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Dont drop tables in incremental append runs #365

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Dont drop tables in incremental append runs #365

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12 changes: 8 additions & 4 deletions dbt/include/clickhouse/macros/materializations/incremental/incremental.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -20,9 +20,14 @@
{%- set backup_relation = make_backup_relation(target_relation, backup_relation_type) -%}
{%- set preexisting_intermediate_relation = load_cached_relation(intermediate_relation)-%}
{%- set preexisting_backup_relation = load_cached_relation(backup_relation) -%}

{{ drop_relation_if_exists(preexisting_intermediate_relation) }}
{{ drop_relation_if_exists(preexisting_backup_relation) }}
{% set incremental_strategy = adapter.calculate_incremental_strategy(config.get('incremental_strategy')) %}

{% if not full_refresh_mode and incremental_strategy == 'append' %}
-- skip dropping tables for incremental append runs.
{% else %}
{{ drop_relation_if_exists(preexisting_intermediate_relation) }}
{{ drop_relation_if_exists(preexisting_backup_relation) }}
{% endif %}

{{ run_hooks(pre_hooks, inside_transaction=False) }}
{{ run_hooks(pre_hooks, inside_transaction=True) }}
Expand Down Expand Up @@ -55,7 +60,6 @@

{% else %}
{% set column_changes = none %}
{% set incremental_strategy = adapter.calculate_incremental_strategy(config.get('incremental_strategy')) %}
{% set incremental_predicates = config.get('predicates', none) or config.get('incremental_predicates', none) %}
{%- if on_schema_change != 'ignore' %}
{%- set column_changes = adapter.check_incremental_schema_changes(on_schema_change, existing_relation, sql) -%}
Expand Down