/**
* Bind this LockTableNode. This means looking up the table, verifying it exists and getting the
* heap conglomerate number.
*
* @exception StandardException Thrown on error
*/
public void bindStatement() throws StandardException {
CompilerContext cc = getCompilerContext();
ConglomerateDescriptor cd;
DataDictionary dd = getDataDictionary();
SchemaDescriptor sd;
String schemaName = tableName.getSchemaName();
sd = getSchemaDescriptor(schemaName);
// Users are not allowed to lock system tables
if (sd.isSystemSchema()) {
throw StandardException.newException(
SQLState.LANG_NO_USER_DDL_IN_SYSTEM_SCHEMA, statementToString(), schemaName);
}
lockTableDescriptor = getTableDescriptor(tableName.getTableName(), sd);
if (lockTableDescriptor == null) {
// Check if the reference is for a synonym.
TableName synonymTab = resolveTableToSynonym(tableName);
if (synonymTab == null)
throw StandardException.newException(SQLState.LANG_TABLE_NOT_FOUND, tableName);
tableName = synonymTab;
sd = getSchemaDescriptor(tableName.getSchemaName());
lockTableDescriptor = getTableDescriptor(synonymTab.getTableName(), sd);
if (lockTableDescriptor == null)
throw StandardException.newException(SQLState.LANG_TABLE_NOT_FOUND, tableName);
}
// throw an exception if user is attempting to lock a temporary table
if (lockTableDescriptor.getTableType() == TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE) {
throw StandardException.newException(
SQLState.LANG_NOT_ALLOWED_FOR_DECLARED_GLOBAL_TEMP_TABLE);
}
conglomerateNumber = lockTableDescriptor.getHeapConglomerateId();
/* Get the base conglomerate descriptor */
cd = lockTableDescriptor.getConglomerateDescriptor(conglomerateNumber);
/* Statement is dependent on the TableDescriptor and ConglomerateDescriptor */
cc.createDependency(lockTableDescriptor);
cc.createDependency(cd);
if (isPrivilegeCollectionRequired()) {
// need SELECT privilege to perform lock table statement.
cc.pushCurrentPrivType(Authorizer.SELECT_PRIV);
cc.addRequiredTablePriv(lockTableDescriptor);
cc.popCurrentPrivType();
}
}
/**
* Return the requested values computed from the next row (if any) for which the restriction
* evaluates to true.
*
* <p>Restriction and projection parameters are evaluated for each row.
*
* @exception StandardException thrown on failure.
* @exception StandardException ResultSetNotOpen thrown if not yet open.
* @return the next row in the result
*/
public ExecRow getNextRowCore() throws StandardException {
if (isXplainOnlyMode()) return null;
ExecRow sourceRow = null;
ExecRow retval = null;
boolean restrict = false;
DataValueDescriptor restrictBoolean;
long beginRT = 0;
beginTime = getCurrentTimeMillis();
if (!isOpen) {
throw StandardException.newException(SQLState.LANG_RESULT_SET_NOT_OPEN, "next");
}
/*
* Loop until we get a row from the source that qualifies, or there are
* no more rows to qualify. For each iteration fetch a row from the
* source, and evaluate against the restriction if any.
*/
ExecRow tmpRow = null;
do {
sourceRow = source.getNextRowCore();
if (sourceRow != null) {
this.rownumber++;
tmpRow = getAllocatedRow();
populateFromSourceRow(sourceRow, tmpRow);
setCurrentRow(tmpRow);
/* Evaluate any restrictions */
restrictBoolean =
(DataValueDescriptor) ((restriction == null) ? null : restriction.invoke(activation));
restrictionTime += getElapsedMillis(beginRT);
// if the result is null, we make it false --
// so the row won't be returned.
restrict =
(restrictBoolean == null)
|| ((!restrictBoolean.isNull()) && restrictBoolean.getBoolean());
if (!restrict) {
rowsFiltered++;
clearCurrentRow();
}
/* Update the run time statistics */
rowsSeen++;
retval = currentRow;
} else {
clearCurrentRow();
retval = null;
}
} while ((sourceRow != null) && (!restrict));
nextTime += getElapsedMillis(beginTime);
return retval;
}
/**
* @see Authorizer#isReadOnlyConnection
* @exception StandardException Thrown if the operation is not allowed
*/
public void setReadOnlyConnection(boolean on, boolean authorize) throws StandardException {
if (authorize && !on) {
if (connectionMustRemainReadOnly())
throw StandardException.newException(SQLState.AUTH_CANNOT_SET_READ_WRITE);
}
readOnlyConnection = on;
}
/**
* Get a BigDecimal representing the value of a DataValueDescriptor
*
* @param value Non-null value to be converted
* @return BigDecimal value
* @throws StandardException Invalid conversion or out of range.
*/
public static BigDecimal getBigDecimal(DataValueDescriptor value) throws StandardException {
if (SanityManager.DEBUG) {
if (value.isNull())
SanityManager.THROWASSERT("NULL value passed to SQLDecimal.getBigDecimal");
}
switch (value.typeToBigDecimal()) {
case Types.DECIMAL:
return (BigDecimal) value.getObject();
case Types.CHAR:
try {
return new BigDecimal(value.getString().trim());
} catch (NumberFormatException nfe) {
throw StandardException.newException(
SQLState.LANG_FORMAT_EXCEPTION, "java.math.BigDecimal");
}
case Types.BIGINT:
return BigDecimal.valueOf(value.getLong());
default:
if (SanityManager.DEBUG)
SanityManager.THROWASSERT(
"invalid return from "
+ value.getClass()
+ ".typeToBigDecimal() "
+ value.typeToBigDecimal());
return null;
}
}
/**
* read the page from disk into this CachedPage object.
*
* <p>A page is read in from disk into the pageData array of this object, and then put in the
* cache.
*
* <p>
*
* @param myContainer the container to read the page from.
* @param newIdentity indentity (ie. page number) of the page to read
* @exception StandardException Standard exception policy.
*/
private void readPage(FileContainer myContainer, PageKey newIdentity) throws StandardException {
int pagesize = myContainer.getPageSize();
// we will reuse the existing page array if it is same size, the
// cache does support caching various sized pages.
setPageArray(pagesize);
for (int io_retry_count = 0; ; ) {
try {
myContainer.readPage(newIdentity.getPageNumber(), pageData);
break;
} catch (IOException ioe) {
io_retry_count++;
// Retrying read I/O's has been found to be successful sometimes
// in completing the read without having to fail the calling
// query, and in some cases avoiding complete db shutdown.
// Some situations are:
// spurious interrupts being sent to thread by clients.
// unreliable hardware like a network mounted file system.
//
// The only option other than retrying is to fail the I/O
// immediately and throwing an error, thus performance cost
// not really a consideration.
//
// The retry max of 4 is arbitrary, but has been enough that
// not many read I/O errors have been reported.
if (io_retry_count > 4) {
// page cannot be physically read
StandardException se =
StandardException.newException(
SQLState.FILE_READ_PAGE_EXCEPTION, ioe, newIdentity, new Integer(pagesize));
if (dataFactory.getLogFactory().inRFR()) {
// if in rollforward recovery, it is possible that this
// page actually does not exist on the disk yet because
// the log record we are proccessing now is actually
// creating the page, we will recreate the page if we
// are in rollforward recovery, so just throw the
// exception.
throw se;
} else {
if (SanityManager.DEBUG) {
// by shutting down system in debug mode, maybe
// we can catch root cause of the interrupt.
throw dataFactory.markCorrupt(se);
} else {
// No need to shut down runtime database on read
// error in delivered system, throwing exception
// should be enough. Thrown exception has nested
// IO exception which is root cause of error.
throw se;
}
}
}
}
}
}
/**
* @see Authorizer#refresh
* @exception StandardException Thrown if the operation is not allowed
*/
public void refresh() throws StandardException {
getUserAccessLevel();
if (!readOnlyConnection) readOnlyConnection = connectionMustRemainReadOnly();
// Is a connection allowed.
if (userAccessLevel == NO_ACCESS)
throw StandardException.newException(SQLState.AUTH_DATABASE_CONNECTION_REFUSED);
}
/**
* @see TypeCompiler#resolveArithmeticOperation
* @exception StandardException Thrown on error
*/
public DataTypeDescriptor resolveArithmeticOperation(
DataTypeDescriptor leftType, DataTypeDescriptor rightType, String operator)
throws StandardException {
throw StandardException.newException(
SQLState.LANG_BINARY_OPERATOR_NOT_SUPPORTED,
operator,
leftType.getTypeId().getSQLTypeName(),
rightType.getTypeId().getSQLTypeName());
}
/**
* Open a b-tree compress scan.
*
* <p>B2I does not support a compress scan.
*
* <p>
*
* @see Conglomerate#defragmentConglomerate
* @exception StandardException Standard exception policy.
*/
public ScanManager defragmentConglomerate(
TransactionManager xact_manager,
Transaction rawtran,
boolean hold,
int open_mode,
int lock_level,
LockingPolicy locking_policy,
int isolation_level)
throws StandardException {
throw StandardException.newException(SQLState.BTREE_UNIMPLEMENTED_FEATURE);
}
/**
* Bind this expression. This means binding the sub-expressions, as well as figuring out what the
* return type is for this expression.
*
* @param fromList The FROM list for the query this expression is in, for binding columns.
* @param subqueryList The subquery list being built as we find SubqueryNodes
* @param aggregateVector The aggregate vector being built as we find AggregateNodes
* @return The new top of the expression tree.
* @exception StandardException Thrown on error
*/
public ValueNode bindExpression(
FromList fromList, SubqueryList subqueryList, List aggregateVector) throws StandardException {
// method invocations are not allowed in ADD TABLE clauses.
// And neither are field references.
javaNode.checkReliability(this);
/* Bind the expression under us */
javaNode = javaNode.bindExpression(fromList, subqueryList, aggregateVector);
if (javaNode instanceof StaticMethodCallNode) {
AggregateNode agg = ((StaticMethodCallNode) javaNode).getResolvedAggregate();
if (agg != null) {
return agg.bindExpression(fromList, subqueryList, aggregateVector);
}
}
DataTypeDescriptor dts = javaNode.getDataType();
if (dts == null) {
throw StandardException.newException(
SQLState.LANG_NO_CORRESPONDING_S_Q_L_TYPE, javaNode.getJavaTypeName());
}
TypeDescriptor catalogType = dts.getCatalogType();
if (catalogType.isRowMultiSet() || (catalogType.getTypeName().equals("java.sql.ResultSet"))) {
throw StandardException.newException(SQLState.LANG_TABLE_FUNCTION_NOT_ALLOWED);
}
setType(dts);
// For functions returning string types we should set the collation to match the
// java method's schema DERBY-2972. This is propogated from
// RoutineAliasInfo to javaNode.
if (dts.getTypeId().isStringTypeId()) {
this.setCollationInfo(
javaNode.getCollationType(), StringDataValue.COLLATION_DERIVATION_IMPLICIT);
}
return this;
}
public RowLocation newRowLocationTemplate() throws StandardException {
if (open_conglom.isClosed()) {
if (open_conglom.getHold()) {
open_conglom.reopen();
} else {
throw (StandardException.newException(
SQLState.HEAP_IS_CLOSED, open_conglom.getConglomerate().getId()));
}
}
return new HeapRowLocation();
}
/** @exception StandardException thrown on failure to convert */
public int getInt() throws StandardException {
if (isNull()) return 0;
try {
long lv = getLong();
if ((lv >= Integer.MIN_VALUE) && (lv <= Integer.MAX_VALUE)) return (int) lv;
} catch (StandardException se) {
}
throw StandardException.newException(SQLState.LANG_OUTSIDE_RANGE_FOR_DATATYPE, "INTEGER");
}
/** @exception StandardException thrown on failure to convert */
public short getShort() throws StandardException {
if (isNull()) return (short) 0;
try {
long lv = getLong();
if ((lv >= Short.MIN_VALUE) && (lv <= Short.MAX_VALUE)) return (short) lv;
} catch (StandardException se) {
}
throw StandardException.newException(SQLState.LANG_OUTSIDE_RANGE_FOR_DATATYPE, "SMALLINT");
}
/**
* Set the precision/scale of the to the desired values. Used when CASTing. Ideally we'd recycle
* normalize(), but the use is different.
*
* @param desiredPrecision the desired precision -- IGNORE_PREICISION if it is to be ignored.
* @param desiredScale the desired scale
* @param errorOnTrunc throw error on truncation (ignored -- always thrown if we truncate the
* non-decimal part of the value)
* @exception StandardException Thrown on non-zero truncation if errorOnTrunc is true
*/
public void setWidth(int desiredPrecision, int desiredScale, boolean errorOnTrunc)
throws StandardException {
if (isNull()) return;
if (desiredPrecision != IGNORE_PRECISION
&& ((desiredPrecision - desiredScale) < SQLDecimal.getWholeDigits(getBigDecimal()))) {
throw StandardException.newException(
SQLState.LANG_OUTSIDE_RANGE_FOR_DATATYPE,
("DECIMAL/NUMERIC(" + desiredPrecision + "," + desiredScale + ")"));
}
value = value.setScale(desiredScale, BigDecimal.ROUND_DOWN);
rawData = null;
}
/** @exception StandardException thrown on failure to convert */
public byte getByte() throws StandardException {
if (isNull()) return (byte) 0;
try {
long lv = getLong();
if ((lv >= Byte.MIN_VALUE) && (lv <= Byte.MAX_VALUE)) return (byte) lv;
} catch (StandardException se) {
}
throw StandardException.newException(SQLState.LANG_OUTSIDE_RANGE_FOR_DATATYPE, "TINYINT");
}
/**
* This is the guts of the Execution-time logic for DROP ROLE.
*
* @see org.apache.derby.iapi.sql.execute.ConstantAction#executeConstantAction
*/
public void executeConstantAction(Activation activation) throws StandardException {
LanguageConnectionContext lcc = activation.getLanguageConnectionContext();
DataDictionary dd = lcc.getDataDictionary();
TransactionController tc = lcc.getTransactionExecute();
/*
** Inform the data dictionary that we are about to write to it.
** There are several calls to data dictionary "get" methods here
** that might be done in "read" mode in the data dictionary, but
** it seemed safer to do this whole operation in "write" mode.
**
** We tell the data dictionary we're done writing at the end of
** the transaction.
*/
dd.startWriting(lcc);
RoleGrantDescriptor rdDef = dd.getRoleDefinitionDescriptor(roleName);
if (rdDef == null) {
throw StandardException.newException(SQLState.ROLE_INVALID_SPECIFICATION, roleName);
}
// When a role is dropped, for every role in its grantee closure, we
// call the REVOKE_ROLE action. It is used to invalidate dependent
// objects (constraints, triggers and views). Note that until
// DERBY-1632 is fixed, we risk dropping objects not really dependent
// on this role, but one some other role just because it inherits from
// this one. See also RevokeRoleConstantAction.
RoleClosureIterator rci =
dd.createRoleClosureIterator(activation.getTransactionController(), roleName, false);
String role;
while ((role = rci.next()) != null) {
RoleGrantDescriptor r = dd.getRoleDefinitionDescriptor(role);
dd.getDependencyManager().invalidateFor(r, DependencyManager.REVOKE_ROLE, lcc);
}
rdDef.drop(lcc);
/*
* We dropped a role, now drop all dependents:
* - role grants to this role
* - grants of this role to other roles or users
* - privilege grants to this role
*/
dd.dropRoleGrantsByGrantee(roleName, tc);
dd.dropRoleGrantsByName(roleName, tc);
dd.dropAllPermsByGrantee(roleName, tc);
}
/**
* ************************************************************************ Public Methods of This
* class: *************************************************************************
*/
public int insert(DataValueDescriptor[] row) throws StandardException {
if (open_conglom.isClosed()) {
if (open_conglom.getHold()) {
open_conglom.reopen();
} else {
throw (StandardException.newException(
SQLState.HEAP_IS_CLOSED, open_conglom.getConglomerate().getId()));
}
}
doInsert(row);
return (0);
}
/**
* If no schema name specified for global temporary table, SESSION is the implicit schema.
* Otherwise, make sure the specified schema name for global temporary table is SESSION.
*
* @param objectName The name of the new object being declared (ie temporary table)
*/
private Object tempTableSchemaNameCheck(Object objectName) throws StandardException {
TableName tempTableName = (TableName) objectName;
if (tempTableName != null) {
if (tempTableName.getSchemaName() == null)
tempTableName.setSchemaName(
SchemaDescriptor
.STD_DECLARED_GLOBAL_TEMPORARY_TABLES_SCHEMA_NAME); // If no schema specified,
// SESSION is the implicit
// schema.
else if (!(isSessionSchema(tempTableName.getSchemaName())))
throw StandardException.newException(
SQLState.LANG_DECLARED_GLOBAL_TEMP_TABLE_ONLY_IN_SESSION_SCHEMA);
}
return (tempTableName);
}
/**
* Set the width of the to the desired value. Used when CASTing. Ideally we'd recycle normalize(),
* but the behavior is different (we issue a warning instead of an error, and we aren't interested
* in nullability).
*
* @param desiredWidth the desired length
* @param desiredScale the desired scale (ignored)
* @param errorOnTrunc throw error on truncation
* @exception StandardException Thrown on non-zero truncation if errorOnTrunc is true
*/
public void setWidth(
int desiredWidth,
int desiredScale, // Ignored
boolean errorOnTrunc)
throws StandardException {
/*
** If the input is NULL, nothing to do.
*/
if (getValue() == null) {
return;
}
int sourceWidth = dataValue.length;
/*
** If the input is shorter than the desired type,
** then pad with blanks to the right length.
*/
if (sourceWidth < desiredWidth) {
byte[] actualData = new byte[desiredWidth];
System.arraycopy(dataValue, 0, actualData, 0, dataValue.length);
java.util.Arrays.fill(actualData, dataValue.length, actualData.length, SQLBinary.PAD);
dataValue = actualData;
}
/*
** Truncation?
*/
else if (sourceWidth > desiredWidth) {
if (errorOnTrunc) {
// error if truncating non pad characters.
for (int i = desiredWidth; i < dataValue.length; i++) {
if (dataValue[i] != SQLBinary.PAD)
throw StandardException.newException(
SQLState.LANG_STRING_TRUNCATION,
getTypeName(),
StringUtil.formatForPrint(this.toString()),
String.valueOf(desiredWidth));
}
}
/*
** Truncate to the desired width.
*/
truncate(sourceWidth, desiredWidth, !errorOnTrunc);
}
}
public void insertAndFetchLocation(DataValueDescriptor[] row, RowLocation templateRowLocation)
throws StandardException {
if (open_conglom.isClosed()) {
if (open_conglom.getHold()) {
open_conglom.reopen();
} else {
throw (StandardException.newException(
SQLState.HEAP_IS_CLOSED, open_conglom.getConglomerate().getId()));
}
}
RecordHandle rh = doInsert(row);
if (SanityManager.DEBUG) {
SanityManager.ASSERT(templateRowLocation instanceof HeapRowLocation);
}
HeapRowLocation hrl = (HeapRowLocation) templateRowLocation;
hrl.setFrom(rh);
}
/**
* Prepare to mark the dependent as invalid (due to at least one of its dependencies being
* invalid).
*
* @param action The action causing the invalidation
* @param p the provider
* @param lcc the language connection context
* @exception StandardException thrown if unable to make it invalid
*/
public void prepareToInvalidate(Provider p, int action, LanguageConnectionContext lcc)
throws StandardException {
switch (action) {
/*
** We are only dependent on the underlying table, and our spses and
** privileges on various objects. (we should be dropped before our
** table is dropped. Also, we should be dropped before revoke
** RESTRICT privilege is issued otherwise revoke RESTRICT will
** throw an exception).
** Currently, in Derby, an execute routine privilege can be revoked
** only if there are no dependents on that privilege. When revoke
** execute RESTRICT is exectued, all the dependents will receive
** REVOKE_PRIVILEGE_RESTRICT and they should throw exception.
** We handle this for TriggerDescriptor by throwning an exception
** below. For all the other types of revoke privileges, for
** instance, SELECT, UPDATE, DELETE, INSERT, REFERENCES,
** TRIGGER, we don't do anything here and later in makeInvalid, we
** make the TriggerDescriptor drop itself.
*/
case DependencyManager.DROP_TABLE:
case DependencyManager.DROP_SYNONYM:
case DependencyManager.DROP_SPS:
case DependencyManager.RENAME:
case DependencyManager.REVOKE_PRIVILEGE_RESTRICT:
DependencyManager dm = getDataDictionary().getDependencyManager();
throw StandardException.newException(
SQLState.LANG_PROVIDER_HAS_DEPENDENT_OBJECT,
dm.getActionString(action),
p.getObjectName(),
"TRIGGER",
name);
/*
** The trigger descriptor depends on the trigger table.
** This means that we get called whenever anything happens
** to the trigger table. There are so many cases where this
** can happen that it doesn't make sense to have an assertion
** here to check whether the action was expected (it makes
** the code hard to maintain, and creates a big switch statement).
*/
default:
break;
}
}
public UpdateFieldOperation(
RawTransaction t,
BasePage page,
int slot,
int recordId,
int fieldId,
Object column,
LogicalUndo undo)
throws StandardException {
super(page, undo, recordId);
this.doMeSlot = slot;
this.fieldId = fieldId;
try {
writeOptionalDataToBuffer(t, column);
} catch (IOException ioe) {
throw StandardException.newException(SQLState.DATA_UNEXPECTED_EXCEPTION, ioe);
}
}
/**
* Convert this page to requested type, as defined by input format id.
*
* <p>The current cache entry is a different format id than the requested type, change it. This
* object is instantiated to the wrong subtype of cachedPage, this routine will create an object
* with the correct subtype, and transfer all pertinent information from this to the new correct
* object.
*
* <p>
*
* @return The new object created with the input fid and transfered info.
* @param fid The format id of the new page.
* @param newIdentity The key of the new page.
* @exception StandardException Standard exception policy.
*/
private CachedPage changeInstanceTo(int fid, PageKey newIdentity) throws StandardException {
CachedPage realPage;
try {
realPage = (CachedPage) Monitor.newInstanceFromIdentifier(fid);
} catch (StandardException se) {
if (se.getSeverity() > ExceptionSeverity.STATEMENT_SEVERITY) {
throw se;
} else {
throw StandardException.newException(
SQLState.DATA_UNKNOWN_PAGE_FORMAT_2,
newIdentity,
org.apache.derby.iapi.util.StringUtil.hexDump(pageData));
}
}
realPage.setFactory(dataFactory);
// avoid creating the data buffer if possible, transfer it to the new
// page if this is the first time the page buffer is used, then
// createPage will create the page array with the correct page size
if (this.pageData != null) {
realPage.alreadyReadPage = true;
realPage.usePageBuffer(this.pageData);
}
// RESOLVE (12/15/06) - the following code is commented out, but
// not sure why.
// this page should not be used any more, null out all its content and
// wait for GC to clean it up
// destroyPage();// let this subtype have a chance to get rid of stuff
// this.pageData = null; // this instance no longer own the data array
// this.pageCache = null;
// this.dataFactory = null;
// this.containerCache = null;
return realPage;
}
private static StandardException externalRoutineException(int operation, int sqlAllowed) {
String sqlState;
if (sqlAllowed == RoutineAliasInfo.READS_SQL_DATA)
sqlState = SQLState.EXTERNAL_ROUTINE_NO_MODIFIES_SQL;
else if (sqlAllowed == RoutineAliasInfo.CONTAINS_SQL) {
switch (operation) {
case Authorizer.SQL_WRITE_OP:
case Authorizer.PROPERTY_WRITE_OP:
case Authorizer.JAR_WRITE_OP:
case Authorizer.SQL_DDL_OP:
sqlState = SQLState.EXTERNAL_ROUTINE_NO_MODIFIES_SQL;
break;
default:
sqlState = SQLState.EXTERNAL_ROUTINE_NO_READS_SQL;
break;
}
} else sqlState = SQLState.EXTERNAL_ROUTINE_NO_SQL;
return StandardException.newException(sqlState);
}
public Object newInstance(Context context) throws StandardException {
Throwable t;
try {
GeneratedByteCode ni = (GeneratedByteCode) ci.getNewInstance();
ni.initFromContext(context);
ni.setGC(this);
ni.postConstructor();
return ni;
} catch (InstantiationException ie) {
t = ie;
} catch (IllegalAccessException iae) {
t = iae;
} catch (java.lang.reflect.InvocationTargetException ite) {
t = ite;
} catch (LinkageError le) {
t = le;
}
throw StandardException.newException(SQLState.GENERATED_CLASS_INSTANCE_ERROR, t, getName());
}
/**
* Notify all listeners that a commit is about to occur. If a listener throws an exception then no
* further listeners will be notified and a StandardException with rollback severity will be
* thrown.
*
* @throws StandardException
*/
public void preCommitNotify() throws StandardException {
if (listeners.isEmpty()) return;
for (Iterator i = listeners.iterator(); i.hasNext(); ) {
TransactionListener listener = (TransactionListener) i.next();
try {
if (listener.preCommit()) i.remove();
} catch (StandardException se) {
// This catches any exceptions that have Transaction severity
// or less (e.g. Statement exception).
// If we received any lesser
// error then we abort the transaction anyway.
if (se.getSeverity() < ExceptionSeverity.TRANSACTION_SEVERITY) {
throw StandardException.newException(SQLState.XACT_COMMIT_EXCEPTION, se);
}
throw se;
}
}
}
/** @exception StandardException thrown on failure to convert */
public long getLong() throws StandardException {
BigDecimal localValue = getBigDecimal();
if (localValue == null) return (long) 0;
// Valid range for long is
// greater than Long.MIN_VALUE - 1
// *and*
// less than Long.MAX_VALUE + 1
//
// This ensures that DECIMAL values with an integral value
// equal to the Long.MIN/MAX_VALUE round correctly to those values.
// e.g. 9223372036854775807.1 converts to 9223372036854775807
// this matches DB2 UDB behaviour
if ((localValue.compareTo(MINLONG_MINUS_ONE) == 1)
&& (localValue.compareTo(MAXLONG_PLUS_ONE) == -1)) {
return localValue.longValue();
}
throw StandardException.newException(SQLState.LANG_OUTSIDE_RANGE_FOR_DATATYPE, "BIGINT");
}
/**
* Does this trigger need to fire on this type of DML?
*
* @param stmtType the type of DML
* (StatementType.INSERT|StatementType.UPDATE|StatementType.DELETE)
* @param modifiedCols the columns modified, or null for all
* @return true/false
* @exception StandardException on error
*/
public boolean needsToFire(int stmtType, int[] modifiedCols) throws StandardException {
if (SanityManager.DEBUG) {
if (!((stmtType == StatementType.INSERT)
|| (stmtType == StatementType.BULK_INSERT_REPLACE)
|| (stmtType == StatementType.UPDATE)
|| (stmtType == StatementType.DELETE))) {
SanityManager.THROWASSERT("invalid statement type " + stmtType);
}
}
/*
** If we are disabled, we never fire
*/
if (!isEnabled) {
return false;
}
if (stmtType == StatementType.INSERT) {
return (eventMask & TRIGGER_EVENT_INSERT) == eventMask;
}
if (stmtType == StatementType.DELETE) {
return (eventMask & TRIGGER_EVENT_DELETE) == eventMask;
}
// this is a temporary restriction, but it may not be lifted
// anytime soon.
if (stmtType == StatementType.BULK_INSERT_REPLACE) {
throw StandardException.newException(
SQLState.LANG_NO_BULK_INSERT_REPLACE_WITH_TRIGGER,
getTableDescriptor().getQualifiedName(),
name);
}
// if update, only relevant if columns intersect
return ((eventMask & TRIGGER_EVENT_UPDATE) == eventMask)
&& ConstraintDescriptor.doColumnsIntersect(modifiedCols, referencedCols);
}
/**
* This method implements the / operator for BigDecimal/BigDecimal
*
* @param dividend The numerator
* @param divisor The denominator
* @param result The result of a previous call to this method, null if not called yet
* @param scale The result scale, if < 0, calculate the scale according to the actual values'
* sizes
* @return A SQLDecimal containing the result of the division
* @exception StandardException Thrown on error
*/
public NumberDataValue divide(
NumberDataValue dividend, NumberDataValue divisor, NumberDataValue result, int scale)
throws StandardException {
if (result == null) {
result = new SQLDecimal();
}
if (dividend.isNull() || divisor.isNull()) {
result.setToNull();
return result;
}
BigDecimal divisorBigDecimal = SQLDecimal.getBigDecimal(divisor);
if (divisorBigDecimal.compareTo(ZERO) == 0) {
throw StandardException.newException(SQLState.LANG_DIVIDE_BY_ZERO);
}
BigDecimal dividendBigDecimal = SQLDecimal.getBigDecimal(dividend);
/*
** Set the result scale to be either the passed in scale, whcih was
** calculated at bind time to be max(ls+rp-rs+1, 4), where ls,rp,rs
** are static data types' sizes, which are predictable and stable
** (for the whole result set column, eg.); otherwise dynamically
** calculates the scale according to actual values. Beetle 3901
*/
result.setBigDecimal(
dividendBigDecimal.divide(
divisorBigDecimal,
scale > -1
? scale
: Math.max(
(dividendBigDecimal.scale() + SQLDecimal.getWholeDigits(divisorBigDecimal) + 1),
NumberDataValue.MIN_DECIMAL_DIVIDE_SCALE),
BigDecimal.ROUND_DOWN));
return result;
}
/**
* write the page from this CachedPage object to disk.
*
* <p>
*
* @param identity indentity (ie. page number) of the page to read
* @param syncMe does the write of this single page have to be sync'd?
* @exception StandardException Standard exception policy.
*/
private void writePage(PageKey identity, boolean syncMe) throws StandardException {
// make subclass write the page format
writeFormatId(identity);
// let subclass have a chance to write any cached data to page data
// array
writePage(identity);
// force WAL - and check to see if database is corrupt or is frozen.
// last log Instant may be null if the page is being forced
// to disk on a createPage (which violates the WAL protocol actually).
// See FileContainer.newPage
LogInstant flushLogTo = getLastLogInstant();
dataFactory.flush(flushLogTo);
if (flushLogTo != null) {
clearLastLogInstant();
}
// find the container and file access object
FileContainer myContainer = (FileContainer) containerCache.find(identity.getContainerId());
if (myContainer == null) {
StandardException nested =
StandardException.newException(
SQLState.DATA_CONTAINER_VANISHED, identity.getContainerId());
throw dataFactory.markCorrupt(
StandardException.newException(SQLState.FILE_WRITE_PAGE_EXCEPTION, nested, identity));
}
try {
myContainer.writePage(identity.getPageNumber(), pageData, syncMe);
//
// Do some in memory unlogged bookkeeping tasks while we have
// the container.
//
if (!isOverflowPage() && isDirty()) {
// let the container knows whether this page is a not
// filled, non-overflow page
myContainer.trackUnfilledPage(identity.getPageNumber(), unfilled());
// if this is not an overflow page, see if the page's row
// count has changed since it come into the cache.
//
// if the page is not invalid, row count is 0. Otherwise,
// count non-deleted records on page.
//
// Cannot call nonDeletedRecordCount because the page is
// unlatched now even though nobody is changing it
int currentRowCount = internalNonDeletedRecordCount();
if (currentRowCount != initialRowCount) {
myContainer.updateEstimatedRowCount(currentRowCount - initialRowCount);
setContainerRowCount(myContainer.getEstimatedRowCount(0));
initialRowCount = currentRowCount;
}
}
} catch (IOException ioe) {
// page cannot be written
throw StandardException.newException(SQLState.FILE_WRITE_PAGE_EXCEPTION, ioe, identity);
} finally {
containerCache.release(myContainer);
myContainer = null;
}
synchronized (this) {
// change page state to not dirty after the successful write
isDirty = false;
preDirty = false;
}
}
/**
* Find the container and then create the page in that container.
*
* <p>This is the process of creating a new page in a container, in that case no need to read the
* page from disk - just need to initialize it in the cache.
*
* <p>
*
* @return new page, higher levels have already checked the page number is valid for an open.
* @param key Which page is this?
* @param createParameter details needed to create page like size, format id, ...
* @exception StandardException Standard exception policy.
* @see Cacheable#createIdentity
*/
public Cacheable createIdentity(Object key, Object createParameter) throws StandardException {
if (SanityManager.DEBUG) {
SanityManager.ASSERT(key instanceof PageKey);
}
initialize();
PageKey newIdentity = (PageKey) key;
PageCreationArgs createArgs = (PageCreationArgs) createParameter;
int formatId = createArgs.formatId;
if (formatId == -1) {
throw StandardException.newException(
SQLState.DATA_UNKNOWN_PAGE_FORMAT_2,
newIdentity,
org.apache.derby.iapi.util.StringUtil.hexDump(pageData));
}
// createArgs[0] contains the integer form of the formatId
// if it is not the same as this instance's formatId, instantiate the
// real page object
if (formatId != getTypeFormatId()) {
return (changeInstanceTo(formatId, newIdentity).createIdentity(key, createParameter));
}
// this is the correct page instance
initializeHeaders(5);
createPage(newIdentity, createArgs);
fillInIdentity(newIdentity);
initialRowCount = 0;
/*
* if we need to grow the container and the page has not been
* preallocated, writing page before the log is written so that we
* know if there is an IO error - like running out of disk space - then
* we don't write out the log record, because if we do, it may fail
* after the log goes to disk and then the database may not be
* recoverable.
*
* WRITE_SYNC is used when we create the page without first
* preallocating it
* WRITE_NO_SYNC is used when we are preallocating the page - there
* will be a SYNC call after all the pages are preallocated
* 0 means creating a page that has already been preallocated.
*/
int syncFlag = createArgs.syncFlag;
if ((syncFlag & WRITE_SYNC) != 0 || (syncFlag & WRITE_NO_SYNC) != 0)
writePage(newIdentity, (syncFlag & WRITE_SYNC) != 0);
if (SanityManager.DEBUG) {
if (SanityManager.DEBUG_ON(FileContainer.SPACE_TRACE)) {
String sync =
((syncFlag & WRITE_SYNC) != 0)
? "Write_Sync"
: (((syncFlag & WRITE_NO_SYNC) != 0) ? "Write_NO_Sync" : "No_write");
SanityManager.DEBUG(
FileContainer.SPACE_TRACE, "creating new page " + newIdentity + " with " + sync);
}
}
return this;
}
