mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-03 04:52:10 +00:00
120 lines
3.6 KiB
C++
120 lines
3.6 KiB
C++
#include <Parsers/ASTIdentifier_fwd.h>
|
|
#include <Parsers/ASTRenameQuery.h>
|
|
|
|
#include <Parsers/CommonParsers.h>
|
|
#include <Parsers/ParserRenameQuery.h>
|
|
#include <Parsers/parseDatabaseAndTableName.h>
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
bool ParserRenameQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
|
|
{
|
|
ParserKeyword s_rename_table("RENAME TABLE");
|
|
ParserKeyword s_exchange_tables("EXCHANGE TABLES");
|
|
ParserKeyword s_rename_dictionary("RENAME DICTIONARY");
|
|
ParserKeyword s_exchange_dictionaries("EXCHANGE DICTIONARIES");
|
|
ParserKeyword s_rename_database("RENAME DATABASE");
|
|
ParserKeyword s_if_exists("IF EXISTS");
|
|
ParserKeyword s_to("TO");
|
|
ParserKeyword s_and("AND");
|
|
ParserToken s_comma(TokenType::Comma);
|
|
|
|
bool exchange = false;
|
|
bool dictionary = false;
|
|
|
|
if (s_rename_table.ignore(pos, expected))
|
|
;
|
|
else if (s_exchange_tables.ignore(pos, expected))
|
|
exchange = true;
|
|
else if (s_rename_dictionary.ignore(pos, expected))
|
|
dictionary = true;
|
|
else if (s_exchange_dictionaries.ignore(pos, expected))
|
|
{
|
|
exchange = true;
|
|
dictionary = true;
|
|
}
|
|
else if (s_rename_database.ignore(pos, expected))
|
|
{
|
|
ASTPtr from_db;
|
|
ASTPtr to_db;
|
|
ParserIdentifier db_name_p(true);
|
|
bool if_exists = s_if_exists.ignore(pos, expected);
|
|
if (!db_name_p.parse(pos, from_db, expected))
|
|
return false;
|
|
if (!s_to.ignore(pos, expected))
|
|
return false;
|
|
if (!db_name_p.parse(pos, to_db, expected))
|
|
return false;
|
|
|
|
String cluster_str;
|
|
if (ParserKeyword{"ON"}.ignore(pos, expected))
|
|
{
|
|
if (!ASTQueryWithOnCluster::parse(pos, cluster_str, expected))
|
|
return false;
|
|
}
|
|
|
|
auto query = std::make_shared<ASTRenameQuery>();
|
|
query->database = true;
|
|
query->elements.emplace({});
|
|
query->elements.front().if_exists = if_exists;
|
|
query->elements.front().from.database = from_db;
|
|
query->elements.front().to.database = to_db;
|
|
query->children.push_back(std::move(from_db));
|
|
query->children.push_back(std::move(to_db));
|
|
query->cluster = cluster_str;
|
|
node = query;
|
|
return true;
|
|
}
|
|
else
|
|
return false;
|
|
|
|
const auto ignore_delim = [&] { return exchange ? s_and.ignore(pos) : s_to.ignore(pos); };
|
|
|
|
auto query = std::make_shared<ASTRenameQuery>();
|
|
|
|
ASTRenameQuery::Elements & elements = query->elements;
|
|
|
|
while (true)
|
|
{
|
|
if (!elements.empty() && !s_comma.ignore(pos))
|
|
break;
|
|
|
|
ASTRenameQuery::Element & ref = elements.emplace_back();
|
|
|
|
if (!exchange)
|
|
ref.if_exists = s_if_exists.ignore(pos, expected);
|
|
|
|
if (!parseDatabaseAndTableAsAST(pos, expected, ref.from.database, ref.from.table)
|
|
|| !ignore_delim()
|
|
|| !parseDatabaseAndTableAsAST(pos, expected, ref.to.database, ref.to.table))
|
|
return false;
|
|
|
|
if (ref.from.database)
|
|
query->children.push_back(ref.from.database);
|
|
if (ref.from.table)
|
|
query->children.push_back(ref.from.table);
|
|
if (ref.to.database)
|
|
query->children.push_back(ref.to.database);
|
|
if (ref.to.table)
|
|
query->children.push_back(ref.to.table);
|
|
}
|
|
|
|
String cluster_str;
|
|
if (ParserKeyword{"ON"}.ignore(pos, expected))
|
|
{
|
|
if (!ASTQueryWithOnCluster::parse(pos, cluster_str, expected))
|
|
return false;
|
|
}
|
|
|
|
query->cluster = cluster_str;
|
|
query->exchange = exchange;
|
|
query->dictionary = dictionary;
|
|
node = query;
|
|
return true;
|
|
}
|
|
|
|
|
|
}
|