YugabyteDB (2.13.0.0-b42, bfc6a6643e7399ac8a0e81d06a3ee6d6571b33ab)

// Copyright (c) YugaByte, Inc.

//

// Licensed 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.

//

#include "yb/common/ql_name.h"

#include <boost/algorithm/string/replace.hpp>

using std::string;

namespace yb {

// Prefix for various kinds of identifiers.

// Currently we only care about table::columns and jsonb::attributes.

static const char* kYcqlColumnPrefix = "C$_";                                           // columns.

static const char* kYcqlJattrPrefix = "J$_";                                    // JSONB attribute.

static const char* kYcqlEscape = "$$";                                         // Escape character.

static const char* kYcqlUnescape = "$";                                        // Escape character.

string YcqlName::MangleColumnName(const string& col_name) {

  // Add prefix for column and escaping by replacing all appearances of '$' with '$$'.

  return kYcqlColumnPrefix + ReplacePattern(col_name, kYcqlUnescape, kYcqlEscape);

}

string YcqlName::MangleJsonAttrName(const string& attr_name) {

  // Add prefix for JSONB attribute and escaping by replacing all appearances of '$' with '$$'.

  return kYcqlJattrPrefix + ReplacePattern(attr_name, kYcqlUnescape, kYcqlEscape);

}

string YcqlName::DemangleName(const string& col_name) {

  // Removing all prefixes and un-escaping by replacing all appearances of '$$' with '$'.

  string name;

  name = ReplacePattern(col_name, kYcqlColumnPrefix, "");

  name = ReplacePattern(name, kYcqlJattrPrefix, "");

  name = ReplacePattern(name, kYcqlEscape, kYcqlUnescape);

  return name;

}

string YcqlName::ReplacePattern(const string& ql_name, const string& pattern, const string& str) {

  string name = ql_name;

  boost::replace_all(name, pattern, str);

  return name;

}

}  // namespace yb