CloudWatch Logs: "limit" query command now respected (#25486)

Closes #25182

pkg/tsdb/cloudwatch/log_actions.go

@@ -200,13 +200,19 @@ func (e *CloudWatchExecutor) executeStartQuery(ctx context.Context, logsClient c
 	// so that a row's context can be retrieved later if necessary.
 	// The usage of ltrim around the @log/@logStream fields is a necessary workaround, as without it,
 	// CloudWatch wouldn't consider a query using a non-alised @log/@logStream valid.
+	modifiedQueryString := "fields @timestamp,ltrim(@log) as " + logIdentifierInternal + ",ltrim(@logStream) as " + logStreamIdentifierInternal + "|" + parameters.Get("queryString").MustString("")
+
 	startQueryInput := &cloudwatchlogs.StartQueryInput{
 		StartTime:     aws.Int64(startTime.Unix()),
 		EndTime:       aws.Int64(endTime.Unix()),
-		Limit:         aws.Int64(parameters.Get("limit").MustInt64(1000)),
 		LogGroupNames: aws.StringSlice(parameters.Get("logGroupNames").MustStringArray()),
-		QueryString:   aws.String("fields @timestamp,ltrim(@log) as " + logIdentifierInternal + ",ltrim(@logStream) as " + logStreamIdentifierInternal + "|" + parameters.Get("queryString").MustString("")),
+		QueryString:   aws.String(modifiedQueryString),
+	}
+
+	if resultsLimit, err := parameters.Get("limit").Int64(); err == nil {
+		startQueryInput.Limit = aws.Int64(resultsLimit)
 	}
+
 	return logsClient.StartQueryWithContext(ctx, startQueryInput)
 }