ExecIndexRow

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Deprecated

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org.apache.derby.iapi.sql.execute
Interface ExecIndexRow

All Superinterfaces:: ExecRow, org.apache.derby.iapi.sql.Row

public interface ExecIndexRow
extends ExecRow

This is an extension of ExecRow for use with indexes and sorting.

Method Summary

boolean areNullsOrdered(int columnPosition)
          Return true if orderedNulls was called on this ExecIndexRow for the given column position.

void execRowToExecIndexRow(ExecRow valueRow)
          Turn the ExecRow into an ExecIndexRow.

void orderedNulls(int columnPosition)
          These two methods are a sort of a hack.

Methods inherited from interface org.apache.derby.iapi.sql.execute.ExecRow

cloneColumn, getClone, getClone, getNewNullRow, getNewObjectArray, getRowArray, getRowArrayClone, setRowArray, setRowArray

Methods inherited from interface org.apache.derby.iapi.sql.Row

getColumn, nColumns, setColumn

Method Detail

orderedNulls

public void orderedNulls(int columnPosition)

These two methods are a sort of a hack. The store implements ordered null semantics for start and stop positioning, which is correct for IS NULL and incorrect for everything else. To work around this, TableScanResultSet will check whether the start and stop positions have NULL in any column position other than for an IS NULL check. If so, it won't do the scan (that is, it will return no rows). This method is to inform this ExecIndexRow (which can be used for start and stop positioning) that the given column uses ordered null semantics.

areNullsOrdered

public boolean areNullsOrdered(int columnPosition)

Return true if orderedNulls was called on this ExecIndexRow for the given column position.

execRowToExecIndexRow

public void execRowToExecIndexRow(ExecRow valueRow)

Turn the ExecRow into an ExecIndexRow.