15515b2cc1
We had a get_key_from_typed_value() utility function to decode a JSON-encoded value with a known type (the JSON encoding is a map whose key is the type, the value always a string because all possible key types - string, bytes and number, are encoded as strings). However, the function was less useful than it could have been - it was missing one check for a malformed object (a check which only appeared in one of its callers), it unnecessarily received the column's expected type (all the callers passed it the given key column's type). The cleaned up function will be more useful for the following patch to support KeyConditionExpression, which wants to reuse it. While at it, this patch also uses rjson::to_string_view(it->value) instead of the less correct it->value.GetString() (the latter relies on null-termination, which is actually true for JSON strings, but there is no reason to rely on it). Signed-off-by: Nadav Har'El <nyh@scylladb.com> Message-Id: <20200213192509.32685-3-nyh@scylladb.com>
73 lines
2.3 KiB
C++
73 lines
2.3 KiB
C++
/*
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* Copyright 2019 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <string>
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#include <string_view>
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#include "types.hh"
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#include "schema.hh"
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#include "keys.hh"
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#include "rjson.hh"
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#include "utils/big_decimal.hh"
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namespace alternator {
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enum class alternator_type : int8_t {
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S, B, BOOL, N, NOT_SUPPORTED_YET
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};
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struct type_info {
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alternator_type atype;
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data_type dtype;
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};
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struct type_representation {
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std::string ident;
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data_type dtype;
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};
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type_info type_info_from_string(std::string type);
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type_representation represent_type(alternator_type atype);
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bytes serialize_item(const rjson::value& item);
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rjson::value deserialize_item(bytes_view bv);
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std::string type_to_string(data_type type);
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bytes get_key_column_value(const rjson::value& item, const column_definition& column);
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bytes get_key_from_typed_value(const rjson::value& key_typed_value, const column_definition& column);
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rjson::value json_key_column_value(bytes_view cell, const column_definition& column);
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partition_key pk_from_json(const rjson::value& item, schema_ptr schema);
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clustering_key ck_from_json(const rjson::value& item, schema_ptr schema);
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// If v encodes a number (i.e., it is a {"N": [...]}, returns an object representing it. Otherwise,
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// raises ValidationException with diagnostic.
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big_decimal unwrap_number(const rjson::value& v, std::string_view diagnostic);
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// Check if a given JSON object encodes a set (i.e., it is a {"SS": [...]}, or "NS", "BS"
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// and returns set's type and a pointer to that set. If the object does not encode a set,
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// returned value is {"", nullptr}
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const std::pair<std::string, const rjson::value*> unwrap_set(const rjson::value& v);
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}
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