mirror of
https://github.com/ClickHouse/ClickHouse.git
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Miscellaneous [#METR-2944].
This commit is contained in:
Alexey Milovidov
parent
2f7ff07e1f
commit
ae7e7e90eb
@ -2,12 +2,8 @@
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#include <DB/Core/Field.h>
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#include <DB/IO/ReadBuffer.h>
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#include <DB/IO/WriteBuffer.h>
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#include <DB/IO/ReadHelpers.h>
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#include <DB/IO/WriteHelpers.h>
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#include <DB/IO/ReadBufferFromString.h>
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#include <DB/IO/WriteBufferFromString.h>
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class SipHash;
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namespace DB
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@ -19,9 +15,9 @@ namespace ErrorCodes
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}
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/** StaticVisitor (его наследники) - класс с перегруженными для разных типов операторами ().
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* Вызвать visitor для field можно с помощью функции apply_visitor.
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* Также поддерживается visitor, в котором оператор () принимает два аргумента.
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/** StaticVisitor (and its descendants) - class with overloaded operator() for all types of fields.
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* You could call visitor for field using function 'apply_visitor'.
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* Also "binary visitor" is supported - its operator() takes two arguments.
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*/
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template <typename R = void>
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struct StaticVisitor
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@ -30,65 +26,38 @@ struct StaticVisitor
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};
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/// F is template parameter, to allow universal reference for field, that is useful for const and non-const values.
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template <typename Visitor, typename F>
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typename Visitor::ResultType apply_visitor_impl(Visitor & visitor, F & field)
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typename Visitor::ResultType apply_visitor(Visitor && visitor, F && field)
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{
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switch (field.getType())
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{
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case Field::Types::Null: return visitor(field.template get<Null>());
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case Field::Types::UInt64: return visitor(field.template get<UInt64>());
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case Field::Types::Int64: return visitor(field.template get<Int64>());
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case Field::Types::Float64: return visitor(field.template get<Float64>());
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case Field::Types::String: return visitor(field.template get<String>());
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case Field::Types::Array: return visitor(field.template get<Array>());
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case Field::Types::Tuple: return visitor(field.template get<Tuple>());
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case Field::Types::Null: return visitor(field.template get<Null>());
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case Field::Types::UInt64: return visitor(field.template get<UInt64>());
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case Field::Types::Int64: return visitor(field.template get<Int64>());
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case Field::Types::Float64: return visitor(field.template get<Float64>());
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case Field::Types::String: return visitor(field.template get<String>());
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case Field::Types::Array: return visitor(field.template get<Array>());
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case Field::Types::Tuple: return visitor(field.template get<Tuple>());
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default:
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throw Exception("Bad type of Field", ErrorCodes::BAD_TYPE_OF_FIELD);
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}
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}
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/** Эти штуки нужны, чтобы принимать временный объект по константной ссылке.
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* В шаблон выше, типы форвардятся уже с const-ом.
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*/
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(const Visitor & visitor, Field & field)
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{
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return apply_visitor_impl(visitor, field);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(const Visitor & visitor, const Field & field)
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{
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return apply_visitor_impl(visitor, field);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(Visitor & visitor, Field & field)
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{
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return apply_visitor_impl(visitor, field);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(Visitor & visitor, const Field & field)
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{
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return apply_visitor_impl(visitor, field);
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}
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template <typename Visitor, typename F1, typename F2>
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typename Visitor::ResultType apply_binary_visitor_impl2(Visitor & visitor, F1 & field1, F2 & field2)
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static typename Visitor::ResultType apply_binary_visitor_impl(Visitor && visitor, F1 && field1, F2 && field2)
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{
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switch (field2.getType())
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{
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case Field::Types::Null: return visitor(field1, field2.template get<Null>());
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case Field::Types::UInt64: return visitor(field1, field2.template get<UInt64>());
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case Field::Types::Int64: return visitor(field1, field2.template get<Int64>());
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case Field::Types::Float64: return visitor(field1, field2.template get<Float64>());
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case Field::Types::String: return visitor(field1, field2.template get<String>());
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case Field::Types::Array: return visitor(field1, field2.template get<Array>());
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case Field::Types::Tuple: return visitor(field1, field2.template get<Tuple>());
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case Field::Types::Null: return visitor(field1, field2.template get<Null>());
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case Field::Types::UInt64: return visitor(field1, field2.template get<UInt64>());
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case Field::Types::Int64: return visitor(field1, field2.template get<Int64>());
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case Field::Types::Float64: return visitor(field1, field2.template get<Float64>());
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case Field::Types::String: return visitor(field1, field2.template get<String>());
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case Field::Types::Array: return visitor(field1, field2.template get<Array>());
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case Field::Types::Tuple: return visitor(field1, field2.template get<Tuple>());
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default:
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throw Exception("Bad type of Field", ErrorCodes::BAD_TYPE_OF_FIELD);
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@ -96,130 +65,67 @@ typename Visitor::ResultType apply_binary_visitor_impl2(Visitor & visitor, F1 &
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}
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template <typename Visitor, typename F1, typename F2>
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typename Visitor::ResultType apply_binary_visitor_impl1(Visitor & visitor, F1 & field1, F2 & field2)
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typename Visitor::ResultType apply_visitor(Visitor && visitor, F1 && field1, F2 && field2)
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{
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switch (field1.getType())
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{
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case Field::Types::Null: return apply_binary_visitor_impl2(visitor, field1.template get<Null>(), field2);
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case Field::Types::UInt64: return apply_binary_visitor_impl2(visitor, field1.template get<UInt64>(), field2);
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case Field::Types::Int64: return apply_binary_visitor_impl2(visitor, field1.template get<Int64>(), field2);
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case Field::Types::Float64: return apply_binary_visitor_impl2(visitor, field1.template get<Float64>(), field2);
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case Field::Types::String: return apply_binary_visitor_impl2(visitor, field1.template get<String>(), field2);
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case Field::Types::Array: return apply_binary_visitor_impl2(visitor, field1.template get<Array>(), field2);
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case Field::Types::Tuple: return apply_binary_visitor_impl2(visitor, field1.template get<Tuple>(), field2);
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case Field::Types::Null:
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return apply_binary_visitor_impl(
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std::forward<Visitor>(visitor), field1.template get<Null>(), std::forward<Field>(field2));
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case Field::Types::UInt64:
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return apply_binary_visitor_impl(
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std::forward<Visitor>(visitor), field1.template get<UInt64>(), std::forward<Field>(field2));
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case Field::Types::Int64:
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return apply_binary_visitor_impl(
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std::forward<Visitor>(visitor), field1.template get<Int64>(), std::forward<Field>(field2));
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case Field::Types::Float64:
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return apply_binary_visitor_impl(
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std::forward<Visitor>(visitor), field1.template get<Float64>(), std::forward<Field>(field2));
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case Field::Types::String:
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return apply_binary_visitor_impl(
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std::forward<Visitor>(visitor), field1.template get<String>(), std::forward<Field>(field2));
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case Field::Types::Array:
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return apply_binary_visitor_impl(
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std::forward<Visitor>(visitor), field1.template get<Array>(), std::forward<Field>(field2));
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case Field::Types::Tuple:
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return apply_binary_visitor_impl(
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std::forward<Visitor>(visitor), field1.template get<Tuple>(), std::forward<Field>(field2));
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default:
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throw Exception("Bad type of Field", ErrorCodes::BAD_TYPE_OF_FIELD);
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}
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(Visitor & visitor, Field & field1, Field & field2)
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(Visitor & visitor, Field & field1, const Field & field2)
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/** Prints Field as literal in SQL query */
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class FieldVisitorToString : public StaticVisitor<String>
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(Visitor & visitor, const Field & field1, Field & field2)
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(Visitor & visitor, const Field & field1, const Field & field2)
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(const Visitor & visitor, Field & field1, Field & field2)
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(const Visitor & visitor, Field & field1, const Field & field2)
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(const Visitor & visitor, const Field & field1, Field & field2)
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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template <typename Visitor>
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typename Visitor::ResultType apply_visitor(const Visitor & visitor, const Field & field1, const Field & field2)
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{
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return apply_binary_visitor_impl1(visitor, field1, field2);
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}
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/** Возвращает строковый дамп типа */
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class FieldVisitorDump : public StaticVisitor<String>
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{
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private:
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template <typename T>
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static inline String formatQuotedWithPrefix(T x, const char * prefix)
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{
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String res;
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WriteBufferFromString wb(res);
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wb.write(prefix, strlen(prefix));
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writeQuoted(x, wb);
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return res;
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}
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public:
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String operator() (const Null & x) const { return "NULL"; }
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String operator() (const UInt64 & x) const { return formatQuotedWithPrefix(x, "UInt64_"); }
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String operator() (const Int64 & x) const { return formatQuotedWithPrefix(x, "Int64_"); }
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String operator() (const Float64 & x) const { return formatQuotedWithPrefix(x, "Float64_"); }
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String operator() (const Null & x) const;
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String operator() (const UInt64 & x) const;
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String operator() (const Int64 & x) const;
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String operator() (const Float64 & x) const;
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String operator() (const String & x) const;
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String operator() (const Array & x) const;
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String operator() (const Tuple & x) const;
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};
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/** Выводит текстовое представление типа, как литерала в SQL запросе */
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class FieldVisitorToString : public StaticVisitor<String>
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/** Print readable and unique text dump of field type and value. */
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class FieldVisitorDump : public StaticVisitor<String>
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{
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private:
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template <typename T>
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static inline String formatQuoted(T x)
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{
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String res;
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WriteBufferFromString wb(res);
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writeQuoted(x, wb);
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return res;
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}
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/** В отличие от writeFloatText (и writeQuoted), если число после форматирования выглядит целым, всё равно добавляет десятичную точку.
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* - для того, чтобы это число могло обратно распарситься как Float64 парсером запроса (иначе распарсится как целое).
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*
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* При этом, не оставляет завершающие нули справа.
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*
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* NOTE: При таком roundtrip-е, точность может теряться.
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*/
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static String formatFloat(const Float64 x);
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public:
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String operator() (const Null & x) const { return "NULL"; }
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String operator() (const UInt64 & x) const { return formatQuoted(x); }
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String operator() (const Int64 & x) const { return formatQuoted(x); }
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String operator() (const Float64 & x) const { return formatFloat(x); }
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String operator() (const String & x) const { return formatQuoted(x); }
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String operator() (const Null & x) const;
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String operator() (const UInt64 & x) const;
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String operator() (const Int64 & x) const;
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String operator() (const Float64 & x) const;
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String operator() (const String & x) const;
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String operator() (const Array & x) const;
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String operator() (const Tuple & x) const;
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};
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/** Числовой тип преобразует в указанный. */
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/** Converts numberic value of any type to specified type. */
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template <typename T>
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class FieldVisitorConvertToNumber : public StaticVisitor<T>
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{
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@ -250,6 +156,23 @@ public:
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};
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/** Updates SipHash by type and value of Field */
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class FieldVisitorHash : public StaticVisitor<>
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{
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private:
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SipHash & hash;
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public:
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FieldVisitorHash(SipHash & hash);
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void operator() (const Null & x) const;
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void operator() (const UInt64 & x) const;
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void operator() (const Int64 & x) const;
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void operator() (const Float64 & x) const;
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void operator() (const String & x) const;
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void operator() (const Array & x) const;
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};
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/// Converts string with date or datetime (in format 'YYYY-MM-DD hh:mm:ss') to UInt64 containing numeric value of date (or datetime)
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UInt64 stringToDateOrDateTime(const String & s);
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@ -12,10 +12,13 @@
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#include <DB/DataTypes/DataTypeString.h>
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#include <DB/DataTypes/DataTypeFixedString.h>
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#include <DB/DataTypes/DataTypeTuple.h>
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#include <DB/DataTypes/DataTypeEnum.h>
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#include <DB/Functions/FunctionsLogical.h>
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#include <DB/Functions/IFunction.h>
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#include <DB/DataTypes/DataTypeEnum.h>
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#include <DB/IO/ReadBufferFromString.h>
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#include <DB/IO/ReadHelpers.h>
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namespace DB
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@ -1,3 +1,9 @@
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#include <DB/IO/ReadBuffer.h>
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#include <DB/IO/WriteBuffer.h>
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#include <DB/IO/ReadHelpers.h>
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#include <DB/IO/WriteHelpers.h>
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#include <DB/IO/ReadBufferFromString.h>
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#include <DB/IO/WriteBufferFromString.h>
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#include <DB/Core/FieldVisitors.h>
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@ -5,7 +11,8 @@ namespace DB
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{
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String FieldVisitorDump::operator() (const String & x) const
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template <typename T>
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static inline String formatQuoted(T x)
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{
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String res;
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WriteBufferFromString wb(res);
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@ -13,7 +20,32 @@ String FieldVisitorDump::operator() (const String & x) const
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return res;
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}
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String FieldVisitorDump::operator() (const Array & x) const
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template <typename T>
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static inline String formatQuotedWithPrefix(T x, const char * prefix)
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{
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String res;
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WriteBufferFromString wb(res);
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wb.write(prefix, strlen(prefix));
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writeQuoted(x, wb);
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return res;
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}
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String FieldVisitorDump::operator() (const Null & x) const { return "NULL"; }
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String FieldVisitorDump::operator() (const UInt64 & x) const { return formatQuotedWithPrefix(x, "UInt64_"); }
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String FieldVisitorDump::operator() (const Int64 & x) const { return formatQuotedWithPrefix(x, "Int64_"); }
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String FieldVisitorDump::operator() (const Float64 & x) const { return formatQuotedWithPrefix(x, "Float64_"); }
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String FieldVisitorDump::operator() (const String & x) const
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{
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String res;
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WriteBufferFromString wb(res);
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writeQuoted(x, wb);
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return res;
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}
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String FieldVisitorDump::operator() (const Array & x) const
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{
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String res;
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WriteBufferFromString wb(res);
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@ -31,7 +63,7 @@ String FieldVisitorDump::operator() (const Array & x) const
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return res;
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}
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String FieldVisitorDump::operator() (const Tuple & x_def) const
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String FieldVisitorDump::operator() (const Tuple & x_def) const
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{
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auto & x = x_def.t;
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String res;
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@ -51,7 +83,15 @@ String FieldVisitorDump::operator() (const Tuple & x_def) const
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}
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String FieldVisitorToString::formatFloat(const Float64 x)
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/** In contrast to writeFloatText (and writeQuoted),
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* even if number looks like integer after formatting, prints decimal point nevertheless (for example, Float64(1) is printed as 1.).
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* - because resulting text must be able to be parsed back as Float64 by query parser (otherwise it will be parsed as integer).
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*
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* Trailing zeros after decimal point are omitted.
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*
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* NOTE: Roundtrip may lead to loss of precision.
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*/
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static String formatFloat(const Float64 x)
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{
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DoubleConverter<true>::BufferType buffer;
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double_conversion::StringBuilder builder{buffer, sizeof(buffer)};
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@ -64,7 +104,15 @@ String FieldVisitorToString::formatFloat(const Float64 x)
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return { buffer, buffer + builder.position() };
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}
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String FieldVisitorToString::operator() (const Array & x) const
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String FieldVisitorToString::operator() (const Null & x) const { return "NULL"; }
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String FieldVisitorToString::operator() (const UInt64 & x) const { return formatQuoted(x); }
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String FieldVisitorToString::operator() (const Int64 & x) const { return formatQuoted(x); }
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String FieldVisitorToString::operator() (const Float64 & x) const { return formatFloat(x); }
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String FieldVisitorToString::operator() (const String & x) const { return formatQuoted(x); }
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String FieldVisitorToString::operator() (const Array & x) const
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{
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String res;
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WriteBufferFromString wb(res);
|
||||
@ -82,7 +130,7 @@ String FieldVisitorToString::operator() (const Array & x) const
|
||||
return res;
|
||||
}
|
||||
|
||||
String FieldVisitorToString::operator() (const Tuple & x_def) const
|
||||
String FieldVisitorToString::operator() (const Tuple & x_def) const
|
||||
{
|
||||
auto & x = x_def.t;
|
||||
String res;
|
||||
@ -102,6 +150,56 @@ String FieldVisitorToString::operator() (const Tuple & x_def) const
|
||||
}
|
||||
|
||||
|
||||
FieldVisitorHash::FieldVisitorHash(SipHash & hash) : hash(hash) {}
|
||||
|
||||
void FieldVisitorHash::operator() (const Null & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Null;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
}
|
||||
|
||||
void FieldVisitorHash::operator() (const UInt64 & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::UInt64;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
hash.update(reinterpret_cast<const char *>(&x), sizeof(x));
|
||||
}
|
||||
|
||||
void FieldVisitorHash::operator() (const Int64 & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Int64;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
hash.update(reinterpret_cast<const char *>(&x), sizeof(x));
|
||||
}
|
||||
|
||||
void FieldVisitorHash::operator() (const Float64 & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Float64;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
hash.update(reinterpret_cast<const char *>(&x), sizeof(x));
|
||||
}
|
||||
|
||||
void FieldVisitorHash::operator() (const String & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::String;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
size_t size = x.size();
|
||||
hash.update(reinterpret_cast<const char *>(&size), sizeof(size));
|
||||
hash.update(x.data(), x.size());
|
||||
}
|
||||
|
||||
void FieldVisitorHash::operator() (const Array & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Array;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
size_t size = x.size();
|
||||
hash.update(reinterpret_cast<const char *>(&size), sizeof(size));
|
||||
|
||||
for (const auto & elem : x)
|
||||
apply_visitor(*this, elem);
|
||||
}
|
||||
|
||||
|
||||
UInt64 stringToDateOrDateTime(const String & s)
|
||||
{
|
||||
if (s.size() == strlen("YYYY-MM-DD"))
|
||||
|
||||
@ -7,63 +7,6 @@ namespace DB
|
||||
{
|
||||
|
||||
|
||||
/** Обновляет SipHash по данным Field */
|
||||
class FieldVisitorHash : public StaticVisitor<>
|
||||
{
|
||||
private:
|
||||
SipHash & hash;
|
||||
public:
|
||||
FieldVisitorHash(SipHash & hash) : hash(hash) {}
|
||||
|
||||
void operator() (const Null & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Null;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
}
|
||||
|
||||
void operator() (const UInt64 & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::UInt64;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
hash.update(reinterpret_cast<const char *>(&x), sizeof(x));
|
||||
}
|
||||
|
||||
void operator() (const Int64 & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Int64;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
hash.update(reinterpret_cast<const char *>(&x), sizeof(x));
|
||||
}
|
||||
|
||||
void operator() (const Float64 & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Float64;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
hash.update(reinterpret_cast<const char *>(&x), sizeof(x));
|
||||
}
|
||||
|
||||
void operator() (const String & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::String;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
size_t size = x.size();
|
||||
hash.update(reinterpret_cast<const char *>(&size), sizeof(size));
|
||||
hash.update(x.data(), x.size());
|
||||
}
|
||||
|
||||
void operator() (const Array & x) const
|
||||
{
|
||||
UInt8 type = Field::Types::Array;
|
||||
hash.update(reinterpret_cast<const char *>(&type), sizeof(type));
|
||||
size_t size = x.size();
|
||||
hash.update(reinterpret_cast<const char *>(&size), sizeof(size));
|
||||
|
||||
for (const auto & elem : x)
|
||||
apply_visitor(*this, elem);
|
||||
}
|
||||
};
|
||||
|
||||
|
||||
String ASTLiteral::getColumnName() const
|
||||
{
|
||||
/// Отдельный случай для очень больших массивов. Вместо указания всех элементов, будем использовать хэш от содержимого.
|
||||
|
||||
Loading…
Reference in New Issue
Block a user