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org.apache.derby.impl.sql.execute
Class AlterTableConstantAction  

java.lang.Object
  org.apache.derby.impl.sql.execute.GenericConstantAction
      org.apache.derby.impl.sql.execute.DDLConstantAction
          org.apache.derby.impl.sql.execute.DDLSingleTableConstantAction
              org.apache.derby.impl.sql.execute.AlterTableConstantAction

All Implemented Interfaces:

org.apache.derby.iapi.sql.execute.ConstantAction, org.apache.derby.iapi.store.access.RowLocationRetRowSource, org.apache.derby.iapi.store.access.RowSource

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class AlterTableConstantAction

extends DDLSingleTableConstantAction

implements org.apache.derby.iapi.store.access.RowLocationRetRowSource

This class describes actions that are ALWAYS performed for an ALTER TABLE Statement at Execution time.

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Field Summary
private  org.apache.derby.iapi.sql.Activation	activation
private  org.apache.derby.iapi.sql.execute.ExecRow[]	baseRow
private  org.apache.derby.iapi.types.DataValueDescriptor[][]	baseRowArray
private  int	behavior
private  int	bulkFetchSize
protected  ColumnInfo[]	columnInfo
private  int	columnPosition
private  org.apache.derby.iapi.store.access.ConglomerateController	compressHeapCC
private  org.apache.derby.iapi.store.access.GroupFetchScanController	compressHeapGSC
private  org.apache.derby.iapi.sql.dictionary.IndexRowGenerator[]	compressIRGs
private  org.apache.derby.iapi.types.RowLocation[]	compressRL
private  boolean	compressTable
protected  ConstraintConstantAction[]	constraintActions
private  int	currentCompressRow
private  org.apache.derby.iapi.sql.execute.ExecRow	currentRow
private  org.apache.derby.iapi.sql.dictionary.DataDictionary	dd
private  org.apache.derby.iapi.sql.depend.DependencyManager	dm
private  boolean	doneScan
private  long	estimatedRowCount
private  long[]	indexConglomerateNumbers
private  org.apache.derby.iapi.services.io.FormatableBitSet	indexedCols
private  org.apache.derby.iapi.sql.execute.ExecIndexRow[]	indexRows
private  org.apache.derby.iapi.sql.conn.LanguageConnectionContext	lcc
protected  char	lockGranularity
private  boolean[]	needToDropSort
private  int	numIndexes
private  org.apache.derby.iapi.store.access.ColumnOrdering[][]	ordering
private  int	rowCount
protected  org.apache.derby.catalog.UUID	schemaId
protected  org.apache.derby.iapi.sql.dictionary.SchemaDescriptor	sd
private  boolean	sequential
private  org.apache.derby.iapi.store.access.SortController[]	sorters
private  long[]	sortIds
protected  long	tableConglomerateId
protected  org.apache.derby.catalog.UUID	tableId
protected  java.lang.String	tableName
protected  int	tableType
private  org.apache.derby.iapi.store.access.TransactionController	tc
private  org.apache.derby.iapi.sql.dictionary.TableDescriptor	td
private  boolean	truncateTable
private  boolean[]	validRow

 

Fields inherited from interface org.apache.derby.iapi.sql.execute.ConstantAction

RUNTIMESTATISTICS, STATISTICSTIMING

 

Constructor Summary

(package private)

AlterTableConstantAction(org.apache.derby.iapi.sql.dictionary.SchemaDescriptor sd, java.lang.String tableName, org.apache.derby.catalog.UUID tableId, long tableConglomerateId, int tableType, ColumnInfo[] columnInfo, ConstraintConstantAction[] constraintActions, char lockGranularity, boolean compressTable, int behavior, boolean sequential, boolean truncateTable)           Make the AlterAction for an ALTER TABLE statement.

 

Method Summary
private  void	addNewColumnToTable(org.apache.derby.iapi.sql.Activation activation, int ix)           Workhorse for adding a new column to a table.
void	cleanUp()
private  void	closeBulkFetchScan()
void	closeRowSource()           closeRowSource tells the RowSource that it will no longer need to return any rows and it can release any resource it may have.
private  java.lang.Object[]	compressIndexArrays(long[] indexCIDS, org.apache.derby.iapi.sql.dictionary.IndexRowGenerator[] irgs)           Get rid of duplicates from a set of index conglomerate numbers and index descriptors.
private  void	compressTable(org.apache.derby.iapi.sql.Activation activation)
private  void	dropAllColumnDefaults(org.apache.derby.catalog.UUID tableId, org.apache.derby.iapi.sql.dictionary.DataDictionary dd)
private  void	dropColumnFromTable(org.apache.derby.iapi.sql.Activation activation, int ix)           Workhorse for dropping a column from a table.
void	execGuts(org.apache.derby.iapi.sql.Activation activation)           Wrapper for this DDL action.
void	executeConstantAction(org.apache.derby.iapi.sql.Activation activation)           This is the guts of the Execution-time logic for ALTER TABLE.
private static void	executeUpdate(org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc, java.lang.String updateStmt)
private  void	getAffectedIndexes(org.apache.derby.iapi.sql.Activation activation)           Get info on the indexes on the table being compress.
private  long	getColumnMax(org.apache.derby.iapi.sql.Activation activation, org.apache.derby.iapi.sql.dictionary.TableDescriptor td, java.lang.String columnName, long increment, long initial)           computes the minimum/maximum value in a column of a table.
org.apache.derby.iapi.types.DataValueDescriptor[]	getNextRowFromRowSource()           Get the next row as an array of column objects.
private  int	getSemiRowCount(org.apache.derby.iapi.store.access.TransactionController tc)           Return the "semi" row count of a table.
org.apache.derby.iapi.services.io.FormatableBitSet	getValidColumns()           getValidColumns describes the DataValueDescriptor[] returned by all calls to the getNextRowFromRowSource() call.
private  void	insertIntoSorter(int index, org.apache.derby.iapi.types.RowLocation rl)
boolean	modifiesTableId(org.apache.derby.catalog.UUID tableId)           Does this constant action modify the passed in table uuid? By modify we mean add or drop things tied to this table (e.g.
private  void	modifyColumnConstraint(org.apache.derby.iapi.sql.Activation activation, java.lang.String colName, boolean nullability)           Workhorse for modifying column level constraints.
private  void	modifyColumnDefault(org.apache.derby.iapi.sql.Activation activation, int ix)           Workhorse for modifying the default value of a column.
private  void	modifyColumnType(org.apache.derby.iapi.sql.Activation activation, int ix)
boolean	needsRowLocation()           needsRowLocation returns true iff this the row source expects the drainer of the row source to call rowLocation after getting a row from getNextRowFromRowSource.
boolean	needsToClone()           Does the caller of getNextRowFromRowSource() need to clone the row in order to keep a reference to the row past the getNextRowFromRowSource() call which returned the row.
private  void	objectifyStreamingColumns()
private  void	openBulkFetchScan(long heapConglomNumber)
void	rowLocation(org.apache.derby.iapi.types.RowLocation rl)           rowLocation is a callback for the drainer of the row source to return the rowLocation of the current row, i.e, the row that is being returned by getNextRowFromRowSource.
private  void	setUpAllSorts(org.apache.derby.iapi.sql.execute.ExecRow sourceRow, org.apache.derby.iapi.types.RowLocation rl)           Set up to update all of the indexes on a table when doing a bulk insert on an empty table.
java.lang.String	toString()           Convert this Object to a human-readable String.
private  void	truncateTable(org.apache.derby.iapi.sql.Activation activation)
private  void	updateAllIndexes(long newHeapConglom, org.apache.derby.iapi.sql.dictionary.DataDictionary dd)           Update all of the indexes on a table when doing a bulk insert on an empty table.
private  void	updateIndex(long newHeapConglom, org.apache.derby.iapi.sql.dictionary.DataDictionary dd, int index, long[] newIndexCongloms)
private  void	updateNewAutoincrementColumn(org.apache.derby.iapi.sql.Activation activation, java.lang.String columnName, long initial, long increment)           Update values in a new autoincrement column being added to a table.
private  void	updateNewColumnToDefault(org.apache.derby.iapi.sql.Activation activation, java.lang.String columnName, java.lang.String defaultText, org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)           Update a new column with its default.
private  boolean	validateNotNullConstraint(java.lang.String[] columnNames, boolean[] nullCols, int numRows, org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc, java.lang.String errorMsg)           Make sure that the columns are non null If any column is nullable, check that the data is null.

 

Methods inherited from class org.apache.derby.impl.sql.execute.DDLConstantAction

constructToString, getAndCheckSchemaDescriptor, getSchemaDescriptorForCreate, lockTableForDDL, readExternal, upToDate, writeExternal

 

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

 

Field Detail

sd

protected org.apache.derby.iapi.sql.dictionary.SchemaDescriptor sd

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tableName

protected java.lang.String tableName

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schemaId

protected org.apache.derby.catalog.UUID schemaId

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tableType

protected int tableType

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tableConglomerateId

protected long tableConglomerateId

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columnInfo

protected ColumnInfo[] columnInfo

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constraintActions

protected ConstraintConstantAction[] constraintActions

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lockGranularity

protected char lockGranularity

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compressTable

private boolean compressTable

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sequential

private boolean sequential

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behavior

private int behavior

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doneScan

private boolean doneScan

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needToDropSort

private boolean[] needToDropSort

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validRow

private boolean[] validRow

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bulkFetchSize

private int bulkFetchSize

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currentCompressRow

private int currentCompressRow

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numIndexes

private int numIndexes

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rowCount

private int rowCount

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estimatedRowCount

private long estimatedRowCount

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indexConglomerateNumbers

private long[] indexConglomerateNumbers

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sortIds

private long[] sortIds

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indexedCols

private org.apache.derby.iapi.services.io.FormatableBitSet indexedCols

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compressHeapCC

private org.apache.derby.iapi.store.access.ConglomerateController compressHeapCC

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indexRows

private org.apache.derby.iapi.sql.execute.ExecIndexRow[] indexRows

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baseRow

private org.apache.derby.iapi.sql.execute.ExecRow[] baseRow

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currentRow

private org.apache.derby.iapi.sql.execute.ExecRow currentRow

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compressHeapGSC

private org.apache.derby.iapi.store.access.GroupFetchScanController compressHeapGSC

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compressIRGs

private org.apache.derby.iapi.sql.dictionary.IndexRowGenerator[] compressIRGs

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baseRowArray

private org.apache.derby.iapi.types.DataValueDescriptor[][] baseRowArray

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compressRL

private org.apache.derby.iapi.types.RowLocation[] compressRL

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sorters

private org.apache.derby.iapi.store.access.SortController[] sorters

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columnPosition

private int columnPosition

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ordering

private org.apache.derby.iapi.store.access.ColumnOrdering[][] ordering

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td

private org.apache.derby.iapi.sql.dictionary.TableDescriptor td

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truncateTable

private boolean truncateTable

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lcc

private org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc

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dd

private org.apache.derby.iapi.sql.dictionary.DataDictionary dd

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dm

private org.apache.derby.iapi.sql.depend.DependencyManager dm

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tc

private org.apache.derby.iapi.store.access.TransactionController tc

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activation

private org.apache.derby.iapi.sql.Activation activation

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tableId

protected org.apache.derby.catalog.UUID tableId

Constructor Detail

AlterTableConstantAction

AlterTableConstantAction(org.apache.derby.iapi.sql.dictionary.SchemaDescriptor sd,
                         java.lang.String tableName,
                         org.apache.derby.catalog.UUID tableId,
                         long tableConglomerateId,
                         int tableType,
                         ColumnInfo[] columnInfo,
                         ConstraintConstantAction[] constraintActions,
                         char lockGranularity,
                         boolean compressTable,
                         int behavior,
                         boolean sequential,
                         boolean truncateTable)

Make the AlterAction for an ALTER TABLE statement.

Method Detail

toString

public java.lang.String toString()

Description copied from class: java.lang.Object

Convert this Object to a human-readable String. There are no limits placed on how long this String should be or what it should contain. We suggest you make it as intuitive as possible to be able to place it into System.out.println() 55 and such.

It is typical, but not required, to ensure that this method never completes abruptly with a java.lang.RuntimeException.

This method will be called when performing string concatenation with this object. If the result is null, string concatenation will instead use "null".

The default implementation returns getClass().getName() + "@" + Integer.toHexString(hashCode()).

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executeConstantAction

public void executeConstantAction(org.apache.derby.iapi.sql.Activation activation)
                           throws org.apache.derby.iapi.error.StandardException

This is the guts of the Execution-time logic for ALTER TABLE.

Specified by:

executeConstantAction in interface org.apache.derby.iapi.sql.execute.ConstantAction

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execGuts

public void execGuts(org.apache.derby.iapi.sql.Activation activation)
              throws org.apache.derby.iapi.error.StandardException

Wrapper for this DDL action. Factored out so that our child, RepAlterTableConstantAction could enjoy the benefits of the startWriting() method above.

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addNewColumnToTable

private void addNewColumnToTable(org.apache.derby.iapi.sql.Activation activation,
                                 int ix)
                          throws org.apache.derby.iapi.error.StandardException

Workhorse for adding a new column to a table.

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dropColumnFromTable

private void dropColumnFromTable(org.apache.derby.iapi.sql.Activation activation,
                                 int ix)
                          throws org.apache.derby.iapi.error.StandardException

Workhorse for dropping a column from a table.

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modifyColumnType

private void modifyColumnType(org.apache.derby.iapi.sql.Activation activation,
                              int ix)
                       throws org.apache.derby.iapi.error.StandardException

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modifyColumnConstraint

private void modifyColumnConstraint(org.apache.derby.iapi.sql.Activation activation,
                                    java.lang.String colName,
                                    boolean nullability)
                             throws org.apache.derby.iapi.error.StandardException

Workhorse for modifying column level constraints. Right now it is restricted to modifying a null constraint to a not null constraint.

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modifyColumnDefault

private void modifyColumnDefault(org.apache.derby.iapi.sql.Activation activation,
                                 int ix)
                          throws org.apache.derby.iapi.error.StandardException

Workhorse for modifying the default value of a column.

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compressTable

private void compressTable(org.apache.derby.iapi.sql.Activation activation)
                    throws org.apache.derby.iapi.error.StandardException

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truncateTable

private void truncateTable(org.apache.derby.iapi.sql.Activation activation)
                    throws org.apache.derby.iapi.error.StandardException

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updateAllIndexes

private void updateAllIndexes(long newHeapConglom,
                              org.apache.derby.iapi.sql.dictionary.DataDictionary dd)
                       throws org.apache.derby.iapi.error.StandardException

Update all of the indexes on a table when doing a bulk insert on an empty table.

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updateIndex

private void updateIndex(long newHeapConglom,
                         org.apache.derby.iapi.sql.dictionary.DataDictionary dd,
                         int index,
                         long[] newIndexCongloms)
                  throws org.apache.derby.iapi.error.StandardException

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getAffectedIndexes

private void getAffectedIndexes(org.apache.derby.iapi.sql.Activation activation)
                         throws org.apache.derby.iapi.error.StandardException

Get info on the indexes on the table being compress.

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setUpAllSorts

private void setUpAllSorts(org.apache.derby.iapi.sql.execute.ExecRow sourceRow,
                           org.apache.derby.iapi.types.RowLocation rl)
                    throws org.apache.derby.iapi.error.StandardException

Set up to update all of the indexes on a table when doing a bulk insert on an empty table.

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getValidColumns

public org.apache.derby.iapi.services.io.FormatableBitSet getValidColumns()

Description copied from interface: org.apache.derby.iapi.store.access.RowSource

getValidColumns describes the DataValueDescriptor[] returned by all calls to the getNextRowFromRowSource() call. If getValidColumns returns null, the number of columns is given by the DataValueDescriptor.length where DataValueDescriptor[] is returned by the preceeding getNextRowFromRowSource() call. Column N maps to DataValueDescriptor[N], where column numbers start at zero. If getValidColumns return a non null validColumns FormatableBitSet the number of columns is given by the number of bits set in validColumns. Column N is not in the partial row if validColumns.get(N) returns false. Column N is in the partial row if validColumns.get(N) returns true. If column N is in the partial row then it maps to DataValueDescriptor[M] where M is the count of calls to validColumns.get(i) that return true where i < N. If DataValueDescriptor.length is greater than the number of columns indicated by validColumns the extra entries are ignored.

Specified by:

getValidColumns in interface org.apache.derby.iapi.store.access.RowSource

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getNextRowFromRowSource

public org.apache.derby.iapi.types.DataValueDescriptor[] getNextRowFromRowSource()
                                                                          throws org.apache.derby.iapi.error.StandardException

Description copied from interface: org.apache.derby.iapi.store.access.RowSource

Get the next row as an array of column objects. The column objects can be a JBMS Storable or any Serializable/Externalizable/Formattable/Streaming type.
A return of null indicates that the complete set of rows has been read.

A null column can be specified by leaving the object null, or indicated by returning a non-null getValidColumns. On streaming columns, it can be indicated by returning a non-null get FieldStates.

If RowSource.needToClone() is true then the returned row (the DataValueDescriptor[]) is guaranteed not to be modified by drainer of the RowSource (except that the input stream will be read, of course) and drainer will keep no reference to it before making the subsequent nextRow call. So it is safe to return the same DataValueDescriptor[] in subsequent nextRow calls if that is desirable for performance reasons.

If RowSource.needToClone() is false then the returned row (the DataValueDescriptor[]) may be be modified by drainer of the RowSource, and the drainer may keep a reference to it after making the subsequent nextRow call. In this case the client should severe all references to the row after returning it from getNextRowFromRowSource().

Specified by:

getNextRowFromRowSource in interface org.apache.derby.iapi.store.access.RowSource

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needsToClone

public boolean needsToClone()

Description copied from interface: org.apache.derby.iapi.store.access.RowSource

Does the caller of getNextRowFromRowSource() need to clone the row in order to keep a reference to the row past the getNextRowFromRowSource() call which returned the row. This call must always return the same for all rows in a RowSource (ie. the caller will call this once per scan from a RowSource and assume the behavior is true for all rows in the RowSource).

Specified by:

needsToClone in interface org.apache.derby.iapi.store.access.RowSource

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closeRowSource

public void closeRowSource()

Description copied from interface: org.apache.derby.iapi.store.access.RowSource

closeRowSource tells the RowSource that it will no longer need to return any rows and it can release any resource it may have. Subsequent call to any method on the RowSource will result in undefined behavior. A closed rowSource can be closed again.

Specified by:

closeRowSource in interface org.apache.derby.iapi.store.access.RowSource

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needsRowLocation

public boolean needsRowLocation()

Description copied from interface: org.apache.derby.iapi.store.access.RowLocationRetRowSource

needsRowLocation returns true iff this the row source expects the drainer of the row source to call rowLocation after getting a row from getNextRowFromRowSource.

Specified by:

needsRowLocation in interface org.apache.derby.iapi.store.access.RowLocationRetRowSource

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rowLocation

public void rowLocation(org.apache.derby.iapi.types.RowLocation rl)
                 throws org.apache.derby.iapi.error.StandardException

Description copied from interface: org.apache.derby.iapi.store.access.RowLocationRetRowSource

rowLocation is a callback for the drainer of the row source to return the rowLocation of the current row, i.e, the row that is being returned by getNextRowFromRowSource. This interface is for the purpose of loading a base table with index. In that case, the indices can be built at the same time the base table is laid down once the row location of the base row is known. This is an example pseudo code on how this call is expected to be used:

                boolean needsRL = rowSource.needsRowLocation();
                DataValueDescriptor[] row;
                while((row = rowSource.getNextRowFromRowSource()) != null)
                {
                        RowLocation rl = heapConglomerate.insertRow(row);
                        if (needsRL)
                                rowSource.rowLocation(rl);
                }
                

NeedsRowLocation and rowLocation will ONLY be called by a drainer of the row source which CAN return a row location. Drainer of row source which cannot return rowLocation will guarentee to not call either callbacks. Conversely, if NeedsRowLocation is called and it returns true, then for every row return by getNextRowFromRowSource, a rowLocation callback must also be issued with the row location of the row. Implementor of both the source and the drain of the row source must be aware of this protocol.
The RowLocation object is own by the caller of rowLocation, in other words, the drainer of the RowSource. This is so that we don't need to new a row location for every row. If the Row Source wants to keep the row location, it needs to clone it (RowLocation is a ClonableObject).

Specified by:

rowLocation in interface org.apache.derby.iapi.store.access.RowLocationRetRowSource

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objectifyStreamingColumns

private void objectifyStreamingColumns()
                                throws org.apache.derby.iapi.error.StandardException

---

insertIntoSorter

private void insertIntoSorter(int index,
                              org.apache.derby.iapi.types.RowLocation rl)
                       throws org.apache.derby.iapi.error.StandardException

---

cleanUp

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

---

getSemiRowCount

private int getSemiRowCount(org.apache.derby.iapi.store.access.TransactionController tc)
                     throws org.apache.derby.iapi.error.StandardException

Return the "semi" row count of a table. We are only interested in whether the table has 0, 1 or > 1 rows.

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updateNewColumnToDefault

private void updateNewColumnToDefault(org.apache.derby.iapi.sql.Activation activation,
                                      java.lang.String columnName,
                                      java.lang.String defaultText,
                                      org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc)
                               throws org.apache.derby.iapi.error.StandardException

Update a new column with its default. We could do the scan ourself here, but instead we get a nested connection and issue the appropriate update statement.

---

executeUpdate

private static void executeUpdate(org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc,
                                  java.lang.String updateStmt)
                           throws org.apache.derby.iapi.error.StandardException

---

getColumnMax

private long getColumnMax(org.apache.derby.iapi.sql.Activation activation,
                          org.apache.derby.iapi.sql.dictionary.TableDescriptor td,
                          java.lang.String columnName,
                          long increment,
                          long initial)
                   throws org.apache.derby.iapi.error.StandardException

computes the minimum/maximum value in a column of a table.

---

dropAllColumnDefaults

private void dropAllColumnDefaults(org.apache.derby.catalog.UUID tableId,
                                   org.apache.derby.iapi.sql.dictionary.DataDictionary dd)
                            throws org.apache.derby.iapi.error.StandardException

---

openBulkFetchScan

private void openBulkFetchScan(long heapConglomNumber)
                        throws org.apache.derby.iapi.error.StandardException

---

closeBulkFetchScan

private void closeBulkFetchScan()
                         throws org.apache.derby.iapi.error.StandardException

---

updateNewAutoincrementColumn

private void updateNewAutoincrementColumn(org.apache.derby.iapi.sql.Activation activation,
                                          java.lang.String columnName,
                                          long initial,
                                          long increment)
                                   throws org.apache.derby.iapi.error.StandardException

Update values in a new autoincrement column being added to a table. This is similar to updateNewColumnToDefault whereby we issue an update statement using a nested connection. The UPDATE statement uses a static method in ConnectionInfo (which is not documented) which returns the next value to be inserted into the autoincrement column.

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validateNotNullConstraint

private boolean validateNotNullConstraint(java.lang.String[] columnNames,
                                          boolean[] nullCols,
                                          int numRows,
                                          org.apache.derby.iapi.sql.conn.LanguageConnectionContext lcc,
                                          java.lang.String errorMsg)
                                   throws org.apache.derby.iapi.error.StandardException

Make sure that the columns are non null If any column is nullable, check that the data is null.

---

compressIndexArrays

private java.lang.Object[] compressIndexArrays(long[] indexCIDS,
                                               org.apache.derby.iapi.sql.dictionary.IndexRowGenerator[] irgs)

Get rid of duplicates from a set of index conglomerate numbers and index descriptors.

---

modifiesTableId

public boolean modifiesTableId(org.apache.derby.catalog.UUID tableId)

Does this constant action modify the passed in table uuid? By modify we mean add or drop things tied to this table (e.g. index, trigger, constraint). Things like views or spses that reference this table don't count.

Specified by:

modifiesTableId in interface org.apache.derby.iapi.sql.execute.ConstantAction

Overrides:

modifiesTableId in class DDLConstantAction

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> sql >> [ execute overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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