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Update trino__get_columns_in_relation to use information_schema.columns #444

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Update trino__get_columns_in_relation to use information_schema.columns #444

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7 changes: 7 additions & 0 deletions .changes/unreleased/Under the Hood-20241105-083613.yaml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,7 @@
kind: Under the Hood
body: Update trino__get_columns_in_relation to use information_schema.columns
time: 2024-11-05T08:36:13.788945-05:00
custom:
Author: posulliv
Issue: "443"
PR: "444"
9 changes: 7 additions & 2 deletions dbt/include/trino/macros/adapters.sql
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Expand Up @@ -5,7 +5,12 @@

{% macro trino__get_columns_in_relation(relation) -%}
{%- set sql -%}
describe {{ relation }}
select column_name, data_type
from {{ relation.information_schema() }}.columns
where
table_catalog = '{{ relation.database | lower }}'
and table_schema = '{{ relation.schema | lower }}'
and table_name = '{{ relation.identifier | lower}}'
{%- endset -%}
{%- set result = run_query(sql) -%}

Expand All @@ -20,7 +25,7 @@

{% set columns = [] %}
{% for row in result %}
{% do columns.append(api.Column.from_description(row['Column'].lower(), row['Type'])) %}
{% do columns.append(api.Column.from_description(row['column_name'].lower(), row['data_type'])) %}
{% endfor %}
{% do return(columns) %}
{% endmacro %}
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