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#include <Parsers/ASTBackupQuery.h>
#include <Parsers/ASTFunction.h>
#include <Parsers/ASTSetQuery.h>
#include <IO/Operators.h>
#include <Common/assert_cast.h>
#include <Common/quoteString.h>
#include <boost/range/algorithm_ext/erase.hpp>
namespace DB
{
namespace
{
using Kind = ASTBackupQuery::Kind;
using Element = ASTBackupQuery::Element;
using ElementType = ASTBackupQuery::ElementType;
void formatPartitions(const ASTs & partitions, const IAST::FormatSettings & format)
{
format.ostr << " " << (format.hilite ? IAST::hilite_keyword : "") << ((partitions.size() == 1) ? "PARTITION" : "PARTITIONS") << " "
<< (format.hilite ? IAST::hilite_none : "");
bool need_comma = false;
for (const auto & partition : partitions)
{
if (std::exchange(need_comma, true))
format.ostr << ",";
format.ostr << " ";
partition->format(format);
}
}
void formatExceptDatabases(const std::set<String> & except_databases, const IAST::FormatSettings & format)
{
if (except_databases.empty())
return;
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << " EXCEPT "
<< (except_databases.size() == 1 ? "DATABASE" : "DATABASES") << " " << (format.hilite ? IAST::hilite_none : "");
bool need_comma = false;
for (const auto & database_name : except_databases)
{
if (std::exchange(need_comma, true))
format.ostr << ",";
format.ostr << backQuoteIfNeed(database_name);
}
}
void formatExceptTables(const std::set<DatabaseAndTableName> & except_tables, const IAST::FormatSettings & format)
{
if (except_tables.empty())
return;
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << " EXCEPT " << (except_tables.size() == 1 ? "TABLE" : "TABLES") << " "
<< (format.hilite ? IAST::hilite_none : "");
bool need_comma = false;
for (const auto & table_name : except_tables)
{
if (std::exchange(need_comma, true))
format.ostr << ", ";
if (!table_name.first.empty())
format.ostr << backQuoteIfNeed(table_name.first) << ".";
format.ostr << backQuoteIfNeed(table_name.second);
}
}
void formatElement(const Element & element, const IAST::FormatSettings & format)
{
switch (element.type)
{
case ElementType::TABLE:
{
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << "TABLE " << (format.hilite ? IAST::hilite_none : "");
if (!element.database_name.empty())
format.ostr << backQuoteIfNeed(element.database_name) << ".";
format.ostr << backQuoteIfNeed(element.table_name);
if ((element.new_table_name != element.table_name) || (element.new_database_name != element.database_name))
{
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << " AS " << (format.hilite ? IAST::hilite_none : "");
if (!element.new_database_name.empty())
format.ostr << backQuoteIfNeed(element.new_database_name) << ".";
format.ostr << backQuoteIfNeed(element.new_table_name);
}
if (element.partitions)
formatPartitions(*element.partitions, format);
break;
}
case ElementType::TEMPORARY_TABLE:
{
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << "TEMPORARY TABLE " << (format.hilite ? IAST::hilite_none : "");
format.ostr << backQuoteIfNeed(element.table_name);
if (element.new_table_name != element.table_name)
{
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << " AS " << (format.hilite ? IAST::hilite_none : "");
format.ostr << backQuoteIfNeed(element.new_table_name);
}
break;
}
case ElementType::DATABASE:
{
format.ostr << (format.hilite ? IAST::hilite_keyword : "");
format.ostr << "DATABASE ";
format.ostr << (format.hilite ? IAST::hilite_none : "");
format.ostr << backQuoteIfNeed(element.database_name);
if (element.new_database_name != element.database_name)
{
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << " AS " << (format.hilite ? IAST::hilite_none : "");
format.ostr << backQuoteIfNeed(element.new_database_name);
}
formatExceptTables(element.except_tables, format);
break;
}
case ElementType::ALL:
{
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << "ALL" << (format.hilite ? IAST::hilite_none : "");
formatExceptDatabases(element.except_databases, format);
formatExceptTables(element.except_tables, format);
break;
}
}
}
void formatElements(const std::vector<Element> & elements, const IAST::FormatSettings & format)
{
bool need_comma = false;
for (const auto & element : elements)
{
if (std::exchange(need_comma, true))
format.ostr << ", ";
formatElement(element, format);
}
}
void formatSettings(const ASTPtr & settings, const ASTFunction * base_backup_name, const ASTPtr & cluster_host_ids, const IAST::FormatSettings & format)
{
if (!settings && !base_backup_name && !cluster_host_ids)
return;
format.ostr << (format.hilite ? IAST::hilite_keyword : "") << " SETTINGS " << (format.hilite ? IAST::hilite_none : "");
bool empty = true;
if (base_backup_name)
{
format.ostr << "base_backup = ";
base_backup_name->format(format);
empty = false;
}
if (settings)
{
if (!empty)
format.ostr << ", ";
settings->format(format);
empty = false;
}
if (cluster_host_ids)
{
if (!empty)
format.ostr << ", ";
format.ostr << "cluster_host_ids = ";
cluster_host_ids->format(format);
}
}
ASTPtr rewriteSettingsWithoutOnCluster(ASTPtr settings, const WithoutOnClusterASTRewriteParams & params)
{
SettingsChanges changes;
if (settings)
changes = assert_cast<ASTSetQuery *>(settings.get())->changes;
boost::remove_erase_if(
changes,
[](const SettingChange & change)
{
const String & name = change.name;
return (name == "internal") || (name == "async") || (name == "host_id");
});
changes.emplace_back("internal", true);
changes.emplace_back("async", true);
changes.emplace_back("host_id", params.host_id);
auto out_settings = std::make_shared<ASTSetQuery>();
out_settings->changes = std::move(changes);
out_settings->is_standalone = false;
return out_settings;
}
}
void ASTBackupQuery::Element::setCurrentDatabase(const String & current_database)
{
if (current_database.empty())
return;
if (type == ASTBackupQuery::TABLE)
{
if (database_name.empty())
database_name = current_database;
if (new_database_name.empty())
new_database_name = current_database;
}
else if (type == ASTBackupQuery::ALL)
{
for (auto it = except_tables.begin(); it != except_tables.end();)
{
const auto & except_table = *it;
if (except_table.first.empty())
{
except_tables.emplace(DatabaseAndTableName{current_database, except_table.second});
it = except_tables.erase(it);
}
else
{
++it;
}
}
}
}
void ASTBackupQuery::setCurrentDatabase(ASTBackupQuery::Elements & elements, const String & current_database)
{
for (auto & element : elements)
element.setCurrentDatabase(current_database);
}
String ASTBackupQuery::getID(char) const
{
return (kind == Kind::BACKUP) ? "BackupQuery" : "RestoreQuery";
}
ASTPtr ASTBackupQuery::clone() const
{
auto res = std::make_shared<ASTBackupQuery>(*this);
res->children.clear();
if (backup_name)
res->set(res->backup_name, backup_name->clone());
if (base_backup_name)
res->set(res->base_backup_name, base_backup_name->clone());
if (cluster_host_ids)
res->cluster_host_ids = cluster_host_ids->clone();
if (settings)
res->settings = settings->clone();
return res;
}
void ASTBackupQuery::formatImpl(const FormatSettings & format, FormatState &, FormatStateStacked) const
{
format.ostr << (format.hilite ? hilite_keyword : "") << ((kind == Kind::BACKUP) ? "BACKUP " : "RESTORE ")
<< (format.hilite ? hilite_none : "");
formatElements(elements, format);
formatOnCluster(format);
format.ostr << (format.hilite ? hilite_keyword : "") << ((kind == Kind::BACKUP) ? " TO " : " FROM ") << (format.hilite ? hilite_none : "");
backup_name->format(format);
if (settings || base_backup_name)
formatSettings(settings, base_backup_name, cluster_host_ids, format);
}
ASTPtr ASTBackupQuery::getRewrittenASTWithoutOnCluster(const WithoutOnClusterASTRewriteParams & params) const
{
auto new_query = std::static_pointer_cast<ASTBackupQuery>(clone());
new_query->cluster.clear();
new_query->settings = rewriteSettingsWithoutOnCluster(new_query->settings, params);
new_query->setCurrentDatabase(new_query->elements, params.default_database);
return new_query;
}
IAST::QueryKind ASTBackupQuery::getQueryKind() const
{
return kind == Kind::BACKUP ? QueryKind::Backup : QueryKind::Restore;
}
}
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