File Information
Library: Data
Package: DataCore
Header: Poco/Data/MetaColumn.h
Description
MetaColumn class contains column metadata information.
Inheritance
Known Derived Classes: Poco::Data::ODBC::ODBCMetaColumn
Member Summary
Member Functions: isNullable, length, name, operator =, position, precision, setLength, setName, setNullable, setPrecision, setType, swap, type
Enumerations
ColumnDataType
Constructors
MetaColumn
MetaColumn();
Creates the MetaColumn.
MetaColumn
MetaColumn(
const MetaColumn & other
);
Copy constructor.
MetaColumn
MetaColumn(
MetaColumn && other
) noexcept;
Move constructor.
MetaColumn
explicit MetaColumn(
std::size_t position,
const std::string & name = "",
ColumnDataType type = FDT_UNKNOWN,
std::size_t length = 0,
std::size_t precision = 0,
bool nullable = false
);
Creates the MetaColumn.
Destructor
~MetaColumn
~MetaColumn();
Destroys the MetaColumn.
Member Functions
isNullable 
bool isNullable() const;
Returns true if column allows null values, false otherwise.
length
std::size_t length() const;
Returns column maximum length.
name
const std::string & name() const;
Returns column name.
operator =
MetaColumn & operator = (
const MetaColumn & other
);
Assignment operator.
operator =
MetaColumn & operator = (
MetaColumn && other
) noexcept;
Assignment operator.
position
std::size_t position() const;
Returns column position.
precision
std::size_t precision() const;
Returns column precision. Valid for floating point fields only (zero for other data types).
swap
void swap(
MetaColumn & other
);
Swaps the contents with another instance.
type
ColumnDataType type() const;
Returns column type.
setLength 
void setLength(
std::size_t length
);
Sets the column length.
setName
void setName(
const std::string & name
);
Sets the column name.
setNullable
void setNullable(
bool nullable
);
Sets the column nullability.
setPrecision
void setPrecision(
std::size_t precision
);
Sets the column precision.
setType
void setType(
ColumnDataType type
);
Sets the column data type.