Hello,
I'm trying to query in a MongoDB with Metabase 1.45.2. If I select, like in the image, at least one field inside the nested document.
It fails like this:
[111a1248-72c2-4544-9669-cdf8147fd777] 2023-01-18T14:19:42+01:00 ERROR metabase.query-processor.middleware.catch-exceptions Errore elaborazione query: Errore nell'esecuzione della query
{:database_id 6,
:started_at #t "2023-01-18T13:19:41.774075Z[UTC]",
:via
[{:status :failed,
:class clojure.lang.ExceptionInfo,
:error "Error reducing result rows: null",
:stacktrace
["--> query_processor.context.default$default_reducef$fn__39686.invoke(default.clj:59)"
"query_processor.context.default$default_reducef.invokeStatic(default.clj:56)"
"query_processor.context.default$default_reducef.invoke(default.clj:48)"
"query_processor.context$reducef.invokeStatic(context.clj:69)"
"query_processor.context$reducef.invoke(context.clj:62)"
"query_processor.context.default$default_runf$respond_STAR___39690.invoke(default.clj:68)"
"driver.mongo.execute$reduce_results.invokeStatic(execute.clj:138)"
"driver.mongo.execute$reduce_results.invoke(execute.clj:131)"
"driver.mongo.execute$execute_reducible_query.invokeStatic(execute.clj:169)"
"driver.mongo.execute$execute_reducible_query.invoke(execute.clj:157)"
"driver.mongo$fn__98833$f__97136__auto____98834.invoke(mongo.clj:246)"
"driver.mongo.util$do_with_mongo_connection$fn__97127.invoke(util.clj:226)"
"util.ssh$do_with_ssh_tunnel.invokeStatic(ssh.clj:139)"
"util.ssh$do_with_ssh_tunnel.invoke(ssh.clj:128)"
"driver.mongo.util$do_with_mongo_connection.invokeStatic(util.clj:220)"
"driver.mongo.util$do_with_mongo_connection.invoke(util.clj:215)"
"driver.mongo$fn__98833.invokeStatic(mongo.clj:245)"
"driver.mongo$fn__98833.invoke(mongo.clj:243)"
"query_processor.context$executef.invokeStatic(context.clj:59)"
"query_processor.context$executef.invoke(context.clj:48)"
"query_processor.context.default$default_runf.invokeStatic(default.clj:67)"
"query_processor.context.default$default_runf.invoke(default.clj:65)"
"query_processor.context$runf.invokeStatic(context.clj:45)"
"query_processor.context$runf.invoke(context.clj:39)"
"query_processor.reducible$identity_qp.invokeStatic(reducible.clj:12)"
"query_processor.reducible$identity_qp.invoke(reducible.clj:9)"
"query_processor.middleware.cache$maybe_return_cached_results$maybe_return_cached_results_STAR___53569.invoke(cache.clj:220)"
"query_processor.middleware.permissions$check_query_permissions$fn__49259.invoke(permissions.clj:109)"
"metabase_enterprise.advanced_permissions.query_processor.middleware.permissions$check_download_permissions$fn__89280.invoke(permissions.clj:124)"
"metabase_enterprise.sandbox.query_processor.middleware.column_level_perms_check$maybe_apply_column_level_perms_check$fn__90357.invoke(column_level_perms_check.clj:30)"
"query_processor.middleware.mbql_to_native$mbql__GT_native$fn__52514.invoke(mbql_to_native.clj:23)"
"query_processor$fn__55045$combined_post_process__55050$combined_post_process_STAR___55051.invoke(query_processor.clj:212)"
"query_processor$fn__55045$combined_pre_process__55046$combined_pre_process_STAR___55047.invoke(query_processor.clj:209)"
"query_processor.middleware.resolve_database_and_driver$resolve_database_and_driver$fn__53490$fn__53495.invoke(resolve_database_and_driver.clj:35)"
"driver$do_with_driver.invokeStatic(driver.clj:76)"
"driver$do_with_driver.invoke(driver.clj:72)"
"query_processor.middleware.resolve_database_and_driver$resolve_database_and_driver$fn__53490.invoke(resolve_database_and_driver.clj:34)"
"query_processor.middleware.fetch_source_query$resolve_card_id_source_tables$fn__49525.invoke(fetch_source_query.clj:314)"
"query_processor.middleware.store$initialize_store$fn__49715$fn__49716.invoke(store.clj:11)"
"query_processor.store$do_with_store.invokeStatic(store.clj:45)"
"query_processor.store$do_with_store.invoke(store.clj:39)"
"query_processor.middleware.store$initialize_store$fn__49715.invoke(store.clj:10)"
"query_processor.middleware.normalize_query$normalize$fn__53762.invoke(normalize_query.clj:22)"
"metabase_enterprise.audit_app.query_processor.middleware.handle_audit_queries$handle_internal_queries$fn__60502.invoke(handle_audit_queries.clj:130)"
"query_processor.middleware.constraints$add_default_userland_constraints$fn__50803.invoke(constraints.clj:53)"
"query_processor.middleware.process_userland_query$process_userland_query$fn__53701.invoke(process_userland_query.clj:145)"
"query_processor.middleware.catch_exceptions$catch_exceptions$fn__54073.invoke(catch_exceptions.clj:167)"
"query_processor.reducible$async_qp$qp_STAR___45514$thunk__45516.invoke(reducible.clj:100)"
"query_processor.reducible$async_qp$qp_STAR___45514.invoke(reducible.clj:106)"
"query_processor.reducible$async_qp$qp_STAR___45514.invoke(reducible.clj:91)"
"query_processor.reducible$sync_qp$qp_STAR___45525.doInvoke(reducible.clj:126)"
"query_processor$process_userland_query.invokeStatic(query_processor.clj:331)"
"query_processor$process_userland_query.doInvoke(query_processor.clj:327)"
"query_processor$fn__55092$process_query_and_save_execution_BANG___55101$fn__55104.invoke(query_processor.clj:342)"
"query_processor$fn__55092$process_query_and_save_execution_BANG___55101.invoke(query_processor.clj:335)"
"query_processor$fn__55136$process_query_and_save_with_max_results_constraints_BANG___55145$fn__55148.invoke(query_processor.clj:354)"
"query_processor$fn__55136$process_query_and_save_with_max_results_constraints_BANG___55145.invoke(query_processor.clj:347)"
"api.dataset$run_query_async$fn__71225.invoke(dataset.clj:69)"
"query_processor.streaming$streaming_response_STAR_$fn__40610$fn__40611.invoke(streaming.clj:162)"
"query_processor.streaming$streaming_response_STAR_$fn__40610.invoke(streaming.clj:161)"
"async.streaming_response$do_f_STAR_.invokeStatic(streaming_response.clj:65)"
"async.streaming_response$do_f_STAR_.invoke(streaming_response.clj:63)"
"async.streaming_response$do_f_async$task__20021.invoke(streaming_response.clj:84)"],
:error_type :qp,
:ex-data {:type :qp}}],
:error_type :qp,
:json_query
{:type "query",
:query {:source-table 30, :fields [["field" 454 nil]]},
:database 6,
:parameters [],
:middleware {:js-int-to-string? true, :add-default-userland-constraints? true}},
:native
{:projections ("event_datum.params.message"),
:query [{"$project" {"_id" false, "event_datum.params.message" "$event_datum.params.message"}} {"$limit" 1048575}],
:collection "events",
:mbql? true},
:status :failed,
:class java.lang.ClassCastException,
:stacktrace [nil],
:card_id nil,
:context :ad-hoc,
:error nil,
:row_count 0,
:running_time 0,
:preprocessed
{:type :query,
:query
{:source-table 30,
:fields [[:field 454 nil]],
:limit 1048575,
:metabase.query-processor.middleware.limit/original-limit nil},
:database 6,
:middleware {:js-int-to-string? true, :add-default-userland-constraints? true},
:info {:executed-by 2, :context :ad-hoc}},
:data {:rows [], :cols []}}
In other topics I found the issue "Error reducing result rows: null" was solved by upgrading, so I did it from 1.44.6 to 1.45.2, but it' still present.
How to solve?
