VTK  9.2.6
vtkQtSQLQuery.h
Go to the documentation of this file.
1 /*=========================================================================
2 
3  Program: Visualization Toolkit
4  Module: vtkQtSQLQuery.h
5 
6  Copyright (c) Ken Martin, Will Schroeder, Bill Lorensen
7  All rights reserved.
8  See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
9 
10  This software is distributed WITHOUT ANY WARRANTY; without even
11  the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
12  PURPOSE. See the above copyright notice for more information.
13 
14 =========================================================================*/
15 /*-------------------------------------------------------------------------
16  Copyright 2008 Sandia Corporation.
17  Under the terms of Contract DE-AC04-94AL85000 with Sandia Corporation,
18  the U.S. Government retains certain rights in this software.
19 -------------------------------------------------------------------------*/
28 #ifndef vtkQtSQLQuery_h
29 #define vtkQtSQLQuery_h
30 
31 #include "vtkGUISupportQtSQLModule.h" // For export macro
32 #include "vtkSQLQuery.h"
33 
34 class vtkVariant;
35 class vtkQtSQLQueryInternals;
36 
37 class VTKGUISUPPORTQTSQL_EXPORT vtkQtSQLQuery : public vtkSQLQuery
38 {
39 public:
40  static vtkQtSQLQuery* New();
41  vtkTypeMacro(vtkQtSQLQuery, vtkSQLQuery);
42  void PrintSelf(ostream& os, vtkIndent indent) override;
43 
49  bool Execute() override;
50 
54  int GetNumberOfFields() override;
55 
59  const char* GetFieldName(int col) override;
60 
64  int GetFieldType(int col) override;
65 
69  bool NextRow() override;
70 
74  vtkVariant DataValue(vtkIdType c) override;
75 
79  bool HasError() override;
80 
84  const char* GetLastErrorText() override;
85 
86 protected:
87  vtkQtSQLQuery();
88  ~vtkQtSQLQuery() override;
89 
90  vtkQtSQLQueryInternals* Internals;
91  friend class vtkQtSQLDatabase;
92 
93 private:
94  // Using the convenience function internally
95  vtkSetStringMacro(LastErrorText);
96 
97  char* LastErrorText;
98 
99  vtkQtSQLQuery(const vtkQtSQLQuery&) = delete;
100  void operator=(const vtkQtSQLQuery&) = delete;
101 };
102 
103 #endif // vtkQtSQLQuery_h
void PrintSelf(ostream &os, vtkIndent indent) override
Methods invoked by print to print information about the object including superclasses.
virtual bool NextRow()=0
Advance row, return false if past end.
bool Execute() override=0
Execute the query.
virtual const char * GetFieldName(int i)=0
Return the name of the specified query field.
int vtkIdType
Definition: vtkType.h:332
A atomic type representing the union of many types.
Definition: vtkVariant.h:69
virtual bool HasError()=0
Returns true if an error is set, otherwise false.
query class associated with vtkQtSQLDatabase
Definition: vtkQtSQLQuery.h:37
a simple class to control print indentation
Definition: vtkIndent.h:39
virtual int GetNumberOfFields()=0
The number of fields in the query result.
vtkQtSQLQueryInternals * Internals
Definition: vtkQtSQLQuery.h:90
virtual int GetFieldType(int i)=0
Return the type of the field, using the constants defined in vtkType.h.
virtual vtkVariant DataValue(vtkIdType c)=0
Return data in current row, field c.
executes an sql query and retrieves results
Definition: vtkSQLQuery.h:74
virtual const char * GetLastErrorText()=0
Get the last error text from the query.
static vtkObject * New()
Create an object with Debug turned off, modified time initialized to zero, and reference counting on...
friend class vtkQtSQLQuery
maintains a connection to an sql database