| // Copyright 2011-2015 Quickstep Technologies LLC. |
| // Copyright 2015 Pivotal Software, 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 = "proto2"; |
| |
| package quickstep.serialization; |
| |
| import "expressions/Expressions.proto"; |
| import "expressions/aggregation/AggregateFunction.proto"; |
| import "storage/HashTable.proto"; |
| |
| message Aggregate { |
| required AggregateFunction function = 1; |
| repeated Scalar argument = 2; |
| } |
| |
| message AggregationOperationState { |
| required int32 relation_id = 1; |
| repeated Aggregate aggregates = 2; |
| repeated Scalar group_by_expressions = 3; |
| optional Predicate predicate = 4; |
| required uint64 estimated_num_entries = 5; |
| |
| // NOTE(chasseur): 'hash_table_impl_type' is marked optional, but it is |
| // needed if 'group_by_expressions' is non-empty, and ignored otherwise. |
| optional HashTableImplType hash_table_impl_type = 6; |
| } |