mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-01 03:52:15 +00:00
ed5b521110
* Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2]. * Less dependencies [#CLICKHOUSE-2].
318 lines
15 KiB
C++
318 lines
15 KiB
C++
#pragma once
|
|
|
|
#include <DB/Core/Field.h>
|
|
#include <common/DateLUT.h>
|
|
|
|
|
|
class SipHash;
|
|
|
|
|
|
namespace DB
|
|
{
|
|
|
|
namespace ErrorCodes
|
|
{
|
|
extern const int CANNOT_CONVERT_TYPE;
|
|
}
|
|
|
|
|
|
/** StaticVisitor (and its descendants) - class with overloaded operator() for all types of fields.
|
|
* You could call visitor for field using function 'applyVisitor'.
|
|
* Also "binary visitor" is supported - its operator() takes two arguments.
|
|
*/
|
|
template <typename R = void>
|
|
struct StaticVisitor
|
|
{
|
|
using ResultType = R;
|
|
};
|
|
|
|
|
|
/// F is template parameter, to allow universal reference for field, that is useful for const and non-const values.
|
|
template <typename Visitor, typename F>
|
|
typename std::decay<Visitor>::type::ResultType applyVisitor(Visitor && visitor, F && field)
|
|
{
|
|
switch (field.getType())
|
|
{
|
|
case Field::Types::Null: return visitor(field.template get<Null>());
|
|
case Field::Types::UInt64: return visitor(field.template get<UInt64>());
|
|
case Field::Types::Int64: return visitor(field.template get<Int64>());
|
|
case Field::Types::Float64: return visitor(field.template get<Float64>());
|
|
case Field::Types::String: return visitor(field.template get<String>());
|
|
case Field::Types::Array: return visitor(field.template get<Array>());
|
|
case Field::Types::Tuple: return visitor(field.template get<Tuple>());
|
|
|
|
default:
|
|
throw Exception("Bad type of Field", ErrorCodes::BAD_TYPE_OF_FIELD);
|
|
}
|
|
}
|
|
|
|
|
|
template <typename Visitor, typename F1, typename F2>
|
|
static typename std::decay<Visitor>::type::ResultType applyBinaryVisitorImpl(Visitor && visitor, F1 && field1, F2 && field2)
|
|
{
|
|
switch (field2.getType())
|
|
{
|
|
case Field::Types::Null: return visitor(field1, field2.template get<Null>());
|
|
case Field::Types::UInt64: return visitor(field1, field2.template get<UInt64>());
|
|
case Field::Types::Int64: return visitor(field1, field2.template get<Int64>());
|
|
case Field::Types::Float64: return visitor(field1, field2.template get<Float64>());
|
|
case Field::Types::String: return visitor(field1, field2.template get<String>());
|
|
case Field::Types::Array: return visitor(field1, field2.template get<Array>());
|
|
case Field::Types::Tuple: return visitor(field1, field2.template get<Tuple>());
|
|
|
|
default:
|
|
throw Exception("Bad type of Field", ErrorCodes::BAD_TYPE_OF_FIELD);
|
|
}
|
|
}
|
|
|
|
template <typename Visitor, typename F1, typename F2>
|
|
typename std::decay<Visitor>::type::ResultType applyVisitor(Visitor && visitor, F1 && field1, F2 && field2)
|
|
{
|
|
switch (field1.getType())
|
|
{
|
|
case Field::Types::Null:
|
|
return applyBinaryVisitorImpl(
|
|
std::forward<Visitor>(visitor), field1.template get<Null>(), std::forward<F2>(field2));
|
|
case Field::Types::UInt64:
|
|
return applyBinaryVisitorImpl(
|
|
std::forward<Visitor>(visitor), field1.template get<UInt64>(), std::forward<F2>(field2));
|
|
case Field::Types::Int64:
|
|
return applyBinaryVisitorImpl(
|
|
std::forward<Visitor>(visitor), field1.template get<Int64>(), std::forward<F2>(field2));
|
|
case Field::Types::Float64:
|
|
return applyBinaryVisitorImpl(
|
|
std::forward<Visitor>(visitor), field1.template get<Float64>(), std::forward<F2>(field2));
|
|
case Field::Types::String:
|
|
return applyBinaryVisitorImpl(
|
|
std::forward<Visitor>(visitor), field1.template get<String>(), std::forward<F2>(field2));
|
|
case Field::Types::Array:
|
|
return applyBinaryVisitorImpl(
|
|
std::forward<Visitor>(visitor), field1.template get<Array>(), std::forward<F2>(field2));
|
|
case Field::Types::Tuple:
|
|
return applyBinaryVisitorImpl(
|
|
std::forward<Visitor>(visitor), field1.template get<Tuple>(), std::forward<F2>(field2));
|
|
|
|
default:
|
|
throw Exception("Bad type of Field", ErrorCodes::BAD_TYPE_OF_FIELD);
|
|
}
|
|
}
|
|
|
|
|
|
/** Prints Field as literal in SQL query */
|
|
class FieldVisitorToString : public StaticVisitor<String>
|
|
{
|
|
public:
|
|
String operator() (const Null & x) const;
|
|
String operator() (const UInt64 & x) const;
|
|
String operator() (const Int64 & x) const;
|
|
String operator() (const Float64 & x) const;
|
|
String operator() (const String & x) const;
|
|
String operator() (const Array & x) const;
|
|
String operator() (const Tuple & x) const;
|
|
};
|
|
|
|
|
|
/** Print readable and unique text dump of field type and value. */
|
|
class FieldVisitorDump : public StaticVisitor<String>
|
|
{
|
|
public:
|
|
String operator() (const Null & x) const;
|
|
String operator() (const UInt64 & x) const;
|
|
String operator() (const Int64 & x) const;
|
|
String operator() (const Float64 & x) const;
|
|
String operator() (const String & x) const;
|
|
String operator() (const Array & x) const;
|
|
String operator() (const Tuple & x) const;
|
|
};
|
|
|
|
|
|
/** Converts numberic value of any type to specified type. */
|
|
template <typename T>
|
|
class FieldVisitorConvertToNumber : public StaticVisitor<T>
|
|
{
|
|
public:
|
|
T operator() (const Null & x) const
|
|
{
|
|
throw Exception("Cannot convert NULL to " + TypeName<T>::get(), ErrorCodes::CANNOT_CONVERT_TYPE);
|
|
}
|
|
|
|
T operator() (const String & x) const
|
|
{
|
|
throw Exception("Cannot convert String to " + TypeName<T>::get(), ErrorCodes::CANNOT_CONVERT_TYPE);
|
|
}
|
|
|
|
T operator() (const Array & x) const
|
|
{
|
|
throw Exception("Cannot convert Array to " + TypeName<T>::get(), ErrorCodes::CANNOT_CONVERT_TYPE);
|
|
}
|
|
|
|
T operator() (const Tuple & x) const
|
|
{
|
|
throw Exception("Cannot convert Tuple to " + TypeName<T>::get(), ErrorCodes::CANNOT_CONVERT_TYPE);
|
|
}
|
|
|
|
T operator() (const UInt64 & x) const { return x; }
|
|
T operator() (const Int64 & x) const { return x; }
|
|
T operator() (const Float64 & x) const { return x; }
|
|
};
|
|
|
|
|
|
/** Updates SipHash by type and value of Field */
|
|
class FieldVisitorHash : public StaticVisitor<>
|
|
{
|
|
private:
|
|
SipHash & hash;
|
|
public:
|
|
FieldVisitorHash(SipHash & hash);
|
|
|
|
void operator() (const Null & x) const;
|
|
void operator() (const UInt64 & x) const;
|
|
void operator() (const Int64 & x) const;
|
|
void operator() (const Float64 & x) const;
|
|
void operator() (const String & x) const;
|
|
void operator() (const Array & x) const;
|
|
};
|
|
|
|
|
|
/// Converts string with date or datetime (in format 'YYYY-MM-DD hh:mm:ss') to UInt64 containing numeric value of date (or datetime)
|
|
UInt64 stringToDateOrDateTime(const String & s);
|
|
|
|
/// Converts string with date to UInt16 (which is alias of DayNum_t) containing numeric value of date
|
|
DayNum_t stringToDate(const String & s);
|
|
|
|
/// Converts string with date to UInt64 containing numeric value of datetime
|
|
UInt64 stringToDateTime(const String & s);
|
|
|
|
|
|
/** More precise comparison, used for index.
|
|
* Differs from Field::operator< and Field::operator== in that it also compares values of different types.
|
|
* Comparison rules are same as in FunctionsComparison (to be consistent with expression evaluation in query).
|
|
* Except in cases when comparing signed and unsigned integers, which is unspecified behavior in FunctionsComparison,
|
|
* and when comparing integers and floats. Comparison is accurate here.
|
|
*/
|
|
class FieldVisitorAccurateEquals : public StaticVisitor<bool>
|
|
{
|
|
using Double128 = long double; /// Non portable. Must have 64 bit mantissa to provide accurate comparisons.
|
|
|
|
public:
|
|
bool operator() (const Null & l, const Null & r) const { return true; }
|
|
bool operator() (const Null & l, const UInt64 & r) const { return false; }
|
|
bool operator() (const Null & l, const Int64 & r) const { return false; }
|
|
bool operator() (const Null & l, const Float64 & r) const { return false; }
|
|
bool operator() (const Null & l, const String & r) const { return false; }
|
|
bool operator() (const Null & l, const Array & r) const { return false; }
|
|
bool operator() (const Null & l, const Tuple & r) const { return false; }
|
|
|
|
bool operator() (const UInt64 & l, const Null & r) const { return false; }
|
|
bool operator() (const UInt64 & l, const UInt64 & r) const { return l == r; }
|
|
bool operator() (const UInt64 & l, const Int64 & r) const { return r >= 0 && l == UInt64(r); }
|
|
bool operator() (const UInt64 & l, const Float64 & r) const { return Double128(l) == Double128(r); }
|
|
bool operator() (const UInt64 & l, const String & r) const { return l == stringToDateOrDateTime(r); }
|
|
bool operator() (const UInt64 & l, const Array & r) const { return false; }
|
|
bool operator() (const UInt64 & l, const Tuple & r) const { return false; }
|
|
|
|
bool operator() (const Int64 & l, const Null & r) const { return false; }
|
|
bool operator() (const Int64 & l, const UInt64 & r) const { return l >= 0 && UInt64(l) == r; }
|
|
bool operator() (const Int64 & l, const Int64 & r) const { return l == r; }
|
|
bool operator() (const Int64 & l, const Float64 & r) const { return Double128(l) == Double128(r); }
|
|
bool operator() (const Int64 & l, const String & r) const { return false; }
|
|
bool operator() (const Int64 & l, const Array & r) const { return false; }
|
|
bool operator() (const Int64 & l, const Tuple & r) const { return false; }
|
|
|
|
bool operator() (const Float64 & l, const Null & r) const { return false; }
|
|
bool operator() (const Float64 & l, const UInt64 & r) const { return Double128(l) == Double128(r); }
|
|
bool operator() (const Float64 & l, const Int64 & r) const { return Double128(l) == Double128(r); }
|
|
bool operator() (const Float64 & l, const Float64 & r) const { return l == r; }
|
|
bool operator() (const Float64 & l, const String & r) const { return false; }
|
|
bool operator() (const Float64 & l, const Array & r) const { return false; }
|
|
bool operator() (const Float64 & l, const Tuple & r) const { return false; }
|
|
|
|
bool operator() (const String & l, const Null & r) const { return false; }
|
|
bool operator() (const String & l, const UInt64 & r) const { return stringToDateOrDateTime(l) == r; }
|
|
bool operator() (const String & l, const Int64 & r) const { return false; }
|
|
bool operator() (const String & l, const Float64 & r) const { return false; }
|
|
bool operator() (const String & l, const String & r) const { return l == r; }
|
|
bool operator() (const String & l, const Array & r) const { return false; }
|
|
bool operator() (const String & l, const Tuple & r) const { return false; }
|
|
|
|
bool operator() (const Array & l, const Null & r) const { return false; }
|
|
bool operator() (const Array & l, const UInt64 & r) const { return false; }
|
|
bool operator() (const Array & l, const Int64 & r) const { return false; }
|
|
bool operator() (const Array & l, const Float64 & r) const { return false; }
|
|
bool operator() (const Array & l, const String & r) const { return false; }
|
|
bool operator() (const Array & l, const Array & r) const { return l == r; }
|
|
bool operator() (const Array & l, const Tuple & r) const { return false; }
|
|
|
|
bool operator() (const Tuple & l, const Null & r) const { return false; }
|
|
bool operator() (const Tuple & l, const UInt64 & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Int64 & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Float64 & r) const { return false; }
|
|
bool operator() (const Tuple & l, const String & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Array & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Tuple & r) const { return l == r; }
|
|
};
|
|
|
|
class FieldVisitorAccurateLess : public StaticVisitor<bool>
|
|
{
|
|
using Double128 = long double; /// Non portable. Must have 64 bit mantissa to provide accurate comparisons.
|
|
|
|
public:
|
|
bool operator() (const Null & l, const Null & r) const { return false; }
|
|
bool operator() (const Null & l, const UInt64 & r) const { return true; }
|
|
bool operator() (const Null & l, const Int64 & r) const { return true; }
|
|
bool operator() (const Null & l, const Float64 & r) const { return true; }
|
|
bool operator() (const Null & l, const String & r) const { return true; }
|
|
bool operator() (const Null & l, const Array & r) const { return true; }
|
|
bool operator() (const Null & l, const Tuple & r) const { return true; }
|
|
|
|
bool operator() (const UInt64 & l, const Null & r) const { return false; }
|
|
bool operator() (const UInt64 & l, const UInt64 & r) const { return l < r; }
|
|
bool operator() (const UInt64 & l, const Int64 & r) const { return r >= 0 && l < UInt64(r); }
|
|
bool operator() (const UInt64 & l, const Float64 & r) const { return Double128(l) < Double128(r); }
|
|
bool operator() (const UInt64 & l, const String & r) const { return l < stringToDateOrDateTime(r); }
|
|
bool operator() (const UInt64 & l, const Array & r) const { return true; }
|
|
bool operator() (const UInt64 & l, const Tuple & r) const { return true; }
|
|
|
|
bool operator() (const Int64 & l, const Null & r) const { return false; }
|
|
bool operator() (const Int64 & l, const UInt64 & r) const { return l < 0 || UInt64(l) < r; }
|
|
bool operator() (const Int64 & l, const Int64 & r) const { return l < r; }
|
|
bool operator() (const Int64 & l, const Float64 & r) const { return Double128(l) < Double128(r); }
|
|
bool operator() (const Int64 & l, const String & r) const { return true; }
|
|
bool operator() (const Int64 & l, const Array & r) const { return true; }
|
|
bool operator() (const Int64 & l, const Tuple & r) const { return true; }
|
|
|
|
bool operator() (const Float64 & l, const Null & r) const { return false; }
|
|
bool operator() (const Float64 & l, const UInt64 & r) const { return Double128(l) < Double128(r); }
|
|
bool operator() (const Float64 & l, const Int64 & r) const { return Double128(l) < Double128(r); }
|
|
bool operator() (const Float64 & l, const Float64 & r) const { return l < r; }
|
|
bool operator() (const Float64 & l, const String & r) const { return true; }
|
|
bool operator() (const Float64 & l, const Array & r) const { return true; }
|
|
bool operator() (const Float64 & l, const Tuple & r) const { return true; }
|
|
|
|
bool operator() (const String & l, const Null & r) const { return false; }
|
|
bool operator() (const String & l, const UInt64 & r) const { return stringToDateOrDateTime(l) < r; }
|
|
bool operator() (const String & l, const Int64 & r) const { return false; }
|
|
bool operator() (const String & l, const Float64 & r) const { return false; }
|
|
bool operator() (const String & l, const String & r) const { return l < r; }
|
|
bool operator() (const String & l, const Array & r) const { return true; }
|
|
bool operator() (const String & l, const Tuple & r) const { return true; }
|
|
|
|
bool operator() (const Array & l, const Null & r) const { return false; }
|
|
bool operator() (const Array & l, const UInt64 & r) const { return false; }
|
|
bool operator() (const Array & l, const Int64 & r) const { return false; }
|
|
bool operator() (const Array & l, const Float64 & r) const { return false; }
|
|
bool operator() (const Array & l, const String & r) const { return false; }
|
|
bool operator() (const Array & l, const Array & r) const { return l < r; }
|
|
bool operator() (const Array & l, const Tuple & r) const { return false; }
|
|
|
|
bool operator() (const Tuple & l, const Null & r) const { return false; }
|
|
bool operator() (const Tuple & l, const UInt64 & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Int64 & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Float64 & r) const { return false; }
|
|
bool operator() (const Tuple & l, const String & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Array & r) const { return false; }
|
|
bool operator() (const Tuple & l, const Tuple & r) const { return l < r; }
|
|
};
|
|
|
|
}
|