51 lines
1.5 KiB
MySQL
51 lines
1.5 KiB
MySQL
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/*
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Query all columns in two models, reduce the table to a content hash and compare
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the hashes across both.
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You must pass a col name that exists in both models to sort them in order to
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make serialization stable. It is recommended to pass the PK.
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*/
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{% macro compare_table_hashes(model_1, model_2, order_by_col) %}
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{% set table_1 = ref(model_1) %}
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{% set table_2 = ref(model_2) %}
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{# Build query 1 #}
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{% set query_1 %}
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SELECT md5(array_agg(md5((t1.*)::varchar))::varchar) AS hash_val
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FROM (
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SELECT *
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FROM {{ table_1 }}
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ORDER BY {{ order_by_col }}
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) AS t1
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{% endset %}
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{# Build query 2 #}
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{% set query_2 %}
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SELECT md5(array_agg(md5((t1.*)::varchar))::varchar) AS hash_val
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FROM (
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SELECT *
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FROM {{ table_2 }}
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ORDER BY {{ order_by_col }}
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) AS t1
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{% endset %}
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{# Execute queries #}
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{% set result_1 = run_query(query_1) %}
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{% set result_2 = run_query(query_2) %}
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{% if result_1 and result_2 %}
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{% set hash_1 = result_1.columns[0].values()[0] %}
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{% set hash_2 = result_2.columns[0].values()[0] %}
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{{ log("Hash for " ~ model_1 ~ ": " ~ hash_1, info=True) }}
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{{ log("Hash for " ~ model_2 ~ ": " ~ hash_2, info=True) }}
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{% if hash_1 == hash_2 %} {{ log("✅ Table hashes match!", info=True) }}
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{% else %} {{ log("❌ Table hashes do NOT match!", info=True) }}
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{% endif %}
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{% else %}
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{{ log("❗ Could not retrieve hashes for one or both models.", info=True) }}
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{% endif %}
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{% endmacro %}
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