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Add fewer_rows_than schema test (#343)
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integration_tests/data/schema_tests/data_test_fewer_rows_than_table_1.csv
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integration_tests/data/schema_tests/data_test_fewer_rows_than_table_2.csv
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integration_tests/models/schema_tests/test_fewer_rows_than.sql
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with data as ( | ||
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select * from {{ ref('data_test_fewer_rows_than_table_1') }} | ||
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) | ||
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select | ||
field | ||
from data |
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{% macro test_fewer_rows_than(model) %} | ||
{{ return(adapter.dispatch('test_fewer_rows_than', packages = dbt_utils._get_utils_namespaces())(model, combination_of_columns, quote_columns, where)) }} | ||
{% endmacro %} | ||
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{% macro default__test_fewer_rows_than(model) %} | ||
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{% set compare_model = kwargs.get('compare_model', kwargs.get('arg')) %} | ||
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with a as ( | ||
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select count(*) as count_ourmodel from {{ model }} | ||
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), | ||
b as ( | ||
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select count(*) as count_comparisonmodel from {{ compare_model }} | ||
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), | ||
counts as ( | ||
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select | ||
(select count_ourmodel from a) as count_model_with_fewer_rows, | ||
(select count_comparisonmodel from b) as count_model_with_more_rows | ||
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), | ||
final as ( | ||
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select | ||
case | ||
-- fail the test if we have more rows than the reference model and return the row count delta | ||
when count_model_with_fewer_rows > count_model_with_more_rows then (count_model_with_fewer_rows - count_model_with_more_rows) | ||
-- fail the test if they are the same number | ||
when count_model = count_comparison then 1 | ||
-- pass the test if the delta is positive (i.e. return the number 0) | ||
else 0 | ||
end as row_count_delta | ||
from counts | ||
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) | ||
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select row_count_delta from final | ||
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{% endmacro %} |