You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
269 lines
12 KiB
269 lines
12 KiB
'\" t
|
|
.TH TQSqlRecord 3qt "2 February 2007" "Trolltech AS" \" -*- nroff -*-
|
|
.\" Copyright 1992-2007 Trolltech ASA. All rights reserved. See the
|
|
.\" license file included in the distribution for a complete license
|
|
.\" statement.
|
|
.\"
|
|
.ad l
|
|
.nh
|
|
.SH NAME
|
|
TQSqlRecord \- Encapsulates a database record, i.e. a set of database fields
|
|
.SH SYNOPSIS
|
|
\fC#include <tqsqlrecord.h>\fR
|
|
.PP
|
|
Inherited by TQSqlCursor and TQSqlIndex.
|
|
.PP
|
|
.SS "Public Members"
|
|
.in +1c
|
|
.ti -1c
|
|
.BI "\fBTQSqlRecord\fR ()"
|
|
.br
|
|
.ti -1c
|
|
.BI "\fBTQSqlRecord\fR ( const TQSqlRecord & other )"
|
|
.br
|
|
.ti -1c
|
|
.BI "TQSqlRecord & \fBoperator=\fR ( const TQSqlRecord & other )"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual \fB~TQSqlRecord\fR ()"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual TQVariant \fBvalue\fR ( int i ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual TQVariant \fBvalue\fR ( const TQString & name ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBsetValue\fR ( int i, const TQVariant & val )"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBsetValue\fR ( const TQString & name, const TQVariant & val )"
|
|
.br
|
|
.ti -1c
|
|
.BI "bool \fBisGenerated\fR ( int i ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "bool \fBisGenerated\fR ( const TQString & name ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBsetGenerated\fR ( const TQString & name, bool generated )"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBsetGenerated\fR ( int i, bool generated )"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBsetNull\fR ( int i )"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBsetNull\fR ( const TQString & name )"
|
|
.br
|
|
.ti -1c
|
|
.BI "bool \fBisNull\fR ( int i ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "bool \fBisNull\fR ( const TQString & name ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "int \fBposition\fR ( const TQString & name ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "TQString \fBfieldName\fR ( int i ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "TQSqlField * \fBfield\fR ( int i )"
|
|
.br
|
|
.ti -1c
|
|
.BI "TQSqlField * \fBfield\fR ( const TQString & name )"
|
|
.br
|
|
.ti -1c
|
|
.BI "const TQSqlField * \fBfield\fR ( int i ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "const TQSqlField * \fBfield\fR ( const TQString & name ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBappend\fR ( const TQSqlField & field )"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBinsert\fR ( int pos, const TQSqlField & field )"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBremove\fR ( int pos )"
|
|
.br
|
|
.ti -1c
|
|
.BI "bool \fBisEmpty\fR () const"
|
|
.br
|
|
.ti -1c
|
|
.BI "bool \fBcontains\fR ( const TQString & name ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBclear\fR ()"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual void \fBclearValues\fR ( bool nullify = FALSE )"
|
|
.br
|
|
.ti -1c
|
|
.BI "uint \fBcount\fR () const"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual TQString \fBtoString\fR ( const TQString & prefix = TQString::null, const TQString & sep = "","" ) const"
|
|
.br
|
|
.ti -1c
|
|
.BI "virtual TQStringList \fBtoStringList\fR ( const TQString & prefix = TQString::null ) const"
|
|
.br
|
|
.in -1c
|
|
.SH DESCRIPTION
|
|
The TQSqlRecord class encapsulates a database record, i.e. a set of database fields.
|
|
.PP
|
|
The TQSqlRecord class encapsulates the functionality and characteristics of a database record (usually a table or view within the database). TQSqlRecords support adding and removing fields as well as setting and retrieving field values.
|
|
.PP
|
|
TQSqlRecord is implicitly shared. This means you can make copies of the record in time O(1). If multiple TQSqlRecord instances share the same data and one is modifying the record's data then this modifying instance makes a copy and modifies its private copy - thus it does not affect other instances.
|
|
.PP
|
|
See also TQSqlRecordInfo and Database Classes.
|
|
.SH MEMBER FUNCTION DOCUMENTATION
|
|
.SH "TQSqlRecord::TQSqlRecord ()"
|
|
Constructs an empty record.
|
|
.SH "TQSqlRecord::TQSqlRecord ( const TQSqlRecord & other )"
|
|
Constructs a copy of \fIother\fR.
|
|
.SH "TQSqlRecord::~TQSqlRecord ()\fC [virtual]\fR"
|
|
Destroys the object and frees any allocated resources.
|
|
.SH "void TQSqlRecord::append ( const TQSqlField & field )\fC [virtual]\fR"
|
|
Append a copy of field \fIfield\fR to the end of the record.
|
|
.PP
|
|
Reimplemented in TQSqlIndex.
|
|
.SH "void TQSqlRecord::clear ()\fC [virtual]\fR"
|
|
Removes all the record's fields.
|
|
.PP
|
|
See also clearValues().
|
|
.PP
|
|
Reimplemented in TQSqlCursor.
|
|
.SH "void TQSqlRecord::clearValues ( bool nullify = FALSE )\fC [virtual]\fR"
|
|
Clears the value of all fields in the record. If \fInullify\fR is TRUE, (the default is FALSE), each field is set to NULL.
|
|
.SH "bool TQSqlRecord::contains ( const TQString & name ) const"
|
|
Returns TRUE if there is a field in the record called \fIname\fR; otherwise returns FALSE.
|
|
.SH "uint TQSqlRecord::count () const"
|
|
Returns the number of fields in the record.
|
|
.SH "TQSqlField * TQSqlRecord::field ( int i )"
|
|
Returns the field at position \fIi\fR within the record, or 0 if it cannot be found.
|
|
.SH "TQSqlField * TQSqlRecord::field ( const TQString & name )"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Returns the field called \fIname\fR within the record, or 0 if it cannot be found. Field names are not case-sensitive.
|
|
.SH "const TQSqlField * TQSqlRecord::field ( int i ) const"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.SH "const TQSqlField * TQSqlRecord::field ( const TQString & name ) const"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Returns the field called \fIname\fR within the record, or 0 if it cannot be found. Field names are not case-sensitive.
|
|
.SH "TQString TQSqlRecord::fieldName ( int i ) const"
|
|
Returns the name of the field at position \fIi\fR. If the field does not exist, TQString::null is returned.
|
|
.SH "void TQSqlRecord::insert ( int pos, const TQSqlField & field )\fC [virtual]\fR"
|
|
Insert a copy of \fIfield\fR at position \fIpos\fR. If a field already exists at \fIpos\fR, it is removed.
|
|
.SH "bool TQSqlRecord::isEmpty () const"
|
|
Returns TRUE if there are no fields in the record; otherwise returns FALSE.
|
|
.SH "bool TQSqlRecord::isGenerated ( const TQString & name ) const"
|
|
Returns TRUE if the record has a field called \fIname\fR and this field is to be generated (the default); otherwise returns FALSE.
|
|
.PP
|
|
See also setGenerated().
|
|
.SH "bool TQSqlRecord::isGenerated ( int i ) const"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Returns TRUE if the record has a field at position \fIi\fR and this field is to be generated (the default); otherwise returns FALSE.
|
|
.PP
|
|
See also setGenerated().
|
|
.SH "bool TQSqlRecord::isNull ( const TQString & name ) const"
|
|
Returns TRUE if the field called \fIname\fR is NULL or if there is no field called \fIname\fR; otherwise returns FALSE.
|
|
.PP
|
|
See also position().
|
|
.SH "bool TQSqlRecord::isNull ( int i ) const"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Returns TRUE if the field \fIi\fR is NULL or if there is no field at position \fIi\fR; otherwise returns FALSE.
|
|
.PP
|
|
See also fieldName().
|
|
.SH "TQSqlRecord & TQSqlRecord::operator= ( const TQSqlRecord & other )"
|
|
Sets the record equal to \fIother\fR.
|
|
.SH "int TQSqlRecord::position ( const TQString & name ) const"
|
|
Returns the position of the field called \fIname\fR within the record, or -1 if it cannot be found. Field names are not case-sensitive. If more than one field matches, the first one is returned.
|
|
.SH "void TQSqlRecord::remove ( int pos )\fC [virtual]\fR"
|
|
Removes the field at \fIpos\fR. If \fIpos\fR does not exist, nothing happens.
|
|
.PP
|
|
Reimplemented in TQSqlCursor.
|
|
.SH "void TQSqlRecord::setGenerated ( const TQString & name, bool generated )\fC [virtual]\fR"
|
|
Sets the generated flag for the field called \fIname\fR to \fIgenerated\fR. If the field does not exist, nothing happens. Only fields that have \fIgenerated\fR set to TRUE are included in the SQL that is generated, e.g. by TQSqlCursor.
|
|
.PP
|
|
See also isGenerated().
|
|
.PP
|
|
Reimplemented in TQSqlCursor.
|
|
.SH "void TQSqlRecord::setGenerated ( int i, bool generated )\fC [virtual]\fR"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Sets the generated flag for the field \fIi\fR to \fIgenerated\fR.
|
|
.PP
|
|
See also isGenerated().
|
|
.PP
|
|
Reimplemented in TQSqlCursor.
|
|
.SH "void TQSqlRecord::setNull ( int i )\fC [virtual]\fR"
|
|
Sets the value of field \fIi\fR to NULL. If the field does not exist, nothing happens.
|
|
.SH "void TQSqlRecord::setNull ( const TQString & name )\fC [virtual]\fR"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Sets the value of the field called \fIname\fR to NULL. If the field does not exist, nothing happens.
|
|
.SH "void TQSqlRecord::setValue ( int i, const TQVariant & val )\fC [virtual]\fR"
|
|
Sets the value of the field at position \fIi\fR to \fIval\fR. If the field does not exist, nothing happens.
|
|
.PP
|
|
Examples:
|
|
.)l sql/overview/insert/main.cpp, sql/overview/insert2/main.cpp, sql/overview/subclass5/main.cpp, sql/overview/update/main.cpp, and sql/sqltable/main.cpp.
|
|
.SH "void TQSqlRecord::setValue ( const TQString & name, const TQVariant & val )\fC [virtual]\fR"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Sets the value of the field called \fIname\fR to \fIval\fR. If the field does not exist, nothing happens.
|
|
.SH "TQString TQSqlRecord::toString ( const TQString & prefix = TQString::null, const TQString & sep = "," ) const\fC [virtual]\fR"
|
|
Returns a list of all the record's field names as a string separated by \fIsep\fR.
|
|
.PP
|
|
Note that fields which are not generated are \fInot\fR included (see isGenerated()). The returned string is suitable, for example, for generating SQL SELECT statements. If a \fIprefix\fR is specified, e.g. a table name, all fields are prefixed in the form:
|
|
.PP"
|
|
\fIprefix\fR.<fieldname>"
|
|
.SH "TQStringList TQSqlRecord::toStringList ( const TQString & prefix = TQString::null ) const\fC [virtual]\fR"
|
|
Returns a list of all the record's field names, each having the prefix \fIprefix\fR.
|
|
.PP
|
|
Note that fields which have generated set to FALSE are \fInot\fR included. (See isGenerated()). If \fIprefix\fR is supplied, e.g. a table name, all fields are prefixed in the form:
|
|
.PP"
|
|
\fIprefix\fR.<fieldname>"
|
|
.SH "TQVariant TQSqlRecord::value ( int i ) const\fC [virtual]\fR"
|
|
Returns the value of the field located at position \fIi\fR in the record. If field \fIi\fR does not exist the resultant behaviour is undefined.
|
|
.PP
|
|
This function should be used with TQSqlQuerys. When working with a TQSqlCursor the value(const TQString&) overload which uses field names is more appropriate.
|
|
.PP
|
|
Example: sql/overview/update/main.cpp.
|
|
.SH "TQVariant TQSqlRecord::value ( const TQString & name ) const\fC [virtual]\fR"
|
|
This is an overloaded member function, provided for convenience. It behaves essentially like the above function.
|
|
.PP
|
|
Returns the value of the field called \fIname\fR in the record. If
|
|
field \fIname\fR does not exist the resultant behaviour is undefined.
|
|
|
|
.SH "SEE ALSO"
|
|
.BR http://doc.trolltech.com/tqsqlrecord.html
|
|
.BR http://www.trolltech.com/faq/tech.html
|
|
.SH COPYRIGHT
|
|
Copyright 1992-2007 Trolltech ASA, http://www.trolltech.com. See the
|
|
license file included in the distribution for a complete license
|
|
statement.
|
|
.SH AUTHOR
|
|
Generated automatically from the source code.
|
|
.SH BUGS
|
|
If you find a bug in Qt, please report it as described in
|
|
.BR http://doc.trolltech.com/bughowto.html .
|
|
Good bug reports help us to help you. Thank you.
|
|
.P
|
|
The definitive TQt documentation is provided in HTML format; it is
|
|
located at $TQTDIR/doc/html and can be read using TQt Assistant or with
|
|
a web browser. This man page is provided as a convenience for those
|
|
users who prefer man pages, although this format is not officially
|
|
supported by Trolltech.
|
|
.P
|
|
If you find errors in this manual page, please report them to
|
|
.BR qt-bugs@trolltech.com .
|
|
Please include the name of the manual page (tqsqlrecord.3qt) and the Qt
|
|
version (3.3.8).
|