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java.lang.Objectcom.mckoi.database.QueryPlan.SingleQueryPlanNode
com.mckoi.database.QueryPlan.SubsetNode
public static class QueryPlan.SubsetNode
The node for finding a subset and renaming the columns of the results in the child node.
Field Summary |
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Fields inherited from class com.mckoi.database.QueryPlan.SingleQueryPlanNode |
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child |
Constructor Summary | |
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QueryPlan.SubsetNode(QueryPlanNode child,
Variable[] original_columns,
Variable[] new_column_names)
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Method Summary | |
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java.lang.Object |
clone()
Deep clone. |
Table |
evaluate(QueryContext context)
Evaluates the node and returns the result as a Table. |
Variable[] |
getNewColumnNames()
Returns the list of new column names that represent the new columns in this subset. |
Variable[] |
getOriginalColumns()
Returns the list of original columns that represent the mappings from the columns in this subset. |
void |
setGivenName(TableName name)
Sets the given table name of the resultant table. |
java.lang.String |
titleString()
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Methods inherited from class com.mckoi.database.QueryPlan.SingleQueryPlanNode |
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child, debugString, discoverCorrelatedVariables, discoverTableNames |
Methods inherited from class java.lang.Object |
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equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public QueryPlan.SubsetNode(QueryPlanNode child, Variable[] original_columns, Variable[] new_column_names)
Method Detail |
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public Table evaluate(QueryContext context)
QueryPlanNode
public void setGivenName(TableName name)
public Variable[] getOriginalColumns()
public Variable[] getNewColumnNames()
public java.lang.Object clone() throws java.lang.CloneNotSupportedException
QueryPlan.SingleQueryPlanNode
clone
in interface QueryPlanNode
clone
in class QueryPlan.SingleQueryPlanNode
java.lang.CloneNotSupportedException
public java.lang.String titleString()
titleString
in class QueryPlan.SingleQueryPlanNode
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