NoPutResultSet

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Deprecated

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

All Superinterfaces:: org.apache.derby.iapi.sql.ResultSet, org.apache.derby.iapi.store.access.RowLocationRetRowSource, org.apache.derby.iapi.store.access.RowSource

public interface NoPutResultSet
extends org.apache.derby.iapi.sql.ResultSet, org.apache.derby.iapi.store.access.RowLocationRetRowSource

The NoPutResultSet interface is used to provide additional operations on result sets that can be used in returning rows up a ResultSet tree.

Since the ResulSet operations must also be supported by NoPutResultSets, we extend that interface here as well.

Field Summary

static java.lang.String ABSOLUTE


static java.lang.String FIRST


static java.lang.String LAST


static java.lang.String NEXT


static java.lang.String PREVIOUS


static java.lang.String RELATIVE


Fields inherited from interface org.apache.derby.iapi.sql.ResultSet

CURRENT_RESULTSET_ONLY, ENTIRE_RESULTSET_TREE, ISAFTERLAST, ISBEFOREFIRST, ISFIRST, ISLAST

Method Summary

void clearCurrentRow()
          Clear the current row

double getEstimatedRowCount()
          Get the estimated row count from this result set.

ExecRow getNextRowCore()
          Return the requested values computed from the next row (if any) for which the restriction evaluates to true.

int getPointOfAttachment()
          Return the point of attachment for this subquery.

int getScanIsolationLevel()
          Return the isolation level of the scan in the result set.

boolean isForUpdate()
          Is this ResultSet or it's source result set for update

void markAsTopResultSet()
          Mark the ResultSet as the topmost one in the ResultSet tree.

void openCore()
          open a scan on the table.

void reopenCore()
          reopen the scan.

boolean requiresRelocking()
          Do we need to relock the row when going to the heap.

int resultSetNumber()
          Get the number of this ResultSet, which is guaranteed to be unique within a statement.

void setCurrentRow(ExecRow row)
          Set the current row to the row passed in.

void setNeedsRowLocation(boolean needsRowLocation)
          Set whether or not the NPRS need the row location when acting as a row source.

void setTargetResultSet(TargetResultSet trs)
          Notify a NPRS that it is the source for the specified TargetResultSet.

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

checkRowPosition, cleanUp, close, finish, getAbsoluteRow, getAutoGeneratedKeysResultset, getBeginExecutionTimestamp, getCursorName, getEndExecutionTimestamp, getExecuteTime, getFirstRow, getLastRow, getNextRow, getPreviousRow, getRelativeRow, getResultDescription, getRowNumber, getSubqueryTrackingArray, getTimeSpent, getWarnings, isClosed, modifiedRowCount, open, returnsRows, setAfterLastRow, setBeforeFirstRow

Methods inherited from interface org.apache.derby.iapi.store.access.RowLocationRetRowSource

needsRowLocation, rowLocation

Methods inherited from interface org.apache.derby.iapi.store.access.RowSource

closeRowSource, getNextRowFromRowSource, getValidColumns, needsToClone

Field Detail

ABSOLUTE

public static final java.lang.String ABSOLUTE

See Also:: Constant Field Values

RELATIVE

public static final java.lang.String RELATIVE

See Also:: Constant Field Values

FIRST

public static final java.lang.String FIRST

See Also:: Constant Field Values

public static final java.lang.String NEXT

See Also:: Constant Field Values

LAST

public static final java.lang.String LAST

See Also:: Constant Field Values

public static final java.lang.String PREVIOUS

See Also:: Constant Field Values

Method Detail

markAsTopResultSet

public void markAsTopResultSet()

Mark the ResultSet as the topmost one in the ResultSet tree. Useful for closing down the ResultSet on an error.

openCore

public void openCore()
              throws org.apache.derby.iapi.error.StandardException

open a scan on the table. scan parameters are evaluated at each open, so there is probably some way of altering their values...

openCore() can only be called on a closed result set. see reopenCore if you want to reuse an open result set.

reopenCore

public void reopenCore()
                throws org.apache.derby.iapi.error.StandardException

reopen the scan. behaves like openCore() but is optimized where appropriate (e.g. where scanController has special logic for us).

used by joiners

scan parameters are evaluated at each open, so there is probably some way of altering their values...

getNextRowCore

public ExecRow getNextRowCore()
                       throws org.apache.derby.iapi.error.StandardException

Return the requested values computed from the next row (if any) for which the restriction evaluates to true.

restriction and projection parameters are evaluated for each row.

getPointOfAttachment

public int getPointOfAttachment()

Return the point of attachment for this subquery. (Only meaningful for Any and Once ResultSets, which can and will only be at the top of a ResultSet for a subquery.)

getScanIsolationLevel

public int getScanIsolationLevel()

Return the isolation level of the scan in the result set. Only expected to be called for those ResultSets that contain a scan.

setTargetResultSet

public void setTargetResultSet(TargetResultSet trs)

Notify a NPRS that it is the source for the specified TargetResultSet. This is useful when doing bulk insert.

setNeedsRowLocation

public void setNeedsRowLocation(boolean needsRowLocation)

Set whether or not the NPRS need the row location when acting as a row source. (The target result set determines this.)

getEstimatedRowCount

public double getEstimatedRowCount()

Get the estimated row count from this result set.

resultSetNumber

public int resultSetNumber()

Get the number of this ResultSet, which is guaranteed to be unique within a statement.

setCurrentRow

public void setCurrentRow(ExecRow row)

Set the current row to the row passed in.

clearCurrentRow

public void clearCurrentRow()

Clear the current row

requiresRelocking

public boolean requiresRelocking()

Do we need to relock the row when going to the heap.

isForUpdate

public boolean isForUpdate()

Is this ResultSet or it's source result set for update