public static class ExpressionTree.LeafNode extends ExpressionTree.TreeNode
Modifier and Type | Field and Description |
---|---|
boolean |
isReverseOrder |
java.lang.String |
keyName |
ExpressionTree.Operator |
operator |
java.lang.Object |
value
Constant expression side of the operator.
|
Constructor and Description |
---|
LeafNode() |
Modifier and Type | Method and Description |
---|---|
void |
accept(ExpressionTree.TreeVisitor visitor)
Double dispatch for TreeVisitor.
|
java.lang.String |
generateJDOFilter(Table table,
java.util.Map<java.lang.String,java.lang.Object> params)
Generates a JDO filter statement
|
java.lang.String |
getFilterPushdownParam(Table table,
int partColIndex)
Validates and gets the query parameter for filter pushdown based on the column
and the constant stored in this node.
|
int |
getPartColIndexForFilter(Table table)
Get partition column index in the table partition column list that
corresponds to the key that is being filtered on by this tree node.
|
getAndOr, getLhs, getRhs
public java.lang.String keyName
public ExpressionTree.Operator operator
public java.lang.Object value
public boolean isReverseOrder
public void accept(ExpressionTree.TreeVisitor visitor) throws MetaException
ExpressionTree.TreeNode
accept
in class ExpressionTree.TreeNode
MetaException
public java.lang.String generateJDOFilter(Table table, java.util.Map<java.lang.String,java.lang.Object> params) throws MetaException
ExpressionTree.TreeNode
generateJDOFilter
in class ExpressionTree.TreeNode
table
- The table on which the filter is applied. If table is not null,
then this method generates a JDO statement to get all partitions
of the table that match the filter.
If table is null, then this method generates a JDO statement to get all
tables that match the filter.params
- A map of parameter key to values for the filter statement.MetaException
public int getPartColIndexForFilter(Table table) throws MetaException
table
- The table.MetaException
public java.lang.String getFilterPushdownParam(Table table, int partColIndex) throws MetaException
table
- The table.partColIndex
- The index of the column to check.MetaException
Copyright © 2012 The Apache Software Foundation