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vtkSQLQuery Class Referenceabstract

executes an sql query and retrieves results More...

#include <vtkSQLQuery.h>

Inheritance diagram for vtkSQLQuery:
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Collaboration diagram for vtkSQLQuery:
[legend]

Public Types

typedef vtkRowQuery Superclass
 
- Public Types inherited from vtkRowQuery
typedef vtkObject Superclass
 

Public Member Functions

virtual vtkTypeBool IsA (const char *type)
 Return 1 if this class is the same type of (or a subclass of) the named class. More...
 
vtkSQLQueryNewInstance () const
 
void PrintSelf (ostream &os, vtkIndent indent) override
 Methods invoked by print to print information about the object including superclasses. More...
 
bool IsActive () override
 Return true if the query is active (i.e. More...
 
bool Execute () override=0
 Execute the query. More...
 
virtual bool BeginTransaction ()
 Begin, commit, or roll back a transaction. More...
 
virtual bool CommitTransaction ()
 
virtual bool RollbackTransaction ()
 
virtual bool BindParameter (int index, unsigned char value)
 Bind a parameter to a placeholder in a query. More...
 
virtual bool BindParameter (int index, unsigned short value)
 
virtual bool BindParameter (int index, unsigned int value)
 
virtual bool BindParameter (int index, unsigned long value)
 
virtual bool BindParameter (int index, signed char value)
 
virtual bool BindParameter (int index, short value)
 
virtual bool BindParameter (int index, int value)
 
virtual bool BindParameter (int index, long value)
 
virtual bool BindParameter (int index, unsigned long long value)
 
virtual bool BindParameter (int index, long long value)
 
virtual bool BindParameter (int index, float value)
 
virtual bool BindParameter (int index, double value)
 
virtual bool BindParameter (int index, const char *stringValue)
 Bind a string value – string must be null-terminated. More...
 
virtual bool BindParameter (int index, const char *stringValue, size_t length)
 Bind a string value by specifying an array and a size. More...
 
virtual bool BindParameter (int index, const vtkStdString &string)
 
virtual bool BindParameter (int index, vtkVariant var)
 
virtual bool BindParameter (int index, const void *data, size_t length)
 Bind a blob value. More...
 
virtual bool ClearParameterBindings ()
 Reset all parameter bindings to nullptr. More...
 
virtual vtkStdString EscapeString (vtkStdString s, bool addSurroundingQuotes=true)
 Escape a string for inclusion into an SQL query. More...
 
char * EscapeString (const char *src, bool addSurroundingQuotes)
 Escape a string for inclusion into an SQL query. More...
 
virtual bool SetQuery (const char *query)
 The query string to be executed. More...
 
virtual const char * GetQuery ()
 The query string to be executed. More...
 
virtual vtkSQLDatabaseGetDatabase ()
 Return the database associated with the query. More...
 
- Public Member Functions inherited from vtkRowQuery
vtkRowQueryNewInstance () const
 
virtual int GetNumberOfFields ()=0
 The number of fields in the query result. More...
 
virtual const char * GetFieldName (int i)=0
 Return the name of the specified query field. More...
 
virtual int GetFieldType (int i)=0
 Return the type of the field, using the constants defined in vtkType.h. More...
 
int GetFieldIndex (const char *name)
 Return the index of the specified query field. More...
 
virtual bool NextRow ()=0
 Advance row, return false if past end. More...
 
bool NextRow (vtkVariantArray *rowArray)
 Advance row, return false if past end. More...
 
virtual vtkVariant DataValue (vtkIdType c)=0
 Return data in current row, field c. More...
 
virtual bool HasError ()=0
 Returns true if an error is set, otherwise false. More...
 
virtual const char * GetLastErrorText ()=0
 Get the last error text from the query. More...
 
virtual void SetCaseSensitiveFieldNames (bool)
 Many databases do not preserve case in field names. More...
 
virtual bool GetCaseSensitiveFieldNames ()
 Many databases do not preserve case in field names. More...
 
virtual void CaseSensitiveFieldNamesOn ()
 Many databases do not preserve case in field names. More...
 
virtual void CaseSensitiveFieldNamesOff ()
 Many databases do not preserve case in field names. More...
 
- Public Member Functions inherited from vtkObject
 vtkBaseTypeMacro (vtkObject, vtkObjectBase)
 
virtual void DebugOn ()
 Turn debugging output on. More...
 
virtual void DebugOff ()
 Turn debugging output off. More...
 
bool GetDebug ()
 Get the value of the debug flag. More...
 
void SetDebug (bool debugFlag)
 Set the value of the debug flag. More...
 
virtual void Modified ()
 Update the modification time for this object. More...
 
virtual vtkMTimeType GetMTime ()
 Return this object's modified time. More...
 
void RemoveObserver (unsigned long tag)
 
void RemoveObservers (unsigned long event)
 
void RemoveObservers (const char *event)
 
void RemoveAllObservers ()
 
vtkTypeBool HasObserver (unsigned long event)
 
vtkTypeBool HasObserver (const char *event)
 
vtkTypeBool InvokeEvent (unsigned long event)
 
vtkTypeBool InvokeEvent (const char *event)
 
std::string GetObjectDescription () const override
 The object description printed in messages and PrintSelf output. More...
 
unsigned long AddObserver (unsigned long event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
unsigned long AddObserver (const char *event, vtkCommand *, float priority=0.0f)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
vtkCommandGetCommand (unsigned long tag)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
void RemoveObserver (vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
void RemoveObservers (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
void RemoveObservers (const char *event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
vtkTypeBool HasObserver (unsigned long event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
vtkTypeBool HasObserver (const char *event, vtkCommand *)
 Allow people to add/remove/invoke observers (callbacks) to any VTK object. More...
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(), float priority=0.0f)
 Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, void(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 Overloads to AddObserver that allow developers to add class member functions as callbacks for events. More...
 
template<class U , class T >
unsigned long AddObserver (unsigned long event, U observer, bool(T::*callback)(vtkObject *, unsigned long, void *), float priority=0.0f)
 Allow user to set the AbortFlagOn() with the return value of the callback method. More...
 
vtkTypeBool InvokeEvent (unsigned long event, void *callData)
 This method invokes an event and return whether the event was aborted or not. More...
 
vtkTypeBool InvokeEvent (const char *event, void *callData)
 This method invokes an event and return whether the event was aborted or not. More...
 
virtual void SetObjectName (const std::string &objectName)
 Set/get the name of this object for reporting purposes. More...
 
virtual std::string GetObjectName () const
 Set/get the name of this object for reporting purposes. More...
 
- Public Member Functions inherited from vtkObjectBase
const char * GetClassName () const
 Return the class name as a string. More...
 
virtual vtkIdType GetNumberOfGenerationsFromBase (const char *name)
 Given the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class). More...
 
virtual void Delete ()
 Delete a VTK object. More...
 
virtual void FastDelete ()
 Delete a reference to this object. More...
 
void InitializeObjectBase ()
 
void Print (ostream &os)
 Print an object to an ostream. More...
 
void Register (vtkObjectBase *o)
 Increase the reference count (mark as used by another object). More...
 
virtual void UnRegister (vtkObjectBase *o)
 Decrease the reference count (release by another object). More...
 
int GetReferenceCount ()
 Return the current reference count of this object. More...
 
void SetReferenceCount (int)
 Sets the reference count. More...
 
bool GetIsInMemkind () const
 A local state flag that remembers whether this object lives in the normal or extended memory space. More...
 
virtual void PrintHeader (ostream &os, vtkIndent indent)
 Methods invoked by print to print information about the object including superclasses. More...
 
virtual void PrintTrailer (ostream &os, vtkIndent indent)
 Methods invoked by print to print information about the object including superclasses. More...
 
virtual bool UsesGarbageCollector () const
 Indicate whether the class uses vtkGarbageCollector or not. More...
 

Static Public Member Functions

static vtkTypeBool IsTypeOf (const char *type)
 
static vtkSQLQuerySafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkRowQuery
static vtkTypeBool IsTypeOf (const char *type)
 
static vtkRowQuerySafeDownCast (vtkObjectBase *o)
 
- Static Public Member Functions inherited from vtkObject
static vtkObjectNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 
static void BreakOnError ()
 This method is called when vtkErrorMacro executes. More...
 
static void SetGlobalWarningDisplay (vtkTypeBool val)
 This is a global flag that controls whether any debug, warning or error messages are displayed. More...
 
static void GlobalWarningDisplayOn ()
 This is a global flag that controls whether any debug, warning or error messages are displayed. More...
 
static void GlobalWarningDisplayOff ()
 This is a global flag that controls whether any debug, warning or error messages are displayed. More...
 
static vtkTypeBool GetGlobalWarningDisplay ()
 This is a global flag that controls whether any debug, warning or error messages are displayed. More...
 
- Static Public Member Functions inherited from vtkObjectBase
static vtkTypeBool IsTypeOf (const char *name)
 Return 1 if this class type is the same type of (or a subclass of) the named class. More...
 
static vtkIdType GetNumberOfGenerationsFromBaseType (const char *name)
 Given a the name of a base class of this class type, return the distance of inheritance between this class type and the named class (how many generations of inheritance are there between this class and the named class). More...
 
static vtkObjectBaseNew ()
 Create an object with Debug turned off, modified time initialized to zero, and reference counting on. More...
 
static void SetMemkindDirectory (const char *directoryname)
 The name of a directory, ideally mounted -o dax, to memory map an extended memory space within. More...
 
static bool GetUsingMemkind ()
 A global state flag that controls whether vtkObjects are constructed in the usual way (the default) or within the extended memory space. More...
 

Protected Member Functions

virtual vtkObjectBaseNewInstanceInternal () const
 
 vtkSQLQuery ()
 
 ~vtkSQLQuery () override
 
void SetDatabase (vtkSQLDatabase *db)
 Set the database associated with the query. More...
 
- Protected Member Functions inherited from vtkRowQuery
 vtkRowQuery ()
 
 ~vtkRowQuery () override
 
- Protected Member Functions inherited from vtkObject
 vtkObject ()
 
 ~vtkObject () override
 
void RegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void UnRegisterInternal (vtkObjectBase *, vtkTypeBool check) override
 
void InternalGrabFocus (vtkCommand *mouseEvents, vtkCommand *keypressEvents=nullptr)
 These methods allow a command to exclusively grab all events. More...
 
void InternalReleaseFocus ()
 These methods allow a command to exclusively grab all events. More...
 
- Protected Member Functions inherited from vtkObjectBase
 vtkObjectBase ()
 
virtual ~vtkObjectBase ()
 
virtual void ReportReferences (vtkGarbageCollector *)
 
 vtkObjectBase (const vtkObjectBase &)
 
void operator= (const vtkObjectBase &)
 

Protected Attributes

char * Query
 
vtkSQLDatabaseDatabase
 
bool Active
 
- Protected Attributes inherited from vtkRowQuery
bool CaseSensitiveFieldNames
 
- Protected Attributes inherited from vtkObject
bool Debug
 
vtkTimeStamp MTime
 
vtkSubjectHelper * SubjectHelper
 
std::string ObjectName
 
- Protected Attributes inherited from vtkObjectBase
std::atomic< int32_t > ReferenceCount
 
vtkWeakPointerBase ** WeakPointers
 

Additional Inherited Members

- Static Protected Member Functions inherited from vtkObjectBase
static vtkMallocingFunction GetCurrentMallocFunction ()
 
static vtkReallocingFunction GetCurrentReallocFunction ()
 
static vtkFreeingFunction GetCurrentFreeFunction ()
 
static vtkFreeingFunction GetAlternateFreeFunction ()
 

Detailed Description

executes an sql query and retrieves results

The abstract superclass of SQL query classes. Instances of subclasses of vtkSQLQuery are created using the GetQueryInstance() function in vtkSQLDatabase. To implement a query connection for a new database type, subclass both vtkSQLDatabase and vtkSQLQuery, and implement the required functions. For the query class, this involves the following:

Execute() - Execute the query on the database. No results need to be retrieved at this point, unless you are performing caching.

GetNumberOfFields() - After Execute() is performed, returns the number of fields in the query results.

GetFieldName() - The name of the field at an index.

GetFieldType() - The data type of the field at an index.

NextRow() - Advances the query results by one row, and returns whether there are more rows left in the query.

DataValue() - Extract a single data value from the current row.

Begin/Rollback/CommitTransaction() - These methods are optional but recommended if the database supports transactions.

Thanks:
Thanks to Andrew Wilson from Sandia National Laboratories for his work on the database classes.
See also
vtkSQLDatabase
Examples:
vtkSQLQuery (Examples)
Tests:
vtkSQLQuery (Tests)

Definition at line 59 of file vtkSQLQuery.h.

Member Typedef Documentation

◆ Superclass

Definition at line 62 of file vtkSQLQuery.h.

Constructor & Destructor Documentation

◆ vtkSQLQuery()

vtkSQLQuery::vtkSQLQuery ( )
protected

◆ ~vtkSQLQuery()

vtkSQLQuery::~vtkSQLQuery ( )
overrideprotected

Member Function Documentation

◆ IsTypeOf()

static vtkTypeBool vtkSQLQuery::IsTypeOf ( const char *  type)
static

◆ IsA()

virtual vtkTypeBool vtkSQLQuery::IsA ( const char *  name)
virtual

Return 1 if this class is the same type of (or a subclass of) the named class.

Returns 0 otherwise. This method works in combination with vtkTypeMacro found in vtkSetGet.h.

Reimplemented from vtkRowQuery.

Reimplemented in vtkSQLiteQuery, vtkPostgreSQLQuery, vtkODBCQuery, vtkMySQLQuery, and vtkQtSQLQuery.

◆ SafeDownCast()

static vtkSQLQuery* vtkSQLQuery::SafeDownCast ( vtkObjectBase o)
static

◆ NewInstanceInternal()

virtual vtkObjectBase* vtkSQLQuery::NewInstanceInternal ( ) const
protectedvirtual

◆ NewInstance()

vtkSQLQuery* vtkSQLQuery::NewInstance ( ) const

◆ PrintSelf()

void vtkSQLQuery::PrintSelf ( ostream &  os,
vtkIndent  indent 
)
overridevirtual

Methods invoked by print to print information about the object including superclasses.

Typically not called by the user (use Print() instead) but used in the hierarchical print process to combine the output of several classes.

Reimplemented from vtkRowQuery.

◆ SetQuery()

virtual bool vtkSQLQuery::SetQuery ( const char *  query)
virtual

The query string to be executed.

Since some databases will process the query string as soon as it's set, this method returns a boolean to indicate success or failure.

Reimplemented in vtkODBCQuery, vtkSQLiteQuery, and vtkMySQLQuery.

◆ GetQuery()

virtual const char* vtkSQLQuery::GetQuery ( )
virtual

The query string to be executed.

Since some databases will process the query string as soon as it's set, this method returns a boolean to indicate success or failure.

Reimplemented in vtkODBCQuery.

◆ IsActive()

bool vtkSQLQuery::IsActive ( )
inlineoverridevirtual

Return true if the query is active (i.e.

execution was successful and results are ready to be fetched). Returns false on error or inactive query.

Implements vtkRowQuery.

Definition at line 80 of file vtkSQLQuery.h.

◆ Execute()

bool vtkSQLQuery::Execute ( )
overridepure virtual

Execute the query.

This must be performed before any field name or data access functions are used.

Implements vtkRowQuery.

Implemented in vtkSQLiteQuery, vtkPostgreSQLQuery, vtkODBCQuery, vtkMySQLQuery, and vtkQtSQLQuery.

◆ BeginTransaction()

virtual bool vtkSQLQuery::BeginTransaction ( )
inlinevirtual

Begin, commit, or roll back a transaction.

If the underlying database does not support transactions these calls will do nothing.

Reimplemented in vtkSQLiteQuery, vtkPostgreSQLQuery, vtkODBCQuery, and vtkMySQLQuery.

Definition at line 94 of file vtkSQLQuery.h.

◆ CommitTransaction()

virtual bool vtkSQLQuery::CommitTransaction ( )
inlinevirtual

Reimplemented in vtkSQLiteQuery, vtkPostgreSQLQuery, vtkODBCQuery, and vtkMySQLQuery.

Definition at line 95 of file vtkSQLQuery.h.

◆ RollbackTransaction()

virtual bool vtkSQLQuery::RollbackTransaction ( )
inlinevirtual

Reimplemented in vtkSQLiteQuery, vtkPostgreSQLQuery, vtkODBCQuery, and vtkMySQLQuery.

Definition at line 96 of file vtkSQLQuery.h.

◆ GetDatabase()

virtual vtkSQLDatabase* vtkSQLQuery::GetDatabase ( )
virtual

Return the database associated with the query.

◆ BindParameter() [1/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
unsigned char  value 
)
virtual

Bind a parameter to a placeholder in a query.

A full discussion of this feature is beyond the scope of this header file, but in short, here's how it works:

Instead of saying "SELECT foo FROM mytable WHERE myfield = 12345" you can say "SELECT foo FROM mytable WHERE myfield = ?". The ? character is a placeholder for a parameter that must then be bound. Call BindParameter(0, 12345) to bind the integer value 12345 to that field. Placeholders are indexed starting at 0.

You are responsible for making sure that the types match when you call BindParameter. You don't have to get it precisely correct: in general, the SQL driver is smart enough to do things like cast a short to a long or a float to a double.

Bound parameters were introduced in ANSI SQL 92. Please see that standard for more information.

Most of these methods are excluded from wrapping because the Java wrapper treats all integer types from char up through 64-bit long as 'int'. This is incorrect behavior but what else am I going to do?

Finally, the default implementation for BindParameter(int, vtkVariant) dispatches to one of the more type-specific versions. It should be OK to use in database drivers without modification.

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [2/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
unsigned short  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [3/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
unsigned int  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [4/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
unsigned long  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [5/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
signed char  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [6/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
short  value 
)
virtual

Reimplemented in vtkSQLiteQuery.

◆ BindParameter() [7/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
int  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [8/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
long  value 
)
virtual

Reimplemented in vtkSQLiteQuery.

◆ BindParameter() [9/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
unsigned long long  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [10/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
long long  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [11/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
float  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [12/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
double  value 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [13/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
const char *  stringValue 
)
virtual

Bind a string value – string must be null-terminated.

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [14/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
const char *  stringValue,
size_t  length 
)
virtual

Bind a string value by specifying an array and a size.

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [15/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
const vtkStdString string 
)
virtual

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ BindParameter() [16/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
vtkVariant  var 
)
virtual

Reimplemented in vtkSQLiteQuery.

◆ BindParameter() [17/17]

virtual bool vtkSQLQuery::BindParameter ( int  index,
const void *  data,
size_t  length 
)
virtual

Bind a blob value.

Not all databases support blobs as a data type. Check vtkSQLDatabase::IsSupported(VTK_SQL_FEATURE_BLOB) to make sure.

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ ClearParameterBindings()

virtual bool vtkSQLQuery::ClearParameterBindings ( )
virtual

Reset all parameter bindings to nullptr.

Reimplemented in vtkSQLiteQuery, vtkODBCQuery, and vtkMySQLQuery.

◆ EscapeString() [1/2]

virtual vtkStdString vtkSQLQuery::EscapeString ( vtkStdString  s,
bool  addSurroundingQuotes = true 
)
virtual

Escape a string for inclusion into an SQL query.

If addSurroundingQuotes is true, then quotation marks appropriate to the backend database will be added to enclose the escaped string. This argument defaults to true.

A default, simple-minded implementation is provided for database backends that do not provde a way to escape strings for use inside queries.

Reimplemented in vtkMySQLQuery, and vtkPostgreSQLQuery.

◆ EscapeString() [2/2]

char* vtkSQLQuery::EscapeString ( const char *  src,
bool  addSurroundingQuotes 
)

Escape a string for inclusion into an SQL query.

This method exists to provide a wrappable version of the method that takes and returns vtkStdString objects. You are responsible for calling delete [] on the character array returned by this method. This method simply calls the vtkStdString variant and thus need not be re-implemented by subclasses.

◆ SetDatabase()

void vtkSQLQuery::SetDatabase ( vtkSQLDatabase db)
protected

Set the database associated with the query.

This is only to be called by the corresponding database class on creation of the query in GetQueryInstance().

Member Data Documentation

◆ Query

char* vtkSQLQuery::Query
protected

Definition at line 210 of file vtkSQLQuery.h.

◆ Database

vtkSQLDatabase* vtkSQLQuery::Database
protected

Definition at line 211 of file vtkSQLQuery.h.

◆ Active

bool vtkSQLQuery::Active
protected

Definition at line 212 of file vtkSQLQuery.h.


The documentation for this class was generated from the following file: