// This file defines the types of predicates that can
// be passed down to the InfluxDB storage gRPC service
//
// Copy/pasted, as closely as verbatim as possible, from
// https://github.com/influxdata/influxdb/blob/master/storage/reads/datatypes/predicate.proto

syntax = "proto3";
package influxdata.platform.storage;


message Node {
    enum Type {
        LOGICAL_EXPRESSION = 0;
        COMPARISON_EXPRESSION = 1;
        PAREN_EXPRESSION = 2;
        TAG_REF = 3;
        LITERAL = 4;
        FIELD_REF = 5;
    }

    enum Comparison {
        EQUAL = 0;
        NOT_EQUAL = 1;
        STARTS_WITH = 2;
        REGEX = 3;
        NOT_REGEX = 4;
        LT = 5;
        LTE = 6;
        GT = 7;
        GTE = 8;
    }

    // Logical operators apply to boolean values and combine to produce a single boolean result.
    enum Logical {
        AND = 0;
        OR = 1;
    }

    repeated Node children = 2;

    oneof value {
        string string_value = 3;
        bool bool_value = 4;
        int64 int_value = 5;
        uint64 uint_value = 6;
        double float_value = 7;
        string regex_value = 8;
        //string tag_ref_value = 9;
        // AAL changed from string --> bytes to handle \xff and \x00 literals
        bytes tag_ref_value = 9;
        string field_ref_value = 10;
        Logical logical = 11;
        Comparison comparison = 12;
    }
}

message Predicate {
    Node root = 1;
}