mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-23 16:12:01 +00:00
289 lines
7.7 KiB
C++
289 lines
7.7 KiB
C++
#include <Parsers/ASTIdentifier.h>
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#include <IO/WriteHelpers.h>
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#include <Interpreters/IdentifierSemantic.h>
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#include <Interpreters/StorageID.h>
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#include <Parsers/queryToString.h>
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#include <IO/Operators.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int UNEXPECTED_AST_STRUCTURE;
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}
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ASTIdentifier::ASTIdentifier(const String & short_name, ASTPtr && name_param)
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: full_name(short_name), name_parts{short_name}, semantic(std::make_shared<IdentifierSemanticImpl>())
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{
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if (!name_param)
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assert(!full_name.empty());
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else
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children.push_back(std::move(name_param));
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}
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ASTIdentifier::ASTIdentifier(std::vector<String> && name_parts_, bool special, std::vector<ASTPtr> && name_params)
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: name_parts(name_parts_), semantic(std::make_shared<IdentifierSemanticImpl>())
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{
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assert(!name_parts.empty());
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semantic->special = special;
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semantic->legacy_compound = true;
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if (!name_params.empty())
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{
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size_t params = 0;
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for (const auto & part [[maybe_unused]] : name_parts)
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{
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if (part.empty())
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++params;
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}
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assert(params == name_params.size());
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children = std::move(name_params);
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}
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else
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{
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for (const auto & part [[maybe_unused]] : name_parts)
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assert(!part.empty());
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if (!special && name_parts.size() >= 2)
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semantic->table = name_parts.end()[-2];
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resetFullName();
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}
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}
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ASTPtr ASTIdentifier::getParam() const
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{
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assert(full_name.empty() && children.size() == 1);
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return children.front()->clone();
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}
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ASTPtr ASTIdentifier::clone() const
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{
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auto ret = std::make_shared<ASTIdentifier>(*this);
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ret->semantic = std::make_shared<IdentifierSemanticImpl>(*ret->semantic);
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return ret;
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}
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bool ASTIdentifier::supposedToBeCompound() const
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{
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return semantic->legacy_compound;
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}
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void ASTIdentifier::setShortName(const String & new_name)
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{
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assert(!new_name.empty());
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full_name = new_name;
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name_parts = {new_name};
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bool special = semantic->special;
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auto table = semantic->table;
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*semantic = IdentifierSemanticImpl();
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semantic->special = special;
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semantic->table = table;
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}
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const String & ASTIdentifier::name() const
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{
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if (children.empty())
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{
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assert(!name_parts.empty());
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assert(!full_name.empty());
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}
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return full_name;
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}
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void ASTIdentifier::formatImplWithoutAlias(const FormatSettings & settings, FormatState & state, FormatStateStacked frame) const
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{
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auto format_element = [&](const String & elem_name)
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{
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settings.ostr << (settings.hilite ? hilite_identifier : "");
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settings.writeIdentifier(elem_name);
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settings.ostr << (settings.hilite ? hilite_none : "");
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};
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if (compound())
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{
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for (size_t i = 0, j = 0, size = name_parts.size(); i < size; ++i)
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{
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if (i != 0)
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settings.ostr << '.';
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/// Some AST rewriting code, like IdentifierSemantic::setColumnLongName,
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/// does not respect children of identifier.
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/// Here we also ignore children if they are empty.
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if (name_parts[i].empty() && j < children.size())
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{
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children[j]->formatImpl(settings, state, frame);
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++j;
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}
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else
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format_element(name_parts[i]);
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}
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}
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else
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{
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const auto & name = shortName();
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if (name.empty() && !children.empty())
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children.front()->formatImpl(settings, state, frame);
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else
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format_element(name);
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}
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}
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void ASTIdentifier::appendColumnNameImpl(WriteBuffer & ostr) const
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{
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writeString(name(), ostr);
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}
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void ASTIdentifier::restoreTable()
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{
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if (!compound())
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{
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name_parts.insert(name_parts.begin(), semantic->table);
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resetFullName();
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}
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}
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std::shared_ptr<ASTTableIdentifier> ASTIdentifier::createTable() const
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{
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if (name_parts.size() == 1) return std::make_shared<ASTTableIdentifier>(name_parts[0]);
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if (name_parts.size() == 2) return std::make_shared<ASTTableIdentifier>(name_parts[0], name_parts[1]);
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return nullptr;
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}
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void ASTIdentifier::resetFullName()
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{
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full_name = name_parts[0];
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for (size_t i = 1; i < name_parts.size(); ++i)
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full_name += '.' + name_parts[i];
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}
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ASTTableIdentifier::ASTTableIdentifier(const String & table_name, std::vector<ASTPtr> && name_params)
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: ASTIdentifier({table_name}, true, std::move(name_params))
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{
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}
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ASTTableIdentifier::ASTTableIdentifier(const StorageID & table_id, std::vector<ASTPtr> && name_params)
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: ASTIdentifier(
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table_id.database_name.empty() ? std::vector<String>{table_id.table_name}
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: std::vector<String>{table_id.database_name, table_id.table_name},
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true, std::move(name_params))
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{
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uuid = table_id.uuid;
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}
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ASTTableIdentifier::ASTTableIdentifier(const String & database_name, const String & table_name, std::vector<ASTPtr> && name_params)
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: ASTIdentifier({database_name, table_name}, true, std::move(name_params))
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{
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}
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ASTPtr ASTTableIdentifier::clone() const
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{
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auto ret = std::make_shared<ASTTableIdentifier>(*this);
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ret->semantic = std::make_shared<IdentifierSemanticImpl>(*ret->semantic);
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return ret;
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}
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StorageID ASTTableIdentifier::getTableId() const
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{
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if (name_parts.size() == 2) return {name_parts[0], name_parts[1], uuid};
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else return {{}, name_parts[0], uuid};
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}
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String ASTTableIdentifier::getDatabaseName() const
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{
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if (name_parts.size() == 2) return name_parts[0];
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else return {};
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}
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ASTPtr ASTTableIdentifier::getTable() const
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{
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if (name_parts.size() == 2)
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{
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if (!name_parts[1].empty())
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return std::make_shared<ASTIdentifier>(name_parts[1]);
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if (name_parts[0].empty())
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return std::make_shared<ASTIdentifier>("", children[1]->clone());
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else
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return std::make_shared<ASTIdentifier>("", children[0]->clone());
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}
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else if (name_parts.size() == 1)
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{
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if (name_parts[0].empty())
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return std::make_shared<ASTIdentifier>("", children[0]->clone());
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else
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return std::make_shared<ASTIdentifier>(name_parts[0]);
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}
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else return {};
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}
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ASTPtr ASTTableIdentifier::getDatabase() const
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{
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if (name_parts.size() == 2)
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{
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if (name_parts[0].empty())
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return std::make_shared<ASTIdentifier>("", children[0]->clone());
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else
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return std::make_shared<ASTIdentifier>(name_parts[0]);
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}
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else return {};
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}
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void ASTTableIdentifier::resetTable(const String & database_name, const String & table_name)
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{
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auto identifier = std::make_shared<ASTTableIdentifier>(database_name, table_name);
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full_name.swap(identifier->full_name);
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name_parts.swap(identifier->name_parts);
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uuid = identifier->uuid;
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}
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void ASTTableIdentifier::updateTreeHashImpl(SipHash & hash_state) const
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{
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hash_state.update(uuid);
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IAST::updateTreeHashImpl(hash_state);
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}
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String getIdentifierName(const IAST * ast)
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{
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String res;
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if (tryGetIdentifierNameInto(ast, res))
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return res;
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throw Exception(ast ? queryToString(*ast) + " is not an identifier" : "AST node is nullptr", ErrorCodes::UNEXPECTED_AST_STRUCTURE);
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}
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std::optional<String> tryGetIdentifierName(const IAST * ast)
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{
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String res;
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if (tryGetIdentifierNameInto(ast, res))
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return res;
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return {};
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}
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bool tryGetIdentifierNameInto(const IAST * ast, String & name)
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{
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if (ast)
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{
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if (const auto * node = dynamic_cast<const ASTIdentifier *>(ast))
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{
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name = node->name();
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return true;
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}
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}
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return false;
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}
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void setIdentifierSpecial(ASTPtr & ast)
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{
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if (ast)
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if (auto * id = ast->as<ASTIdentifier>())
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id->semantic->special = true;
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}
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}
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