| // Copyright 2018 The LUCI 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. |
| |
| // Command bqschemaupdater accepts location and schema of a BigQuery table and |
| // creates or updates the table. |
| // |
| // When converting a proto message to BigQuery schema, in the order of |
| // precedence: |
| // |
| // - one message field becomes at most one BigQuery field |
| // - if a field has leading comments, common indentation is trimmed |
| // and the result becomes the BigQuery field description |
| // - if a field is of enum type, the BigQuery type is string |
| // and valid values are appended to the BigQuery field description |
| // - if a field is google.protobuf.Duration, the BigQuery type is FLOAT64 |
| // - if a field is google.protobuf.Timestamp, the BigQuery type is TIMESTAMP |
| // - if a field is google.protobuf.Struct, is is persisted as a JSONPB string. |
| // - if a field is of message type, the BigQuery type is RECORD |
| // with schema corresponding to the proto field type, recursively. |
| // However, if the resulting RECORD schema is empty, the field is omitted. |
| package main |
