Add session date param; fix checks CLI bug (#4579)

* Fix checks to filter on partitions

* Don't print "missing checks file" on success

Previously, the statement that checks.sql files
were missing was printed on any execution of the for
statement. ("else" clauses after "for"s execute after
completion of the "for" clause).

Instead, we want to print only when there are no files.

bigquery_etl/cli/utils.py

@@ -87,13 +87,14 @@ def paths_matching_checks_pattern(
         pattern, sql_path, project_id, ["checks.sql"], CHECKS_FILE_RE
     )
 
-    for checks_file in checks_files:
-        match = CHECKS_FILE_RE.match(str(checks_file))
-        if match:
-            project = match.group(1)
-            dataset = match.group(2)
-            table = match.group(3)
-        yield checks_file, project, dataset, table
+    if checks_files:
+        for checks_file in checks_files:
+            match = CHECKS_FILE_RE.match(str(checks_file))
+            if match:
+                project = match.group(1)
+                dataset = match.group(2)
+                table = match.group(3)
+            yield checks_file, project, dataset, table
     else:
         print(f"No checks.sql file found in {sql_path}/{project_id}/{pattern}")
 

sql/moz-fx-data-shared-prod/mozilla_org_derived/ga_sessions_v1/checks.sql

@@ -1,7 +1,7 @@
 #fail
 -- ga_session_id should be unique across all partitions
-{{ is_unique(["ga_session_id"]) }}
+{{ is_unique(["ga_session_id"], "session_date = @session_date") }}
 
 #fail
-{{ min_row_count(10000) }}
+{{ min_row_count(100, "session_date = @session_date") }}