public final Class UntypedNullConstantNode

Constructor for an UntypedNullConstantNode. Untyped constants contain no state (not too surprising).

Overrides org.apache.derby.impl.sql.compile.ConstantNode.bindExpression.

Doc from org.apache.derby.impl.sql.compile.ConstantNode.bindExpression.

Bind this expression. This means binding the sub-expressions, as well as figuring out what the return type is for this expression. In this case, there are no sub-expressions, and the return type is already known, so this is just a stub.

Parameters

fromList:FromList

The FROM list for the query this expression is in, for binding columns.

subqueryList:SubqueryList

The subquery list being built as we find SubqueryNodes

aggregates:List<AggregateNode>

The aggregate list being built as we find AggregateNodes

Returns:ValueNode

The new top of the expression tree.

Annotations

@Override

See Also

ValueNode#bindExpression(FromList, SubqueryList, List), This does nothing-- the node is actually bound when bindUntypedNullsToResultColumns is called.

Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.convertDefaultNode.

Translate a Default node into a default value, given a type descriptor.

Parameters

typeDescriptor:DataTypeDescriptor

A description of the required data type.

Annotations

@Override

Exceptions

StandardException:

Doc from org.apache.derby.impl.sql.compile.QueryTreeNode.convertDefaultNode.

Thrown on error

Implements abstract org.apache.derby.impl.sql.compile.ConstantNode.generateConstant.

Should never be called for UntypedNullConstantNode because we shouldn't make it to generate

Parameters

acb:ExpressionClassBuilder

The ExpressionClassBuilder for the class being built

mb:MethodBuilder

The method the expression will go into