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#pragma once
#include <Core/Types.h>
#include <Parsers/IParser.h>
#include <Parsers/parseIdentifierOrStringLiteral.h>
namespace DB
{
/// Parses a user name. It can be a simple string or identifier or something like `name@host`.
/// In the last case `host` specifies the hosts user is allowed to connect from.
/// The `host` can be an ip address, ip subnet, or a host name.
/// The % and _ wildcard characters are permitted in `host`.
/// These have the same meaning as for pattern-matching operations performed with the LIKE operator.
bool parseUserName(IParser::Pos & pos, Expected & expected, String & user_name);
/// Parses a comma-separated list of user names.
bool parseUserNames(IParser::Pos & pos, Expected & expected, Strings & user_names);
/// Parses either the 'CURRENT_USER' keyword (or some of its aliases).
bool parseCurrentUserTag(IParser::Pos & pos, Expected & expected);
/// Parses a role name. It follows the same rules as a user name, but allowed hosts are never checked
/// (because roles are not used to connect to server).
inline bool parseRoleName(IParser::Pos & pos, Expected & expected, String & role_name)
{
return parseUserName(pos, expected, role_name);
}
/// Parses a comma-separated list of role names.
inline bool parseRoleNames(IParser::Pos & pos, Expected & expected, Strings & role_names)
{
return parseUserNames(pos, expected, role_names);
}
}
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