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#include <Databases/MySQL/tryParseTableIDFromDDL.h>
#include <Parsers/ASTIdentifier.h>
#include <Parsers/CommonParsers.h>
#include <Parsers/ExpressionElementParsers.h>
namespace DB
{
StorageID tryParseTableIDFromDDL(const String & query, const String & default_database_name)
{
bool is_ddl = false;
Tokens tokens(query.data(), query.data() + query.size());
IParser::Pos pos(tokens, 0);
Expected expected;
if (ParserKeyword("CREATE TEMPORARY TABLE").ignore(pos, expected) || ParserKeyword("CREATE TABLE").ignore(pos, expected))
{
ParserKeyword("IF NOT EXISTS").ignore(pos, expected);
is_ddl = true;
}
else if (ParserKeyword("ALTER TABLE").ignore(pos, expected) || ParserKeyword("RENAME TABLE").ignore(pos, expected))
{
is_ddl = true;
}
else if (ParserKeyword("DROP TABLE").ignore(pos, expected) || ParserKeyword("DROP TEMPORARY TABLE").ignore(pos, expected))
{
ParserKeyword("IF EXISTS").ignore(pos, expected);
is_ddl = true;
}
else if (ParserKeyword("TRUNCATE").ignore(pos, expected))
{
ParserKeyword("TABLE").ignore(pos, expected);
is_ddl = true;
}
ASTPtr table;
if (!is_ddl || !ParserCompoundIdentifier(true).parse(pos, table, expected))
return StorageID::createEmpty();
auto table_id = table->as<ASTTableIdentifier>()->getTableId();
if (table_id.database_name.empty())
table_id.database_name = default_database_name;
return table_id;
}
}
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