// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements.  See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership.  The ASF licenses this file
// to you 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 "types/Type.proto";

message Comparison {
  enum ComparisonID {
    EQUAL = 0;
    NOT_EQUAL = 1;
    LESS = 2;
    LESS_OR_EQUAL = 3;
    GREATER = 4;
    GREATER_OR_EQUAL = 5;
    LIKE = 6;
    NOT_LIKE = 7;
    REGEX_MATCH = 8;
    NOT_REGEX_MATCH = 9;
  }

  required ComparisonID comparison_id = 1;
}

message UnaryOperation {
  enum UnaryOperationID {
    NEGATE = 0;
    CAST = 1;
    DATE_EXTRACT = 2;
    SUBSTRING = 3;
  }

  required UnaryOperationID operation_id = 1;

  extensions 32 to max;
}

message CastOperation {
  extend UnaryOperation {
    // Required when operation_id = CAST.
    optional Type target_type = 64;
  }
}

message DateExtractOperation {
  enum Unit {
    YEAR = 0;
    MONTH = 1;
    DAY = 2;
    HOUR = 3;
    MINUTE = 4;
    SECOND = 5;
  }

  extend UnaryOperation {
    // Required when operation_id = DATE_EXTRACT.
    optional Unit unit = 96;
  }
}

message SubstringOperation {
  extend UnaryOperation {
    // Required when operation_id = SUBSTRING.
    optional int64 start_position = 100;
    optional int64 substring_length = 101;
  }
}

message BinaryOperation {
  enum BinaryOperationID {
    ADD = 0;
    SUBTRACT = 1;
    MULTIPLY = 2;
    DIVIDE = 3;
    MODULO = 4;
  }

  required BinaryOperationID operation_id = 1;
}