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Add table expiry #230

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@thomas-vl thomas-vl commented Aug 21, 2023

Description & motivation

Add hours_to_expiration as an option to external tables in bigquery
resolves: #225

version: 2

sources:
  - name: test
    loader: gcloud storage
    dataset: "{{ target.dataset }}"
    tables:
      - name: test
        description: Sheet
        external:
          hours_to_expiration: 24
          location: 'https://docs.google.com/spreadsheets/d/id'
          options:
            format: google_sheets
            skip_leading_rows: 1
            sheet_range: 'sheetrange'
        columns:
          - name: column_name
            data_type: STRING
            description: "Column Name"

Checklist

  • I have verified that these changes work locally
  • I have updated the README.md (if applicable)
  • I have added an integration test for my fix/feature (if applicable)

@thomas-vl thomas-vl requested a review from jeremyyeo as a code owner August 21, 2023 08:58
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hours_to_expiration should be nested within options, just as the now merged max_staleness does. accordingly this new clause should be adjusted to happen within the existing options loop, as described below.

if not a CETAS options clause, to what does dbt's external.options pertain?

@@ -4,11 +4,11 @@
{%- set external = source_node.external -%}
{%- set partitions = external.partitions -%}
{%- set options = external.options -%}

{%- set hours_to_expiration = external.get('hours_to_expiration') -%}
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i believe this is all that is needed

Suggested change
{%- set hours_to_expiration = external.get('hours_to_expiration') -%}
{%- set hours_to_expiration = external.hours_to_expiration -%}

@@ -45,5 +45,8 @@
{%- endif -%}
{%- endfor -%}
{%- endif -%}
{%- if hours_to_expiration -%}
, expiration_timestamp = TIMESTAMP_ADD(CURRENT_TIMESTAMP(), INTERVAL {{hours_to_expiration}} hour)
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can we integrate this into the already existing enumeration of options.items() (L39-L47)? perhaps something like the below?

this solution isn't very clean either though, imho. I thought to use the fancy jinja loop.first to exclude the leading comma in the first example, but expiration_timestamp will never be first in the list of options as uris are a required option. 😵 . perhaps we could refactor so that the currently unused external field is where uris are given??

            {%- if options is mapping -%}
            {%- for key, value in options.items() if key != 'uris' %}
                {%- if value is string -%}
                    , {{key}} = '{{value}}'
                {%- else -%}
                    {%- if key == "hours_to_expiration" -%}
                        , expiration_timestamp = TIMESTAMP_ADD(CURRENT_TIMESTAMP(), INTERVAL {{hours_to_expiration}} hour)
                    {%- else -%}
                        , {{key}} = {{value}}
                {%- endif -%}
            {%- endfor -%}
            {%- endif -%}

@dataders
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dataders commented Apr 5, 2024

any progress on this @thomas-vl?

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@thomas-vl have you had a chance to consider my feedback from the previous review?

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This PR has been marked as Stale because it has been open with no activity as of late. If you would like the PR to remain open, please comment on the PR or else it will be closed in 7 days.

@github-actions github-actions bot added the Stale label Oct 10, 2024
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DBT 'hours_to_expiration' on table [BigQuery]
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