/
table.go
92 lines (82 loc) · 2.67 KB
/
table.go
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/*
* Copyright 2018- The Pixie Authors.
*
* 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.
*
* SPDX-License-Identifier: Apache-2.0
*/
package bq
import (
"context"
"fmt"
"net/http"
"cloud.google.com/go/bigquery"
"google.golang.org/api/googleapi"
)
// Table is a wrapper around bigquery's Table which also stores the bigquery Schema.
// Storing the bigquery.Schema with the bigquery.Table is useful because the Schema is required for some bigquery operations
// (for example, bigquery.StructSaver based puts).
type Table struct {
Schema bigquery.Schema
Table *bigquery.Table
}
// NewTableForStruct returns a new bigquery Table wrapper storing rows of type `s`, creating the bigquery table and dataset if necessary.
func NewTableForStruct(project string, datasetName string, datasetLoc string, tableName string, timePartitioning *bigquery.TimePartitioning, s interface{}) (*Table, error) {
client, err := bigquery.NewClient(context.Background(), project)
if err != nil {
return nil, err
}
defer client.Close()
dataset := client.Dataset(datasetName)
err = dataset.Create(context.Background(), &bigquery.DatasetMetadata{Location: datasetLoc})
if err != nil {
apiError, ok := err.(*googleapi.Error)
if !ok {
return nil, fmt.Errorf("unexpected error creating dataset: %v", err)
}
// StatusConflict indicates that this dataset already exists.
// If so, we can carry along. Else we hit something else unexpected.
if apiError.Code != http.StatusConflict {
return nil, err
}
}
schema, err := bigquery.InferSchema(s)
if err != nil {
return nil, err
}
table := dataset.Table(tableName)
// Check if the table already exists, if so, just return.
_, err = table.Metadata(context.Background())
if err == nil {
return &Table{
Schema: schema,
Table: table,
}, nil
}
// Table needs to be created.
err = table.Create(context.Background(), &bigquery.TableMetadata{
Schema: schema,
TimePartitioning: timePartitioning,
})
if err != nil {
return nil, err
}
return &Table{
Schema: schema,
Table: table,
}, nil
}
// Inserter returns the underlying bigquery.Table's Inserter.
func (t *Table) Inserter() *bigquery.Inserter {
return t.Table.Inserter()
}