etr2460 commented on a change in pull request #7641: [SQL Lab] Clarify SQL Lab
query and display limits
URL:
https://github.com/apache/incubator-superset/pull/7641#discussion_r291776703
##########
File path: superset/views/utils.py
##########
@@ -184,3 +185,23 @@ def get_datasource_info(datasource_id, datasource_type,
form_data):
'The datasource associated with this chart no longer exists')
datasource_id = int(datasource_id)
return datasource_id, datasource_type
+
+
+def apply_display_max_row_limit(sql_results):
+ """
+ Given a `sql_results` nested structure, applies a limit to the number of
rows
+
+ `sql_results` here is the nested structure coming out of
sql_lab.get_sql_results, it
+ contains metadata about the query, as well as the data set returned by the
query.
+ This method limits the number of rows adds a `displayLimitReached: True`
flag to the
+ metadata.
+ """
+ display_limit = app.config.get('DISPLAY_MAX_ROW')
+ if (
+ display_limit and
+ sql_results['status'] == QueryStatus.SUCCESS and
+ display_limit < sql_results['query']['rows']
+ ):
+ sql_results['data'] = sql_results['data'][:display_limit]
+ sql_results['displayLimitReached'] = True
+ return sql_results
Review comment:
I'm returning it so I can call the function inline. And types added!
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