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#pragma once
#include <Core/Types.h>
namespace DB
{
/// We use UInt64 to count used resources.
using QuotaValue = UInt64;
/// Kinds of resource what we wish to quota.
enum class QuotaType
{
QUERIES, /// Number of queries.
QUERY_SELECTS, /// Number of select queries.
QUERY_INSERTS, /// Number of insert queries.
ERRORS, /// Number of queries with exceptions.
RESULT_ROWS, /// Number of rows returned as result.
RESULT_BYTES, /// Number of bytes returned as result.
READ_ROWS, /// Number of rows read from tables.
READ_BYTES, /// Number of bytes read from tables.
EXECUTION_TIME, /// Total amount of query execution time in nanoseconds.
WRITTEN_BYTES, /// Number of bytes written to tables.
MAX
};
String toString(QuotaType type);
struct QuotaTypeInfo
{
const char * const raw_name = "";
const String name; /// Lowercased with underscores, e.g. "result_rows".
const String keyword; /// Uppercased with spaces, e.g. "RESULT ROWS".
const bool output_as_float = false;
const UInt64 output_denominator = 1;
String valueToString(QuotaValue value) const;
QuotaValue stringToValue(const String & str) const;
String valueToStringWithName(QuotaValue value) const;
static const QuotaTypeInfo & get(QuotaType type);
};
/// Key to share quota consumption.
/// Users with the same key share the same amount of resource.
enum class QuotaKeyType
{
NONE, /// All users share the same quota.
USER_NAME, /// Connections with the same user name share the same quota.
IP_ADDRESS, /// Connections from the same IP share the same quota.
FORWARDED_IP_ADDRESS, /// Use X-Forwarded-For HTTP header instead of IP address.
CLIENT_KEY, /// Client should explicitly supply a key to use.
CLIENT_KEY_OR_USER_NAME, /// Same as CLIENT_KEY, but use USER_NAME if the client doesn't supply a key.
CLIENT_KEY_OR_IP_ADDRESS, /// Same as CLIENT_KEY, but use IP_ADDRESS if the client doesn't supply a key.
MAX
};
String toString(QuotaKeyType type);
struct QuotaKeyTypeInfo
{
const char * const raw_name;
const String name; /// Lowercased with underscores, e.g. "client_key".
const std::vector<QuotaKeyType> base_types; /// For combined types keeps base types, e.g. for CLIENT_KEY_OR_USER_NAME it keeps [KeyType::CLIENT_KEY, KeyAccessEntityType::USER_NAME].
static const QuotaKeyTypeInfo & get(QuotaKeyType type);
};
}
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