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https://github.com/scylladb/scylladb.git
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86c09046fd
Change function argument types and return values to bytes_opt. Note: a comment in the code says that NULL arguments are not supported, but it seems prudent to prepare for the day they will be.
92 lines
2.9 KiB
C++
92 lines
2.9 KiB
C++
/*
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* Licensed to the Apache Software Foundation (ASF) under one
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* or more contributor license agreements. See the NOTICE file
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* distributed with this work for additional information
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* regarding copyright ownership. The ASF licenses this file
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* to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance
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* with the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/*
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* Modified by Cloudius Systems
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*
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* Copyright 2015 Cloudius Systems
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*/
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#pragma once
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#include "native_scalar_function.hh"
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#include "exceptions/exceptions.hh"
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#include "core/print.hh"
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namespace cql3 {
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namespace functions {
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// Most of the XAsBlob and blobAsX functions are basically no-op since everything is
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// bytes internally. They only "trick" the type system.
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inline
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shared_ptr<function>
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make_to_blob_function(data_type from_type) {
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// FIXME: use cql3 type name
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auto name = from_type->name() + "asblob";
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return make_native_scalar_function<true>(name, bytes_type, { from_type },
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[] (serialization_format sf, const std::vector<bytes_opt>& parameters) {
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return parameters[0];
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});
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}
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inline
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shared_ptr<function>
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make_from_blob_function(data_type to_type) {
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// FIXME: use cql3 type name
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sstring name = sstring("blobas") + to_type->name();
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return make_native_scalar_function<true>(name, to_type, { bytes_type },
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[name, to_type] (serialization_format sf, const std::vector<bytes_opt>& parameters) -> bytes_opt {
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auto&& val = parameters[0];
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if (!val) {
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return val;
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}
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try {
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to_type->validate(*val);
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return val;
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} catch (marshal_exception& e) {
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using namespace exceptions;
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throw invalid_request_exception(sprint(
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"In call to function %s, value 0x%s is not a valid binary representation for type %s",
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name, to_hex(val), /* FIXME: toType.asCQL3Type()*/ to_type->name()));
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}
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});
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}
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inline
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shared_ptr<function>
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make_varchar_as_blob_fct() {
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return make_native_scalar_function<true>("varcharasblob", bytes_type, { utf8_type },
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[] (serialization_format sf, const std::vector<bytes_opt>& parameters) -> bytes_opt {
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return parameters[0];
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});
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}
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inline
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shared_ptr<function>
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make_blob_as_varchar_fct() {
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return make_native_scalar_function<true>("blobasvarchar", utf8_type, { bytes_type },
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[] (serialization_format sf, const std::vector<bytes_opt>& parameters) -> bytes_opt {
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return parameters[0];
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});
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}
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}
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}
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