- <init>
Creates a Blackboard.
- convertExpression
- convertSortExpression
Converts an item in an ORDER BY clause, extracting DESC, NULLS LAST and NULLS
FIRST flags first.
- flatten
- getRootField
- isConvertedSubq
Determines whether a RexNode corresponds to a subquery that's been converted to
a constant.
- lookup
Creates an expression with which to reference the expression whose offset in its
from-list is offset
- lookupExp
Returns an expression with which to reference a from-list item.
- register
Registers a relational expression.
- registerSubquery
- retrieveCursors
- setDataset
Notifies this Blackboard that the root just set using #setRoot(RelNode,boolean)
was derived using da