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#include <Parsers/Access/ParserShowCreateAccessEntityQuery.h>
#include <Parsers/Access/ASTShowCreateAccessEntityQuery.h>
#include <Parsers/Access/ASTRowPolicyName.h>
#include <Parsers/Access/ParserRowPolicyName.h>
#include <Parsers/Access/parseUserName.h>
#include <Parsers/CommonParsers.h>
#include <Parsers/parseIdentifierOrStringLiteral.h>
#include <Parsers/parseDatabaseAndTableName.h>
#include <base/range.h>
#include <cassert>
namespace DB
{
namespace ErrorCodes
{
extern const int NOT_IMPLEMENTED;
}
namespace
{
bool parseEntityType(IParserBase::Pos & pos, Expected & expected, AccessEntityType & type, bool & plural)
{
for (auto i : collections::range(AccessEntityType::MAX))
{
const auto & type_info = AccessEntityTypeInfo::get(i);
if (ParserKeyword{type_info.name}.ignore(pos, expected)
|| (!type_info.alias.empty() && ParserKeyword{type_info.alias}.ignore(pos, expected)))
{
type = i;
plural = false;
return true;
}
}
for (auto i : collections::range(AccessEntityType::MAX))
{
const auto & type_info = AccessEntityTypeInfo::get(i);
if (ParserKeyword{type_info.plural_name}.ignore(pos, expected)
|| (!type_info.plural_alias.empty() && ParserKeyword{type_info.plural_alias}.ignore(pos, expected)))
{
type = i;
plural = true;
return true;
}
}
return false;
}
bool parseOnDBAndTableName(IParserBase::Pos & pos, Expected & expected, String & database, bool & any_database, String & table, bool & any_table)
{
return IParserBase::wrapParseImpl(pos, [&]
{
return ParserKeyword{"ON"}.ignore(pos, expected)
&& parseDatabaseAndTableNameOrAsterisks(pos, expected, database, any_database, table, any_table);
});
}
}
bool ParserShowCreateAccessEntityQuery::parseImpl(Pos & pos, ASTPtr & node, Expected & expected)
{
if (!ParserKeyword{"SHOW CREATE"}.ignore(pos, expected))
return false;
AccessEntityType type;
bool plural;
if (!parseEntityType(pos, expected, type, plural))
return false;
Strings names;
std::shared_ptr<ASTRowPolicyNames> row_policy_names;
bool all = false;
bool current_quota = false;
bool current_user = false;
String short_name;
std::optional<std::pair<String, String>> database_and_table_name;
switch (type)
{
case AccessEntityType::USER:
{
if (parseCurrentUserTag(pos, expected))
current_user = true;
else if (parseUserNames(pos, expected, names))
{
}
else if (plural)
all = true;
else
current_user = true;
break;
}
case AccessEntityType::ROLE:
{
if (parseRoleNames(pos, expected, names))
{
}
else if (plural)
all = true;
else
return false;
break;
}
case AccessEntityType::ROW_POLICY:
{
ASTPtr ast;
String database, table_name;
bool any_database, any_table;
if (ParserRowPolicyNames{}.parse(pos, ast, expected))
row_policy_names = typeid_cast<std::shared_ptr<ASTRowPolicyNames>>(ast);
else if (parseOnDBAndTableName(pos, expected, database, any_database, table_name, any_table))
{
if (any_database)
all = true;
else
database_and_table_name.emplace(database, table_name);
}
else if (parseIdentifierOrStringLiteral(pos, expected, short_name))
{
}
else if (plural)
all = true;
else
return false;
break;
}
case AccessEntityType::SETTINGS_PROFILE:
{
if (parseIdentifiersOrStringLiterals(pos, expected, names))
{
}
else if (plural)
all = true;
else
return false;
break;
}
case AccessEntityType::QUOTA:
{
if (parseIdentifiersOrStringLiterals(pos, expected, names))
{
}
else if (plural)
all = true;
else
current_quota = true;
break;
}
case AccessEntityType::MAX:
throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Type {} is not implemented in SHOW CREATE query", toString(type));
}
auto query = std::make_shared<ASTShowCreateAccessEntityQuery>();
node = query;
query->type = type;
query->names = std::move(names);
query->current_quota = current_quota;
query->current_user = current_user;
query->row_policy_names = std::move(row_policy_names);
query->all = all;
query->short_name = std::move(short_name);
query->database_and_table_name = std::move(database_and_table_name);
return true;
}
}
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