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#pragma once
#include <Core/Types.h>
namespace DB
{
/// Represents the full name of a row policy, e.g. "myfilter ON mydb.mytable".
struct RowPolicyName
{
static constexpr char ANY_TABLE_MARK[] = "";
String short_name;
String database;
String table_name;
bool empty() const { return short_name.empty(); }
String toString() const;
auto toTuple() const { return std::tie(short_name, database, table_name); }
friend bool operator ==(const RowPolicyName & left, const RowPolicyName & right) { return left.toTuple() == right.toTuple(); }
friend bool operator !=(const RowPolicyName & left, const RowPolicyName & right) { return left.toTuple() != right.toTuple(); }
};
/// Types of the filters of row policies.
/// Currently only RowPolicyFilterType::SELECT is supported.
enum class RowPolicyFilterType
{
/// Filter is a SQL conditional expression used to figure out which rows should be visible
/// for user or available for modification. If the expression returns NULL or false for some rows
/// those rows are silently suppressed.
SELECT_FILTER,
#if 0 /// Row-level security for INSERT, UPDATE, DELETE is not implemented yet.
/// Check is a SQL condition expression used to check whether a row can be written into
/// the table. If the expression returns NULL or false an exception is thrown.
/// If a conditional expression here is empty it means no filtering is applied.
INSERT_CHECK,
UPDATE_FILTER,
UPDATE_CHECK,
DELETE_FILTER,
#endif
MAX
};
String toString(RowPolicyFilterType type);
struct RowPolicyFilterTypeInfo
{
const char * const raw_name;
const String name; /// Lowercased with underscores, e.g. "select_filter".
const String command; /// Uppercased without last word, e.g. "SELECT".
const bool is_check; /// E.g. false for SELECT_FILTER.
static const RowPolicyFilterTypeInfo & get(RowPolicyFilterType type);
};
}
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