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67 lines
2.5 KiB
67 lines
2.5 KiB
// Copyright 2021 Google LLC |
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// |
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// Licensed under the Apache License, Version 2.0 (the "License"); |
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// you may not use this file except in compliance with the License. |
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// You may obtain a copy of the License at |
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// |
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// http://www.apache.org/licenses/LICENSE-2.0 |
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// |
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// Unless required by applicable law or agreed to in writing, software |
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// distributed under the License is distributed on an "AS IS" BASIS, |
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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// See the License for the specific language governing permissions and |
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// limitations under the License. |
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syntax = "proto3"; |
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package google.cloud.datacatalog.v1; |
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import "google/api/field_behavior.proto"; |
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option cc_enable_arenas = true; |
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option csharp_namespace = "Google.Cloud.DataCatalog.V1"; |
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option go_package = "google.golang.org/genproto/googleapis/cloud/datacatalog/v1;datacatalog"; |
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option java_multiple_files = true; |
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option java_package = "com.google.cloud.datacatalog.v1"; |
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option php_namespace = "Google\\Cloud\\DataCatalog\\V1"; |
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option ruby_package = "Google::Cloud::DataCatalog::V1"; |
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// Represents a schema, for example, a BigQuery, GoogleSQL, or Avro schema. |
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message Schema { |
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// The unified GoogleSQL-like schema of columns. |
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// |
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// The overall maximum number of columns and nested columns is 10,000. |
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// The maximum nested depth is 15 levels. |
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repeated ColumnSchema columns = 2; |
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} |
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// A column within a schema. Columns can be nested inside |
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// other columns. |
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message ColumnSchema { |
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// Required. Name of the column. |
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// |
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// Must be a UTF-8 string without dots (.). |
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// The maximum size is 64 bytes. |
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string column = 6 [(google.api.field_behavior) = REQUIRED]; |
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// Required. Type of the column. |
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// |
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// Must be a UTF-8 string with the maximum size of 128 bytes. |
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string type = 1 [(google.api.field_behavior) = REQUIRED]; |
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// Optional. Description of the column. Default value is an empty string. |
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// |
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// The description must be a UTF-8 string with the maximum size of 2000 |
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// bytes. |
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string description = 2 [(google.api.field_behavior) = OPTIONAL]; |
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// Optional. A column's mode indicates whether values in this column are required, |
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// nullable, or repeated. |
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// |
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// Only `NULLABLE`, `REQUIRED`, and `REPEATED` values are supported. |
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// Default mode is `NULLABLE`. |
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string mode = 3 [(google.api.field_behavior) = OPTIONAL]; |
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// Optional. Schema of sub-columns. A column can have zero or more sub-columns. |
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repeated ColumnSchema subcolumns = 7 [(google.api.field_behavior) = OPTIONAL]; |
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}
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