// Copyright 2025 Google LLC
//
// 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 bigquerycommon
import (
"context"
"fmt"
bigqueryapi "cloud.google.com/go/bigquery"
bigqueryrestapi "google.golang.org/api/bigquery/v2"
)
// DryRunQuery performs a dry run of the SQL query to validate it and get metadata.
func DryRunQuery(ctx context.Context, restService *bigqueryrestapi.Service, projectID string, location string, sql string, params []*bigqueryrestapi.QueryParameter, connProps []*bigqueryapi.ConnectionProperty) (*bigqueryrestapi.Job, error) {
useLegacySql := false
restConnProps := make([]*bigqueryrestapi.ConnectionProperty, len(connProps))
for i, prop := range connProps {
restConnProps[i] = &bigqueryrestapi.ConnectionProperty{Key: prop.Key, Value: prop.Value}
}
jobToInsert := &bigqueryrestapi.Job{
JobReference: &bigqueryrestapi.JobReference{
ProjectId: projectID,
Location: location,
},
Configuration: &bigqueryrestapi.JobConfiguration{
DryRun: true,
Query: &bigqueryrestapi.JobConfigurationQuery{
Query: sql,
UseLegacySql: &useLegacySql,
ConnectionProperties: restConnProps,
QueryParameters: params,
},
},
}
insertResponse, err := restService.Jobs.Insert(projectID, jobToInsert).Context(ctx).Do()
if err != nil {
return nil, fmt.Errorf("failed to insert dry run job: %w", err)
}
return insertResponse, nil
}
