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Allow configuring snapshot column names #1097

Merged
merged 11 commits into from
Sep 20, 2024
Merged

Allow configuring snapshot column names #1097

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78aa1a5
update snapshot.sql to use snapshot column names
gshank Aug 28, 2024
a83dc95
Get snapshot_table_column_names
gshank Aug 29, 2024
9a374be
Update branches in dev-requirements.txt and changie
gshank Sep 3, 2024
4c0886f
Merge branch 'main' into snapshot_column_names
gshank Sep 13, 2024
5218ad0
Update for new columns names format
gshank Sep 13, 2024
402265a
remove branches from dev-requirements.txt
gshank Sep 13, 2024
cc960f3
Use get_snapshot_table_column_names macro
gshank Sep 16, 2024
7cda487
typo
gshank Sep 16, 2024
6797529
Use snapshot_column_names branch for dbt-adapters
gshank Sep 17, 2024
ba7c611
Change stcn to "columns"
gshank Sep 18, 2024
3837a1a
Update lower bound pin of dbt-adapters to 1.7.0
gshank Sep 19, 2024
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6 changes: 6 additions & 0 deletions .changes/unreleased/Features-20240903-161003.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,6 @@
kind: Features
body: Allow configuring snapshot column names
time: 2024-09-03T16:10:03.021221-04:00
custom:
Author: gshank
Issue: "1096"
16 changes: 9 additions & 7 deletions dbt/include/spark/macros/materializations/snapshot.sql
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Expand Up @@ -13,6 +13,7 @@


{% macro spark__snapshot_merge_sql(target, source, insert_cols) -%}
{%- set columns = config.get("snapshot_table_column_names") or get_snapshot_table_column_names() -%}

merge into {{ target }} as DBT_INTERNAL_DEST
{% if target.is_iceberg %}
Expand All @@ -21,12 +22,12 @@
{% else %}
using {{ source }} as DBT_INTERNAL_SOURCE
{% endif %}
on DBT_INTERNAL_SOURCE.dbt_scd_id = DBT_INTERNAL_DEST.dbt_scd_id
on DBT_INTERNAL_SOURCE.{{ columns.dbt_scd_id }} = DBT_INTERNAL_DEST.{{ columns.dbt_scd_id }}
when matched
and DBT_INTERNAL_DEST.dbt_valid_to is null
and DBT_INTERNAL_DEST.{{ columns.dbt_valid_to }} is null
and DBT_INTERNAL_SOURCE.dbt_change_type in ('update', 'delete')
then update
set dbt_valid_to = DBT_INTERNAL_SOURCE.dbt_valid_to
set {{ columns.dbt_valid_to }} = DBT_INTERNAL_SOURCE.{{ columns.dbt_valid_to }}

when not matched
and DBT_INTERNAL_SOURCE.dbt_change_type = 'insert'
Expand Down Expand Up @@ -81,13 +82,12 @@


{% materialization snapshot, adapter='spark' %}
{%- set config = model['config'] -%}

{%- set target_table = model.get('alias', model.get('name')) -%}

{%- set strategy_name = config.get('strategy') -%}
{%- set unique_key = config.get('unique_key') %}
{%- set file_format = config.get('file_format', 'parquet') -%}
{%- set file_format = config.get('file_format') or 'parquet' -%}
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{%- set grant_config = config.get('grants') -%}

{% set target_relation_exists, target_relation = get_or_create_relation(
Expand Down Expand Up @@ -126,7 +126,7 @@
{{ run_hooks(pre_hooks, inside_transaction=True) }}

{% set strategy_macro = strategy_dispatch(strategy_name) %}
{% set strategy = strategy_macro(model, "snapshotted_data", "source_data", config, target_relation_exists) %}
{% set strategy = strategy_macro(model, "snapshotted_data", "source_data", model['config'], target_relation_exists) %}
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I don't think these are the same config. There's config in the globals, and then there's also config.model.config. Was there a bug or an issue that required this change?

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Yes. I'm not sure why somebody was using the passed in config to start with (I suspect it was because using defaults is different for the config object and the config dictionary that got passed in), but you can't get a "property" from the dictionary, only the config object that you get from the context.


{% if not target_relation_exists %}

Expand All @@ -135,7 +135,9 @@

{% else %}

{{ adapter.valid_snapshot_target(target_relation) }}
{% set columns = config.get("snapshot_table_column_names") or get_snapshot_table_column_names() %}

{{ adapter.valid_snapshot_target(target_relation, columns) }}

{% set staging_table = spark_build_snapshot_staging_table(strategy, sql, target_relation) %}

Expand Down
2 changes: 1 addition & 1 deletion setup.py
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Expand Up @@ -66,7 +66,7 @@ def _get_plugin_version_dict():
install_requires=[
"sqlparams>=3.0.0",
"dbt-common>=1.0.4,<2.0",
"dbt-adapters>=1.1.1,<2.0",
"dbt-adapters>=1.7.0,<2.0",
# add dbt-core to ensure backwards compatibility of installation, this is not a functional dependency
"dbt-core>=1.8.0",
],
Expand Down
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