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Diffstat (limited to 'third_party/googleapis/google/spanner/v1/result_set.proto')
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1 files changed, 186 insertions, 0 deletions
diff --git a/third_party/googleapis/google/spanner/v1/result_set.proto b/third_party/googleapis/google/spanner/v1/result_set.proto new file mode 100644 index 0000000000..6f5e5e9fc6 --- /dev/null +++ b/third_party/googleapis/google/spanner/v1/result_set.proto @@ -0,0 +1,186 @@ +// Copyright 2017 Google Inc. +// +// 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. + +syntax = "proto3"; + +package google.spanner.v1; + +import "google/api/annotations.proto"; +import "google/protobuf/struct.proto"; +import "google/spanner/v1/query_plan.proto"; +import "google/spanner/v1/transaction.proto"; +import "google/spanner/v1/type.proto"; + +option csharp_namespace = "Google.Cloud.Spanner.V1"; +option go_package = "google.golang.org/genproto/googleapis/spanner/v1;spanner"; +option java_multiple_files = true; +option java_outer_classname = "ResultSetProto"; +option java_package = "com.google.spanner.v1"; + + +// Results from [Read][google.spanner.v1.Spanner.Read] or +// [ExecuteSql][google.spanner.v1.Spanner.ExecuteSql]. +message ResultSet { + // Metadata about the result set, such as row type information. + ResultSetMetadata metadata = 1; + + // Each element in `rows` is a row whose format is defined by + // [metadata.row_type][google.spanner.v1.ResultSetMetadata.row_type]. The ith element + // in each row matches the ith field in + // [metadata.row_type][google.spanner.v1.ResultSetMetadata.row_type]. Elements are + // encoded based on type as described + // [here][google.spanner.v1.TypeCode]. + repeated google.protobuf.ListValue rows = 2; + + // Query plan and execution statistics for the query that produced this + // result set. These can be requested by setting + // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode]. + ResultSetStats stats = 3; +} + +// Partial results from a streaming read or SQL query. Streaming reads and +// SQL queries better tolerate large result sets, large rows, and large +// values, but are a little trickier to consume. +message PartialResultSet { + // Metadata about the result set, such as row type information. + // Only present in the first response. + ResultSetMetadata metadata = 1; + + // A streamed result set consists of a stream of values, which might + // be split into many `PartialResultSet` messages to accommodate + // large rows and/or large values. Every N complete values defines a + // row, where N is equal to the number of entries in + // [metadata.row_type.fields][google.spanner.v1.StructType.fields]. + // + // Most values are encoded based on type as described + // [here][google.spanner.v1.TypeCode]. + // + // It is possible that the last value in values is "chunked", + // meaning that the rest of the value is sent in subsequent + // `PartialResultSet`(s). This is denoted by the [chunked_value][google.spanner.v1.PartialResultSet.chunked_value] + // field. Two or more chunked values can be merged to form a + // complete value as follows: + // + // * `bool/number/null`: cannot be chunked + // * `string`: concatenate the strings + // * `list`: concatenate the lists. If the last element in a list is a + // `string`, `list`, or `object`, merge it with the first element in + // the next list by applying these rules recursively. + // * `object`: concatenate the (field name, field value) pairs. If a + // field name is duplicated, then apply these rules recursively + // to merge the field values. + // + // Some examples of merging: + // + // # Strings are concatenated. + // "foo", "bar" => "foobar" + // + // # Lists of non-strings are concatenated. + // [2, 3], [4] => [2, 3, 4] + // + // # Lists are concatenated, but the last and first elements are merged + // # because they are strings. + // ["a", "b"], ["c", "d"] => ["a", "bc", "d"] + // + // # Lists are concatenated, but the last and first elements are merged + // # because they are lists. Recursively, the last and first elements + // # of the inner lists are merged because they are strings. + // ["a", ["b", "c"]], [["d"], "e"] => ["a", ["b", "cd"], "e"] + // + // # Non-overlapping object fields are combined. + // {"a": "1"}, {"b": "2"} => {"a": "1", "b": 2"} + // + // # Overlapping object fields are merged. + // {"a": "1"}, {"a": "2"} => {"a": "12"} + // + // # Examples of merging objects containing lists of strings. + // {"a": ["1"]}, {"a": ["2"]} => {"a": ["12"]} + // + // For a more complete example, suppose a streaming SQL query is + // yielding a result set whose rows contain a single string + // field. The following `PartialResultSet`s might be yielded: + // + // { + // "metadata": { ... } + // "values": ["Hello", "W"] + // "chunked_value": true + // "resume_token": "Af65..." + // } + // { + // "values": ["orl"] + // "chunked_value": true + // "resume_token": "Bqp2..." + // } + // { + // "values": ["d"] + // "resume_token": "Zx1B..." + // } + // + // This sequence of `PartialResultSet`s encodes two rows, one + // containing the field value `"Hello"`, and a second containing the + // field value `"World" = "W" + "orl" + "d"`. + repeated google.protobuf.Value values = 2; + + // If true, then the final value in [values][google.spanner.v1.PartialResultSet.values] is chunked, and must + // be combined with more values from subsequent `PartialResultSet`s + // to obtain a complete field value. + bool chunked_value = 3; + + // Streaming calls might be interrupted for a variety of reasons, such + // as TCP connection loss. If this occurs, the stream of results can + // be resumed by re-sending the original request and including + // `resume_token`. Note that executing any other transaction in the + // same session invalidates the token. + bytes resume_token = 4; + + // Query plan and execution statistics for the query that produced this + // streaming result set. These can be requested by setting + // [ExecuteSqlRequest.query_mode][google.spanner.v1.ExecuteSqlRequest.query_mode] and are sent + // only once with the last response in the stream. + ResultSetStats stats = 5; +} + +// Metadata about a [ResultSet][google.spanner.v1.ResultSet] or [PartialResultSet][google.spanner.v1.PartialResultSet]. +message ResultSetMetadata { + // Indicates the field names and types for the rows in the result + // set. For example, a SQL query like `"SELECT UserId, UserName FROM + // Users"` could return a `row_type` value like: + // + // "fields": [ + // { "name": "UserId", "type": { "code": "INT64" } }, + // { "name": "UserName", "type": { "code": "STRING" } }, + // ] + StructType row_type = 1; + + // If the read or SQL query began a transaction as a side-effect, the + // information about the new transaction is yielded here. + Transaction transaction = 2; +} + +// Additional statistics about a [ResultSet][google.spanner.v1.ResultSet] or [PartialResultSet][google.spanner.v1.PartialResultSet]. +message ResultSetStats { + // [QueryPlan][google.spanner.v1.QueryPlan] for the query associated with this result. + QueryPlan query_plan = 1; + + // Aggregated statistics from the execution of the query. Only present when + // the query is profiled. For example, a query could return the statistics as + // follows: + // + // { + // "rows_returned": "3", + // "elapsed_time": "1.22 secs", + // "cpu_time": "1.19 secs" + // } + google.protobuf.Struct query_stats = 2; +} |