forked from TrueCloudLab/distribution
90 lines
2.9 KiB
Go
90 lines
2.9 KiB
Go
|
// 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.
|
||
|
|
|
||
|
|
package bigquery
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
|
||
|
|
"golang.org/x/net/context"
|
||
|
|
bq "google.golang.org/api/bigquery/v2"
|
||
|
|
)
|
||
|
|
|
||
|
|
type queryOption interface {
|
||
|
|
customizeQuery(conf *bq.JobConfigurationQuery, projectID string)
|
||
|
|
}
|
||
|
|
|
||
|
|
// DisableQueryCache returns an Option that prevents results being fetched from the query cache.
|
||
|
|
// If this Option is not used, results are fetched from the cache if they are available.
|
||
|
|
// The query cache is a best-effort cache that is flushed whenever tables in the query are modified.
|
||
|
|
// Cached results are only available when TableID is unspecified in the query's destination Table.
|
||
|
|
// For more information, see https://cloud.google.com/bigquery/querying-data#querycaching
|
||
|
|
func DisableQueryCache() Option { return disableQueryCache{} }
|
||
|
|
|
||
|
|
type disableQueryCache struct{}
|
||
|
|
|
||
|
|
func (opt disableQueryCache) implementsOption() {}
|
||
|
|
|
||
|
|
func (opt disableQueryCache) customizeQuery(conf *bq.JobConfigurationQuery, projectID string) {
|
||
|
|
f := false
|
||
|
|
conf.UseQueryCache = &f
|
||
|
|
}
|
||
|
|
|
||
|
|
// JobPriority returns an Option that causes a query to be scheduled with the specified priority.
|
||
|
|
// The default priority is InteractivePriority.
|
||
|
|
// For more information, see https://cloud.google.com/bigquery/querying-data#batchqueries
|
||
|
|
func JobPriority(priority string) Option { return jobPriority(priority) }
|
||
|
|
|
||
|
|
type jobPriority string
|
||
|
|
|
||
|
|
func (opt jobPriority) implementsOption() {}
|
||
|
|
|
||
|
|
func (opt jobPriority) customizeQuery(conf *bq.JobConfigurationQuery, projectID string) {
|
||
|
|
conf.Priority = string(opt)
|
||
|
|
}
|
||
|
|
|
||
|
|
const (
|
||
|
|
BatchPriority = "BATCH"
|
||
|
|
InteractivePriority = "INTERACTIVE"
|
||
|
|
)
|
||
|
|
|
||
|
|
// TODO(mcgreevy): support large results.
|
||
|
|
// TODO(mcgreevy): support non-flattened results.
|
||
|
|
|
||
|
|
func (c *Client) query(ctx context.Context, dst *Table, src *Query, options []Option) (*Job, error) {
|
||
|
|
job, options := initJobProto(c.projectID, options)
|
||
|
|
payload := &bq.JobConfigurationQuery{}
|
||
|
|
|
||
|
|
dst.customizeQueryDst(payload, c.projectID)
|
||
|
|
src.customizeQuerySrc(payload, c.projectID)
|
||
|
|
|
||
|
|
for _, opt := range options {
|
||
|
|
o, ok := opt.(queryOption)
|
||
|
|
if !ok {
|
||
|
|
return nil, fmt.Errorf("option (%#v) not applicable to dst/src pair: dst: %T ; src: %T", opt, dst, src)
|
||
|
|
}
|
||
|
|
o.customizeQuery(payload, c.projectID)
|
||
|
|
}
|
||
|
|
|
||
|
|
job.Configuration = &bq.JobConfiguration{
|
||
|
|
Query: payload,
|
||
|
|
}
|
||
|
|
j, err := c.service.insertJob(ctx, job, c.projectID)
|
||
|
|
if err != nil {
|
||
|
|
return nil, err
|
||
|
|
}
|
||
|
|
j.isQuery = true
|
||
|
|
return j, nil
|
||
|
|
}
|