Library: Data
Package: DataCore
Header: Poco/Data/BulkExtraction.h
Description
Container Data Type specialization extension for extraction of values from a query result set.
This class is intended for PocoData internal use - it is used by StatementImpl to automaticaly create internal BulkExtraction in cases when statement returns data and no external storage was supplied. It is later used by RecordSet to retrieve the fetched data after statement execution. It takes ownership of the Column pointer supplied as constructor argument. Column object, in turn owns the data container pointer.
InternalBulkExtraction objects can not be copied or assigned.
Inheritance
Direct Base Classes: BulkExtraction < C >
All Base Classes: BulkExtraction < C >
Member Summary
Member Functions: column, isNull, reset, value
Types Aliases
CValType
using CValType = typename C::value_type;
Ptr
using Ptr = SharedPtr < Type >;
Type
using Type = InternalBulkExtraction < ValType >;
ValPtr
using ValPtr = SharedPtr < ValType >;
ValType
using ValType = C;
Constructors
InternalBulkExtraction 
InternalBulkExtraction(
C & result,
Column < C > * pColumn,
Poco::UInt32 limit,
const Position & pos = Position (0)
);
Creates InternalBulkExtraction.
Destructor
~InternalBulkExtraction
Destroys InternalBulkExtraction.
Member Functions
column
const Column < C > & column() const;
isNull
bool isNull(
std::size_t row
) const;
reset
void reset();
value
const CValType & value(
int index
) const;