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Java Source Code / Java Documentation » Database DBMS » db derby 10.2 » org.apache.derby.impl.sql.conn

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Class Diagram

Java Document (Java Doc)

java.lang .Object

org.apache.derby.iapi.services.context .ContextImpl

org.apache.derby.impl.sql.conn .GenericLanguageConnectionContext

GenericLanguageConnectionContext
public class GenericLanguageConnectionContext extends ContextImpl implements LanguageConnectionContext(Code)
	LanguageConnectionContext keeps the pool of prepared statements, activations, and cursors in use by the current connection. The generic impl does not provide statement caching. author: ames

Field Summary
protected AccessFactory	af
protected Authorizer	authorizer
protected int	bindCount
protected TransactionController	childTransaction If non-null indicates that a nested user transaction is in progress.
protected LanguageConnectionFactory	connFactory
protected DataValueFactory	dataFactory
protected int	isolationLevel
protected LanguageFactory	langFactory
protected long	nextCursorId
protected int	nextSavepointId
protected OptimizerFactory	of
protected int	outermostTrigger
protected int	prepareIsolationLevel
protected int	queryNestingDepth queryNestingDepth is a counter used to keep track of how many calls have been made to begin nested transactions.
protected SchemaDescriptor	sd
public CacheManager	statementCache
protected TypeCompilerFactory	tcf
protected TransactionController	tran The transaction to use within this language connection context.
protected String	userName

Constructor Summary
public	GenericLanguageConnectionContext(ContextManager cm, TransactionController tranCtrl, LanguageFactory lf, LanguageConnectionFactory lcf, Database db, String userName, int instanceNumber, String drdaID, String dbname)

Method Summary
public void	addActivation(Activation a) Add the activation to those known about by this connection.
public void	addDeclaredGlobalTempTable(TableDescriptor td)
public boolean	anyoneBlocked()
public StringBuffer	appendErrorInfo()
public void	appendOptimizerTraceOutput(String output)
public void	autoincrementCreateCounter(String s, String t, String c, Long initialValue, long increment, int position)
public void	autoincrementFlushCache(UUID tableUUID) Flush the cache of autoincrement values being kept by the lcc.
public void	beginNestedTransaction(boolean readOnly) Start a Nested User Transaction (NUT) with the store.
public boolean	checkIfAnyDeclaredGlobalTempTablesForThisConnection()
public void	cleanupOnError(Throwable error) If worse than a transaction error, everything goes; we rely on other contexts to kill the context manager for this session. If a transaction error, act like we saw a rollback. If more severe or a java error, the outer cleanup will shutdown the connection, so we don't have to clean up. REMIND: connection should throw out all contexts and start over when the connection is closed...
public void	commitNestedTransaction()
public String	convertIdentifierCase(String id) Convert an identifier to the proper case for this connection.
public void	copyHashtableToAIHT(Hashtable from) Copies an existing hashtable of autoincrement mappings into autoincrementHT, the cache of autoincrement values kept in the languageconnectioncontext.
final public boolean	dataDictionaryInWriteMode()
public int	decrementBindCount()
protected void	doCommit(boolean commitStore, boolean sync, int commitflag, boolean requestedByUser) This is where the work on internalCommit(), userCOmmit() and internalCommitNoSync() actually takes place. When a commit happens, the language connection context will close all open activations/cursors and commit the Store transaction. REVISIT: we talked about having a LanguageTransactionContext, but since store transaction management is currently in flux and our context might want to delegate to that context, for now all commit/rollback actions are handled directly by the language connection context. REVISIT: this may need additional alterations when RELEASE SAVEPOINT/ROLLBACK TO SAVEPOINT show up. Since the access manager's own context takes care of its own resources on commit, and the transaction stays open, there is nothing that this context has to do with the transaction controller. Also, tell the data dictionary that the transaction is finished, if necessary (that is, if the data dictionary was put into DDL mode in this transaction. Parameters: commitStore - true if we should commit the Store transaction Parameters: sync - true means do a synchronized commit,false means do an unsynchronized commit Parameters: commitflag - if this is an unsynchronized commit, the flags topass to commitNoSync in the store'sTransactionController.
public boolean	dropDeclaredGlobalTempTable(String tableName)
public void	emptyCache() Empty as much of the cache as possible.
public AccessFactory	getAccessFactory()
public int	getActivationCount() Return the number of activations known for this connection.
public String	getAuthorizationId()
public Authorizer	getAuthorizer()
public boolean	getAutoincrementUpdate()
public int	getBindCount()
public int	getCacheSize()
public int	getCurrentIsolationLevel()
public String	getCurrentIsolationLevelStr()
public String	getCurrentSchemaName()
public DataDictionary	getDataDictionary()
public DataValueFactory	getDataValueFactory() Get the data value factory to use with this language connection context.
public Database	getDatabase()
public String	getDbname()
public String	getDeclaredGlobalTemporaryTablesSchemaName() Get the declared global temporary tables schema name.
public SchemaDescriptor	getDefaultSchema()
public String	getDrdaID()
public ExecutionContext	getExecutionContext()
public int	getIdentifierCasing() Get casing for delimited identifiers.
public Long	getIdentityValue() Get the identity column value most recently generated.
public int	getInstanceNumber()
public LanguageConnectionFactory	getLanguageConnectionFactory() Get the language connection factory to use with this language connection context.
public LanguageFactory	getLanguageFactory() Get the language factory to use with this language connection context.
public Activation	getLastActivation()
public int	getLockEscalationThreshold() get the lock escalation threshold.
public Object	getLockObject(int lockScope) Get the lock handle for the current transaction.
public boolean	getLogQueryPlan()
public boolean	getLogStatementText()
public OptimizerFactory	getOptimizerFactory()
public boolean	getOptimizerTrace()
public boolean	getOptimizerTraceHtml()
public String	getOptimizerTraceOutput()
public int	getPrepareIsolationLevel()
public boolean	getRunTimeStatisticsMode()
public RunTimeStatistics	getRunTimeStatisticsObject()
public StatementContext	getStatementContext()
public int	getStatementDepth() Reports how many statement levels deep we are.
public boolean	getStatisticsTiming()
public String	getSysIBMSchemaName() Get the name of the SYSIBM schema.
public String	getSystemDiagSchemaName() Get the name of the SYSCS_DIAG schema.
public String	getSystemSchemaName() Get the name of the system schema.
public String	getSystemUtilSchemaName() Get the name of the SYSCS_UTIL schema.
public TableDescriptor	getTableDescriptorForDeclaredGlobalTempTable(String tableName)
public TransactionController	getTransactionCompile() Get the transaction controller to use at compile time with this language connection context.
public TransactionController	getTransactionExecute()
public TriggerExecutionContext	getTriggerExecutionContext() Get the topmost tec.
public TableDescriptor	getTriggerTable()
public String	getUniqueCursorName() Get a connection unique system generated name for a cursor.
public int	getUniqueSavepointID() Get a connection unique system generated id for an unnamed savepoint.
public String	getUniqueSavepointName() Get a connection unique system generated name for an unnamed savepoint.
public int	incrementBindCount()
protected SchemaDescriptor	initDefaultSchemaDescriptor()
public void	initialize(boolean sqlConnection)
public void	internalCommit(boolean commitStore) Do a commit as appropriate for an internally generated commit (e.g.
final public void	internalCommitNoSync(int commitflag) Commit the language transaction by doing a commitNoSync() on the store's TransactionController. Do NOT tell the data dictionary that the transaction is finished.
public void	internalRollback() Do a rollback as appropriate for an internally generated rollback (e.g.
public void	internalRollbackToSavepoint(String savepointName, boolean refreshStyle, Object kindOfSavepoint) Let the context deal with a rollback to savepoint Parameters: savepointName - Name of the savepoint that needs to be rolled back Parameters: refreshStyle - boolean indicating whether or not the controller should closeopen conglomerates and scans.
public boolean	isIsolationLevelSetUsingSQLorJDBC()
public boolean	isLastHandler(int severity)
public boolean	isReadOnly()
public boolean	isTransactionPristine() Reports whether there is any outstanding work in the transaction.
public void	languageSetSavePoint(String savepointName, Object kindOfSavepoint) Sets a savepoint.
public Long	lastAutoincrementValue(String schemaName, String tableName, String columnName) Implements ConnectionInfo.lastAutoincrementValue. lastAutoincrementValue searches for the last autoincrement value inserted into a column specified by the user.
public CursorActivation	lookupCursorActivation(String cursorName) See if a given cursor is available for use. if so return its activation.
public PreparedStatement	lookupStatement(GenericStatement statement) See if a given statement has already been compiled for this user, and if so use its prepared statement.
public void	markTempTableAsModifiedInUnitOfWork(String tableName)
public long	nextAutoincrementValue(String schemaName, String tableName, String columnName) returns the next value to be inserted into an autoincrement col. This is used internally by the system to generate autoincrement values which are going to be inserted into a autoincrement column.
public void	notifyUnusedActivation()
public void	popCompilerContext(CompilerContext cc) Pop a CompilerContext off the context stack.
public void	popExecutionStmtValidator(ExecutionStmtValidator validator) Remove the validator.
public void	popStatementContext(StatementContext statementContext, Throwable error) Pop a StatementContext of the context stack.
public void	popTriggerExecutionContext(TriggerExecutionContext tec) Remove the tec.
public void	popTriggerTable(TableDescriptor td) Remove the trigger table descriptor.
public PreparedStatement	prepareInternalStatement(SchemaDescriptor compilationSchema, String sqlText, boolean isForReadOnly, boolean forMetaData)
public PreparedStatement	prepareInternalStatement(String sqlText)
final public CompilerContext	pushCompilerContext() Push a CompilerContext on the context stack with the current default schema as the default schema which we compile against.
public CompilerContext	pushCompilerContext(SchemaDescriptor sd) Push a CompilerContext on the context stack with the passed in default schema as the default schema we compile against.
public void	pushExecutionStmtValidator(ExecutionStmtValidator validator) Push a new execution statement validator.
public StatementContext	pushStatementContext(boolean isAtomic, boolean isForReadOnly, String stmtText, ParameterValueSet pvs, boolean rollbackParentContext, long timeoutMillis) Push a StatementContext on the context stack. Parameters: isAtomic - whether this statement is atomic or not Parameters: isForReadOnly - whether this statement is for a read only resultset Parameters: stmtText - the text of the statement.
public void	pushTriggerExecutionContext(TriggerExecutionContext tec) Push a new trigger execution context.
public void	pushTriggerTable(TableDescriptor td) Set the trigger table descriptor.
public void	releaseSavePoint(String savepointName, Object kindOfSavepoint)
public void	removeActivation(Activation a) Remove the activation to those known about by this connection.
public void	removeStatement(Statement statement) This method will remove a statement from the statement cache.
public void	resetFromPool() Reset the connection before it is returned (indirectly) by a PooledConnection object.
public void	resetIsolationLevelFlagUsedForSQLandJDBC()
protected void	resetStatementDepth() Resets the statementDepth.
public void	setAutoincrementUpdate(boolean flag)
final public void	setDataDictionaryWriteMode()
public void	setDefaultSchema(SchemaDescriptor sd) Set the default schema -- used by SET SCHEMA.
public void	setDrdaID(String drdaID)
public void	setIdentityValue(long val) Set the field of most recently generated identity column value.
public void	setIsolationLevel(int isolationLevel)
public void	setLogStatementText(boolean logStatementText)
public boolean	setOptimizerTrace(boolean onOrOff)
public boolean	setOptimizerTraceHtml(boolean onOrOff)
public void	setOptimizerTraceOutput(String startingText)
public void	setPrepareIsolationLevel(int level)
public void	setReadOnly(boolean on)
public void	setRunTimeStatisticsMode(boolean onOrOff)
public void	setRunTimeStatisticsObject(RunTimeStatistics runTimeStatisticsObject)
public void	setStatisticsTiming(boolean onOrOff)
public void	setTransaction(TransactionController tran) Sets the transaction controller to use with this language connection context.
public void	userCommit() Do a commmit as is appropriate for a user requested commit (e.g.
public void	userRollback() Do a rollback as is appropriate for a user requested rollback (e.g.
public boolean	usesSqlAuthorization()
public void	validateStmtExecution(ConstantAction constantAction) Validate a statement.
public boolean	verifyAllHeldResultSetsAreClosed() Verify that there are no activations with open held result sets.
public boolean	verifyNoOpenResultSets(PreparedStatement pStmt, Provider provider, int action) Verify that there are no activations with open result sets on the specified prepared statement.
final public void	xaCommit(boolean onePhase) Same as userCommit except commit a distributed transaction.
public void	xaRollback() Same as userRollback() except rolls back a distrubuted transaction.

Field Detail

af
protected AccessFactory af(Code)

authorizer
protected Authorizer authorizer(Code)

bindCount
protected int bindCount(Code)

childTransaction
protected TransactionController childTransaction(Code)
	If non-null indicates that a nested user transaction is in progress.

connFactory
protected LanguageConnectionFactory connFactory(Code)

dataFactory
protected DataValueFactory dataFactory(Code)

isolationLevel
protected int isolationLevel(Code)

langFactory
protected LanguageFactory langFactory(Code)

nextCursorId
protected long nextCursorId(Code)

nextSavepointId
protected int nextSavepointId(Code)

of
protected OptimizerFactory of(Code)

outermostTrigger
protected int outermostTrigger(Code)

prepareIsolationLevel
protected int prepareIsolationLevel(Code)

queryNestingDepth
protected int queryNestingDepth(Code)
	queryNestingDepth is a counter used to keep track of how many calls have been made to begin nested transactions. Only the first call actually starts a Nested User Transaction with the store. Subsequent calls simply increment this counter. commitNestedTransaction only decrements the counter and when it drops to 0 actually commits the nested user transaction.

sd
protected SchemaDescriptor sd(Code)

statementCache
public CacheManager statementCache(Code)

tcf
protected TypeCompilerFactory tcf(Code)

tran
protected TransactionController tran(Code)
	The transaction to use within this language connection context. It may be more appropriate to have it in a separate context (LanguageTransactionContext?). REVISIT (nat): I shoehorned the transaction context that the language uses into this class. The main purpose is so that the various language code can find out what its transaction is.

userName
protected String userName(Code)

Constructor Detail

GenericLanguageConnectionContext
public GenericLanguageConnectionContext(ContextManager cm, TransactionController tranCtrl, LanguageFactory lf, LanguageConnectionFactory lcf, Database db, String userName, int instanceNumber, String drdaID, String dbname) throws StandardException(Code)

Method Detail

addActivation
public void addActivation(Activation a) throws StandardException(Code)
	Add the activation to those known about by this connection.

addDeclaredGlobalTempTable
public void addDeclaredGlobalTempTable(TableDescriptor td) throws StandardException(Code)
	See Also: LanguageConnectionContext.addDeclaredGlobalTempTable

anyoneBlocked
public boolean anyoneBlocked()(Code)
	Return true if any transaction is blocked, even if not by this one

appendErrorInfo
public StringBuffer appendErrorInfo()(Code)

appendOptimizerTraceOutput
public void appendOptimizerTraceOutput(String output)(Code)
	See Also: LanguageConnectionContext.appendOptimizerTraceOutput

autoincrementCreateCounter
public void autoincrementCreateCounter(String s, String t, String c, Long initialValue, long increment, int position)(Code)
	See Also: LanguageConnectionContext.autoincrementCreateCounter

autoincrementFlushCache
public void autoincrementFlushCache(UUID tableUUID) throws StandardException(Code)
	Flush the cache of autoincrement values being kept by the lcc. This will result in the autoincrement values being written to the SYSCOLUMNS table as well as the mapping used by lastAutoincrementValue exception: StandardException - thrown on error. See Also: LanguageConnectionContext.lastAutoincrementValue See Also: GenericLanguageConnectionContext.lastAutoincrementValue See Also: org.apache.derby.iapi.db.ConnectionInfo.lastAutoincrementValue

beginNestedTransaction
public void beginNestedTransaction(boolean readOnly) throws StandardException(Code)
	Start a Nested User Transaction (NUT) with the store. If a NUT is already active simply increment a counter, queryNestingDepth, to keep track of how many times we have tried to start a NUT.

checkIfAnyDeclaredGlobalTempTablesForThisConnection
public boolean checkIfAnyDeclaredGlobalTempTablesForThisConnection()(Code)
	See Also: LanguageConnectionContext.checkIfAnyDeclaredGlobalTempTablesForThisConnection

cleanupOnError

public void cleanupOnError(Throwable error) throws StandardException(Code)

If worse than a transaction error, everything goes; we rely on other contexts to kill the context manager for this session.

If a transaction error, act like we saw a rollback.

If more severe or a java error, the outer cleanup will shutdown the connection, so we don't have to clean up.

REMIND: connection should throw out all contexts and start over when the connection is closed... perhaps by throwing out the context manager?

REVISIT: If statement error, should we do anything?

Since the access manager's own context takes care of its own resources on errors, there is nothing that this context has to do with the transaction controller.
exception:
StandardException - thrown on error. REVISIT: don't wantcleanupOnError's to throw exceptions.

commitNestedTransaction
public void commitNestedTransaction() throws StandardException(Code)

convertIdentifierCase
public String convertIdentifierCase(String id) throws StandardException(Code)
	Convert an identifier to the proper case for this connection. This method is here to support the Plugin. Parameters: id - an identifier string the string converted to upper or lower case, as appropriate exception: StandardException - thrown if something goes wrong

copyHashtableToAIHT
public void copyHashtableToAIHT(Hashtable from)(Code)
	Copies an existing hashtable of autoincrement mappings into autoincrementHT, the cache of autoincrement values kept in the languageconnectioncontext.

dataDictionaryInWriteMode
final public boolean dataDictionaryInWriteMode()(Code)
	See Also: LanguageConnectionContext.dataDictionaryInWriteMode See Also:

decrementBindCount
public int decrementBindCount()(Code)
	See Also: LanguageConnectionContext.decrementBindCount See Also:

doCommit

protected void doCommit(boolean commitStore, boolean sync, int commitflag, boolean requestedByUser) throws StandardException(Code)

This is where the work on internalCommit(), userCOmmit() and internalCommitNoSync() actually takes place.

When a commit happens, the language connection context will close all open activations/cursors and commit the Store transaction.

REVISIT: we talked about having a LanguageTransactionContext, but since store transaction management is currently in flux and our context might want to delegate to that context, for now all commit/rollback actions are handled directly by the language connection context. REVISIT: this may need additional alterations when RELEASE SAVEPOINT/ROLLBACK TO SAVEPOINT show up.

Since the access manager's own context takes care of its own resources on commit, and the transaction stays open, there is nothing that this context has to do with the transaction controller.

Also, tell the data dictionary that the transaction is finished, if necessary (that is, if the data dictionary was put into DDL mode in this transaction.
Parameters:
  commitStore - true if we should commit the Store transaction
Parameters:
  sync - true means do a synchronized commit,false means do an unsynchronized commit
Parameters:
  commitflag - if this is an unsynchronized commit, the flags topass to commitNoSync in the store'sTransactionController. If this is a synchronizedcommit, this flag is overloaded for xacommit.
Parameters:
  requestedByUser - False iff the commit is for internal use andwe should ignore the check to prevent commitsin an atomic statement.
exception:
  StandardException - Thrown on error

dropDeclaredGlobalTempTable
public boolean dropDeclaredGlobalTempTable(String tableName)(Code)
	See Also: LanguageConnectionContext.dropDeclaredGlobalTempTable

emptyCache
public void emptyCache()(Code)
	Empty as much of the cache as possible. It is not guaranteed that the cache is empty after this call, as statements may be kept by currently executing queries, activations that are about to be garbage collected.

getAccessFactory
public AccessFactory getAccessFactory()(Code)
	See Also: LanguageConnectionContext.getAccessFactory See Also:

getActivationCount
public int getActivationCount()(Code)
	Return the number of activations known for this connection. Note that some of these activations may not be in use (when a prepared statement is finalized, its activations are marked as unused and later closed and removed on the next commit/rollback).

getAuthorizationId
public String getAuthorizationId()(Code)
	Get the Authorization Id String the authorization id

getAuthorizer
public Authorizer getAuthorizer()(Code)
	See Also: LanguageConnectionContext.getAuthorizer

getAutoincrementUpdate
public boolean getAutoincrementUpdate()(Code)
	See Also: LanguageConnectionContext.getAutoincrementUpdate

getBindCount
public int getBindCount()(Code)
	See Also: LanguageConnectionContext.getBindCount See Also:

getCacheSize
public int getCacheSize()(Code)

getCurrentIsolationLevel
public int getCurrentIsolationLevel()(Code)
	See Also: LanguageConnectionContext.getCurrentIsolationLevel

getCurrentIsolationLevelStr
public String getCurrentIsolationLevelStr()(Code)
	See Also: LanguageConnectionContext.getCurrentIsolationLevel

getCurrentSchemaName
public String getCurrentSchemaName()(Code)
	Get the current schema name current schema name

getDataDictionary
public DataDictionary getDataDictionary()(Code)

getDataValueFactory
public DataValueFactory getDataValueFactory()(Code)
	Get the data value factory to use with this language connection context.

getDatabase
public Database getDatabase()(Code)
	See Also: LanguageConnectionContext.getDatabase

getDbname
public String getDbname()(Code)
	See Also: LanguageConnectionContext.getDbname

getDeclaredGlobalTemporaryTablesSchemaName
public String getDeclaredGlobalTemporaryTablesSchemaName() throws StandardException(Code)
	Get the declared global temporary tables schema name. a String containing the declared global temporary tables schema name. throws: StandardException -

getDefaultSchema
public SchemaDescriptor getDefaultSchema()(Code)
	Get the default schema SchemaDescriptor the default schema

getDrdaID
public String getDrdaID()(Code)
	See Also: LanguageConnectionContext.getDrdaID

getExecutionContext
public ExecutionContext getExecutionContext()(Code)
	See Also: LanguageConnectionContext.getExecutionContext

getIdentifierCasing
public int getIdentifierCasing() throws StandardException(Code)
	Get casing for delimited identifiers. This feature is here to support the Plugin. ANSI_CASING or ANTI_ANSI_CASING. exception: StandardException - thrown if something goes wrong

getIdentityValue
public Long getIdentityValue()(Code)
	Get the identity column value most recently generated. the generated identity column value

getInstanceNumber
public int getInstanceNumber()(Code)
	See Also: LanguageConnectionContext.getInstanceNumber

getLanguageConnectionFactory
public LanguageConnectionFactory getLanguageConnectionFactory()(Code)
	Get the language connection factory to use with this language connection context.

getLanguageFactory
public LanguageFactory getLanguageFactory()(Code)
	Get the language factory to use with this language connection context.

getLastActivation
public Activation getLastActivation()(Code)
	See Also: LanguageConnectionContext.getLastActivation

getLockEscalationThreshold
public int getLockEscalationThreshold()(Code)
	get the lock escalation threshold.

getLockObject
public Object getLockObject(int lockScope) throws StandardException(Code)
	Get the lock handle for the current transaction. Parameters: lockScope - SINGLE_TRANSACTION_LOCK or MULTI_TRANSACTION_LOCK the current lock handle exception: StandardException - thrown if something goes wrong

getLogQueryPlan
public boolean getLogQueryPlan()(Code)
	See Also: LanguageConnectionContext.getLogQueryPlan

getLogStatementText
public boolean getLogStatementText()(Code)
	See Also: LanguageConnectionContext.getLogStatementText

getOptimizerFactory
public OptimizerFactory getOptimizerFactory()(Code)

getOptimizerTrace
public boolean getOptimizerTrace()(Code)
	See Also: LanguageConnectionContext.getOptimizerTrace

getOptimizerTraceHtml
public boolean getOptimizerTraceHtml()(Code)
	See Also: LanguageConnectionContext.getOptimizerTraceHtml

getOptimizerTraceOutput
public String getOptimizerTraceOutput()(Code)
	See Also: LanguageConnectionContext.getOptimizerTraceOutput

getPrepareIsolationLevel
public int getPrepareIsolationLevel()(Code)
	See Also: LanguageConnectionContext.getPrepareIsolationLevel

getRunTimeStatisticsMode
public boolean getRunTimeStatisticsMode()(Code)
	See Also: LanguageConnectionContext.getRunTimeStatisticsMode See Also:

getRunTimeStatisticsObject
public RunTimeStatistics getRunTimeStatisticsObject()(Code)
	See Also: LanguageConnectionContext.getRunTimeStatisticsObject See Also:

getStatementContext
public StatementContext getStatementContext()(Code)
	See Also: LanguageConnectionContext.getStatementContext

getStatementDepth
public int getStatementDepth()(Code)
	Reports how many statement levels deep we are. a statement level >= OUTERMOST_STATEMENT

getStatisticsTiming
public boolean getStatisticsTiming()(Code)
	See Also: LanguageConnectionContext.getStatisticsTiming See Also:

getSysIBMSchemaName
public String getSysIBMSchemaName() throws StandardException(Code)
	Get the name of the SYSIBM schema. A String containing the name of the SYSIBM schema. throws: StandardException -

getSystemDiagSchemaName
public String getSystemDiagSchemaName() throws StandardException(Code)
	Get the name of the SYSCS_DIAG schema. A String containing the name of the SYSIBM schema. throws: StandardException -

getSystemSchemaName
public String getSystemSchemaName() throws StandardException(Code)
	Get the name of the system schema. A String containing the name of the system schema. throws: StandardException -

getSystemUtilSchemaName
public String getSystemUtilSchemaName() throws StandardException(Code)
	Get the name of the SYSCS_UTIL schema. A String containing the name of the SYSIBM schema. throws: StandardException -

getTableDescriptorForDeclaredGlobalTempTable
public TableDescriptor getTableDescriptorForDeclaredGlobalTempTable(String tableName)(Code)
	See Also: LanguageConnectionContext.getTableDescriptorForDeclaredGlobalTempTable

getTransactionCompile
public TransactionController getTransactionCompile()(Code)
	Get the transaction controller to use at compile time with this language connection context. If a NUT is active then return NUT else return parent transaction.

getTransactionExecute
public TransactionController getTransactionExecute()(Code)

getTriggerExecutionContext
public TriggerExecutionContext getTriggerExecutionContext()(Code)
	Get the topmost tec. the tec

getTriggerTable
public TableDescriptor getTriggerTable()(Code)
	Get the topmost trigger table descriptor the table descriptor, or null if wearen't in the middle of compiling a createtrigger.

getUniqueCursorName
public String getUniqueCursorName()(Code)
	Get a connection unique system generated name for a cursor.

getUniqueSavepointID
public int getUniqueSavepointID()(Code)
	Get a connection unique system generated id for an unnamed savepoint.

getUniqueSavepointName
public String getUniqueSavepointName()(Code)
	Get a connection unique system generated name for an unnamed savepoint.

incrementBindCount
public int incrementBindCount()(Code)
	See Also: LanguageConnectionContext.incrementBindCount See Also:

initDefaultSchemaDescriptor
protected SchemaDescriptor initDefaultSchemaDescriptor() throws StandardException(Code)

initialize
public void initialize(boolean sqlConnection) throws StandardException(Code)

internalCommit
public void internalCommit(boolean commitStore) throws StandardException(Code)
	Do a commit as appropriate for an internally generated commit (e.g. as needed by sync, or autocommit). Parameters: commitStore - true if we should commit the Store transaction exception: StandardException - thrown on failure

internalCommitNoSync
final public void internalCommitNoSync(int commitflag) throws StandardException(Code)
	Commit the language transaction by doing a commitNoSync() on the store's TransactionController. Do NOT tell the data dictionary that the transaction is finished. The reason is that this would allow other transactions to see comitted DDL that could be undone in the event of a system crash. Parameters: commitflag - the flags to pass to commitNoSync in the store'sTransactionController exception: StandardException - thrown on failure

internalRollback

public void internalRollback() throws StandardException(Code)

Do a rollback as appropriate for an internally generated rollback (e.g. as needed by sync, or autocommit). When a rollback happens, we close all open activations and invalidate their prepared statements. We then tell the cache to age out everything else, which effectively invalidates them. Thus, all prepared statements will be compiled anew on their 1st execution after a rollback.

The invalidated statements can revalidate themselves without a full recompile if they verify their dependencies' providers still exist unchanged. REVISIT when invalidation types are created.

REVISIT: this may need additional alterations when RELEASE SAVEPOINT/ROLLBACK TO SAVEPOINT show up.

Also, tell the data dictionary that the transaction is finished, if necessary (that is, if the data dictionary was put into DDL mode in this transaction.
exception:
StandardException - thrown on failure

internalRollbackToSavepoint
public void internalRollbackToSavepoint(String savepointName, boolean refreshStyle, Object kindOfSavepoint) throws StandardException(Code)
	Let the context deal with a rollback to savepoint Parameters: savepointName - Name of the savepoint that needs to be rolled back Parameters: refreshStyle - boolean indicating whether or not the controller should closeopen conglomerates and scans. Also used to determine if language should closeopen activations. Parameters: kindOfSavepoint - A NULL value means it is an internal savepoint (ie not a user defined savepoint)Non NULL value means it is a user defined savepoint which can be a SQL savepoint or a JDBC savepointA String value for kindOfSavepoint would mean it is SQL savepointA JDBC Savepoint object value for kindOfSavepoint would mean it is JDBC savepoint exception: StandardException - thrown if something goes wrong

isIsolationLevelSetUsingSQLorJDBC
public boolean isIsolationLevelSetUsingSQLorJDBC()(Code)
	See Also: LanguageConnectionContext.isIsolationLevelSetUsingSQLorJDBC

isLastHandler
public boolean isLastHandler(int severity)(Code)
	See Also: Context.isLastHandler

isReadOnly
public boolean isReadOnly()(Code)
	See Also: LanguageConnectionContext.isReadOnly

isTransactionPristine
public boolean isTransactionPristine()(Code)
	Reports whether there is any outstanding work in the transaction. true if there is outstanding work in the transactionfalse otherwise

languageSetSavePoint
public void languageSetSavePoint(String savepointName, Object kindOfSavepoint) throws StandardException(Code)
	Sets a savepoint. Causes the Store to set a savepoint. Parameters: savepointName - name of savepoint Parameters: kindOfSavepoint - A NULL value means it is an internal savepoint (ie not a user defined savepoint)Non NULL value means it is a user defined savepoint which can be a SQL savepoint or a JDBC savepointA String value for kindOfSavepoint would mean it is SQL savepointA JDBC Savepoint object value for kindOfSavepoint would mean it is JDBC savepoint exception: StandardException - thrown if something goes wrong

lastAutoincrementValue
public Long lastAutoincrementValue(String schemaName, String tableName, String columnName)(Code)
	Implements ConnectionInfo.lastAutoincrementValue. lastAutoincrementValue searches for the last autoincrement value inserted into a column specified by the user. The search for the "last" value supports nesting levels caused by triggers (Only triggers cause nesting, not server side JDBC). If lastAutoincrementValue is called from within a trigger, the search space for ai-values are those values that are inserted by this trigger as well as previous triggers; i.e if a SQL statement fires trigger T1, which in turn does something that fires trigger t2, and if lastAutoincrementValue is called from within t2, then autoincrement values genereated by t1 are visible to it. By the same logic, if it is called from within t1, then it does not see values inserted by t2. See Also: LanguageConnectionContext.lastAutoincrementValue See Also: org.apache.derby.iapi.db.ConnectionInfo.lastAutoincrementValue

lookupCursorActivation
public CursorActivation lookupCursorActivation(String cursorName)(Code)
	See if a given cursor is available for use. if so return its activation. Returns null if not found. For use in execution. the activation for the given cursor, nullif none was found.

lookupStatement
public PreparedStatement lookupStatement(GenericStatement statement) throws StandardException(Code)
	See if a given statement has already been compiled for this user, and if so use its prepared statement. Returns null if not found. exception: StandardException - thrown if lookup goes wrong. the prepared statement for the given string, nullif none was found.

markTempTableAsModifiedInUnitOfWork
public void markTempTableAsModifiedInUnitOfWork(String tableName)(Code)
	See Also: LanguageConnectionContext.markTempTableAsModifiedInUnitOfWork

nextAutoincrementValue
public long nextAutoincrementValue(String schemaName, String tableName, String columnName) throws StandardException(Code)
	returns the next value to be inserted into an autoincrement col. This is used internally by the system to generate autoincrement values which are going to be inserted into a autoincrement column. This is used when as autoincrement column is added to a table by an alter table statemenet and during bulk insert. Parameters: schemaName - Parameters: tableName - Parameters: columnName - identify the column uniquely in the system.

notifyUnusedActivation
public void notifyUnusedActivation()(Code)
	Make a note that some activations are marked unused

popCompilerContext
public void popCompilerContext(CompilerContext cc)(Code)
	Pop a CompilerContext off the context stack. Parameters: cc - The compiler context.

popExecutionStmtValidator
public void popExecutionStmtValidator(ExecutionStmtValidator validator) throws StandardException(Code)
	Remove the validator. Does an object identity (validator == validator) comparison. Asserts that the validator is found. Parameters: validator - the validator to remove exception: StandardException - on error

popStatementContext
public void popStatementContext(StatementContext statementContext, Throwable error)(Code)
	Pop a StatementContext of the context stack. Parameters: statementContext - The statement context. Parameters: error - The error, if any (Only relevant for DEBUG)

popTriggerExecutionContext
public void popTriggerExecutionContext(TriggerExecutionContext tec) throws StandardException(Code)
	Remove the tec. Does an object identity (tec == tec) comparison. Asserts that the tec is found. Parameters: tec - the tec to remove exception: StandardException - on error

popTriggerTable
public void popTriggerTable(TableDescriptor td)(Code)
	Remove the trigger table descriptor. Parameters: td - the table to remove from the stack.

prepareInternalStatement
public PreparedStatement prepareInternalStatement(SchemaDescriptor compilationSchema, String sqlText, boolean isForReadOnly, boolean forMetaData) throws StandardException(Code)
	See Also: LanguageConnectionContext.prepareInternalStatement

prepareInternalStatement
public PreparedStatement prepareInternalStatement(String sqlText) throws StandardException(Code)
	See Also: LanguageConnectionContext.prepareInternalStatement

pushCompilerContext
final public CompilerContext pushCompilerContext()(Code)
	Push a CompilerContext on the context stack with the current default schema as the default schema which we compile against. the compiler context exception: StandardException - thrown on failure

pushCompilerContext
public CompilerContext pushCompilerContext(SchemaDescriptor sd)(Code)
	Push a CompilerContext on the context stack with the passed in default schema as the default schema we compile against. Parameters: sd - the default schema the compiler context

pushExecutionStmtValidator
public void pushExecutionStmtValidator(ExecutionStmtValidator validator)(Code)
	Push a new execution statement validator. An execution statement validator is an object that validates the current statement to ensure that it is permitted given the current execution context. An example of a validator a trigger ExecutionStmtValidator that doesn't allow ddl on the trigger target table. Multiple ExecutionStmtValidators may be active at any given time. This mirrors the way there can be multiple connection nestings at a single time. The validation is performed by calling each validator's validateStatement() method. This yields the union of all validations. Parameters: validator - the validator to add

pushStatementContext
public StatementContext pushStatementContext(boolean isAtomic, boolean isForReadOnly, String stmtText, ParameterValueSet pvs, boolean rollbackParentContext, long timeoutMillis)(Code)
	Push a StatementContext on the context stack. Parameters: isAtomic - whether this statement is atomic or not Parameters: isForReadOnly - whether this statement is for a read only resultset Parameters: stmtText - the text of the statement. Needed for any languagestatement (currently, for any statement that can cause a triggerto fire). Please set this unless you are some funky jdbc setXXXmethod or something. Parameters: pvs - parameter value set, if it has one Parameters: rollbackParentContext - True if 1) the statement context isNOT a top-level context, AND 2) in the event of a statement-levelexception, the parent context needs to be rolled back, too. Parameters: timeoutMillis - timeout value for this statement, in milliseconds.The value 0 means that no timeout is set. StatementContext The statement context.

pushTriggerExecutionContext
public void pushTriggerExecutionContext(TriggerExecutionContext tec) throws StandardException(Code)
	Push a new trigger execution context. Multiple TriggerExecutionContexts may be active at any given time. Parameters: tec - the trigger execution context exception: StandardException - on trigger recursion error

pushTriggerTable
public void pushTriggerTable(TableDescriptor td)(Code)
	Set the trigger table descriptor. Used to compile statements that may special trigger pseudo tables. Parameters: td - the table that the trigger is defined upon

releaseSavePoint
public void releaseSavePoint(String savepointName, Object kindOfSavepoint) throws StandardException(Code)
	Let the context deal with a release of a savepoint Parameters: savepointName - Name of the savepoint that needs to be released Parameters: kindOfSavepoint - A NULL value means it is an internal savepoint (ie not a user defined savepoint)Non NULL value means it is a user defined savepoint which can be a SQL savepoint or a JDBC savepointA String value for kindOfSavepoint would mean it is SQL savepointA JDBC Savepoint object value for kindOfSavepoint would mean it is JDBC savepoint exception: StandardException - thrown if something goes wrong

removeActivation
public void removeActivation(Activation a)(Code)
	Remove the activation to those known about by this connection.

removeStatement
public void removeStatement(Statement statement) throws StandardException(Code)
	This method will remove a statement from the statement cache. It will be called, for example, if there is an exception preparing the statement. Parameters: statement - Statement to remove exception: StandardException - thrown if lookup goes wrong.

resetFromPool
public void resetFromPool() throws StandardException(Code)
	Reset the connection before it is returned (indirectly) by a PooledConnection object. See EmbeddedConnection.

resetIsolationLevelFlagUsedForSQLandJDBC
public void resetIsolationLevelFlagUsedForSQLandJDBC()(Code)
	See Also: LanguageConnectionContext.resetIsolationLevelFlagUsedForSQLandJDBC

resetStatementDepth
protected void resetStatementDepth()(Code)
	Resets the statementDepth.

setAutoincrementUpdate
public void setAutoincrementUpdate(boolean flag)(Code)
	See Also: LanguageConnectionContext.setAutoincrementUpdate

setDataDictionaryWriteMode
final public void setDataDictionaryWriteMode()(Code)
	See Also: LanguageConnectionContext.setDataDictionaryWriteMode See Also:

setDefaultSchema
public void setDefaultSchema(SchemaDescriptor sd) throws StandardException(Code)
	Set the default schema -- used by SET SCHEMA. Parameters: sd - the new default schema.If null, then the default schema descriptor is used. exception: StandardException - thrown on failure

setDrdaID
public void setDrdaID(String drdaID)(Code)
	See Also: LanguageConnectionContext.setDrdaID

setIdentityValue
public void setIdentityValue(long val)(Code)
	Set the field of most recently generated identity column value. Parameters: val - the generated identity column value

setIsolationLevel
public void setIsolationLevel(int isolationLevel) throws StandardException(Code)
	See Also: LanguageConnectionContext.setIsolationLevel

setLogStatementText
public void setLogStatementText(boolean logStatementText)(Code)
	See Also: LanguageConnectionContext.setLogStatementText

setOptimizerTrace
public boolean setOptimizerTrace(boolean onOrOff)(Code)
	See Also: LanguageConnectionContext.setOptimizerTrace

setOptimizerTraceHtml
public boolean setOptimizerTraceHtml(boolean onOrOff)(Code)
	See Also: LanguageConnectionContext.setOptimizerTraceHtml

setOptimizerTraceOutput
public void setOptimizerTraceOutput(String startingText)(Code)
	See Also: LanguageConnectionContext.setOptimizerTraceOutput

setPrepareIsolationLevel
public void setPrepareIsolationLevel(int level)(Code)
	See Also: LanguageConnectionContext.setPrepareIsolationLevel

setReadOnly
public void setReadOnly(boolean on) throws StandardException(Code)
	See Also: LanguageConnectionContext.setReadOnly exception: StandardException - The operation is disallowed.

setRunTimeStatisticsMode
public void setRunTimeStatisticsMode(boolean onOrOff)(Code)
	See Also: LanguageConnectionContext.setRunTimeStatisticsMode See Also:

setRunTimeStatisticsObject
public void setRunTimeStatisticsObject(RunTimeStatistics runTimeStatisticsObject)(Code)
	See Also: LanguageConnectionContext.setRunTimeStatisticsObject See Also:

setStatisticsTiming
public void setStatisticsTiming(boolean onOrOff)(Code)
	See Also: LanguageConnectionContext.setStatisticsTiming See Also:

setTransaction
public void setTransaction(TransactionController tran)(Code)
	Sets the transaction controller to use with this language connection context. Parameters: tran - the transaction to use with this language connection context

userCommit
public void userCommit() throws StandardException(Code)
	Do a commmit as is appropriate for a user requested commit (e.g. a java.sql.Connection.commit() or a language 'COMMIT' statement. Does some extra checking to make sure that users aren't doing anything bad. exception: StandardException - thrown on failure

userRollback
public void userRollback() throws StandardException(Code)
	Do a rollback as is appropriate for a user requested rollback (e.g. a java.sql.Connection.rollback() or a language 'ROLLBACk' statement. Does some extra checking to make sure that users aren't doing anything bad. exception: StandardException - thrown on failure

usesSqlAuthorization
public boolean usesSqlAuthorization()(Code)
	See Also: LanguageConnectionContext.usesSqlAuthorization

validateStmtExecution
public void validateStmtExecution(ConstantAction constantAction) throws StandardException(Code)
	Validate a statement. Does so by stepping through all the validators and executing them. If a validator throws and exception, then the checking is stopped and the exception is passed up. Parameters: constantAction - the constantAction that is about to be executed (andshould be validated exception: StandardException - on validation failure

verifyAllHeldResultSetsAreClosed
public boolean verifyAllHeldResultSetsAreClosed() throws StandardException(Code)
	Verify that there are no activations with open held result sets. boolean Found no open (held) resultsets. exception: StandardException - thrown on failure

verifyNoOpenResultSets
public boolean verifyNoOpenResultSets(PreparedStatement pStmt, Provider provider, int action) throws StandardException(Code)
	Verify that there are no activations with open result sets on the specified prepared statement. Parameters: pStmt - The prepared Statement Parameters: provider - The object precipitating a possible invalidation Parameters: action - The action causing the possible invalidation Nothing. exception: StandardException - thrown on failure

xaCommit
final public void xaCommit(boolean onePhase) throws StandardException(Code)
	Same as userCommit except commit a distributed transaction. This commit always commit store and sync the commit. Parameters: onePhase - if true, allow it to commit without first going thru aprepared state. exception: StandardException - thrown if something goes wrong

xaRollback
public void xaRollback() throws StandardException(Code)
	Same as userRollback() except rolls back a distrubuted transaction. exception: StandardException - thrown if something goes wrong

Methods inherited from org.apache.derby.iapi.services.context.ContextImpl

public StringBuffer appendErrorInfo()(Code)(Java Doc)
final public ContextManager getContextManager()(Code)(Java Doc)
final public String getIdName()(Code)(Java Doc)
public boolean isLastHandler(int severity)(Code)(Java Doc)
final public void popMe()(Code)(Java Doc)
final public void pushMe()(Code)(Java Doc)

Methods inherited from java.lang.Object

native protected Object clone() throws CloneNotSupportedException(Code)(Java Doc)
public boolean equals(Object obj)(Code)(Java Doc)
protected void finalize() throws Throwable(Code)(Java Doc)
final native public Class getClass()(Code)(Java Doc)
native public int hashCode()(Code)(Java Doc)
final native public void notify()(Code)(Java Doc)
final native public void notifyAll()(Code)(Java Doc)
public String toString()(Code)(Java Doc)
final native public void wait(long timeout) throws InterruptedException(Code)(Java Doc)
final public void wait(long timeout, int nanos) throws InterruptedException(Code)(Java Doc)
final public void wait() throws InterruptedException(Code)(Java Doc)

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