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# include <DB/Core/Field.h>
# include <DB/Columns/ColumnString.h>
# include <DB/Columns/ColumnFixedString.h>
# include <DB/Columns/ColumnsNumber.h>
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# include <DB/DataStreams/IProfilingBlockInputStream.h>
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# include <DB/DataStreams/OneBlockInputStream.h>
# include <DB/Parsers/ASTExpressionList.h>
# include <DB/Parsers/ASTFunction.h>
# include <DB/Parsers/ASTLiteral.h>
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# include <DB/Interpreters/Set.h>
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# include <DB/DataTypes/DataTypeArray.h>
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# include <DB/DataTypes/DataTypesNumberFixed.h>
# include <DB/DataTypes/DataTypeString.h>
# include <DB/DataTypes/DataTypeFixedString.h>
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namespace DB
{
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void SetVariants : : init ( Type type_ )
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{
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type = type_ ;
switch ( type )
{
case Type : : EMPTY : break ;
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# define M(NAME) \
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case Type : : NAME : NAME . reset ( new decltype ( NAME ) : : element_type ) ; break ;
APPLY_FOR_SET_VARIANTS ( M )
# undef M
default :
throw Exception ( " Unknown Set variant. " , ErrorCodes : : UNKNOWN_AGGREGATED_DATA_VARIANT ) ;
}
}
size_t SetVariants : : getTotalRowCount ( ) const
{
switch ( type )
{
case Type : : EMPTY : return 0 ;
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# define M(NAME) \
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case Type : : NAME : return NAME - > data . size ( ) ;
APPLY_FOR_SET_VARIANTS ( M )
# undef M
default :
throw Exception ( " Unknown Set variant. " , ErrorCodes : : UNKNOWN_AGGREGATED_DATA_VARIANT ) ;
}
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}
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size_t SetVariants : : getTotalByteCount ( ) const
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{
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switch ( type )
{
case Type : : EMPTY : return 0 ;
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# define M(NAME) \
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case Type : : NAME : return NAME - > data . getBufferSizeInBytes ( ) ;
APPLY_FOR_SET_VARIANTS ( M )
# undef M
default :
throw Exception ( " Unknown Set variant. " , ErrorCodes : : UNKNOWN_AGGREGATED_DATA_VARIANT ) ;
}
}
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bool Set : : checkSetSizeLimits ( ) const
{
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if ( max_rows & & data . getTotalRowCount ( ) > max_rows )
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return false ;
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if ( max_bytes & & data . getTotalByteCount ( ) > max_bytes )
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return false ;
return true ;
}
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SetVariants : : Type SetVariants : : chooseMethod ( const ConstColumnPlainPtrs & key_columns , Sizes & key_sizes )
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{
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size_t keys_size = key_columns . size ( ) ;
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bool all_fixed = true ;
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size_t keys_bytes = 0 ;
key_sizes . resize ( keys_size ) ;
for ( size_t j = 0 ; j < keys_size ; + + j )
{
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if ( ! key_columns [ j ] - > isFixed ( ) )
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{
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all_fixed = false ;
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break ;
}
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key_sizes [ j ] = key_columns [ j ] - > sizeOfField ( ) ;
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keys_bytes + = key_sizes [ j ] ;
}
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/// Если есть один числовой ключ, который помещается в 64 бита
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if ( keys_size = = 1 & & key_columns [ 0 ] - > isNumeric ( ) )
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{
size_t size_of_field = key_columns [ 0 ] - > sizeOfField ( ) ;
if ( size_of_field = = 1 )
return SetVariants : : Type : : key8 ;
if ( size_of_field = = 2 )
return SetVariants : : Type : : key16 ;
if ( size_of_field = = 4 )
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return SetVariants : : Type : : key32 ;
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if ( size_of_field = = 8 )
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return SetVariants : : Type : : key64 ;
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throw Exception ( " Logical error: numeric column has sizeOfField not in 1, 2, 4, 8. " , ErrorCodes : : LOGICAL_ERROR ) ;
}
/// Если ключи помещаются в N бит, будем использовать хэш-таблицу по упакованным в N-бит ключам
if ( all_fixed & & keys_bytes < = 16 )
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return SetVariants : : Type : : keys128 ;
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if ( all_fixed & & keys_bytes < = 32 )
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return SetVariants : : Type : : keys256 ;
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/// Если есть один строковый ключ, то используем хэш-таблицу с ним
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if ( keys_size = = 1 & & ( typeid_cast < const ColumnString * > ( key_columns [ 0 ] ) | | typeid_cast < const ColumnConstString * > ( key_columns [ 0 ] ) ) )
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return SetVariants : : Type : : key_string ;
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if ( keys_size = = 1 & & typeid_cast < const ColumnFixedString * > ( key_columns [ 0 ] ) )
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return SetVariants : : Type : : key_fixed_string ;
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/// Иначе будем агрегировать по конкатенации ключей.
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return SetVariants : : Type : : hashed ;
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}
template < typename Method >
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void NO_INLINE Set : : insertFromBlockImpl (
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Method & method ,
const ConstColumnPlainPtrs & key_columns ,
size_t rows ,
SetVariants & variants )
{
typename Method : : State state ;
state . init ( key_columns ) ;
size_t keys_size = key_columns . size ( ) ;
/// Для всех строчек
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for ( size_t i = 0 ; i < rows ; + + i )
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{
/// Строим ключ
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typename Method : : Key key = state . getKey ( key_columns , keys_size , i , key_sizes ) ;
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typename Method : : Data : : iterator it = method . data . find ( key ) ;
bool inserted ;
method . data . emplace ( key , it , inserted ) ;
if ( inserted )
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method . onNewKey ( * it , keys_size , i , variants . string_pool ) ;
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}
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}
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bool Set : : insertFromBlock ( const Block & block , bool create_ordered_set )
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{
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Poco : : ScopedWriteRWLock lock ( rwlock ) ;
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size_t keys_size = block . columns ( ) ;
ConstColumnPlainPtrs key_columns ( keys_size ) ;
data_types . resize ( keys_size ) ;
/// Запоминаем столбцы, с которыми будем работать
for ( size_t i = 0 ; i < keys_size ; + + i )
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{
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key_columns [ i ] = block . getByPosition ( i ) . column ;
data_types [ i ] = block . getByPosition ( i ) . type ;
}
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size_t rows = block . rows ( ) ;
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/// Какую структуру данных для множества использовать?
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if ( empty ( ) )
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data . init ( data . chooseMethod ( key_columns , key_sizes ) ) ;
if ( false ) { }
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# define M(NAME) \
else if ( data . type = = SetVariants : : Type : : NAME ) \
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insertFromBlockImpl ( * data . NAME , key_columns , rows , data ) ;
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APPLY_FOR_SET_VARIANTS ( M )
# undef M
else
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throw Exception ( " Unknown set variant. " , ErrorCodes : : UNKNOWN_SET_DATA_VARIANT ) ;
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if ( create_ordered_set )
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for ( size_t i = 0 ; i < rows ; + + i )
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ordered_set_elements - > push_back ( ( * key_columns [ 0 ] ) [ i ] ) ; /// ordered_set для индекса работает только если IN одному ключу.
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if ( ! checkSetSizeLimits ( ) )
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{
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if ( overflow_mode = = OverflowMode : : THROW )
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throw Exception ( " IN-set size exceeded. "
" Rows: " + toString ( data . getTotalRowCount ( ) ) +
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" , limit: " + toString ( max_rows ) +
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" . Bytes: " + toString ( data . getTotalByteCount ( ) ) +
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" , limit: " + toString ( max_bytes ) + " . " ,
ErrorCodes : : SET_SIZE_LIMIT_EXCEEDED ) ;
if ( overflow_mode = = OverflowMode : : BREAK )
return false ;
throw Exception ( " Logical error: unknown overflow mode " , ErrorCodes : : LOGICAL_ERROR ) ;
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}
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return true ;
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}
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/** Чтобы корректно работали выражения вида 1.0 IN (1).
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* П р о в е р я е т с о в м е с т и м о с т ь т и п о в , п р о в е р я е т п о п а д а н и е з н а ч е н и й в д и а п а з о н д о п у с т и м ы х з н а ч е н и й т и п а , д е л а е т п р е о б р а з о в а н и е т и п а .
* К о д с л е г к а д у р а ц к и й .
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*/
static Field convertToType ( const Field & src , const IDataType & type )
{
if ( type . behavesAsNumber ( ) )
{
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bool is_uint8 = false ;
bool is_uint16 = false ;
bool is_uint32 = false ;
bool is_uint64 = false ;
bool is_int8 = false ;
bool is_int16 = false ;
bool is_int32 = false ;
bool is_int64 = false ;
bool is_float32 = false ;
bool is_float64 = false ;
false
| | ( is_uint8 = typeid_cast < const DataTypeUInt8 * > ( & type ) )
| | ( is_uint16 = typeid_cast < const DataTypeUInt16 * > ( & type ) )
| | ( is_uint32 = typeid_cast < const DataTypeUInt32 * > ( & type ) )
| | ( is_uint64 = typeid_cast < const DataTypeUInt64 * > ( & type ) )
| | ( is_int8 = typeid_cast < const DataTypeInt8 * > ( & type ) )
| | ( is_int16 = typeid_cast < const DataTypeInt16 * > ( & type ) )
| | ( is_int32 = typeid_cast < const DataTypeInt32 * > ( & type ) )
| | ( is_int64 = typeid_cast < const DataTypeInt64 * > ( & type ) )
| | ( is_float32 = typeid_cast < const DataTypeFloat32 * > ( & type ) )
| | ( is_float64 = typeid_cast < const DataTypeFloat64 * > ( & type ) ) ;
if ( is_uint8 | | is_uint16 | | is_uint32 | | is_uint64 )
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{
if ( src . getType ( ) = = Field : : Types : : Int64 )
throw Exception ( " Type mismatch in IN section: " + type . getName ( ) + " at left, signed literal at right " ) ;
if ( src . getType ( ) = = Field : : Types : : Float64 )
throw Exception ( " Type mismatch in IN section: " + type . getName ( ) + " at left, floating point literal at right " ) ;
if ( src . getType ( ) = = Field : : Types : : UInt64 )
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{
UInt64 value = src . get < const UInt64 & > ( ) ;
if ( ( is_uint8 & & value > std : : numeric_limits < uint8_t > : : max ( ) )
| | ( is_uint16 & & value > std : : numeric_limits < uint16_t > : : max ( ) )
| | ( is_uint32 & & value > std : : numeric_limits < uint32_t > : : max ( ) ) )
throw Exception ( " Value ( " + toString ( value ) + " ) in IN section is out of range of type " + type . getName ( ) + " at left " ) ;
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return src ;
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}
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throw Exception ( " Type mismatch in IN section: " + type . getName ( ) + " at left, "
+ Field : : Types : : toString ( src . getType ( ) ) + " literal at right " ) ;
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}
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else if ( is_int8 | | is_int16 | | is_int32 | | is_int64 )
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{
if ( src . getType ( ) = = Field : : Types : : Float64 )
throw Exception ( " Type mismatch in IN section: " + type . getName ( ) + " at left, floating point literal at right " ) ;
if ( src . getType ( ) = = Field : : Types : : UInt64 )
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{
UInt64 value = src . get < const UInt64 & > ( ) ;
if ( ( is_int8 & & value > uint8_t ( std : : numeric_limits < int8_t > : : max ( ) ) )
| | ( is_int16 & & value > uint16_t ( std : : numeric_limits < int16_t > : : max ( ) ) )
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| | ( is_int32 & & value > uint32_t ( std : : numeric_limits < int32_t > : : max ( ) ) )
| | ( is_int64 & & value > uint64_t ( std : : numeric_limits < int64_t > : : max ( ) ) ) )
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throw Exception ( " Value ( " + toString ( value ) + " ) in IN section is out of range of type " + type . getName ( ) + " at left " ) ;
return Field ( Int64 ( value ) ) ;
}
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if ( src . getType ( ) = = Field : : Types : : Int64 )
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{
Int64 value = src . get < const Int64 & > ( ) ;
if ( ( is_int8 & & ( value < std : : numeric_limits < int8_t > : : min ( ) | | value > std : : numeric_limits < int8_t > : : max ( ) ) )
| | ( is_int16 & & ( value < std : : numeric_limits < int16_t > : : min ( ) | | value > std : : numeric_limits < int16_t > : : max ( ) ) )
| | ( is_int32 & & ( value < std : : numeric_limits < int32_t > : : min ( ) | | value > std : : numeric_limits < int32_t > : : max ( ) ) ) )
throw Exception ( " Value ( " + toString ( value ) + " ) in IN section is out of range of type " + type . getName ( ) + " at left " ) ;
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return src ;
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}
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throw Exception ( " Type mismatch in IN section: " + type . getName ( ) + " at left, "
+ Field : : Types : : toString ( src . getType ( ) ) + " literal at right " ) ;
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}
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else if ( is_float32 | | is_float64 )
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{
if ( src . getType ( ) = = Field : : Types : : UInt64 )
return Field ( Float64 ( src . get < UInt64 > ( ) ) ) ;
if ( src . getType ( ) = = Field : : Types : : Int64 )
return Field ( Float64 ( src . get < Int64 > ( ) ) ) ;
if ( src . getType ( ) = = Field : : Types : : Float64 )
return src ;
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throw Exception ( " Type mismatch in IN section: " + type . getName ( ) + " at left, "
+ Field : : Types : : toString ( src . getType ( ) ) + " literal at right " ) ;
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}
}
/// В остальных случаях, приведение типа не осуществляется.
return src ;
}
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void Set : : createFromAST ( DataTypes & types , ASTPtr node , bool create_ordered_set )
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{
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/** NOTE:
* Н а д а н н ы й м о м е н т в с е к ц и и IN н е п о д д е р ж и в а ю т с я в ы р а ж е н и я ( в ы з о в ы ф у н к ц и й ) , к р о м е к о р т е ж е й .
* Т о е с т ь , н а п р и м е р , н е п о д д е р ж и в а ю т с я м а с с и в ы . А п о х о р о ш е м у , х о т е л о с ь б ы п о д д е р ж и в а т ь .
* Д л я э т о г о м о ж н о с д е л а т ь constant folding с п о м о щ ь ю ExpressionAnalyzer / ExpressionActions .
* Н о п р и э т о м , к о н е ч н о ж е , н е з а б ы т ь п р о п р о и з в о д и т е л ь н о с т ь р а б о т ы с к р у п н ы м и м н о ж е с т в а м и .
*/
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data_types = types ;
/// Засунем множество в блок.
Block block ;
for ( size_t i = 0 , size = data_types . size ( ) ; i < size ; + + i )
{
ColumnWithNameAndType col ;
col . type = data_types [ i ] ;
col . column = data_types [ i ] - > createColumn ( ) ;
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col . name = " _ " + toString ( i ) ;
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block . insert ( col ) ;
}
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ASTExpressionList & list = typeid_cast < ASTExpressionList & > ( * node ) ;
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for ( ASTs : : iterator it = list . children . begin ( ) ; it ! = list . children . end ( ) ; + + it )
{
if ( data_types . size ( ) = = 1 )
{
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if ( ASTLiteral * lit = typeid_cast < ASTLiteral * > ( & * * it ) )
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block . getByPosition ( 0 ) . column - > insert ( convertToType ( lit - > value , * data_types [ 0 ] ) ) ;
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else
throw Exception ( " Incorrect element of set. Must be literal. " , ErrorCodes : : INCORRECT_ELEMENT_OF_SET ) ;
}
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else if ( ASTFunction * func = typeid_cast < ASTFunction * > ( & * * it ) )
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{
if ( func - > name ! = " tuple " )
throw Exception ( " Incorrect element of set. Must be tuple. " , ErrorCodes : : INCORRECT_ELEMENT_OF_SET ) ;
size_t tuple_size = func - > arguments - > children . size ( ) ;
if ( tuple_size ! = data_types . size ( ) )
throw Exception ( " Incorrect size of tuple in set. " , ErrorCodes : : INCORRECT_ELEMENT_OF_SET ) ;
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for ( size_t j = 0 ; j < tuple_size ; + + j )
{
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if ( ASTLiteral * lit = typeid_cast < ASTLiteral * > ( & * func - > arguments - > children [ j ] ) )
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block . getByPosition ( j ) . column - > insert ( convertToType ( lit - > value , * data_types [ j ] ) ) ;
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else
throw Exception ( " Incorrect element of tuple in set. Must be literal. " , ErrorCodes : : INCORRECT_ELEMENT_OF_SET ) ;
}
}
else
throw Exception ( " Incorrect element of set " , ErrorCodes : : INCORRECT_ELEMENT_OF_SET ) ;
/// NOTE: Потом можно реализовать возможность задавать константные выражения в множествах.
}
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if ( create_ordered_set )
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ordered_set_elements = OrderedSetElementsPtr ( new OrderedSetElements ( ) ) ;
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insertFromBlock ( block , create_ordered_set ) ;
if ( create_ordered_set )
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std : : sort ( ordered_set_elements - > begin ( ) , ordered_set_elements - > end ( ) ) ;
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}
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void Set : : execute ( Block & block , const ColumnNumbers & arguments , size_t result , bool negative ) const
{
ColumnUInt8 * c_res = new ColumnUInt8 ;
block . getByPosition ( result ) . column = c_res ;
ColumnUInt8 : : Container_t & vec_res = c_res - > getData ( ) ;
vec_res . resize ( block . getByPosition ( arguments [ 0 ] ) . column - > size ( ) ) ;
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Poco : : ScopedReadRWLock lock ( rwlock ) ;
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/// Если множество пусто
if ( data_types . empty ( ) )
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{
if ( negative )
memset ( & vec_res [ 0 ] , 1 , vec_res . size ( ) ) ;
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else
memset ( & vec_res [ 0 ] , 0 , vec_res . size ( ) ) ;
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return ;
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}
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DataTypeArray * array_type = typeid_cast < DataTypeArray * > ( & * block . getByPosition ( arguments [ 0 ] ) . type ) ;
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if ( array_type )
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{
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if ( data_types . size ( ) ! = 1 | | arguments . size ( ) ! = 1 )
throw Exception ( " Number of columns in section IN doesn't match. " , ErrorCodes : : NUMBER_OF_COLUMNS_DOESNT_MATCH ) ;
if ( array_type - > getNestedType ( ) - > getName ( ) ! = data_types [ 0 ] - > getName ( ) )
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throw Exception ( std : : string ( ) + " Types in section IN don't match: " + data_types [ 0 ] - > getName ( ) + " on the right, " + array_type - > getNestedType ( ) - > getName ( ) + " on the left. " , ErrorCodes : : TYPE_MISMATCH ) ;
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IColumn * in_column = & * block . getByPosition ( arguments [ 0 ] ) . column ;
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/// Константный столбец слева от IN поддерживается не напрямую. Для этого, он сначала материализуется.
ColumnPtr materialized_column ;
if ( in_column - > isConst ( ) )
{
materialized_column = static_cast < const IColumnConst * > ( in_column ) - > convertToFullColumn ( ) ;
in_column = materialized_column . get ( ) ;
}
if ( ColumnArray * col = typeid_cast < ColumnArray * > ( in_column ) )
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executeArray ( col , vec_res , negative ) ;
else
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throw Exception ( " Unexpected array column type: " + in_column - > getName ( ) , ErrorCodes : : ILLEGAL_COLUMN ) ;
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}
else
{
if ( data_types . size ( ) ! = arguments . size ( ) )
throw Exception ( " Number of columns in section IN doesn't match. " , ErrorCodes : : NUMBER_OF_COLUMNS_DOESNT_MATCH ) ;
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/// Запоминаем столбцы, с которыми будем работать. Также проверим, что типы данных правильные.
ConstColumnPlainPtrs key_columns ( arguments . size ( ) ) ;
for ( size_t i = 0 ; i < arguments . size ( ) ; + + i )
{
key_columns [ i ] = block . getByPosition ( arguments [ i ] ) . column ;
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if ( data_types [ i ] - > getName ( ) ! = block . getByPosition ( arguments [ i ] ) . type - > getName ( ) )
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throw Exception ( " Types of column " + toString ( i + 1 ) + " in section IN don't match: " + data_types [ i ] - > getName ( ) + " on the right, " + block . getByPosition ( arguments [ i ] ) . type - > getName ( ) + " on the left. " , ErrorCodes : : TYPE_MISMATCH ) ;
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}
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/// Константные столбцы слева от IN поддерживается не напрямую. Для этого, они сначала материализуется.
Columns materialized_columns ;
for ( auto & column_ptr : key_columns )
{
if ( column_ptr - > isConst ( ) )
{
materialized_columns . emplace_back ( static_cast < const IColumnConst * > ( column_ptr ) - > convertToFullColumn ( ) ) ;
column_ptr = materialized_columns . back ( ) . get ( ) ;
}
}
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executeOrdinary ( key_columns , vec_res , negative ) ;
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}
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}
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template < typename Method >
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void NO_INLINE Set : : executeImpl (
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Method & method ,
const ConstColumnPlainPtrs & key_columns ,
ColumnUInt8 : : Container_t & vec_res ,
bool negative ,
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size_t rows ) const
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{
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typename Method : : State state ;
state . init ( key_columns ) ;
size_t keys_size = key_columns . size ( ) ;
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/// NOTE Н е используется оптимизация для подряд идущих одинаковых значений.
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/// Для всех строчек
for ( size_t i = 0 ; i < rows ; + + i )
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{
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/// Строим ключ
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typename Method : : Key key = state . getKey ( key_columns , keys_size , i , key_sizes ) ;
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vec_res [ i ] = negative ^ ( method . data . end ( ) ! = method . data . find ( key ) ) ;
}
}
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template < typename Method >
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void NO_INLINE Set : : executeArrayImpl (
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Method & method ,
const ConstColumnPlainPtrs & key_columns ,
const ColumnArray : : Offsets_t & offsets ,
ColumnUInt8 : : Container_t & vec_res ,
bool negative ,
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size_t rows ) const
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{
typename Method : : State state ;
state . init ( key_columns ) ;
size_t keys_size = key_columns . size ( ) ;
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size_t prev_offset = 0 ;
/// Для всех строчек
for ( size_t i = 0 ; i < rows ; + + i )
{
UInt8 res = 0 ;
/// Для всех элементов
for ( size_t j = prev_offset ; j < offsets [ i ] ; + + j )
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{
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/// Строим ключ
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typename Method : : Key key = state . getKey ( key_columns , keys_size , i , key_sizes ) ;
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res | = negative ^ ( method . data . end ( ) ! = method . data . find ( key ) ) ;
if ( res )
break ;
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}
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vec_res [ i ] = res ;
prev_offset = offsets [ i ] ;
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}
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}
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void Set : : executeOrdinary ( const ConstColumnPlainPtrs & key_columns , ColumnUInt8 : : Container_t & vec_res , bool negative ) const
{
size_t rows = key_columns [ 0 ] - > size ( ) ;
if ( false ) { }
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# define M(NAME) \
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else if ( data . type = = SetVariants : : Type : : NAME ) \
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executeImpl ( * data . NAME , key_columns , vec_res , negative , rows ) ;
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APPLY_FOR_SET_VARIANTS ( M )
# undef M
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else
throw Exception ( " Unknown set variant. " , ErrorCodes : : UNKNOWN_SET_DATA_VARIANT ) ;
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}
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void Set : : executeArray ( const ColumnArray * key_column , ColumnUInt8 : : Container_t & vec_res , bool negative ) const
{
size_t rows = key_column - > size ( ) ;
const ColumnArray : : Offsets_t & offsets = key_column - > getOffsets ( ) ;
const IColumn & nested_column = key_column - > getData ( ) ;
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if ( false ) { }
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# define M(NAME) \
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else if ( data . type = = SetVariants : : Type : : NAME ) \
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executeArrayImpl ( * data . NAME , ConstColumnPlainPtrs { key_column } , offsets , vec_res , negative , rows ) ;
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APPLY_FOR_SET_VARIANTS ( M )
# undef M
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else
throw Exception ( " Unknown set variant. " , ErrorCodes : : UNKNOWN_SET_DATA_VARIANT ) ;
}
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BoolMask Set : : mayBeTrueInRange ( const Range & range )
{
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if ( ! ordered_set_elements )
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throw DB : : Exception ( " Ordered set in not created. " ) ;
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if ( ordered_set_elements - > empty ( ) )
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return BoolMask ( false , true ) ;
const Field & left = range . left ;
const Field & right = range . right ;
bool can_be_true ;
bool can_be_false = true ;
/// Если во всем диапазоне одинаковый ключ и он есть в Set, то выбираем блок для in и не выбираем для notIn
if ( range . left_bounded & & range . right_bounded & & range . right_included & & range . left_included & & left = = right )
{
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if ( std : : binary_search ( ordered_set_elements - > begin ( ) , ordered_set_elements - > end ( ) , left ) )
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{
can_be_false = false ;
can_be_true = true ;
}
else
{
can_be_true = false ;
can_be_false = true ;
}
}
else
{
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auto left_it = range . left_bounded ? std : : lower_bound ( ordered_set_elements - > begin ( ) , ordered_set_elements - > end ( ) , left ) : ordered_set_elements - > begin ( ) ;
if ( range . left_bounded & & ! range . left_included & & left_it ! = ordered_set_elements - > end ( ) & & * left_it = = left )
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+ + left_it ;
/// если весь диапазон, правее in
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if ( left_it = = ordered_set_elements - > end ( ) )
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{
can_be_true = false ;
}
else
{
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auto right_it = range . right_bounded ? std : : upper_bound ( ordered_set_elements - > begin ( ) , ordered_set_elements - > end ( ) , right ) : ordered_set_elements - > end ( ) ;
if ( range . right_bounded & & ! range . right_included & & right_it ! = ordered_set_elements - > begin ( ) & & * ( right_it - - ) = = right )
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- - right_it ;
/// весь диапазон, левее in
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if ( right_it = = ordered_set_elements - > begin ( ) )
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{
can_be_true = false ;
}
else
{
- - right_it ;
/// в диапазон не попадает ни одного ключа из in
if ( * right_it < * left_it )
{
can_be_true = false ;
}
else
{
can_be_true = true ;
}
}
}
}
return BoolMask ( can_be_true , can_be_false ) ;
}
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}