org.vanilladb.core.query.algebra

Interface UpdateScan

All Superinterfaces:

Record, Scan

All Known Implementing Classes:

IndexSelectScan, SelectScan, TableScan

public interface UpdateScan
extends Scan

The interface implemented by all updatable scans.

Method Summary

Modifier and Type	Method and Description
void	delete() Deletes the current record from the scan.
RecordId	getRecordId() Returns the RecordId of the current record.
void	insert() Inserts a new record somewhere in the scan.
void	moveToRecordId(RecordId rid) Positions the scan so that the current record has the specified record ID .
void	setVal(String fldName, Constant val) Modifies the field value of the current record.

Methods inherited from interface org.vanilladb.core.query.algebra.Scan

beforeFirst, close, hasField, next

Methods inherited from interface org.vanilladb.core.sql.Record

getVal

Method Detail

setVal

void setVal(String fldName,
            Constant val)

Modifies the field value of the current record.

Parameters:

fldName - the name of the field

val - the new value, expressed as a Constant

insert

void insert()

Inserts a new record somewhere in the scan.

delete

void delete()

Deletes the current record from the scan.

getRecordId

RecordId getRecordId()

Returns the RecordId of the current record.

Returns:

the RecordId of the current record

moveToRecordId

void moveToRecordId(RecordId rid)

Positions the scan so that the current record has the specified record ID .

Parameters:

rid - the RecordId of the desired record