Fix cost (for methods cromwell), add explicit example

README.md

@@ -110,6 +110,15 @@ Cromshell is a CLI for submitting workflows to a Cromwell server and monitoring/
      * Requires the `bq_cost_table` key to exist in the cromshell 
        configuration file and have a value equal to the BigQuery cost table 
        for your GCP billing project.
+       * For example, using the Methods cromwell server, your `~/.cromshell/cromshell_config.json` 
+         should be as follows:
+         ```json
+         {
+           "cromwell_server": "https://cromwell-v77.dsde-methods.broadinstitute.org/",
+           "requests_timeout": 5,
+           "bq_cost_table": "Methods_billing_dump.gcp_billing_export_v1_009C7D_923007_219A6F"
+         }
+         ```
      * `-c/--color` Color outliers in task level cost results.
      * `-d/--detailed` Get the cost for a workflow at the task level.
 

src/cromshell/cost/command.py

@@ -182,15 +182,15 @@ def create_bq_query(detailed: bool, bq_cost_table: str) -> str:
                 AND task.key LIKE "wdl-task-name"
                 AND wfid.key LIKE "cromwell-workflow-id"
                 AND wfid.value like @workflow_id
-                AND partition_time BETWEEN @start_date AND @end_date
+                AND export_time BETWEEN @start_date AND @end_date
                 GROUP BY 1,2,3
                 ORDER BY 4 DESC
                 """
     else:
         return f"""
                 SELECT sum(cost) as cost
                 FROM {bq_cost_table}, UNNEST(labels)
-                WHERE value LIKE @workflow_id AND partition_time BETWEEN @start_date AND @end_date
+                WHERE value LIKE @workflow_id AND export_time BETWEEN @start_date AND @end_date
                 """