RDM::DB::QUERY Namespace Reference

The RDM Database Query Namespace. More...

Data Structures
class	inner_join_by_key
	Inner join by key. More...
class	inner_join_by_reference
	Inner join by reference. More...
class	inner_join_by_referenced
	Inner join by referenced. More...
class	inner_join_by_referencing
	Inner join by referencing. More...
class	join_by_key
	Template base class for doing a join by key. More...
class	join_rows
	Template base class for doing a join. More...
class	join_rows_to_many
	Template base class for doing a join for one to many. More...
class	join_rows_to_one
class	outer_join_by_key
	Outer join by key. More...
class	outer_join_by_reference
	Outer join by reference. More...
class	outer_join_by_referenced
	Outer join by referenced. More...
class	outer_join_by_referencing
	Outer join by referencing. More...

Enumerations
enum	position { POS_NOT_SET = 0, POS_BEFORE_FIRST = 1, POS_ESTABLISHED_BEFORE_FIRST = 2, POS_SET = 3, POS_AFTER_LAST = -1 }
	The position in an ordered set of rows. More...

Detailed Description

The RDM Database Query Namespace.

The RDM Database Query Namespace contains a set of template classes used for querying data from RDM by different types of join.

Enumeration Type Documentation

position

enum RDM::DB::QUERY::position

The position in an ordered set of rows.

The position in an ordered set of rows. This is used for many of the classes here to determine how to fetch the next or previous combination of rows for a join.

Enumerator
POS_NOT_SET	The position is not set and fetch_first or fetch_last has to be called to establish a position
POS_BEFORE_FIRST	The position for the cursor is set before its first position
POS_ESTABLISHED_BEFORE_FIRST	The position for the cursor is set before its first position as set by the cursor association. Navigating from this position can only be done if we navigate forward.
POS_SET	The position for the cursor is set at a normal row position
POS_AFTER_LAST	The position for the cursor is set after its last position

 {
POS_NOT_SET = 0, 
POS_BEFORE_FIRST = 1, 
POS_ESTABLISHED_BEFORE_FIRST = 2, 
POS_SET = 3, 
POS_AFTER_LAST = -1, 
 } position;