public static class QueryPlan.LeftOuterJoinNode extends QueryPlan.SingleQueryPlanNode
To use - first the complete left table in the join must be marked with a name. Then the ON expression is evaluated to a single plan node. Then this plan node must be added to result in a left outer join. A tree for a left outer join may look as follows;
LeftOuterJoinNode | Join a = b / \ Marker GetTable T2 | GetTable T1
child
Constructor and Description |
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LeftOuterJoinNode(QueryPlanNode child,
String complete_mark_name) |
Modifier and Type | Method and Description |
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Table |
evaluate(QueryContext context)
Evaluates the node and returns the result as a Table.
|
String |
titleString() |
child, clone, debugString, discoverCorrelatedVariables, discoverTableNames
public LeftOuterJoinNode(QueryPlanNode child, String complete_mark_name)
public Table evaluate(QueryContext context)
QueryPlanNode
public String titleString()
titleString
in class QueryPlan.SingleQueryPlanNode
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