CDynamicAccessor Class

Article
12/18/2017

The latest version of this topic can be found at CDynamicAccessor Class.

Allows you to access a data source when you have no knowledge of the database schema (the database's underlying structure).

Syntax

class CDynamicAccessor : public CAccessorBase

Members

Methods

AddBindEntry	Adds a bind entry to the output columns when overriding the default accessor.
CDynamicAccessor	Instantiates and initializes the `CDynamicAccessor` object.
Close	Unbinds all the columns, releases the allocated memory, and releases the IAccessor interface pointer in the class.
GetBookmark	Retrieves the bookmark for the current row.
GetBlobHandling	Retrieves the BLOB handling value for the current row.
GetBlobSizeLimit	Retrieves the maximum BLOB size in bytes.
GetColumnCount	Retrieves the number of columns in the rowset.
GetColumnFlags	Retrieves the column characteristics.
GetColumnInfo	Retrieves the column metadata.
GetColumnName	Retrieves the name of a specified column.
GetColumnType	Retrieves the data type of a specified column.
GetLength	Retrieves the maximum possible length of a column in bytes.
GetOrdinal	Retrieves the column index given a column name.
GetStatus	Retrieves the status of a specified column.
GetValue	Retrieves the data from the buffer.
SetBlobHandling	Sets the BLOB handling value for the current row.
SetBlobSizeLimit	Sets the maximum BLOB size in bytes.
SetLength	Sets the length of the column in bytes.
SetStatus	Sets the status of a specified column.
SetValue	Stores the data to the buffer.

Remarks

Use CDynamicAccessor methods to obtain column information such as column names, column count, data type, and so on. You then use this column information to create an accessor dynamically at run time.

The column information is stored in a buffer that is created and managed by this class. Obtain data from the buffer using GetValue.

For a discussion and examples of using the dynamic accessor classes, see Using Dynamic Accessors.

Requirements

Header: atldbcli.h

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