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#23 #26 Improve error handling for relation macros #27

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merged 1 commit into from
Apr 29, 2022
Merged

#23 #26 Improve error handling for relation macros #27

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57 changes: 29 additions & 28 deletions dbt/include/impala/macros/adapters.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -196,48 +196,49 @@

{% macro is_relation_present(relation) -%}
{% set result_set = run_query('show tables in ' ~ relation.schema ~ ' like "' ~ relation.identifier ~ '"') %}
{%- if result_set.rows -%}
{% do return(true) %}
{% else %}
{% do return(false) %}
{% endif %}

{% if execute %}
{%- for rs in result_set -%}
{% do return(true) %}
{%- endfor -%}
{%- endif -%}

{% do return(false) %}
{% endmacro %}

{% macro get_relation_type(relation) -%}
{% set rel_type = 'table' %}
{% set relation_exists = is_relation_present(relation) %}

{%- if not relation_exists -%}
{% do return(rel_type) %}
{%- endif -%}

{% set result_set = run_query('describe extended ' ~ relation) %}
{%- if relation_exists -%}
{% set result_set = run_query('describe extended ' ~ relation) %}

{% if execute %}
{%- for rs in result_set -%}
{%- if rs[0].startswith('Table Type') -%}
{%- if rs[1].startswith('VIRTUAL_VIEW') -%}
{% set rel_type = 'view' %}
{% do return(rel_type) %}
{%- elif rs[1].startswith('MANAGED_TABLE') -%}
{% set rel_type = 'table' %}
{% do return(rel_type) %}
{%- elif rs[1].startswith('EXTERNAL_TABLE') -%}
{% set rel_type = 'table' %}
{% do return(rel_type) %}
{% if execute %}
{%- for rs in result_set -%}
{%- if rs[0].startswith('Table Type') -%}
{%- if rs[1].startswith('VIRTUAL_VIEW') -%}
{% set rel_type = 'view' %}
{% do return(rel_type) %}
{%- elif rs[1].startswith('MANAGED_TABLE') -%}
{% set rel_type = 'table' %}
{% do return(rel_type) %}
{%- elif rs[1].startswith('EXTERNAL_TABLE') -%}
{% set rel_type = 'table' %}
{% do return(rel_type) %}
{%- endif -%}
{%- endif -%}
{%- endif -%}
{%- endfor -%}
{% endif %}

{%- endfor -%}
{%- endif -%}
{%- endif -%}
{% do return(rel_type) %}
{% endmacro %}

{% macro impala__rename_relation(from_relation, to_relation) -%}
{% set from_rel_type = get_relation_type(from_relation) %}

{% call statement('drop_relation') %}
drop {{ to_relation.type }} if exists {{ to_relation }}
drop {{ from_rel_type }} if exists {{ to_relation }}
{% endcall %}
{% call statement('rename_relation') -%}
{% if not from_rel_type %}
Expand Down