GenericPreparedStatement.java
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org.apache.derby.impl.sql |
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Apache Derby |
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| JAVA0256 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0110 | JAVA0110 Incorrect javadoc: no @return tag | |
/*
Derby - Class org.apache.derby.impl.sql.GenericPreparedStatement
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to you under the Apache License, Version 2.0
(the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package org.apache.derby.impl.sql;
import org.apache.derby.catalog.Dependable;
import org.apache.derby.catalog.DependableFinder;
import org.apache.derby.iapi.services.context.ContextService;
import org.apache.derby.iapi.services.context.ContextManager;
import org.apache.derby.iapi.services.monitor.Monitor;
import org.apache.derby.iapi.services.sanity.SanityManager;
import org.apache.derby.iapi.services.stream.HeaderPrintWriter;
import org.apache.derby.iapi.services.cache.Cacheable;
import org.apache.derby.catalog.UUID;
import org.apache.derby.iapi.services.uuid.UUIDFactory;
import org.apache.derby.iapi.util.ByteArray;
import org.apache.derby.iapi.sql.dictionary.DataDictionary;
import org.apache.derby.iapi.sql.dictionary.SchemaDescriptor;
import org.apache.derby.iapi.sql.dictionary.SPSDescriptor;
import org.apache.derby.iapi.sql.ParameterValueSet;
import org.apache.derby.iapi.sql.PreparedStatement;
import org.apache.derby.iapi.sql.Statement;
import org.apache.derby.iapi.types.DataTypeDescriptor;
import org.apache.derby.iapi.sql.ResultColumnDescriptor;
import org.apache.derby.iapi.sql.ResultDescription;
import org.apache.derby.iapi.sql.ResultSet;
import org.apache.derby.iapi.sql.Activation;
import org.apache.derby.iapi.sql.execute.ConstantAction;
import org.apache.derby.iapi.sql.execute.ExecCursorTableReference;
import org.apache.derby.iapi.sql.execute.ExecPreparedStatement;
import org.apache.derby.iapi.sql.depend.DependencyManager;
import org.apache.derby.iapi.sql.depend.Provider;
import org.apache.derby.iapi.sql.conn.LanguageConnectionContext;
import org.apache.derby.iapi.sql.conn.StatementContext;
import org.apache.derby.impl.sql.compile.CursorNode;
import org.apache.derby.impl.sql.compile.StatementNode;
import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.reference.SQLState;
import org.apache.derby.iapi.services.loader.GeneratedClass;
import java.sql.Timestamp;
import java.sql.SQLWarning;
import java.util.List;
/**
* Basic implementation of prepared statement.
* relies on implementation of ResultDescription and Statement that
* are also in this package.
* <p>
* These are both dependents (of the schema objects and prepared statements
* they depend on) and providers. Prepared statements that are providers
* are cursors that end up being used in positioned delete and update
* statements (at present).
* <p>
* This is impl with the regular prepared statements; they will never
* have the cursor info fields set.
* <p>
* Stored prepared statements extend this implementation
*
*/
public class GenericPreparedStatement
implements ExecPreparedStatement
{
///////////////////////////////////////////////
//
// WARNING: when adding members to this class, be
// sure to do the right thing in getClone(): if
// it is PreparedStatement specific like finished,
// then it shouldn't be copied, but stuff like parameters
// must be copied.
//
////////////////////////////////////////////////
////////////////////////////////////////////////
// STATE that is copied by getClone()
////////////////////////////////////////////////
public Statement statement;
protected GeneratedClass activationClass; // satisfies Activation
protected ResultDescription resultDesc;
protected DataTypeDescriptor[] paramTypeDescriptors;
private String spsName;
private SQLWarning warnings;
//If the query node for this statement references SESSION schema tables, mark it so in the boolean below
//This information will be used by EXECUTE STATEMENT if it is executing a statement that was created with NOCOMPILE. Because
//of NOCOMPILE, we could not catch SESSION schema table reference by the statement at CREATE STATEMENT time. Need to catch
//such statements at EXECUTE STATEMENT time when the query is getting compiled.
//This information will also be used to decide if the statement should be cached or not. Any statement referencing SESSION
//schema tables will not be cached.
private boolean referencesSessionSchema;
// fields used for cursors
protected ExecCursorTableReference targetTable;
protected ResultColumnDescriptor[] targetColumns;
protected String[] updateColumns;
protected int updateMode;
protected ConstantAction executionConstants;
protected Object[] savedObjects;
protected List requiredPermissionsList;
// fields for dependency tracking
protected String UUIDString;
protected UUID UUIDValue;
private boolean needsSavepoint;
private String execStmtName;
private String execSchemaName;
protected boolean isAtomic;
protected String sourceTxt;
private int inUseCount;
// true if the statement is being compiled.
boolean compilingStatement;
////////////////////////////////////////////////
// STATE that is not copied by getClone()
////////////////////////////////////////////////
// fields for run time stats
protected long parseTime;
protected long bindTime;
protected long optimizeTime;
protected long generateTime;
protected long compileTime;
protected Timestamp beginCompileTimestamp;
protected Timestamp endCompileTimestamp;
//private boolean finished;
protected boolean isValid;
protected boolean spsAction;
// state for caching.
/**
If non-null then this object is the cacheable
that holds us in the cache.
*/
private Cacheable cacheHolder;
//
// constructors
//
GenericPreparedStatement() {
/* Get the UUID for this prepared statement */
UUIDFactory uuidFactory =
Monitor.getMonitor().getUUIDFactory();
UUIDValue = uuidFactory.createUUID();
UUIDString = UUIDValue.toString();
spsAction = false;
}
/**
*/
public GenericPreparedStatement(Statement st)
{
this();
statement = st;
}
//
// PreparedStatement interface
//
public synchronized boolean upToDate()
throws StandardException
{
return isValid && (activationClass != null) && !compilingStatement;
}
public void rePrepare(LanguageConnectionContext lcc)
throws StandardException {
if (!upToDate()) {
PreparedStatement ps = statement.prepare(lcc);
if (SanityManager.DEBUG)
SanityManager.ASSERT(ps == this, "ps != this");
}
}
/**
* Get a new activation instance.
*
* @exception StandardException thrown if finished.
*/
public Activation getActivation(LanguageConnectionContext lcc,
boolean scrollable)
throws StandardException
{
Activation ac;
synchronized (this) {
GeneratedClass gc = getActivationClass();
if (gc == null) {
rePrepare(lcc);
gc = getActivationClass();
}
ac = new GenericActivationHolder(lcc, gc, this, scrollable);
inUseCount++;
}
// DERBY-2689. Close unused activations-- this method should be called
// when I'm not holding a lock on a prepared statement to avoid
// deadlock.
lcc.closeUnusedActivations();
Activation callingAct = null;
StatementContext stmctx = lcc.getStatementContext();
if (stmctx != null) {
// if not null, callingAct represents the activation of
// a calling statement and this activation corresponds to
// a statement inside a stored procedure or function
callingAct = stmctx.getActivation();
}
ac.setCallActivation(callingAct);
return ac;
}
public ResultSet execute(LanguageConnectionContext lcc,
boolean rollbackParentContext,
long timeoutMillis)
throws StandardException
{
Activation a = getActivation(lcc, false);
a.setSingleExecution();
return execute(a, rollbackParentContext, timeoutMillis);
}
/**
* The guts of execution.
*
* @param activation the activation to run.
* @param rollbackParentContext True if 1) the statement context is
* NOT a top-level context, AND 2) in the event of a statement-level
* exception, the parent context needs to be rolled back, too.
* @param timeoutMillis timeout value in milliseconds.
* @return the result set to be pawed through
*
* @exception StandardException thrown on error
*/
public ResultSet execute(Activation activation,
boolean rollbackParentContext,
long timeoutMillis)
throws
StandardException
{
boolean needToClearSavePoint = false;
if (activation == null || activation.getPreparedStatement() != this)
{
throw StandardException.newException(SQLState.LANG_WRONG_ACTIVATION, "execute");
}
recompileOutOfDatePlan:
while (true) {
// verify the activation is for me--somehow. NOTE: This is
// different from the above check for whether the activation is
// associated with the right PreparedStatement - it's conceivable
// that someone could construct an activation of the wrong type
// that points to the right PreparedStatement.
//
//SanityManager.ASSERT(activation instanceof activationClass, "executing wrong activation");
/* This is where we set and clear savepoints around each individual
* statement which needs one. We don't set savepoints for cursors because
* they're not needed and they wouldn't work in a read only database.
* We can't set savepoints for commit/rollback because they'll get
* blown away before we try to clear them.
*/
LanguageConnectionContext lccToUse = activation.getLanguageConnectionContext();
if (lccToUse.getLogStatementText())
{
HeaderPrintWriter istream = Monitor.getStream();
String xactId = lccToUse.getTransactionExecute().getActiveStateTxIdString();
String pvsString = "";
ParameterValueSet pvs = activation.getParameterValueSet();
if (pvs != null && pvs.getParameterCount() > 0)
{
pvsString = " with " + pvs.getParameterCount() +
" parameters " + pvs.toString();
}
istream.printlnWithHeader(LanguageConnectionContext.xidStr +
xactId +
"), " +
LanguageConnectionContext.lccStr +
lccToUse.getInstanceNumber() +
"), " +
LanguageConnectionContext.dbnameStr +
lccToUse.getDbname() +
"), " +
LanguageConnectionContext.drdaStr +
lccToUse.getDrdaID() +
"), Executing prepared statement: " +
getSource() +
" :End prepared statement" +
pvsString);
}
ParameterValueSet pvs = activation.getParameterValueSet();
/* put it in try block to unlock the PS in any case
*/
if (!spsAction) {
// only re-prepare if this isn't an SPS for a trigger-action;
// if it _is_ an SPS for a trigger action, then we can't just
// do a regular prepare because the statement might contain
// internal SQL that isn't allowed in other statements (such as a
// static method call to get the trigger context for retrieval
// of "new row" or "old row" values). So in that case we
// skip the call to 'rePrepare' and if the statement is out
// of date, we'll get a NEEDS_COMPILE exception when we try
// to execute. That exception will be caught by the executeSPS()
// method of the GenericTriggerExecutor class, and at that time
// the SPS action will be recompiled correctly.
rePrepare(lccToUse);
}
StatementContext statementContext = lccToUse.pushStatementContext(
isAtomic, updateMode==CursorNode.READ_ONLY, getSource(), pvs, rollbackParentContext, timeoutMillis);
statementContext.setActivation(activation);
if (needsSavepoint())
{
/* Mark this position in the log so that a statement
* rollback will undo any changes.
*/
statementContext.setSavePoint();
needToClearSavePoint = true;
}
if (executionConstants != null)
{
lccToUse.validateStmtExecution(executionConstants);
}
ResultSet resultSet = null;
try {
resultSet = activation.execute();
resultSet.open();
} catch (StandardException se) {
/* Cann't handle recompiling SPS action recompile here */
if (!se.getMessageId().equals(SQLState.LANG_STATEMENT_NEEDS_RECOMPILE)
|| spsAction)
throw se;
statementContext.cleanupOnError(se);
continue recompileOutOfDatePlan;
}
if (needToClearSavePoint)
{
/* We're done with our updates */
statementContext.clearSavePoint();
}
lccToUse.popStatementContext(statementContext, null);
if (activation.isSingleExecution() && resultSet.isClosed())
{
// if the result set is 'done', i.e. not openable,
// then we can also release the activation.
// Note that a result set with output parameters
// or rows to return is explicitly finished
// by the user.
activation.close();
}
return resultSet;
}
}
public ResultDescription getResultDescription() {
return resultDesc;
}
public DataTypeDescriptor[] getParameterTypes() {
return paramTypeDescriptors;
}
public String getSource() {
return (sourceTxt != null) ?
sourceTxt :
(statement == null) ?
"null" :
statement.getSource();
}
public void setSource(String text)
{
sourceTxt = text;
}
public final void setSPSName(String name) {
spsName = name;
}
public String getSPSName() {
return spsName;
}
/**
* Get the total compile time for the associated query in milliseconds.
* Compile time can be divided into parse, bind, optimize and generate times.
*
* @return long The total compile time for the associated query in milliseconds.
*/
public long getCompileTimeInMillis()
{
return compileTime;
}
/**
* Get the parse time for the associated query in milliseconds.
*
* @return long The parse time for the associated query in milliseconds.
*/
public long getParseTimeInMillis()
{
return parseTime;
}
/**
* Get the bind time for the associated query in milliseconds.
*
* @return long The bind time for the associated query in milliseconds.
*/
public long getBindTimeInMillis()
{
return bindTime;
}
/**
* Get the optimize time for the associated query in milliseconds.
*
* @return long The optimize time for the associated query in milliseconds.
*/
public long getOptimizeTimeInMillis()
{
return optimizeTime;
}
/**
* Get the generate time for the associated query in milliseconds.
*
* @return long The generate time for the associated query in milliseconds.
*/
public long getGenerateTimeInMillis()
{
return generateTime;
}
/**
* Get the timestamp for the beginning of compilation
*
* @return Timestamp The timestamp for the beginning of compilation.
*/
public Timestamp getBeginCompileTimestamp()
{
return beginCompileTimestamp;
}
/**
* Get the timestamp for the end of compilation
*
* @return Timestamp The timestamp for the end of compilation.
*/
public Timestamp getEndCompileTimestamp()
{
return endCompileTimestamp;
}
void setCompileTimeWarnings(SQLWarning warnings) {
this.warnings = warnings;
}
public final SQLWarning getCompileTimeWarnings() {
return warnings;
}
/**
* Set the compile time for this prepared statement.
*
* @param compileTime The compile time
*/
protected void setCompileTimeMillis(long parseTime, long bindTime,
long optimizeTime,
long generateTime,
long compileTime,
Timestamp beginCompileTimestamp,
Timestamp endCompileTimestamp)
{
this.parseTime = parseTime;
this.bindTime = bindTime;
this.optimizeTime = optimizeTime;
this.generateTime = generateTime;
this.compileTime = compileTime;
this.beginCompileTimestamp = beginCompileTimestamp;
this.endCompileTimestamp = endCompileTimestamp;
}
/**
Finish marks a statement as totally unusable.
*/
public void finish(LanguageConnectionContext lcc) {
synchronized (this) {
inUseCount--;
if (cacheHolder != null)
return;
if (inUseCount != 0) {
//if (SanityManager.DEBUG) {
// if (inUseCount < 0)
// SanityManager.THROWASSERT("inUseCount is negative " + inUseCount + " for " + this);
//}
return;
}
}
// invalidate any prepared statements that
// depended on this statement (including this one)
// prepareToInvalidate(this, DependencyManager.PREPARED_STATEMENT_INVALID);
try
{
/* NOTE: Since we are non-persistent, we "know" that no exception
* will be thrown under us.
*/
makeInvalid(DependencyManager.PREPARED_STATEMENT_RELEASE, lcc);
}
catch (StandardException se)
{
if (SanityManager.DEBUG)
{
SanityManager.THROWASSERT("Unexpected exception", se);
}
}
}
/**
* Set the Execution constants. This routine is called as we Prepare the
* statement.
*
* @param constantAction The big structure enclosing the Execution constants.
*/
final void setConstantAction( ConstantAction constantAction )
{
executionConstants = constantAction;
}
/**
* Get the Execution constants. This routine is called at Execution time.
*
* @return ConstantAction The big structure enclosing the Execution constants.
*/
public final ConstantAction getConstantAction()
{
return executionConstants;
}
/**
* Set the saved objects. Called when compilation completes.
*
* @param objects The objects to save from compilation
*/
final void setSavedObjects( Object[] objects )
{
savedObjects = objects;
}
/**
* Get the specified saved object.
*
* @param objectNum The object to get.
* @return the requested saved object.
*/
public final Object getSavedObject(int objectNum)
{
if (SanityManager.DEBUG) {
if (!(objectNum>=0 && objectNum<savedObjects.length))
SanityManager.THROWASSERT(
"request for savedObject entry "+objectNum+" invalid; "+
"savedObjects has "+savedObjects.length+" entries");
}
return savedObjects[objectNum];
}
/**
* Get the saved objects.
*
* @return all the saved objects
*/
public final Object[] getSavedObjects()
{
return savedObjects;
}
//
// Dependent interface
//
/**
Check that all of the dependent's dependencies are valid.
@return true if the dependent is currently valid
*/
public boolean isValid() {
return isValid;
}
/**
* set this prepared statement to be valid, currently used by
* GenericTriggerExecutor.
*/
public void setValid()
{
isValid = true;
}
/**
* Indicate this prepared statement is an SPS action, currently used
* by GenericTriggerExecutor.
*/
public void setSPSAction()
{
spsAction = true;
}
/**
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
@exception StandardException thrown if unable to make it invalid
*/
public void prepareToInvalidate(Provider p, int action,
LanguageConnectionContext lcc)
throws StandardException {
/*
this statement can have other open result sets
if another one is closing without any problems.
It is not a problem to create an index when there is an open
result set, since it doesn't invalidate the access path that was
chosen for the result set.
*/
switch (action) {
case DependencyManager.CHANGED_CURSOR:
case DependencyManager.CREATE_INDEX:
return;
}
/* Verify that there are no activations with open result sets
* on this prepared statement.
*/
lcc.verifyNoOpenResultSets(this, p, action);
}
/**
Mark the dependent as invalid (due to at least one of
its dependencies being invalid).
@param action The action causing the invalidation
@exception StandardException Standard Derby error policy.
*/
public void makeInvalid(int action, LanguageConnectionContext lcc)
throws StandardException
{
boolean alreadyInvalid;
synchronized (this) {
if (compilingStatement)
return;
alreadyInvalid = !isValid;
// make ourseleves invalid
isValid = false;
// block compiles while we are invalidating
compilingStatement = true;
}
try {
DependencyManager dm = lcc.getDataDictionary().getDependencyManager();
/* Clear out the old dependencies on this statement as we
* will build the new set during the reprepare in makeValid().
*/
dm.clearDependencies(lcc, this);
/*
** If we are invalidating an EXECUTE STATEMENT because of a stale
** plan, we also need to invalidate the stored prepared statement.
*/
if (execStmtName != null) {
switch (action) {
case DependencyManager.INTERNAL_RECOMPILE_REQUEST:
case DependencyManager.CHANGED_CURSOR:
{
/*
** Get the DataDictionary, so we can get the descriptor for
** the SPP to invalidate it.
*/
DataDictionary dd = lcc.getDataDictionary();
SchemaDescriptor sd = dd.getSchemaDescriptor(execSchemaName, lcc.getTransactionCompile(), true);
SPSDescriptor spsd = dd.getSPSDescriptor(execStmtName, sd);
spsd.makeInvalid(action, lcc);
break;
}
}
}
} finally {
synchronized (this) {
compilingStatement = false;
notifyAll();
}
}
}
/**
* Is this dependent persistent? A stored dependency will be required
* if both the dependent and provider are persistent.
*
* @return boolean Whether or not this dependent is persistent.
*/
public boolean isPersistent()
{
/* Non-stored prepared statements are not persistent */
return false;
}
//
// Dependable interface
//
/**
@return the stored form of this Dependable
@see Dependable#getDependableFinder
*/
public DependableFinder getDependableFinder()
{
return null;
}
/**
* Return the name of this Dependable. (Useful for errors.)
*
* @return String The name of this Dependable..
*/
public String getObjectName()
{
return UUIDString;
}
/**
* Get the Dependable's UUID String.
*
* @return String The Dependable's UUID String.
*/
public UUID getObjectID()
{
return UUIDValue;
}
/**
* Get the Dependable's class type.
*
* @return String Classname that this Dependable belongs to.
*/
public String getClassType()
{
return Dependable.PREPARED_STATEMENT;
}
/**
* Return true if the query node for this statement references SESSION schema
* tables/views.
* This method gets called at the very beginning of the compile phase of any statement.
* If the statement which needs to be compiled is already found in cache, then there is
* no need to compile it again except the case when the statement is referencing SESSION
* schema objects. There is a small window where such a statement might get cached
* temporarily (a statement referencing SESSION schema object will be removed from the
* cache after the bind phase is over because that is when we know for sure that the
* statement is referencing SESSION schema objects.)
*
* @return true if references SESSION schema tables, else false
*/
public boolean referencesSessionSchema()
{
return referencesSessionSchema;
}
/**
* Return true if the QueryTreeNode references SESSION schema tables/views.
* The return value is also saved in the local field because it will be
* used by referencesSessionSchema() method.
* This method gets called when the statement is not found in cache and
* hence it is getting compiled.
* At the beginning of compilation for any statement, first we check if
* the statement's plan already exist in the cache. If not, then we add
* the statement to the cache and continue with the parsing and binding.
* At the end of the binding, this method gets called to see if the
* QueryTreeNode references a SESSION schema object. If it does, then
* we want to remove it from the cache, since any statements referencing
* SESSION schema objects should never get cached.
*
* @return true if references SESSION schema tables/views, else false
*/
public boolean referencesSessionSchema(StatementNode qt)
throws StandardException {
//If the query references a SESSION schema table (temporary or permanent), then
// mark so in this statement
referencesSessionSchema = qt.referencesSessionSchema();
return(referencesSessionSchema);
}
//
// class interface
//
/**
Makes the prepared statement valid, assigning
values for its query tree, generated class,
and associated information.
@param qt the query tree for this statement
@exception StandardException thrown on failure.
*/
void completeCompile(StatementNode qt)
throws StandardException {
//if (finished)
// throw StandardException.newException(SQLState.LANG_STATEMENT_CLOSED, "completeCompile()");
paramTypeDescriptors = qt.getParameterTypes();
// erase cursor info in case statement text changed
if (targetTable!=null) {
targetTable = null;
updateMode = 0;
updateColumns = null;
targetColumns = null;
}
// get the result description (null for non-cursor statements)
// would we want to reuse an old resultDesc?
// or do we need to always replace in case this was select *?
resultDesc = qt.makeResultDescription();
// would look at resultDesc.getStatementType() but it
// doesn't call out cursors as such, so we check
// the root node type instead.
if (resultDesc != null)
{
/*
For cursors, we carry around some extra information.
*/
CursorInfo cursorInfo = (CursorInfo)qt.getCursorInfo();
if (cursorInfo != null)
{
targetTable = cursorInfo.targetTable;
targetColumns = cursorInfo.targetColumns;
updateColumns = cursorInfo.updateColumns;
updateMode = cursorInfo.updateMode;
}
}
isValid = true;
return;
}
public GeneratedClass getActivationClass()
throws StandardException
{
return activationClass;
}
void setActivationClass(GeneratedClass ac)
{
activationClass = ac;
}
//
// ExecPreparedStatement
//
/**
* the update mode of the cursor
*
* @return The update mode of the cursor
*/
public int getUpdateMode() {
return updateMode;
}
/**
* the target table of the cursor
*
* @return target table of the cursor
*/
public ExecCursorTableReference getTargetTable()
{
if (SanityManager.DEBUG)
{
SanityManager.ASSERT(targetTable!=null, "Not a cursor, no target table");
}
return targetTable;
}
/**
* the target columns of the cursor as a result column list
*
* @return target columns of the cursor as a result column list
*/
public ResultColumnDescriptor[] getTargetColumns() {
return targetColumns;
}
/**
* the update columns of the cursor as a update column list
*
* @return update columns of the cursor as a array of strings
*/
public String[] getUpdateColumns()
{
return updateColumns;
}
/**
* Return the cursor info in a single chunk. Used
* by StrorablePreparedStatement
*/
public Object getCursorInfo()
{
return new CursorInfo(
updateMode,
targetTable,
targetColumns,
updateColumns);
}
void setCursorInfo(CursorInfo cursorInfo)
{
if (cursorInfo != null)
{
updateMode = cursorInfo.updateMode;
targetTable = cursorInfo.targetTable;
targetColumns = cursorInfo.targetColumns;
updateColumns = cursorInfo.updateColumns;
}
}
//
// class implementation
//
/**
* Get the byte code saver for this statement.
* Overridden for StorablePreparedStatement. We
* don't want to save anything
*
* @return a byte code saver (null for us)
*/
ByteArray getByteCodeSaver()
{
return null;
}
/**
* Does this statement need a savepoint?
*
* @return true if this statement needs a savepoint.
*/
public boolean needsSavepoint()
{
return needsSavepoint;
}
/**
* Set the stmts 'needsSavepoint' state. Used
* by an SPS to convey whether the underlying stmt
* needs a savepoint or not.
*
* @param needsSavepoint true if this statement needs a savepoint.
*/
void setNeedsSavepoint(boolean needsSavepoint)
{
this.needsSavepoint = needsSavepoint;
}
/**
* Set the stmts 'isAtomic' state.
*
* @param isAtomic true if this statement must be atomic
* (i.e. it is not ok to do a commit/rollback in the middle)
*/
void setIsAtomic(boolean isAtomic)
{
this.isAtomic = isAtomic;
}
/**
* Returns whether or not this Statement requires should
* behave atomically -- i.e. whether a user is permitted
* to do a commit/rollback during the execution of this
* statement.
*
* @return boolean Whether or not this Statement is atomic
*/
public boolean isAtomic()
{
return isAtomic;
}
/**
* Set the name of the statement and schema for an "execute statement"
* command.
*/
void setExecuteStatementNameAndSchema(String execStmtName,
String execSchemaName)
{
this.execStmtName = execStmtName;
this.execSchemaName = execSchemaName;
}
/**
* Get a new prepared statement that is a shallow copy
* of the current one.
*
* @return a new prepared statement
*
* @exception StandardException on error
*/
public ExecPreparedStatement getClone() throws StandardException
{
GenericPreparedStatement clone = new GenericPreparedStatement(statement);
clone.activationClass = getActivationClass();
clone.resultDesc = resultDesc;
clone.paramTypeDescriptors = paramTypeDescriptors;
clone.executionConstants = executionConstants;
clone.UUIDString = UUIDString;
clone.UUIDValue = UUIDValue;
clone.savedObjects = savedObjects;
clone.execStmtName = execStmtName;
clone.execSchemaName = execSchemaName;
clone.isAtomic = isAtomic;
clone.sourceTxt = sourceTxt;
clone.targetTable = targetTable;
clone.targetColumns = targetColumns;
clone.updateColumns = updateColumns;
clone.updateMode = updateMode;
clone.needsSavepoint = needsSavepoint;
return clone;
}
// cache holder stuff.
public void setCacheHolder(Cacheable cacheHolder) {
this.cacheHolder = cacheHolder;
if (cacheHolder == null) {
// need to invalidate the statement
if (!isValid || (inUseCount != 0))
return;
ContextManager cm = ContextService.getFactory().getCurrentContextManager();
LanguageConnectionContext lcc =
(LanguageConnectionContext)
(cm.getContext(LanguageConnectionContext.CONTEXT_ID));
// invalidate any prepared statements that
// depended on this statement (including this one)
// prepareToInvalidate(this, DependencyManager.PREPARED_STATEMENT_INVALID);
try
{
/* NOTE: Since we are non-persistent, we "know" that no exception
* will be thrown under us.
*/
makeInvalid(DependencyManager.PREPARED_STATEMENT_RELEASE, lcc);
}
catch (StandardException se)
{
if (SanityManager.DEBUG)
{
SanityManager.THROWASSERT("Unexpected exception", se);
}
}
}
}
public String toString() {
return getObjectName();
}
public boolean isStorable() {
return false;
}
public void setRequiredPermissionsList( List requiredPermissionsList)
{
this.requiredPermissionsList = requiredPermissionsList;
}
public List getRequiredPermissionsList()
{
return requiredPermissionsList;
}
}
The table below shows all metrics for GenericPreparedStatement.java.
| Metric | Value | Description | |
|---|---|---|---|
| BLOCKS | 98.00 | Number of blocks | |
| BLOCK_COMMENT | 66.00 | Number of block comment lines | |
| COMMENTS | 441.00 | Comment lines | |
| COMMENT_DENSITY | 1.09 | Comment density | |
| COMPARISONS | 37.00 | Number of comparison operators | |
| CYCLOMATIC | 107.00 | Cyclomatic complexity | |
| DECL_COMMENTS | 62.00 | Comments in declarations | |
| DOC_COMMENT | 273.00 | Number of javadoc comment lines | |
| ELOC | 406.00 | Effective lines of code | |
| EXEC_COMMENTS | 31.00 | Comments in executable code | |
| EXITS | 66.00 | Procedure exits | |
| FUNCTIONS | 62.00 | Number of function declarations | |
| HALSTEAD_DIFFICULTY | 77.79 | Halstead difficulty | |
| HALSTEAD_EFFORT | 0.00 | Halstead effort | |
| INTERFACE_COMPLEXITY | 129.00 | Interface complexity | |
| JAVA0001 | 0.00 | JAVA0001 Package name does not contain only lower case letters | |
| JAVA0002 | 0.00 | JAVA0002 Package name does not begin with a top level domain name or country code | |
| JAVA0003 | 0.00 | JAVA0003 Minimize use of on-demand (.*) imports | |
| JAVA0004 | 0.00 | JAVA0004 Unnecessary import from java.lang | |
| JAVA0005 | 1.00 | JAVA0005 Imports not in specified order | |
| JAVA0006 | 0.00 | JAVA0006 Empty finally block | |
| JAVA0007 | 1.00 | JAVA0007 Should not declare public field | |
| JAVA0008 | 0.00 | JAVA0008 Empty catch block | |
| JAVA0009 | 0.00 | JAVA0009 Protected member in final class | |
| JAVA0010 | 0.00 | JAVA0010 Non-instantiable class does not contain a non-private static member | |
| JAVA0011 | 0.00 | JAVA0011 Abstract class does not contain an abstract method | |
| JAVA0012 | 0.00 | JAVA0012 Non-constructor method with same name as declaring class | |
| JAVA0013 | 0.00 | JAVA0013 Non-blank final field is not static | |
| JAVA0014 | 0.00 | JAVA0014 Class with only static members has non-private constructor | |
| JAVA0015 | 0.00 | JAVA0015 Package class contains public nested type | |
| JAVA0016 | 0.00 | JAVA0016 Abstract class contains public constructor | |
| JAVA0017 | 0.00 | JAVA0017 Class name does not have required form | |
| JAVA0018 | 0.00 | JAVA0018 Method name does not have required form | |
| JAVA0019 | 0.00 | JAVA0019 Interface name does not have required form | |
| JAVA0020 | 0.00 | JAVA0020 Field name does not have required form | |
| JAVA0021 | 0.00 | JAVA0021 Interface method name does not have required form | |
| JAVA0022 | 0.00 | JAVA0022 Static final field name does not have required form | |
| JAVA0023 | 0.00 | JAVA0023 Empty finalize method | |
| JAVA0024 | 0.00 | JAVA0024 Empty class | |
| JAVA0025 | 0.00 | JAVA0025 Method override is empty | |
| JAVA0026 | 0.00 | JAVA0026 Finalize method with parameters | |
| JAVA0029 | 0.00 | JAVA0029 Private method not used | |
| JAVA0030 | 0.00 | JAVA0030 Private field not used | |
| JAVA0031 | 0.00 | JAVA0031 Case statement not properly closed | |
| JAVA0032 | 2.00 | JAVA0032 Switch statement missing default | |
| JAVA0033 | 0.00 | JAVA0033 default: not last case in switch statement | |
| JAVA0034 | 6.00 | JAVA0034 Missing braces in if statement | |
| JAVA0035 | 0.00 | JAVA0035 Missing braces in for statement | |
| JAVA0036 | 0.00 | JAVA0036 Missing braces in while statement | |
| JAVA0038 | 0.00 | JAVA0038 Non-case label in switch statement | |
| JAVA0039 | 0.00 | JAVA0039 Break statement with label | |
| JAVA0040 | 0.00 | JAVA0040 Switch statement contains N cases (maximum: M) | |
| JAVA0041 | 0.00 | JAVA0041 Nested synchronized block | |
| JAVA0042 | 0.00 | JAVA0042 Empty synchronized statement | |
| JAVA0043 | 0.00 | JAVA0043 Inner class does not use outer class | |
| JAVA0044 | 0.00 | JAVA0044 Serializable class with no instance variables | |
| JAVA0045 | 0.00 | JAVA0045 Serializable class with only transient fields | |
| JAVA0046 | 0.00 | JAVA0046 Name of class not derived from Exception ends with 'Exception' | |
| JAVA0047 | 0.00 | JAVA0047 Serializable class derives from invalid base class | |
| JAVA0048 | 0.00 | JAVA0048 Name of class derived from Exception does not end with 'Exception' | |
| JAVA0049 | 0.00 | JAVA0049 Nested block at depth N (maximum: M) | |
| JAVA0050 | 0.00 | JAVA0050 Class derives from java.lang.Error | |
| JAVA0051 | 0.00 | JAVA0051 Class derives from java.lang.RuntimeException | |
| JAVA0052 | 0.00 | JAVA0052 Class derives from java.lang.Throwable | |
| JAVA0053 | 0.00 | JAVA0053 Unused label | |
| JAVA0054 | 0.00 | JAVA0054 Inheritance depth N exceeds maximum M | |
| JAVA0055 | 0.00 | JAVA0055 Class should be interface | |
| JAVA0056 | 0.00 | JAVA0056 Unnecessary abstract modifier for interface or annotation | |
| JAVA0057 | 0.00 | JAVA0057 Unnecessary default constructor | |
| JAVA0058 | 0.00 | JAVA0058 Constructor calls super() | |
| JAVA0059 | 0.00 | JAVA0059 Method override only calls super() | |
| JAVA0061 | 0.00 | JAVA0061 Inaccessible member in anonymous class | |
| JAVA0062 | 0.00 | JAVA0062 Public class missing public member or protected constructor | |
| JAVA0063 | 0.00 | JAVA0063 Identifier name should not contain '$' | |
| JAVA0064 | 0.00 | JAVA0064 N variations of identifier name (maximum: M) | |
| JAVA0065 | 0.00 | JAVA0065 Unnecessary final modifier for method in final class | |
| JAVA0066 | 0.00 | JAVA0066 Unnecessary modifier for interface nested type | |
| JAVA0067 | 0.00 | JAVA0067 Array descriptor on identifier name | |
| JAVA0068 | 0.00 | JAVA0068 Modifiers not declared in recommended order | |
| JAVA0071 | 0.00 | JAVA0071 Strings compared with == | |
| JAVA0073 | 0.00 | JAVA0073 Integer division in floating-point context | |
| JAVA0074 | 0.00 | JAVA0074 Use of Object.notify() | |
| JAVA0075 | 0.00 | JAVA0075 Method parameter hides field | |
| JAVA0076 | 0.00 | JAVA0076 Use of magic number | |
| JAVA0077 | 0.00 | JAVA0077 Private field not used in declaring class | |
| JAVA0078 | 0.00 | JAVA0078 Floating point values compared with == | |
| JAVA0079 | 0.00 | JAVA0079 Use of instance to reference static member | |
| JAVA0080 | 0.00 | JAVA0080 Import declaration not used | |
| JAVA0081 | 0.00 | JAVA0081 Boolean literal in comparison | |
| JAVA0082 | 0.00 | JAVA0082 Unnecessary widening cast | |
| JAVA0083 | 0.00 | JAVA0083 Unnecessary instanceof test | |
| JAVA0084 | 0.00 | JAVA0084 Should use compound assignment operator | |
| JAVA0085 | 0.00 | JAVA0085 Use of sun.* class | |
| JAVA0087 | 0.00 | JAVA0087 Use of Thread.sleep() | |
| JAVA0089 | 0.00 | JAVA0089 Use of restricted package | |
| JAVA0092 | 0.00 | JAVA0092 Use of restricted type | |
| JAVA0093 | 0.00 | JAVA0093 Redundant assignment | |
| JAVA0094 | 0.00 | JAVA0094 Field hides a superclass field | |
| JAVA0095 | 0.00 | JAVA0095 Uninitialized private field | |
| JAVA0096 | 0.00 | JAVA0096 Field in nested class hides outer field | |
| JAVA0098 | 1.00 | JAVA0098 Minimize use of implicit field initializers | |
| JAVA0100 | 1.00 | JAVA0100 Class contains N non-final fields (maximum: M) | |
| JAVA0101 | 0.00 | JAVA0101 Unnecessary modifier for field in interface | |
| JAVA0102 | 0.00 | JAVA0102 Last statement in finalize() not super.finalize() | |
| JAVA0103 | 0.00 | JAVA0103 Explicit call to finalize() | |
| JAVA0104 | 0.00 | JAVA0104 finalize() only calls super.finalize() | |
| JAVA0105 | 0.00 | JAVA0105 Duplicate import declaration | |
| JAVA0106 | 0.00 | JAVA0106 Unnecessary import from current package | |
| JAVA0108 | 10.00 | JAVA0108 Incorrect javadoc: no @param tag for 'parameter' | |
| JAVA0109 | 0.00 | JAVA0109 Incorrect javadoc: no parameter 'parameter' | |
| JAVA0110 | 2.00 | JAVA0110 Incorrect javadoc: no @return tag | |
| JAVA0111 | 0.00 | JAVA0111 Incorrect javadoc: @return tag for void method | |
| JAVA0112 | 0.00 | JAVA0112 Incorrect javadoc: no exception 'exception' in throws | |
| JAVA0113 | 1.00 | JAVA0113 Incorrect javadoc: no @author tag | |
| JAVA0114 | 1.00 | JAVA0114 Incorrect javadoc: no @version tag | |
| JAVA0115 | 1.00 | JAVA0115 Incorrect javadoc: no @throws or @exception tag for 'exception' | |
| JAVA0116 | 1.00 | JAVA0116 Missing javadoc: field 'field' | |
| JAVA0117 | 4.00 | JAVA0117 Missing javadoc: method 'method' | |
| JAVA0118 | 0.00 | JAVA0118 Missing javadoc: type 'type' | |
| JAVA0119 | 0.00 | JAVA0119 Control variable changed within body of for loop | |
| JAVA0123 | 0.00 | JAVA0123 Use all three components of for loop | |
| JAVA0125 | 1.00 | JAVA0125 Continue statement with label | |
| JAVA0126 | 0.00 | JAVA0126 Method declares unchecked exception in throws | |
| JAVA0128 | 0.00 | JAVA0128 Public constructor in non-public class | |
| JAVA0130 | 1.00 | JAVA0130 Non-static method does not use instance fields | |
| JAVA0131 | 0.00 | JAVA0131 Compatible method does not override base | |
| JAVA0132 | 0.00 | JAVA0132 Method overload with compatible signature | |
| JAVA0133 | 0.00 | JAVA0133 Non-synchronized method overrides synchronized method | |
| JAVA0135 | 0.00 | JAVA0135 Only one of Object.equals and Object.hashCode defined: missing 'method' | |
| JAVA0136 | 1.00 | JAVA0136 N methods defined in class (maximum: M) | |
| JAVA0137 | 0.00 | JAVA0137 Non-abstract class missing constructor | |
| JAVA0138 | 1.00 | JAVA0138 N parameters defined for method (maximum: M) | |
| JAVA0139 | 0.00 | JAVA0139 Definition of main other than public static void main(java.lang.String[]) | |
| JAVA0141 | 0.00 | JAVA0141 Unnecessary modifier for method in interface | |
| JAVA0143 | 1.00 | JAVA0143 Synchronized method | |
| JAVA0144 | 0.00 | JAVA0144 Line exceeds maximum M characters | |
| JAVA0145 | 1988.00 | JAVA0145 Tab character used in source file | |
| JAVA0150 | 0.00 | JAVA0150 java.lang.Error (or subclass) thrown | |
| JAVA0153 | 0.00 | JAVA0153 Inefficient conversion of integer to string | |
| JAVA0159 | 0.00 | JAVA0159 Inefficient conversion of string to integer | |
| JAVA0160 | 0.00 | JAVA0160 Method does not throw specified exception | |
| JAVA0161 | 0.00 | JAVA0161 Conditional wait() not in loop | |
| JAVA0163 | 0.00 | JAVA0163 Empty statement | |
| JAVA0165 | 0.00 | JAVA0165 Conflicting return statement in finally block | |
| JAVA0166 | 0.00 | JAVA0166 Generic exception caught | |
| JAVA0167 | 0.00 | JAVA0167 ThreadDeath not rethrown | |
| JAVA0169 | 0.00 | JAVA0169 Unnecessary catch block: exception 'exception' | |
| JAVA0170 | 0.00 | JAVA0170 Caught exception not derived from java.lang.Exception | |
| JAVA0171 | 0.00 | JAVA0171 Unused local variable | |
| JAVA0173 | 0.00 | JAVA0173 Unused method parameter | |
| JAVA0174 | 1.00 | JAVA0174 Assigned local variable never used | |
| JAVA0175 | 0.00 | JAVA0175 Successive assignment to variable | |
| JAVA0176 | 0.00 | JAVA0176 Local variable name does not have required form | |
| JAVA0177 | 2.00 | JAVA0177 Variable declaration missing initializer | |
| JAVA0179 | 0.00 | JAVA0179 Local variable hides visible field | |
| JAVA0233 | 0.00 | JAVA0233 Definition of serialVersionUID other than 'private static final long serialVersionUID' | |
| JAVA0234 | 0.00 | JAVA0234 Class is Serializable but does not define serialVersionUID | |
| JAVA0235 | 0.00 | JAVA0235 Class defines serialVersionUID but does not implement Serializable | |
| JAVA0236 | 0.00 | JAVA0236 Attempt to clone an object which does not implement Cloneable | |
| JAVA0237 | 0.00 | JAVA0237 Class implements Cloneable but does not have public clone method | |
| JAVA0238 | 0.00 | JAVA0238 Clone method does not call super.clone() | |
| JAVA0239 | 0.00 | JAVA0239 Class declares 'readObject' or 'writeObject' but does not implement Serializable | |
| JAVA0240 | 0.00 | JAVA0240 Serializable class which declares readObject or writeObject but not both | |
| JAVA0241 | 0.00 | JAVA0241 'readObject' or 'writeObject' should be declared private in Serializable class | |
| JAVA0242 | 0.00 | JAVA0242 Transient field in non-Serializable class | |
| JAVA0243 | 0.00 | JAVA0243 'readResolve' or 'writeReplace' should be declared private or protected | |
| JAVA0244 | 0.00 | JAVA0244 Field or method name in subclass differs only by case from inherited field or method | |
| JAVA0245 | 0.00 | JAVA0245 JUnit TestCase with non-trivial constructor | |
| JAVA0246 | 0.00 | JAVA0246 JUnit assertXXX statement missing message parameter | |
| JAVA0247 | 0.00 | JAVA0247 JUnit 'setUp()' and 'tearDown()' should call super method | |
| JAVA0248 | 0.00 | JAVA0248 JUnit method 'setUp' or 'tearDown' with incorrect signature | |
| JAVA0249 | 0.00 | JAVA0249 JUnit TestCase 'suite()' should be declared static | |
| JAVA0250 | 0.00 | JAVA0250 JUnit TestCase declares testXXX method with incorrect signature | |
| JAVA0251 | 0.00 | JAVA0251 Use '%n' for line breaks in printf/format for platform independence | |
| JAVA0252 | 0.00 | JAVA0252 'enum' is a Java 1.5 reserved word | |
| JAVA0253 | 0.00 | JAVA0253 Not all enum constants consumed in switch statement | |
| JAVA0254 | 0.00 | JAVA0254 Use enhanced for loop construct instead of Iterator | |
| JAVA0255 | 0.00 | JAVA0255 Result of method invocation not used | |
| JAVA0256 | 2.00 | JAVA0256 Assignment of external collection/array to field | |
| JAVA0257 | 0.00 | JAVA0257 Use of 'Constant Interface' anti-pattern | |
| JAVA0258 | 0.00 | JAVA0258 Implement Iterable for foreach compatibility | |
| JAVA0259 | 5.00 | JAVA0259 Return of collection/array field | |
| JAVA0260 | 0.00 | JAVA0260 Use 'enum' instead of Enumerated Type pattern | |
| JAVA0261 | 0.00 | JAVA0261 Use specialized Enum collection types | |
| JAVA0262 | 0.00 | JAVA0262 Use of char in integer context | |
| JAVA0263 | 0.00 | JAVA0263 Long literal ends with 'l' instead of 'L' | |
| JAVA0264 | 0.00 | JAVA0264 Integer math in long context - check for overflow | |
| JAVA0265 | 0.00 | JAVA0265 Use of Throwable.printStackTrace() | |
| JAVA0266 | 0.00 | JAVA0266 Use of System.out | |
| JAVA0267 | 0.00 | JAVA0267 Use of System.err | |
| JAVA0269 | 0.00 | JAVA0269 Contents of StringBuffer never used | |
| JAVA0270 | 0.00 | JAVA0270 Use Java 5.0 enhanced for loop construct to iterate over all elements in an array | |
| JAVA0271 | 0.00 | JAVA0271 Minimize use of on-demand (.*) static imports | |
| JAVA0272 | 0.00 | JAVA0272 Thread.run() called | |
| JAVA0273 | 0.00 | JAVA0273 Non-final derivative of Thread calls start() in constructor | |
| JAVA0274 | 0.00 | JAVA0274 Serializable class has a synchronized readObject() | |
| JAVA0275 | 0.00 | JAVA0275 Serializable class has a synchronized writeObject() and no other synchronized methods | |
| JAVA0276 | 0.00 | JAVA0276 Unnecessary use of String constructor | |
| JAVA0277 | 0.00 | JAVA0277 Iterator.next() implementation does not throw NoSuchElementException | |
| JAVA0278 | 0.00 | JAVA0278 Unnecessary use of Boolean constructor | |
| JAVA0279 | 0.00 | JAVA0279 Serialization method readObject or readObjectNoData calls an overridable method | |
| JAVA0280 | 0.00 | JAVA0280 IllegalMonitorStateException caught | |
| JAVA0281 | 0.00 | JAVA0281 Iterator.next() not called in loop | |
| JAVA0282 | 0.00 | JAVA0282 Call to Iterator.next() in loop which does not test Iterator.hasNext() | |
| JAVA0283 | 0.00 | JAVA0283 Control variable not updated in loop body | |
| JAVA0284 | 0.00 | JAVA0284 Explicit garbage collection | |
| JAVA0285 | 0.00 | JAVA0285 Dereference of potentially null variable | |
| JAVA0286 | 0.00 | JAVA0286 Dereference of null variable | |
| JAVA0287 | 0.00 | JAVA0287 Unnecessary null check | |
| JAVA0288 | 0.00 | JAVA0288 Inconsistent null check | |
| LINES | 1174.00 | Number of lines in the source file | |
| LINE_COMMENT | 102.00 | Number of line comments | |
| LOC | 567.00 | Lines of code | |
| LOGICAL_LINES | 241.00 | Number of statements | |
| LOOPS | 1.00 | Number of loops | |
| NEST_DEPTH | 4.00 | Maximum nesting depth | |
| OPERANDS | 954.00 | Number of operands | |
| OPERATORS | 1737.00 | Number of operators | |
| PARAMS | 39.00 | Number of formal parameter declarations | |
| PROGRAM_LENGTH | 2691.00 | Halstead program length | |
| PROGRAM_VOCAB | 378.00 | Halstead program vocabulary | |
| PROGRAM_VOLUME | 0.00 | Halstead program volume | |
| RETURNS | 90.00 | Number of return points from functions | |
| SIZE | 31688.00 | Size of the file in bytes | |
| UNIQUE_OPERANDS | 325.00 | Number of unique operands | |
| UNIQUE_OPERATORS | 53.00 | Number of unique operators | |
| WHITESPACE | 166.00 | Number of whitespace lines | |