changefeedccl/kvfeed: add log for table that encountered schema change

This patch adds a log documenting the table(s) that encountered schema
changes and caused the kv feed to restart/exit, which will be useful
for debugging.

Release note: None

Author: andyyang890

pkg/ccl/changefeedccl/kvfeed/BUILD.bazel

@@ -36,6 +36,7 @@ go_library(
         "//pkg/util/span",
         "//pkg/util/timeutil",
         "@com_github_cockroachdb_errors//:errors",
+        "@com_github_cockroachdb_redact//:redact",
     ],
 )
 

pkg/ccl/changefeedccl/kvfeed/kv_feed.go

@@ -31,6 +31,7 @@ import (
 	"github.com/cockroachdb/cockroach/pkg/util/span"
 	"github.com/cockroachdb/cockroach/pkg/util/timeutil"
 	"github.com/cockroachdb/errors"
+	"github.com/cockroachdb/redact"
 )
 
 // MonitoringConfig is a set of callbacks which the kvfeed calls to provide
@@ -392,8 +393,15 @@ func (f *kvFeed) run(ctx context.Context) (err error) {
 			return err
 		}
 		if log.V(2) {
-			log.Infof(ctx, "kv feed encountered table events: %#v", events)
+			log.Infof(ctx, "kv feed encountered table events at or before %s: %#v", schemaChangeTS, events)
 		}
+		var tables []redact.RedactableString
+		for _, event := range events {
+			tables = append(tables, redact.Sprintf("table %q (id %d, version %d -> %d)",
+				redact.Safe(event.Before.GetName()), event.Before.GetID(), event.Before.GetVersion(), event.After.GetVersion()))
+		}
+		log.Infof(ctx, "kv feed encountered schema change(s) at or before %s: %s",
+			schemaChangeTS, redact.Join(", ", tables))
 
 		// Detect whether the event corresponds to a primary index change. Also
 		// detect whether the change corresponds to any change in the set of visible