feat: add show_sample_rows tag to override PII-based sample hiding

Adds a new tag mechanism that is the inverse of the existing PII tag
behavior. When enable_samples_on_show_sample_rows_tags is true, models
or columns tagged with show_sample_rows will have their samples shown
even when PII tags would otherwise suppress them.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: joostboon

macros/edr/materializations/test/test.sql

@@ -76,9 +76,11 @@
     {% endif %}
 
     {% if disable_test_samples %} {% set sample_limit = 0 %}
-    {% elif elementary.is_pii_table(flattened_test) %} {% set sample_limit = 0 %}
-    {% elif elementary.should_disable_sampling_for_pii(flattened_test) %}
-        {% set sample_limit = 0 %}
+    {% elif not elementary.is_show_sample_rows_table(flattened_test) %}
+        {% if elementary.is_pii_table(flattened_test) %} {% set sample_limit = 0 %}
+        {% elif elementary.should_disable_sampling_for_pii(flattened_test) %}
+            {% set sample_limit = 0 %}
+        {% endif %}
     {% endif %}
 
     {% set result_rows = elementary.query_test_result_rows(

macros/edr/system/system_utils/get_config_var.sql

@@ -143,6 +143,8 @@
         "anomaly_exclude_metrics": none,
         "disable_samples_on_pii_tags": false,
         "pii_tags": ["pii"],
+        "enable_samples_on_show_sample_rows_tags": false,
+        "show_sample_rows_tags": ["show_sample_rows"],
         "bigquery_disable_partitioning": false,
         "bigquery_disable_clustering": false,
         "upload_only_current_project_artifacts": false,

macros/edr/system/system_utils/get_pii_columns_from_parent_model.sql

@@ -38,9 +38,21 @@
     {% set column_nodes = parent_model.get("columns") %}
     {% if not column_nodes %} {% do return(pii_columns) %} {% endif %}
 
+    {% set enable_show_tags = elementary.get_config_var("enable_samples_on_show_sample_rows_tags") %}
+    {% set raw_show_tags = elementary.get_config_var("show_sample_rows_tags") %}
+    {% set show_tags = (
+        (raw_show_tags if raw_show_tags is iterable else [raw_show_tags])
+        | map("lower") | list
+    ) %}
+
     {% for column_node in column_nodes.values() %}
         {% set all_column_tags_lower = elementary.get_column_tags(column_node) %}
 
+        {# Skip columns explicitly tagged to show sample rows (if feature is enabled) #}
+        {% if enable_show_tags and elementary.lists_intersection(all_column_tags_lower, show_tags) | length > 0 %}
+            {% continue %}
+        {% endif %}
+
         {% for pii_tag in pii_tags %}
             {% if pii_tag in all_column_tags_lower %}
                 {% do pii_columns.append(column_node.get("name")) %} {% break %}

macros/edr/system/system_utils/is_show_sample_rows_table.sql

@@ -0,0 +1,24 @@
+{% macro is_show_sample_rows_table(flattened_test) %}
+    {% if not elementary.get_config_var("enable_samples_on_show_sample_rows_tags") %}
+        {% do return(false) %}
+    {% endif %}
+
+    {% set raw_show_tags = elementary.get_config_var("show_sample_rows_tags") %}
+    {% set show_tags = (
+        (raw_show_tags if raw_show_tags is iterable else [raw_show_tags])
+        | map("lower")
+        | list
+    ) %}
+
+    {% set raw_model_tags = elementary.insensitive_get_dict_value(
+        flattened_test, "model_tags", []
+    ) %}
+    {% set model_tags = (
+        (raw_model_tags if raw_model_tags is iterable else [raw_model_tags])
+        | map("lower")
+        | list
+    ) %}
+
+    {% set intersection = elementary.lists_intersection(model_tags, show_tags) %}
+    {% do return(intersection | length > 0) %}
+{% endmacro %}