, '')
+{%- endmacro %}

airbyte-integrations/bases/base-normalization/dbt-project-template/macros/cross_db_utils/datatypes.sql

@@ -28,6 +28,10 @@
     json
 {%- endmacro -%}
 
+{%- macro sqlserver__type_json() -%}
+    VARCHAR(max)
+{%- endmacro -%}
+
 
 {# string ------------------------------------------------- #}
 
@@ -39,6 +43,10 @@
     varchar2(4000)
 {%- endmacro -%}
 
+{% macro sqlserver__type_string() %}
+    VARCHAR(max)
+{%- endmacro -%}
+
 
 {# float ------------------------------------------------- #}
 {% macro mysql__type_float() %}
@@ -69,17 +77,23 @@
 {% endmacro %}
 
 
-{# numeric ------------------------------------------------- #}
+{# numeric ------------------------------------------------- --#}
 {% macro mysql__type_numeric() %}
     float
 {% endmacro %}
 
 
-{# timestamp ------------------------------------------------- #}
+{# timestamp ------------------------------------------------- --#}
 {% macro mysql__type_timestamp() %}
     time
 {% endmacro %}
 
+{%- macro sqlserver__type_timestamp() -%}
+    {#-- in TSQL timestamp is really datetime --#}
+    {#-- https://docs.microsoft.com/en-us/sql/t-sql/functions/date-and-time-data-types-and-functions-transact-sql?view=sql-server-ver15#DateandTimeDataTypes --#}
+    datetime
+{%- endmacro -%}
+
 
 {# timestamp with time zone  -------------------------------------------------     #}
 
@@ -95,7 +109,7 @@
     timestamp
 {% endmacro %}
 
-{# MySQL doesnt allow cast operation to work with TIMESTAMP so we have to use char #}
+{#-- MySQL doesnt allow cast operation to work with TIMESTAMP so we have to use char --#}
 {%- macro mysql__type_timestamp_with_timezone() -%}
     char
 {%- endmacro -%}
@@ -104,6 +118,12 @@
     varchar2(4000)
 {% endmacro %}
 
+{%- macro sqlserver__type_timestamp_with_timezone() -%}
+    {#-- in TSQL timestamp is really datetime or datetime2 --#}
+    {#-- https://docs.microsoft.com/en-us/sql/t-sql/functions/date-and-time-data-types-and-functions-transact-sql?view=sql-server-ver15#DateandTimeDataTypes --#}
+    datetime
+{%- endmacro -%}
+
 
 {# date  -------------------------------------------------     #}
 
@@ -118,3 +138,7 @@
 {% macro oracle__type_date() %}
     varchar2(4000)
 {% endmacro %}
+
+{%- macro sqlserver__type_date() -%}
+    date
+{%- endmacro -%}

airbyte-integrations/bases/base-normalization/dbt-project-template/macros/cross_db_utils/hash.sql

@@ -0,0 +1,5 @@
+{# converting hash in varchar _macro #}
+
+{% macro sqlserver__hash(field) -%}
+    convert(varchar(32), HashBytes('md5',  coalesce(cast({{field}} as {{dbt_utils.type_string()}}), '')), 2)
+{%- endmacro %}

airbyte-integrations/bases/base-normalization/dbt-project-template/macros/cross_db_utils/json_operations.sql

@@ -57,6 +57,15 @@
     {{ "'\"" ~ str_list|join('"."') ~ "\"'" }}
 {%- endmacro %}
 
+{% macro sqlserver__format_json_path(json_path_list) -%}
+    {# -- '$."x"."y"."z"' #}
+    {%- set str_list = [] -%}
+    {%- for json_path in json_path_list -%}
+        {%- if str_list.append(json_path.replace("'", "''").replace('"', '\\"')) -%} {%- endif -%}
+    {%- endfor -%}
+    {{ "'$.\"" ~ str_list|join(".") ~ "\"'" }}
+{%- endmacro %}
+
 {# json_extract -------------------------------------------------     #}
 
 {% macro json_extract(from_table, json_column, json_path_list, normalized_json_path) -%}
@@ -111,6 +120,10 @@
     {% endif -%}
 {%- endmacro %}
 
+{% macro sqlserver__json_extract(from_table, json_column, json_path_list, normalized_json_path) -%}
+    json_query({{ json_column }}, {{ format_json_path(json_path_list) }})
+{%- endmacro %}
+
 {# json_extract_scalar -------------------------------------------------     #}
 
 {% macro json_extract_scalar(json_column, json_path_list, normalized_json_path) -%}
@@ -145,6 +158,10 @@
     to_varchar(get_path(parse_json({{ json_column }}), {{ format_json_path(json_path_list) }}))
 {%- endmacro %}
 
+{% macro sqlserver__json_extract_scalar(json_column, json_path_list, normalized_json_path) -%}
+    json_value({{ json_column }}, {{ format_json_path(json_path_list) }})
+{%- endmacro %}
+
 {# json_extract_array -------------------------------------------------     #}
 
 {% macro json_extract_array(json_column, json_path_list, normalized_json_path) -%}
@@ -178,3 +195,7 @@
 {% macro snowflake__json_extract_array(json_column, json_path_list, normalized_json_path) -%}
     get_path(parse_json({{ json_column }}), {{ format_json_path(json_path_list) }})
 {%- endmacro %}
+
+{% macro sqlserver__json_extract_array(json_column, json_path_list, normalized_json_path) -%}
+    json_query({{ json_column }}, {{ format_json_path(json_path_list) }})
+{%- endmacro %}

airbyte-integrations/bases/base-normalization/dbt-project-template/macros/cross_db_utils/type_conversions.sql

@@ -29,6 +29,10 @@
     cast({{ array_column }} as varchar2(4000))
 {%- endmacro %}
 
+{% macro sqlserver__array_to_string(array_column) -%}
+    cast({{ array_column }} as {{dbt_utils.type_string()}})
+{%- endmacro %}
+
 {# cast_to_boolean -------------------------------------------------     #}
 {% macro cast_to_boolean(field) -%}
     {{ adapter.dispatch('cast_to_boolean')(field) }}
@@ -47,3 +51,8 @@
 {% macro redshift__cast_to_boolean(field) -%}
     cast(decode({{ field }}, 'true', '1', 'false', '0')::integer as boolean)
 {%- endmacro %}
+
+{# -- MS SQL Server does not support converting string directly to boolean, it must be casted as bit #}
+{% macro sqlserver__cast_to_boolean(field) -%}
+    cast({{ field }} as bit)
+{%- endmacro %}