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vendor/cloud.google.com/go/examples/bigquery/query/main.go

@@ -0,0 +1,98 @@
+// Copyright 2015 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// query is an example client of the bigquery client library.
+// It submits a query and writes the result to a table.
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+	"time"
+
+	"cloud.google.com/go/bigquery"
+	"golang.org/x/net/context"
+)
+
+var (
+	project = flag.String("project", "", "The ID of a Google Cloud Platform project")
+	dataset = flag.String("dataset", "", "The ID of a BigQuery dataset")
+	q       = flag.String("q", "", "The query string")
+	dest    = flag.String("dest", "", "The ID of the BigQuery table to write the result to.  If unset, an ephemeral table ID will be generated.")
+	pollint = flag.Duration("pollint", 10*time.Second, "Polling interval for checking job status")
+	wait    = flag.Bool("wait", false, "Whether to wait for the query job to complete.")
+)
+
+func main() {
+	flag.Parse()
+
+	flagsOk := true
+	for _, f := range []string{"project", "dataset", "q"} {
+		if flag.Lookup(f).Value.String() == "" {
+			fmt.Fprintf(os.Stderr, "Flag --%s is required\n", f)
+			flagsOk = false
+		}
+	}
+	if !flagsOk {
+		os.Exit(1)
+	}
+
+	ctx := context.Background()
+	client, err := bigquery.NewClient(ctx, *project)
+	if err != nil {
+		log.Fatalf("Creating bigquery client: %v", err)
+	}
+
+	query := client.Query(*q)
+	query.DefaultProjectID = *project
+	query.DefaultDatasetID = *dataset
+	query.WriteDisposition = bigquery.WriteTruncate
+
+	if *dest != "" {
+		query.Dst = client.Dataset(*dataset).Table(*dest)
+	}
+
+	// Query data.
+	job, err := query.Run(ctx)
+
+	if err != nil {
+		log.Fatalf("Querying: %v", err)
+	}
+
+	fmt.Printf("Submitted query. Job ID: %s\n", job.ID())
+	if !*wait {
+		return
+	}
+
+	fmt.Printf("Waiting for job to complete.\n")
+
+	for range time.Tick(*pollint) {
+		status, err := job.Status(ctx)
+		if err != nil {
+			fmt.Printf("Failure determining status: %v", err)
+			break
+		}
+		if !status.Done() {
+			continue
+		}
+		if err := status.Err(); err == nil {
+			fmt.Printf("Success\n")
+		} else {
+			fmt.Printf("Failure: %+v\n", err)
+		}
+		break
+	}
+}