Class TDbCol

class TDbCol;

Description

Defines a column in a table or rowset.

The data members are public because this is really a structure to group the attributes of the column together.

Three non-default constructors are provided for convenience.

Members

Defined in TDbCol:

• EAutoIncrement
• ENotNull
• IsLong(TDbColType)Tests if a column is of the Long column type, i.e. one of the EDbColLongXxxx typ...
• TDbCol()Constructs an uninitialised TDbCol. It is necessary because there are also non-d...
• TDbCol(const TDbCol &)TDbCol copy constructor.
• TDbCol(const TDesC &,TDbColType)
• TDbCol(const TDesC &,TDbColType,TInt)Constructs a TDbCol with the given name, optional type and optional maximum leng...
• anonymous
• iAttributesA set of flags describing other column attributes. This must be one of the anony...
• iMaxLengthThe maximum length of data that can be stored in a Text or Binary column.
• iNameThe column name.
• iTypeThe column type.
• operator=(const TDbCol &)TDbCol "=" operator.

inline TDbCol();

Description

Constructs an uninitialised TDbCol. It is necessary because there are also non-default constructors in this class.

inline TDbCol(const TDbCol &);

Description

TDbCol copy constructor.

Parameters

IMPORT_C TDbCol(const TDesC &aName, TDbColType aType);

Description

Parameters

IMPORT_C TDbCol(const TDesC &aName, TDbColType aType, TInt aMaxLength);

Description

Constructs a TDbCol with the given name, optional type and optional maximum length.

Note: The iAttributes member is initialised to 0.

Parameters

inline TDbCol& operator=(const TDbCol &);

Description

TDbCol "=" operator.

Parameters

Return value

static inline TBool IsLong(TDbColType aType);

Description

Tests if a column is of the Long column type, i.e. one of the EDbColLongXxxx types.

Parameters

Return value

n/a

Description

TDbColType iType;

Description

The column type.

TInt iMaxLength;

Description

The maximum length of data that can be stored in a Text or Binary column.

TUint iAttributes;

Description

A set of flags describing other column attributes. This must be one of the anonymous enum values ENotNull or EAutoIncrement.

TDbColNameC iName;

Description

The column name.