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7e6c5394f3
The list_concatenate() function was only used for UpdateExpression's ADD operation, so we made it a static function in the source file where it was used. In the next patch, we'll want to use it in another place (AttributeUpdates' ADD operation), so let's move it to the same file where similar functions for sets exist. This patch is almost entirely a code move, but also makes one small change: list_concatenate() used to throw an exception if one of the arguments wasn't a list, but the text of this exception was specific to UpdateExpression. So in the new version, we return a null value in this case - and the caller checks for it and throws the right exception. Signed-off-by: Nadav Har'El <nyh@scylladb.com>
96 lines
3.6 KiB
C++
96 lines
3.6 KiB
C++
/*
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* Copyright 2019-present 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_fwd.hh"
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#include "keys.hh"
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#include "utils/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_view 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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// Check if a given JSON object encodes a list (i.e., it is a {"L": [...]}
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// and returns a pointer to that list.
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const rjson::value* unwrap_list(const rjson::value& v);
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// Take two JSON-encoded numeric values ({"N": "thenumber"}) and return the
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// sum, again as a JSON-encoded number.
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rjson::value number_add(const rjson::value& v1, const rjson::value& v2);
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rjson::value number_subtract(const rjson::value& v1, const rjson::value& v2);
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// Take two JSON-encoded set values (e.g. {"SS": [...the actual set]}) and
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// return the sum of both sets, again as a set value.
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rjson::value set_sum(const rjson::value& v1, const rjson::value& v2);
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// Take two JSON-encoded set values (e.g. {"SS": [...the actual list]}) and
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// return the difference of s1 - s2, again as a set value.
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// DynamoDB does not allow empty sets, so if resulting set is empty, return
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// an unset optional instead.
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std::optional<rjson::value> set_diff(const rjson::value& v1, const rjson::value& v2);
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// Take two JSON-encoded list values (remember that a list value is
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// {"L": [...the actual list]}) and return the concatenation, again as
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// a list value.
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// Returns a null value if one of the arguments is not actually a list.
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rjson::value list_concatenate(const rjson::value& v1, const rjson::value& v2);
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}
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