These are the databases currently tested and working with the ODBC classes. A call to \helpref{wxDb::Dbms}{wxdbdbms} will return one of these enumerated values listed below.
-\begin{verbatim}
- dbmsUNIDENTIFIED
- dbmsORACLE
- dbmsSYBASE_ASA // Adaptive Server Anywhere
- dbmsSYBASE_ASE // Adaptive Server Enterprise
- dbmsMS_SQL_SERVER
- dbmsMY_SQL
- dbmsPOSTGRES
- dbmsACCESS
- dbmsDBASE
- dbmsINFORMIX
- dbmsVIRTUOSO
- dbmsDB2
- dbmdINTERBASE
-\end{verbatim}
+\begin{itemize}\itemsep=0pt
+\item DB2
+\item DBase (IV, V)**
+\item Firebird
+\item INFORMIX
+\item Interbase
+\item MS SQL Server (v7 - minimal testing)
+\item MS Access (97, 2000, 2002, and 2003)
+\item MySQL (2.x and 3.5 - use the 2.5x drivers though)
+\item Oracle (v7, v8, v8i)
+\item Pervasive SQL
+\item PostgreSQL
+\item Sybase (ASA and ASE)
+\item XBase Sequiter
+\item VIRTUOSO
+\end{itemize}
See the remarks in \helpref{wxDb::Dbms}{wxdbdbms} for exceptions/issues with each of these database engines.
\wxheading{Remarks}
Default cursor scrolling is defined by wxODBC\_FWD\_ONLY\_CURSORS in setup.h
-when the wxWindows library is built. This behavior can be overridden when
-an instance of a wxDb is created (see \helpref{wxDb constructor}{wxdbconstr}).
-Default setting of this value TRUE, as not all databases/drivers support
+when the wxWidgets library is built. This behavior can be overridden when
+an instance of a wxDb is created (see \helpref{wxDb constructor}{wxdbctor}).
+Default setting of this value true, as not all databases/drivers support
both types of cursors.
\wxheading{See also}
The wxDb instance returned is also opened (see \helpref{wxDb::Open}{wxdbopen}).
This function (along with wxDbFreeConnection() and wxDbCloseConnection())
-maintain a cached of wxDb instances for user/re-use by a program. When a
+maintain a cache of wxDb instances for user/re-use by a program. When a
program needs a wxDb instance, it may call this function to obtain a wxDb
instance. If there is a wxDb instance in the cache that is currently unused
that matches the connection requirements specified in {\it'pDbConfig'} then
\func{const wxChar *}{wxDbLogExtendedErrorMsg}{\param{const wxChar *}{userText}, \param{wxDb *}{pDb}, \param{wxChar *}{ErrFile}, \param{int }{ErrLine}}
Writes a message to the wxLog window (stdout usually) when an internal
-error situation occurs. This function only works in DEBUG builds
+error situation occurs.
\func{bool}{wxDbSqlLog}{\param{wxDbSqlLogState }{state}, \param{const wxString \&}{filename = SQL\_LOG\_FILENAME}}
available through the ODBC driver manager on the current workstation.
\begin{verbatim}
- wxStringList strList;
+ wxArrayString strArray;
while (wxDbGetDataSource(DbConnectInf.GetHenv(), Dsn, SQL_MAX_DSN_LENGTH+1, DsDesc, 255))
- strList.Add(Dsn);
+ strArray.Add(Dsn);
\end{verbatim}
\latexignore{\rtfignore{\wxheading{Members}}}
-\membersection{wxDb::wxDb}\label{wxdbconstr}
+\membersection{wxDb::wxDb}\label{wxdbctor}
\func{}{wxDb}{\void}
\wxheading{Return value}
-Returns TRUE if the catalog request was successful, or FALSE if there was some
+Returns true if the catalog request was successful, or false if there was some
reason that the catalog could not be generated.
\wxheading{Example}
\wxheading{Return value}
-Returns TRUE if the commit was successful, or FALSE if the commit failed.
+Returns true if the commit was successful, or false if the commit failed.
\wxheading{Remarks}
\begin{verbatim}
// Incomplete code sample
db.CreateView("PARTS_SD1", "PN, PD, QTY",
- "SELECT PART_NO, PART_DESC, QTY_ON_HAND * 1.1 FROM PARTS \
+ "SELECT PART_NUM, PART_DESC, QTY_ON_HAND * 1.1 FROM PARTS \
WHERE STORAGE_DEVICE = 1");
// PARTS_SD1 can now be queried just as if it were a data table.
\helpref{Enumerated types}{wxdbenumeratedtypes} section of wxDb.
There are known issues with conformance to the ODBC standards with several
-datasources supported by the wxWindows ODBC classes. Please see the overview
+datasources supported by the wxWidgets ODBC classes. Please see the overview
for specific details on which datasource have which issues.
\wxheading{Return value}
\docparam{aHdbc}{Handle to the ODBC connection. Pass this in if the ODBC
function call that erred required a hdbc or hstmt argument.}
-\docparam{aHstmt}{Handle to the ODBC statement being executed against. Pass
+\docparam{aHstmt}{Handle to the ODBC statement being executed against. Pass
this in if the ODBC function call that failed required a hstmt argument.}
\wxheading{Remarks}
\wxheading{Return value}
-The function always returns FALSE, so a call to this function can be made
+The function always returns false, so a call to this function can be made
in the return statement of a code block in the event of a failure to
perform an action (see the example below).
pDb->DispAllErrors(henv, hdbc, hstmt); // Display all other errors, if any
pDb->RollbackTrans(); // Rollback the transaction
CloseCursor(); // Close the cursor
- return(FALSE); // Return Failure
+ return(false); // Return Failure
}
}
\end{verbatim}
\wxheading{Remarks}
-If the view does not exist, this function will return TRUE. Note that views are not supported with all datasources.
+If the view does not exist, this function will return true. Note that views are not supported with all datasources.
\membersection{wxDb::ExecSql}\label{wxdbexecsql}
\func{bool}{ExecSql}{\param{const wxString \&}{pSqlStmt}}
+\func{bool}{ExecSql}{\param{const wxString \&}{pSqlStmt}, \param{wxDbColInf **}{columns}, \param{short \&}{numcols}}
+
Allows a native SQL command to be executed directly against the datasource. In addition to being able to run any standard SQL command, use of this function allows a user to (potentially) utilize features specific to the datasource they are connected to that may not be available through ODBC. The ODBC driver will pass the specified command directly to the datasource.
+To get column amount and column names or other information about returned columns, pass {\it 'columns'} and {\it 'numcols'} parameters to the function also.
+
\wxheading{Parameters}
\docparam{pSqlStmt}{Pointer to the SQL statement to be executed.}
+\docparam{columns}{On success, this function will set this pointer to point to array of \helpref{wxDbColInf}{wxdbcolinf} objects, holding information about columns returned by the query. You need to call delete[] for the pointer you pass here after you don't use it anymore to prevent memory leak.}
+
+\docparam{numcols}{Reference to variable where amount of objects in {\it 'columns'}-parameter will be set.}
+
\wxheading{Remarks}
This member extends the wxDb class and allows you to build and execute ANY VALID
\func{bool}{IsFwdOnlyCursors}{\void}
-Older form (pre-2.3/2.4 of wxWindows) of the
+Older form (pre-2.3/2.4 of wxWidgets) of the
\helpref{wxDb::IsFwdOnlyCursors}{wxdbisfwdonlycursors}. This method is
-provided for backward compatability only. The method
+provided for backward compatibility only. The method
\helpref{wxDb::IsFwdOnlyCursors}{wxdbisfwdonlycursors} should be
used in place of this method.
\membersection{wxDb::GetData}\label{wxdbgetdata}
-\func{bool}{GetData}{\param{UWORD}{ colNo}, \param{SWORD}{ cType},
+\func{bool}{GetData}{\param{UWORD}{ colNumber}, \param{SWORD}{ cType},
\param{PTR}{ pData}, \param{SDWORD}{ maxLen}, \param{SDWORD FAR *}{ cbReturned} }
Used to retrieve result set data without binding column values to memory
\wxheading{Parameters}
-\docparam{colNo}{Ordinal number of the desired column in the result set to be
+\docparam{colNumber}{Ordinal number of the desired column in the result set to be
returned.}
\docparam{cType}{The C data type that is to be returned. See a partial list
in \helpref{wxDbTable::SetColDefs}{wxdbtablesetcoldefs}}
\membersection{wxDb::GetKeyFields}\label{wxdbgetkeyfields}
-\func{int }{GetKeyFields}{\param{const wxString \&}{tableName}, \param{wxDbColInf *}{colInf}, \param{UWORD }{nocols}}
+\func{int }{GetKeyFields}{\param{const wxString \&}{tableName}, \param{wxDbColInf *}{colInf}, \param{UWORD }{numColumns}}
Used to determine which columns are members of primary or non-primary indexes on the specified table. If a column is a member of a foreign key for some other table, that information is detected also.
\docparam{tableName}{Name of the table for which the columns will be evaluated as to their inclusion in any indexes.}
\docparam{colInf}{Data structure containing the column definitions (obtained with \helpref{wxDb::GetColumns}{wxdbgetcolumns}). This function populates the PkCol, PkTableName, and FkTableName members of the colInf structure.}
-\docparam{nocols}{Number of columns defined in the instance of colInf.}
+\docparam{numColumns}{Number of columns defined in the instance of colInf.}
\wxheading{Return value}
-Currently always returns TRUE.
+Currently always returns true.
\wxheading{See also}
\wxheading{Parameters}
\docparam{aHenv}{A handle to the ODBC environment.}
-\docparam{aHdbc}{{\it OPTIONAL.} A handle to the ODBC connection. Pass this
+\docparam{aHdbc}{{\it OPTIONAL.} A handle to the ODBC connection. Pass this
in if the ODBC function call that failed required a hdbc or hstmt argument.}
-\docparam{AHstmt}{{\it OPTIONAL.}A handle to the ODBC statement being executed
-against. Pass this in if the ODBC function call that failed requires a
+\docparam{AHstmt}{{\it OPTIONAL.}A handle to the ODBC statement being executed
+against. Pass this in if the ODBC function call that failed requires a
hstmt argument.}
\wxheading{Example}
forward-only or also backward scrolling cursors is defined in setup.h by the
value of wxODBC\_FWD\_ONLY\_CURSORS. This default setting can be overridden
when the wxDb connection is initially created (see
-\helpref{wxDb constructor}{wxdbconstr} and \helpref{wxDbGetConnection}{wxdbfunctions}).
+\helpref{wxDb constructor}{wxdbctor} and \helpref{wxDbGetConnection}{wxdbfunctions}).
\wxheading{Return value}
-Returns TRUE if this datasource connection is defined as using only forward
-scrolling cursors, or FALSE if the connection is defined as being allowed to
+Returns true if this datasource connection is defined as using only forward
+scrolling cursors, or false if the connection is defined as being allowed to
use backward scrolling cursors and their associated functions (see note above).
\wxheading{Remarks}
-Added as of wxWindows v2.4 release, this function is a renamed version of
-wxDb::FwdOnlyCursors() to match the normal wxWindows naming conventions for
+Added as of wxWidgets v2.4 release, this function is a renamed version of
+wxDb::FwdOnlyCursors() to match the normal wxWidgets naming conventions for
class member functions.
This function is not available in versions prior to v2.4. You should
-use \helpref{wxDb::FwdOnlyCursors}{wxdbfwdonlycursors} for wxWindows
+use \helpref{wxDb::FwdOnlyCursors}{wxdbfwdonlycursors} for wxWidgets
versions prior to 2.4.
\wxheading{See also}
-\helpref{wxDb constructor}{wxdbconstr}, \helpref{wxDbGetConnection}{wxdbfunctions}
+\helpref{wxDb constructor}{wxdbctor}, \helpref{wxDbGetConnection}{wxdbfunctions}
\membersection{wxDb::IsOpen}\label{wxdbisopen}
the call to \helpref{wxDb::Open}{wxdbopen} may have failed to fully
initialize the connection correctly. The connection to the database
{\it is} open and can be used via the direct SQL commands, if this
-function returns TRUE. Other functions which depend on the
+function returns true. Other functions which depend on the
\helpref{wxDb::Open}{wxdbopen} to have completed correctly may not function
as expected. The return result from \helpref{wxDb::Open}{wxdbopen} is the
only way to know if complete initialization of this wxDb connection was
\membersection{wxDb::Open}\label{wxdbopen}
\func{bool}{Open}{\param{const wxString \&}{Dsn}, \param{const wxString \&}{Uid},
-\param{const wxString \&}{AuthStr}}
+\param{const wxString \&}{AuthStr}, \param{bool }{failOnDataTypeUnsupported}}
+
+\func{bool}{Open}{\param{const wxString \&}{inConnectStr},
+\param{bool }{failOnDataTypeUnsupported}}
+
+\func{bool}{Open}{\param{wxDbConnectInf *}{dbConnectInf},
+\param{bool }{failOnDataTypeUnsupported}}
\func{bool}{Open}{\param{wxDb *}{copyDb}}
objects and so on. Users and privileges are normally administered by the
database administrator.}
\docparam{AuthStr}{The password associated with the Uid.}
-\docparam{copyDb}{Already completely configured and opened datasource connection
-from which all Dsn, Uid, AuthStr, and data typing information is to be copied
-from for use by this datasource connection.}
+\docparam{failOnDataTypeUnsupporte}{As part of connecting to a database, the
+wxDb::Open() function will query the database to find out the native types
+that it supports. With some databases, some data types may not be supported,
+or not sufficiently supported, for use with the wxODBC classes. Normally
+a program should fail in this case, so as not to try to use a data type
+that is not supported. This parameter allows the programmer to override the
+failure if they wish and continue on using the connection.}
+\docparam{dbConnectInf}{Contains a DSN, Uid, Password, or a connection string
+to be used in opening a new connection to the database. If a connection
+string is present, then the connection string will be used. If there is no
+connection string present, then the DSN, Uid, and Password are used.}
+\docparam{inConnectStr}{A valid ODBC connection string used to connect to a
+database}
+\docparam{copyDb}{Already completely configured and opened datasource
+connection from which all Dsn, Uid, AuthStr, connection string, and data
+typing information is to be copied from for use by this datasource
+connection. If 'copyDb' used a connection string to create its connection
+originally, then the connection being made by this call to wxDb::Open() will
+use that same connection string.}
\wxheading{Remarks}
time to support distributed database connections by having separate instances
of wxDb objects that use either the same or different Dsn/Uid/AuthStr settings.
-If this function returns a value of FALSE, it does not necessarily mean that
+If this function returns a value of false, it does not necessarily mean that
the connection to the datasource was not opened. It may mean that some
portion of the initialization of the connection failed (such as a datatype not
being able to be determined how the datasource represents it). To determine
if the connection to the database failed, use the \helpref{wxDb::IsOpen}{wxdbisopen}
-function after receiving a FALSE result back from this function to determine if
-the connection was opened or not. If this function returns FALSE, but \helpref{wxDb::IsOpen}{wxdbisopen}
-returns TRUE, then direct SQL commands may be passed to the database
+function after receiving a false result back from this function to determine if
+the connection was opened or not. If this function returns false, but \helpref{wxDb::IsOpen}{wxdbisopen}
+returns true, then direct SQL commands may be passed to the database
connection and can be successfully executed, but use of the datatypes (such as
by a wxDbTable instance) that are normally determined during open will not be
possible.
\func{void}{SetDebugErrorMessages}{\param{bool }{state}}
-\docparam{state}{Either TRUE (debug messages are logged) or FALSE (debug
+\docparam{state}{Either true (debug messages are logged) or false (debug
messages are not logged).}
\wxheading{Remarks}
Turns on/off debug error messages from the ODBC class library. When
-this function is passed TRUE, errors are reported to the user/logged automatically
-in a text or pop-up dialog when an ODBC error occurs. When passed FALSE,
+this function is passed true, errors are reported to the user/logged automatically
+in a text or pop-up dialog when an ODBC error occurs. When passed false,
errors are silently handled.
When compiled in release mode (FINAL=1), this setting has no affect.
\wxheading{See also}
-\helpref{wxDb constructor}{wxdbconstr}
+\helpref{wxDb constructor}{wxdbctor}
\membersection{wxDb::SetSqlLogging}\label{wxdbsetsqllogging}
-\func{bool}{SetSqlLogging}{\param{wxDbSqlLogState}{ state}, \param{const wxString \&}{filename = SQL\_LOG\_FILENAME}, \param{bool }{ append = FALSE}}
+\func{bool}{SetSqlLogging}{\param{wxDbSqlLogState}{ state}, \param{const wxString \&}{filename = SQL\_LOG\_FILENAME}, \param{bool }{ append = false}}
\wxheading{Parameters}
\docparam{state}{Either sqlLogOFF or sqlLogON (see \helpref{enum wxDbSqlLogState}{wxdbcolfor}). Turns logging of SQL commands sent to the datasource OFF or ON.}
\docparam{filename}{{\it OPTIONAL}. Name of the file to which the log text is to be written. Default is SQL\_LOG\_FILENAME.}
-\docparam{append}{{\it OPTIONAL}. Whether the file is appended to or overwritten. Default is FALSE.}
+\docparam{append}{{\it OPTIONAL}. Whether the file is appended to or overwritten. Default is false.}
\wxheading{Remarks}
{\it tableName} may refer to a table, view, alias or synonym.}
\docparam{priv}{The table privilege being evaluated. May be one of the
following (or a datasource specific privilege):}
+
\begin{verbatim}
SELECT : The connected user is permitted to retrieve data for
one or more columns of the table.
example, a unique, referential, or table check
constraint).
\end{verbatim}
+
\docparam{userID}{{\it OPTIONAL.} User for which to determine if the privilege
specified to be checked is granted or not. Default is "".
{\it userID} is evaluated as follows:}
+
\begin{verbatim}
userID == NULL ... NOT ALLOWED!
userID == "" ... UserID set equal to 'this->uid'
\docparam{schema}{{\it OPTIONAL.} Owner of the table. Specify a userID when the datasource
you are connected to allows multiple unique tables with the same name to be
owned by different users. Specifying the table owner makes determination of the
-users privileges MUCH faster. Default is NULL. {\it userID} is evaluated as follows:}
+users privileges MUCH faster. Default is NULL. {\it userID} is
+evaluated as follows:}
+
\begin{verbatim}
schema == NULL ... Any owner (DEFAULT)
schema == "" ... Owned by 'this->uid'
If SQL logging is off when a call to WriteSqlLog() is made, or there is a
failure to write the log message to the log file, the function returns
-FALSE without performing the requested log, otherwise TRUE is returned.
+false without performing the requested log, otherwise true is returned.
\wxheading{See also}
instance of a wxDbTable object.
Each instance of this class describes one column in the wxDbTable
-object. When calling the \helpref{wxDb constructor}{wxdbconstr}, a
+object. When calling the \helpref{wxDb constructor}{wxdbctor}, a
parameter passed in indicates the number of columns that will be defined for
the wxDbTable object. The constructor uses this information to allocate
adequate memory for all of the column descriptions in your wxDbTable object.
\wxheading{See also}
\helpref{database classes overview}{odbcoverview},
-\helpref{wxDbTable::GetColDefs}{wxdbtablegetcoldefs}, \helpref{wxDb constructor}{wxdbconstr}
+\helpref{wxDbTable::GetColDefs}{wxdbtablegetcoldefs}, \helpref{wxDb constructor}{wxdbctor}
+
+\wxheading{Include files}
+
+<wx/db.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
\membersection{wxDbColDef::Initialize}\label{wxdbcoldefinitialize}
and floats.
\begin{verbatim}
- wxString s_Field; // Formated String for Output
- wxString s_Format[7]; // Formated Objects - TIMESTAMP has
+ wxString s_Field; // Formatted String for Output
+ wxString s_Format[7]; // Formatted Objects - TIMESTAMP has
the biggest (7)
- wxString s_Amount[7]; // Formated Objects - amount of
+ wxString s_Amount[7]; // Formatted Objects - amount of
things that can be formatted
- int i_Amount[7]; // Formated Objects -
+ int i_Amount[7]; // Formatted Objects -
TT MM YYYY HH MM SS m
int i_Nation; // 0 = timestamp
1 = EU
See the \helpref{database classes overview}{odbcoverview} for
an introduction to using the ODBC classes.
+\wxheading{Include files}
+
+<wx/db.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
\membersection{wxDbColFor::Format}\label{wxdbcolforformat}
\func{int }{Format}{\param{int }{Nation}, \param{int }{dbDataType},
See the \helpref{database classes overview}{odbcoverview} for
an introduction to using the ODBC classes.
+\wxheading{Include files}
+
+<wx/db.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
\membersection{wxDbColInf::Initialize}\label{wxdbcolinfinitialize}
Simply initializes all member variables to a cleared state. Called by
optional fields held in this class are and file type, both for future
functions planned to be added for creating/manipulating datasource definitions.
-\membersection{wxDbConnectInf::wxDbConnectInf}
+\membersection{wxDbConnectInf::wxDbConnectInf}\label{wxdbconnectinfctor}
\func{}{wxDbConnectInf}{\void}
Default constructor.
-\func{}{wxDbConnectInf}{\param{HENV }{henv}, \param{const wxString \&}{dsn},
-\param{const wxString \&}{userID=""}, \param{const wxString \&}{password},
-\param{const wxString \&}{defaultDir=""}, \param{const wxString \&}{description=""},
+\func{}{wxDbConnectInf}{\param{HENV }{henv}, \param{const wxString \&}{dsn},
+\param{const wxString \&}{userID=""}, \param{const wxString \&}{password},
+\param{const wxString \&}{defaultDir=""}, \param{const wxString \&}{description=""},
\param{const wxString \&}{fileType=""}}
Constructor which allows initial settings of all the classes member variables.
\wxheading{Parameters}
-\docparam{henv}{Environment handle used for this connection. See
+\docparam{henv}{Environment handle used for this connection. See\rtfsp
\helpref{wxDConnectInf::AllocHenv}{wxdbconnectinfallochenv} for how to create
an SQL environment handle. NOTE: Passing in a NULL for this parameter will
inform the constructor that it should create its own SQL environment handle.
-If NULL is passed for this parameter, the constructor will call
+If NULL is passed for this parameter, the constructor will call\rtfsp
\helpref{wxDConnectInf::AllocHenv}{wxdbconnectinfallochenv} internally. A
flag is set internally also to indicate that the HENV was created by the
constructor so that when the default class destructor is called, the
-destructor will call \helpref{wxDConnectInf::FreeHenv}{wxdbconnectinffreehenv}
+destructor will call \helpref{wxDConnectInf::FreeHenv}{wxdbconnectinffreehenv}\rtfsp
to free the environment handle automatically.}
\docparam{dsn}{Name of the datasource to be used in creating wxDb instances
for creating connection(s) to a datasource.}
Handles the default destruction of the instance of the class. If the long form
of the \helpref{wxDConnectInf}{wxdbconnectinf} was used, then this destructor
-also takes care of calling
+also takes care of calling\rtfsp
\helpref{wxDConnectInf::FreeHenv}{wxdbconnectinffreehenv} to free the
SQL environment handle.
\wxheading{Remarks}
-If the SQL environment handle was created using the long form of the
+If the SQL environment handle was created using the long form of the\rtfsp
\helpref{wxDbConnectInf}{wxdbconnectinf} constructor, then the flag indicating
that the HENV should be destroyed when the classes destructor is called
-is reset to be FALSE, so that any future handles created using the
+is reset to be false, so that any future handles created using the\rtfsp
\helpref{wxDbConnectInf::AllocHenv}{wxdbconnectinfallochenv} function
must be manually released with a call to this function.
See the \helpref{database classes overview}{odbcoverview} for
an introduction to using the ODBC classes.
+
+\wxheading{Include files}
+
+<wx/db.h>
+
\section{\class{wxDbInf}}\label{wxdbinf}
Contains information regarding the database connection (datasource name,
information about all tables in the datasource to have all the datasource's
information in one memory structure.
-Primarily, this class is used internally by the wxWindows ODBC classes.
+Primarily, this class is used internally by the wxWidgets ODBC classes.
\begin{verbatim}
wxChar catalog[128+1];
See the \helpref{database classes overview}{odbcoverview} for
an introduction to using the ODBC classes.
+\wxheading{Include files}
+
+<wx/db.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
\membersection{wxDbInf::Initialize}\label{wxdbinfinitialize}
Simply initializes all member variables to a cleared state. Called by
Constructs the full SQL statement that can be used to update all rows matching
the criteria in the pWhereClause.
-If typeOfUpd is DB\_UPD\_KEYFIELDS, then the current values in the bound columns
+If typeOfUpdate is DB\_UPD\_KEYFIELDS, then the current values in the bound columns
are used to determine which row(s) in the table are to be updated. The
exception to this is when a datasource supports ROW IDs (Oracle). The ROW ID
column is used for efficiency purposes when available.
\docparam{pSqlStmt}{Pointer to storage for the SQL statement retrieved. To be
sure you have adequate space allocated for the SQL statement, allocate
DB\_MAX\_STATEMENT\_LEN bytes.}
-\docparam{typeOfUpd}{The type of update statement being performed. Can be one
+\docparam{typeOfUpdate}{The type of update statement being performed. Can be one
of two values: DB\_UPD\_KEYFIELDS or DB\_UPD\_WHERE.}
-\docparam{pWhereClause}{{\it OPTIONAL}. If the typeOfUpd is DB\_UPD\_WHERE,
+\docparam{pWhereClause}{{\it OPTIONAL}. If the typeOfUpdate is DB\_UPD\_WHERE,
then you must also pass in a SQL WHERE clause in this argument. Default is "".}
\wxheading{Remarks}
and \helpref{wxDbTable::SetFromClause}{wxdbtablesetfromclause} are ignored by
this function.
-\membersection{wxDbTable::BuildWhereStmt}\label{wxdbtablebuildwherestmt}
-\func{void}{BuildSelectStmt}{\param{wxString \&}{pWhereClause},
+\membersection{wxDbTable::BuildWhereClause}\label{wxdbtablebuildwhereclause}
+
+\func{void}{BuildWhereClause}{\param{wxString \&}{pWhereClause},
\param{int }{typeOfWhere}, \param{const wxString \&}{qualTableName=""},
-\param{bool }{useLikeComparison=FALSE}}
+\param{bool }{useLikeComparison=false}}
Constructs the portion of a SQL statement which would follow the word 'WHERE'
in a SQL statement to be passed to the datasource. The returned string
\helpref{wxDbTable::SetFromClause}{wxdbtablesetfromclause},
to clarify which table a column name reference belongs to. Default is "".}
\docparam{useLikeComparison}{{\it OPTIONAL}. Should the constructed WHERE
-clause utilize the LIKE comparison operator. If FALSE, then the '='
-operator is used. Default is FALSE.}
+clause utilize the LIKE comparison operator. If false, then the '='
+operator is used. Default is false.}
\wxheading{Remarks}
containing a NULL value are not included in the WHERE clause's list of
columns to use in the comparison.
+
\membersection{wxDbTable::CanSelectForUpdate}\label{wxdbtablecanselectforupdate}
\func{bool}{CanSelectForUpdate}{\void}
this behavior or not before trying to select using "FOR UPDATE".
If the wxDbTable instance was created with the parameter wxDB\_QUERY\_ONLY, then
-this function will return FALSE. For all known databases which do not support
-the FOR UPDATE clause, this function will return FALSE also.
+this function will return false. For all known databases which do not support
+the FOR UPDATE clause, this function will return false also.
\membersection{wxDbTable::CanUpdateByROWID}\label{wxdbtablecanupdatebyrowid}
// Incomplete code sample
wxDbTable parts;
.....
- if (parts.CanUpdByROWID())
+ if (parts.CanUpdateByROWID())
{
// Note that the ROWID column must always be the last column selected
- sqlStmt = "SELECT PART_NO, PART_DESC, ROWID" FROM PARTS";
+ sqlStmt = "SELECT PART_NUM, PART_DESC, ROWID" FROM PARTS";
}
else
- sqlStmt = "SELECT PART_NO, PART_DESC FROM PARTS";
+ sqlStmt = "SELECT PART_NUM, PART_DESC FROM PARTS";
\end{verbatim}
\membersection{wxDbTable::ClearMemberVar}\label{wxdbtableclearmembervar}
-\func{void}{ClearMemberVar}{\param{UWORD }{colNo}, \param{bool }{setToNull=FALSE}}
+\func{void}{ClearMemberVar}{\param{UWORD }{colNumber}, \param{bool }{setToNull=false}}
Same as \helpref{wxDbTable::ClearMemberVars}{wxdbtableclearmembervars} except
that this function clears only the specified column of its values, and
optionally sets the column to be a NULL column.
-\docparam{colNo}{Column number that is to be cleared. This number (between 0
-and (noCols-1)) is the index of the column definition created using the
+\docparam{colNumber}{Column number that is to be cleared. This number (between 0
+and (numColumns-1)) is the index of the column definition created using the
\helpref{wxDbTable::SetColDefs}{wxdbtablesetcoldefs} function.}
\docparam{setToNull}{{\it OPTIONAL}. Indicates whether the column should be
-flagged as being a NULL value stored in the bound memory variable. If TRUE,
+flagged as being a NULL value stored in the bound memory variable. If true,
then any value stored in the bound member variable is cleared. Default is
-FALSE.}
+false.}
\membersection{wxDbTable::ClearMemberVars}\label{wxdbtableclearmembervars}
-\func{void}{ClearMemberVars}{\param{bool }{setToNull=FALSE}}
+\func{void}{ClearMemberVars}{\param{bool }{setToNull=false}}
Initializes all bound columns of the wxDbTable instance to zero. In the case
of a string, zero is copied to the first byte of the string.
\docparam{setToNull}{{\it OPTIONAL}. Indicates whether all columns should be
-flagged as having a NULL value stored in the bound memory variable. If TRUE,
+flagged as having a NULL value stored in the bound memory variable. If true,
then any value stored in the bound member variable is cleared. Default is
-FALSE.}
+false.}
\wxheading{Remarks}
\membersection{wxDbTable::CreateIndex}\label{wxdbtablecreateindex}
-\func{bool}{CreateIndex}{\param{const wxString \&}{idxName}, \param{bool }{unique},
-\param{UWORD }{noIdxCols}, \param{wxDbIdxDef *}{pIdxDefs},
-\param{bool }{attemptDrop=TRUE}}
+\func{bool}{CreateIndex}{\param{const wxString \&}{IndexName}, \param{bool }{unique},
+\param{UWORD }{numIndexColumns}, \param{wxDbIdxDef *}{pIndexDefs},
+\param{bool }{attemptDrop=true}}
This member function allows you to create secondary (non primary) indexes on
your tables. You first create your table, normally specifying a primary
\wxheading{Parameters}
-\docparam{idxName}{Name of the Index. Name must be unique within the table
+\docparam{IndexName}{Name of the Index. Name must be unique within the table
space of the datasource.}
\docparam{unique}{Indicates if this index is unique.}
-\docparam{noIdxCols}{Number of columns in the index.}
-\docparam{pIdxDefs}{A pointer to an array wxDbIdxDef structures. }
+\docparam{numIndexColumns}{Number of columns in the index.}
+\docparam{pIndexDefs}{A pointer to an array \helpref{wxDbIdxDef}{wxdbidxdef} structures. }
\docparam{attemptDrop}{{\it OPTIONAL}. Indicates if the function should try
to execute a \helpref{wxDbTable::DropIndex}{wxdbtabledropindex} on the index
-name provided before trying to create the index name. Default is TRUE.}
+name provided before trying to create the index name. Default is true.}
\wxheading{Remarks}
The first parameter, index name, must be unique and should be given a
meaningful name. Common practice is to include the table name as a prefix
in the index name (e.g. For table PARTS, you might want to call your index
-PARTS\_IDX1). This will allow you to easily view all
+PARTS\_Index1). This will allow you to easily view all
of the indexes defined for a given table grouped together alphabetically.
The second parameter indicates if the index is unique or not. Uniqueness
uniqueness.
In the third parameter, specify how many columns are in your index. This
-number must match the number of columns defined in the 'pIdxDefs' parameter.
+number must match the number of columns defined in the 'pIndexDefs' parameter.
The fourth parameter specifies which columns make up the index using the
-wxDbIdxDef structure. For each column in the index, you must specify two
+\helpref{wxDbIdxDef}{wxdbidxdef} structure. For each column in the index, you must specify two
things, the column name and the sort order (ascending / descending). See
-the example below to see how to build and pass in the wxDbIdxDef structure.
+the example below to see how to build and pass in the \helpref{wxDbIdxDef}{wxdbidxdef} structure.
The fifth parameter is provided to handle the differences in datasources as
to whether they will automatically overwrite existing indexes with the same
\begin{verbatim}
// Create a secondary index on the PARTS table
- wxDbIdxDef idxDef[2]; // 2 columns make up the index
+ wxDbIdxDef IndexDef[2]; // 2 columns make up the index
- wxStrcpy(idxDef[0].ColName, "PART_DESC"); // Column 1
- idxDef[0].Ascending = TRUE;
+ wxStrcpy(IndexDef[0].ColName, "PART_DESC"); // Column 1
+ IndexDef[0].Ascending = true;
- wxStrcpy(idxDef[1].ColName, "SERIAL_NO"); // Column 2
- idxDef[1].Ascending = FALSE;
+ wxStrcpy(IndexDef[1].ColName, "SERIAL_NO"); // Column 2
+ IndexDef[1].Ascending = false;
// Create a name for the index based on the table's name
wxString indexName;
- indexName.Printf("%s_IDX1",parts->GetTableName());
- parts->CreateIndex(indexName, TRUE, 2, idxDef);
+ indexName.Printf("%s_Index1",parts->GetTableName());
+ parts->CreateIndex(indexName, true, 2, IndexDef);
\end{verbatim}
\membersection{wxDbTable::CreateTable}\label{wxdbtablecreatetable}
-\func{bool}{CreateTable}{\param{bool }{attemptDrop=TRUE}}
+\func{bool}{CreateTable}{\param{bool }{attemptDrop=true}}
Creates a table based on the definitions previously defined for this
wxDbTable instance.
\docparam{attemptDrop}{{\it OPTIONAL}. Indicates whether the driver should
attempt to drop the table before trying to create it. Some datasources will
not allow creation of a table if the table already exists in the table space
-being used. Default is TRUE.}
+being used. Default is true.}
\wxheading{Remarks}
To delete all users with a first name of "JOHN", do the following:
-\begin{verbatim}
- 1) Clear all "columns" using wxDbTable::ClearMemberVars().
- 2) Set the FIRST_NAME column equal to "JOHN".
- 3) Call wxDbTable::DeleteMatching().
-\end{verbatim}
+\begin{enumerate}\itemsep=0pt
+\item Clear all "columns" using wxDbTable::ClearMemberVars().
+\item Set the FIRST\_NAME column equal to "JOHN".
+\item Call wxDbTable::DeleteMatching().
+\end{enumerate}
The WHERE clause is built by the ODBC class library based on all non-NULL
columns. This allows deletion of records by matching on any column(s) in
\membersection{wxDbTable::DropIndex}\label{wxdbtabledropindex}
-\func{bool}{DropIndex}{\param{const wxString \&}{idxName}}
+\func{bool}{DropIndex}{\param{const wxString \&}{IndexName}}
Allows an index on the associated table to be dropped (deleted) if the user
login has sufficient privileges to do so.
\wxheading{Parameters}
-\docparam{idxName}{Name of the index to be dropped.}
+\docparam{IndexName}{Name of the index to be dropped.}
\wxheading{Remarks}
-If the index specified in the 'idxName' parameter does not exist, an error
-will be logged, and the function will return a result of FALSE.
+If the index specified in the 'IndexName' parameter does not exist, an error
+will be logged, and the function will return a result of false.
It is not necessary to call \helpref{wxDb::CommitTrans}{wxdbcommittrans}
after executing this function.
\wxheading{Remarks}
-This function returns TRUE if the table does not exist, but only for
+This function returns true if the table does not exist, but only for
supported databases (see \helpref{wxDb::Dbms}{wxdbdbms}). If a datasource
is not specifically supported, and this function is called, the function
-will return FALSE.
+will return false.
Most datasources/ODBC drivers will delete any indexes associated with the
table automatically, and others may not. Check the documentation for your
\wxheading{Parameters}
-\docparam{From}{A comma separated list of table names that are to be outer
+\docparam{From}{A comma separated list of table names that are to be inner
joined with the base table's columns so that the joined table's columns
may be returned in the result set or used as a portion of a comparison with
the base table's columns. NOTE that the base tables name must NOT be included
\wxheading{Remarks}
This function can only be used if the datasource connection used by the
-wxDbTable instance was created with FwdOnlyCursors set to FALSE. If the
+wxDbTable instance was created with FwdOnlyCursors set to false. If the
connection does not allow backward scrolling cursors, this function will
-return FALSE, and the data contained in the bound columns will be undefined.
+return false, and the data contained in the bound columns will be undefined.
\wxheading{See also}
\wxheading{Remarks}
This function can only be used if the datasource connection used by the
-wxDbTable instance was created with FwdOnlyCursors set to FALSE. If the
+wxDbTable instance was created with FwdOnlyCursors set to false. If the
connection does not allow backward scrolling cursors, this function will
-return FALSE, and the data contained in the bound columns will be undefined.
+return false, and the data contained in the bound columns will be undefined.
\wxheading{See also}
\membersection{wxDbTable::GetNewCursor}\label{wxdbtablegetnewcursor}
-\func{HSTMT *}{GetNewCursor}{\param{bool }{setCursor=FALSE},
-\param{bool }{bindColumns=TRUE}}
+\func{HSTMT *}{GetNewCursor}{\param{bool }{setCursor=false},
+\param{bool }{bindColumns=true}}
This function will create a new cursor that can be used to access the table
being referenced by this wxDbTable instance, or to execute direct SQL commands
\wxheading{Parameters}
\docparam{setCursor}{{\it OPTIONAL}. Should this new cursor be set to be the
-current cursor after successfully creating the new cursor. Default is FALSE.}
+current cursor after successfully creating the new cursor. Default is false.}
\docparam{bindColumns}{{\it OPTIONAL}. Should this new cursor be bound to all
-the memory variables that the default cursor is bound to. Default is TRUE.}
+the memory variables that the default cursor is bound to. Default is true.}
\wxheading{Remarks}
\wxheading{Return value}
-This function returns FALSE when the current cursor has reached the end of
-the result set. When FALSE is returned, data in the bound columns is
+This function returns false when the current cursor has reached the end of
+the result set. When false is returned, data in the bound columns is
undefined.
\wxheading{Remarks}
\wxheading{Return value}
-This function returns FALSE when the current cursor has reached the beginning
+This function returns false when the current cursor has reached the beginning
of the result set and there are now other rows prior to the cursors current
-position. When FALSE is returned, data in the bound columns is undefined.
+position. When false is returned, data in the bound columns is undefined.
\wxheading{Remarks}
This function can only be used if the datasource connection used by the
-wxDbTable instance was created with FwdOnlyCursors set to FALSE. If the
+wxDbTable instance was created with FwdOnlyCursors set to false. If the
connection does not allow backward scrolling cursors, this function will
-return FALSE, and the data contained in the bound columns will be undefined.
+return false, and the data contained in the bound columns will be undefined.
\wxheading{See also}
{
case DB_SUCCESS:
parts->GetDb()->CommitTrans();
- return(TRUE);
+ return(true);
case DB_ERR_INTEGRITY_CONSTRAINT_VIOL:
// Current data would result in a duplicate key
// on one or more indexes that do not allow duplicates
parts->GetDb()->RollbackTrans();
- return(FALSE);
+ return(false);
default:
// Insert failed for some unexpected reason
parts->GetDb()->RollbackTrans();
- return(FALSE);
+ return(false);
}
\end{verbatim}
\membersection{wxDbTable::IsColNull}\label{wxdbtableiscolnull}
-\func{bool }{IsColNull}{\param{UWORD }{colNo}} const
+\func{bool }{IsColNull}{\param{UWORD }{colNumber}} const
Used primarily in the ODBC class library to determine if a column value is
set to "NULL". Works for all data types supported by the ODBC class library.
\wxheading{Parameters}
-\docparam{colNo}{The column number of the bound column as defined by the
+\docparam{colNumber}{The column number of the bound column as defined by the
\helpref{wxDbTable::SetColDefs}{wxdbtablesetcoldefs}
calls which defined the columns accessible to this wxDbTable instance.}
\wxheading{Remarks}
-NULL column support is currently not fully implemented as of wxWindows 2.4.
+NULL column support is currently not fully implemented as of wxWidgets 2.4.
\membersection{wxDbTable::IsCursorClosedOnCommit}\label{wxdbtableiscursorclosedoncommit}
\wxheading{Return value}
-Returns TRUE if the cursor associated with this wxDbTable object is closed
-after a commit or rollback operation. Returns FALSE otherwise.
+Returns true if the cursor associated with this wxDbTable object is closed
+after a commit or rollback operation. Returns false otherwise.
\wxheading{Remarks}
If more than one wxDbTable instance used the same database connection, all cursors
which use the database connection are closed on the commit if this function
-indicates TRUE.
+indicates true.
\membersection{wxDbTable::IsQueryOnly}\label{wxdbtableisqueryonly}
Accessor function that returns a value indicating if this wxDbTable instance
was created to allow only queries to be performed on the bound columns. If
-this function returns TRUE, then no actions may be performed using this
+this function returns true, then no actions may be performed using this
wxDbTable instance that would modify (insert/delete/update) the table's data.
\membersection{wxDbTable::Open}\label{wxdbtableopen}
-\func{bool }{Open}{\param{bool }{checkPrivileges=FALSE}, \param{bool }{checkTableExists=TRUE}}
+\func{bool }{Open}{\param{bool }{checkPrivileges=false}, \param{bool }{checkTableExists=true}}
Every wxDbTable instance must be opened before it can be used. This function
checks for the existence of the requested table, binds columns, creates required
constructs the insert statement that is to be used for inserting data as a new
row in the datasource.
+NOTE: To retrieve data into an opened table, the of the table must be bound
+to the variables in the program via call(s) to
+\helpref{wxDbTable::SetColDefs}{wxdbtablesetcoldefs} before calling Open().
+
+See the \helpref{database classes overview}{odbcoverview} for
+an introduction to using the ODBC classes.
+
\wxheading{Parameters}
\docparam{checkPrivileges}{Indicates whether the Open() function should check
whether the current connected user has at least SELECT privileges to access the
-table to which they are trying to open. Default is FALSE.}
+table to which they are trying to open. Default is false.}
\docparam{checkTableExists}{Indicates whether the Open() function should check
-whether the table exists in the database or not before opening it. Default is TRUE.}
+whether the table exists in the database or not before opening it. Default is true.}
\wxheading{Remarks}
-If the function returns a FALSE value due to the table not existing, a log
+If the function returns a false value due to the table not existing, a log
entry is recorded for the datasource connection indicating the problem
that was detected when checking for table existence. Note that it is usually
best for the calling routine to check for the existence of the table and for
-sufficent user privileges to access the table in the mode (wxDB\_QUERY\_ONLY or
+sufficient user privileges to access the table in the mode (wxDB\_QUERY\_ONLY or
!wxDB\_QUERY\_ONLY) before trying to open the table for the best possible
explanation as to why a table cannot be opened.
\helpref{wxDb::TableExists}{wxdbtableexists},
\helpref{wxDb::TablePrivileges}{wxdbtableprivileges}
+\helpref{wxDbTable::SetColDefs}{wxdbtablesetcoldefs}
\membersection{wxDbTable::OrderBy}\label{wxdbtableorderby}
\membersection{wxDbTable::Query}\label{wxdbtablequery}
-\func{virtual bool }{Query}{\param{bool }{forUpdate=FALSE}, \param{bool }{distinct=FALSE}}
+\func{virtual bool }{Query}{\param{bool }{forUpdate=false}, \param{bool }{distinct=false}}
\wxheading{Parameters}
as they are retrieved. If the RDBMS is not capable of the FOR UPDATE clause,
this argument is ignored. See
\helpref{wxDbTable::CanSelectForUpdate}{wxdbtablecanselectforupdate} for
-additional information regarding this argument. Default is FALSE.}
+additional information regarding this argument. Default is false.}
\docparam{distinct}{{\it OPTIONAL}. Allows selection of only distinct values
from the query (SELECT DISTINCT ... FROM ...). The notion of DISTINCT
applies to all columns returned in the result set, not individual columns.
-Default is FALSE.}
+Default is false.}
\wxheading{Remarks}
Use \helpref{wxDbTable::SetOrderByClause}{wxdbtablesetorderbyclause} to
change the sequence in which records are returned in the result set from
the datasource (e.g. Ordered by LAST\_NAME). Use
-\helpref{wxDbTable::SetFromClause}{wxdbtablesetfromclause} to allow outer
+\helpref{wxDbTable::SetFromClause}{wxdbtablesetfromclause} to allow inner
joining of the base table (the one being associated with this instance of
wxDbTable) with other tables which share a related field.
The requirements of the SELECT statement are the following:
-\begin{verbatim}
- 1. Must return the correct number of columns. In the derived
- wxDbTable constructor, it is specified how many columns are in
- the wxDbTable object. The SELECT statement must return exactly
- that many columns.
-
- 2. The columns must be returned in the same sequence as specified
- when defining the bounds columns using wxDbTable::SetColDefs(),
- and the columns returned must be of the proper data type. For
- example, if column 3 is defined in the wxDbTable bound column
- definitions to be a float, the SELECT statement must return a
- float for column 3 (e.g. PRICE * 1.10 to increase the price by
- 10%).
-
- 3. The ROWID can be included in your SELECT statement as the {\bf last}
- column selected, if the datasource supports it. Use
- wxDbTable::CanUpdByROWID() to determine if the ROWID can be
- selected from the datasource. If it can, much better
- performance can be achieved on updates and deletes by including
- the ROWID in the SELECT statement.
-\end{verbatim}
+\begin{enumerate}
+\item Must return the correct number of columns. In the derived
+wxDbTable constructor, it is specified how many columns are in
+the wxDbTable object. The SELECT statement must return exactly
+that many columns.
+\item The columns must be returned in the same sequence as specified
+when defining the bounds columns \helpref{wxDbTable::SetColDefs}{wxdbtablesetcoldefs},
+and the columns returned must be of the proper data type. For
+example, if column 3 is defined in the wxDbTable bound column
+definitions to be a float, the SELECT statement must return a
+float for column 3 (e.g. PRICE * 1.10 to increase the price by
+10%).
+\item The ROWID can be included in your SELECT statement as the {\bf last}
+column selected, if the datasource supports it. Use
+wxDbTable::CanUpdateByROWID() to determine if the ROWID can be
+selected from the datasource. If it can, much better
+performance can be achieved on updates and deletes by including
+the ROWID in the SELECT statement.
+\end{enumerate}
Even though data can be selected from multiple tables (joins) in your select
statement, only the base table associated with this wxDbTable object
----------------------
// Table Join returning 3 columns
- SELECT part_no, part_desc, sd_name
+ SELECT PART_NUM, part_desc, sd_name
from parts, storage_devices
where parts.storage_device_id =
storage_devices.storage_device_id
SELECT count(*) from PARTS where container = 99
// Order by clause; ROWID, scalar function
- SELECT part_no, substring(part_desc, 1, 10), qty_on_hand + 1, ROWID
+ SELECT PART_NUM, substring(part_desc, 1, 10), qty_on_hand + 1, ROWID
from parts
where warehouse = 10
- order by part_no desc // descending order
+ order by PART_NUM desc // descending order
// Subquery
SELECT * from parts
\membersection{wxDbTable::QueryMatching}\label{wxdbtablequerymatching}
-\func{virtual bool }{QueryMatching}{\param{bool }{forUpdate=FALSE},
-\param{bool }{distinct=FALSE}}
+\func{virtual bool }{QueryMatching}{\param{bool }{forUpdate=false},
+\param{bool }{distinct=false}}
QueryMatching allows querying of records from the table associated with
the wxDbTable object by matching "columns" to values.
as they are queried (SELECT ... FOR UPDATE). If the RDBMS is not capable of
the FOR UPDATE clause, this argument is ignored. See
\helpref{wxDbTable::CanSelectForUpdate}{wxdbtablecanselectforupdate} for
-additional information regarding this argument. Default is FALSE.}
+additional information regarding this argument. Default is false.}
\docparam{distinct}{{\it OPTIONAL}. Allows selection of only distinct values
from the query (SELECT DISTINCT ... FROM ...). The notion of DISTINCT
applies to all columns returned in the result set, not individual columns.
-Default is FALSE.}
+Default is false.}
\wxheading{Remarks}
// Incomplete code sample
parts->ClearMemberVars(); // Set all columns to zero
wxStrcpy(parts->PartNumber,"32"); // Set columns to query on
- parts->OnHold = TRUE;
+ parts->OnHold = true;
parts->QueryMatching(); // Query
// Display all records queried
while(parts->GetNext())
\membersection{wxDbTable::QueryOnKeyFields}\label{wxdbtablequeryonkeyfields}
-\func{bool }{QueryOnKeyFields}{\param{bool }{forUpdate=FALSE},
-\param{bool }{distinct=FALSE}}
+\func{bool }{QueryOnKeyFields}{\param{bool }{forUpdate=false},
+\param{bool }{distinct=false}}
QueryOnKeyFields provides an easy mechanism to query records in the table
associated with the wxDbTable object by the primary index column(s). Simply
as they are queried (SELECT ... FOR UPDATE). If the RDBMS is not capable of
the FOR UPDATE clause, this argument is ignored. See
\helpref{wxDbTable::CanSelectForUpdate}{wxdbtablecanselectforupdate} for
-additional information regarding this argument. Default is FALSE.}
+additional information regarding this argument. Default is false.}
\docparam{distinct}{{\it OPTIONAL}. Allows selection of only distinct values
from the query (SELECT DISTINCT ... FROM ...). The notion of DISTINCT
applies to all columns returned in the result set, not individual columns.
-Default is FALSE.}
+Default is false.}
\wxheading{Remarks}
\membersection{wxDbTable::SetColDefs}\label{wxdbtablesetcoldefs}
-\func{void}{SetColDefs}{\param{UWORD }{index}, \param{const wxString \&}{fieldName},
+\func{bool}{SetColDefs}{\param{UWORD }{index}, \param{const wxString \&}{fieldName},
\param{int }{dataType}, \param{void *}{pData}, \param{SWORD }{cType},
-\param{int }{size}, \param{bool }{keyField = FALSE}, \param{bool }{upd = TRUE},
-\param{bool }{insAllow = TRUE}, \param{bool }{derivedCol = FALSE}}
+\param{int }{size}, \param{bool }{keyField = false}, \param{bool }{updateable = true},
+\param{bool }{insertAllowed = true}, \param{bool }{derivedColumn = false}}
\func{wxDbColDataPtr *}{SetColDefs}{\param{wxDbColInf *}{colInfs}, \param{UWORD }{numCols}}
Other valid types are available also, but these are the most common ones:}
\begin{verbatim}
- SQL_C_CHAR // strings
+ SQL_C_CHAR // string - deprecated: use SQL_C_WXCHAR
+ SQL_C_WXCHAR // string - Used transparently in unicode or non-unicode builds
SQL_C_LONG
SQL_C_ULONG
SQL_C_SHORT
\docparam{size}{Maximum size in bytes of the {\it pData} object.}
\docparam{keyField}{{\it OPTIONAL}. Indicates if this column is part of the
-primary index. Default is FALSE.}
-\docparam{upd}{{\it OPTIONAL}. Are updates allowed on this column?
-Default is TRUE.}
-\docparam{insAllow}{{\it OPTIONAL}. Inserts allowed on this column?
-Default is TRUE.}
-\docparam{derivedCol}{{\it OPTIONAL}. Is this a derived column (non-base
-table column for query only)? Default is FALSE.}
+primary index. Default is false.}
+\docparam{updateable}{{\it OPTIONAL}. Are updates allowed on this column?
+Default is true.}
+\docparam{insertAllowed}{{\it OPTIONAL}. Inserts allowed on this column?
+Default is true.}
+\docparam{derivedColumn}{{\it OPTIONAL}. Is this a derived column (non-base
+table column for query only)? Default is false.}
\docparam{colInfs}{Pointer to an array of wxDbColInf instances which contains
all the information necessary to create {\it numCols} column definitions.}
If {\it pData} is to hold a string of characters, be sure to include enough
space for the NULL terminator in pData and in the byte count of {\it size}.
+Using the first form of this function, if the column definition is not able
+to be created, a value of false is returned. If the specified index of the
+column exceeds the number of columns defined in the wxDbTable instance, an
+assert is thrown and logged (in debug builds) and a false is returned.
+
+A failure to create the column definition in the second form results in a
+value of NULL being returned.
+
Both forms of this function provide a shortcut for defining the columns in
your wxDbTable object. Use this function in any derived wxDbTable
constructor when describing the column/columns in the wxDbTable object.
\begin{verbatim}
// Long way not using this function
- wxStrcpy(colDefs[0].ColName, "PART_NO");
+ wxStrcpy(colDefs[0].ColName, "PART_NUM");
colDefs[0].DbDataType = DB_DATA_TYPE_VARCHAR;
colDefs[0].PtrDataObj = PartNumber;
- colDefs[0].SqlCtype = SQL_C_CHAR;
+ colDefs[0].SqlCtype = SQL_C_WXCHAR;
colDefs[0].SzDataObj = PART_NUMBER_LEN;
- colDefs[0].KeyField = TRUE;
- colDefs[0].Updateable = FALSE;
- colDefs[0].InsertAllowed= TRUE;
- colDefs[0].DerivedCol = FALSE;
+ colDefs[0].KeyField = true;
+ colDefs[0].Updateable = false;
+ colDefs[0].InsertAllowed= true;
+ colDefs[0].DerivedCol = false;
// Shortcut using this function
- SetColDefs(0, "PART_NUMBER", DB_DATA_TYPE_VARCHAR, PartNumber,
- SQL_C_CHAR, PART_NUMBER_LEN, TRUE, FALSE,TRUE,FALSE);
+ SetColDefs(0, "PART_NUM", DB_DATA_TYPE_VARCHAR, PartNumber,
+ SQL_C_WXCHAR, PART_NUMBER_LEN, true, false, true, false);
\end{verbatim}
\membersection{wxDbTable::SetCursor}\label{wxdbtablesetcursor}
-\func{bool}{SetCursor}{\param{HSTMT *}{hstmtActivate = (void **) wxDB\_DEFAULT\_CURSOR}}
+\func{void}{SetCursor}{\param{HSTMT *}{hstmtActivate = (void **) wxDB\_DEFAULT\_CURSOR}}
\wxheading{Parameters}
\func{void}{SetFromClause}{\param{const wxString \&}{From}}
Accessor function for setting the private class member wxDbTable::from
-that indicates what other tables should be outer joined with the wxDbTable's
+that indicates what other tables should be inner joined with the wxDbTable's
base table for access to the columns in those other tables.
Synonym to this function is one form of \helpref{wxDbTable::From}{wxdbtablefrom}
\wxheading{Parameters}
-\docparam{From}{A comma separated list of table names that are to be outer
+\docparam{From}{A comma separated list of table names that are to be inner
joined with the base table's columns so that the joined table's columns
may be returned in the result set or used as a portion of a comparison with
the base table's columns. NOTE that the base tables name must NOT be included
\wxheading{Remarks}
Used by the \helpref{wxDbTable::Query}{wxdbtablequery} and
-\helpref{wxDbTable::Count}{wxdbtablecount} member functions to allow outer
+\helpref{wxDbTable::Count}{wxdbtablecount} member functions to allow inner
joining of records from multiple tables.
Do {\bf not} include the keyword "FROM" when setting the FROM clause.
\begin{verbatim}
...
// Base table is the "LOCATION" table, and it is being
- // outer joined to the "PART" table via the the field "PART_NUMBER"
+ // inner joined to the "PART" table via the field "PART_NUMBER"
// that can be related between the two tables.
location->SetWhereClause("LOCATION.PART_NUMBER = PART.PART_NUMBER")
location->SetFromClause("PART");
\membersection{wxDbTable::SetColNull}\label{wxdbtablesetcolnull}
-\func{bool}{SetColNull}{\param{UWORD }{colNo}, \param{bool }{set=TRUE}}
+\func{bool}{SetColNull}{\param{UWORD }{colNumber}, \param{bool }{set=true}}
\func{bool}{SetColNull}{\param{const wxString \&}{colName},
-\param{bool }{set=TRUE}}
+\param{bool }{set=true}}
Both forms of this function allow a member variable representing a column
in the table associated with this wxDbTable object to be set to NULL.
\wxheading{Parameters}
-\docparam{colNo}{Index into the column definitions used when first defining
+\docparam{colNumber}{Index into the column definitions used when first defining
this wxDbTable object.}
\docparam{colName}{Actual data table column name that is to be set to NULL.}
-\docparam{set}{Whether the column is set to NULL or not. Passing TRUE sets
-the column to NULL, passing FALSE sets the column to be non-NULL. Default is
-TRUE.}
+\docparam{set}{Whether the column is set to NULL or not. Passing true sets
+the column to NULL, passing false sets the column to be non-NULL. Default is
+true.}
\wxheading{Remarks}
// Using parameters and multiple logical combinations
parts->Where("((QTY > 10) OR (ON_ORDER > 0)) AND ON_HOLD = 0");
...
- // This query uses an outer join (requiring a FROM clause also)
+ // This query uses an inner join (requiring a FROM clause also)
// that joins the PART and LOCATION table on he common field
// PART_NUMBER.
parts->Where("PART.ON_HOLD = 0 AND \
rows which match the criteria specified in the {\it pWhereClause}.
All columns that are bound to member variables for this wxDbTable instance
-that were defined with the "updateable" parameter set to TRUE will be updated
+that were defined with the "updateable" parameter set to true will be updated
with the information currently held in the memory variable.
\wxheading{Parameters}
See the \helpref{database classes overview}{odbcoverview} for
an introduction to using the ODBC classes.
+\wxheading{Include files}
+
+<wx/db.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
\membersection{wxDbTableInf::Initialize}\label{wxdbtableinfinitialize}
Simply initializes all member variables to a cleared state. Called by
the constructor automatically.
+\section{\class{wxDbGridColInfo}}\label{wxdbgridcolinfo}
+
+This class is used to define columns to be shown, names of the columns,
+order and type of data, when using \helpref{wxdbGridTableBase}{wxdbgridtablebase} to display
+a Table or query in a \helpref{wxGrid}{wxgrid}
+
+See the database grid example in \helpref{wxDbGridTableBase}{wxdbgridtablebase} for
+an introduction to using the wxDbGrid classes.
+
+\wxheading{Include files}
+
+<wx/dbgrid.h>
+
+\latexignore{\rtfignore{\wxheading{Members}}}
+
+\membersection{wxDbGridColInfo::wxDbGridColInfo}\label{wxdbgridcolinfoctor}
+
+\func{}{wxDbGridColInfo}{\param{int }{colNumber}, \param{wxString }{type},
+ \param{wxString }{title}, \param{wxDbGridColInfo *}{next}}
+
+Default constructor. See the database grid example in \helpref{wxDbGridTableBase}{wxdbgridtablebase} to
+see two different ways for adding columns.
+
+
+\wxheading{Parameters}
+
+\docparam{colNumber}{Column number in the \helpref{wxDbTable}{wxdbtable} instance to be used (first column is 0).}
+\docparam{type}{Column type ,wxString specifying the grid name for the datatype in this column, or
+ use wxGRID\_VALUE\_DBAUTO to determine the type automatically from the \helpref{wxDbColDef}{wxdbcoldef} definition}
+\docparam{title}{The column label to be used in the grid display}
+\docparam{next}{A pointer to the next wxDbGridColInfo structure if using one-step
+construction, NULL terminates the list. Use Null also if using two step construction.}
+See the database grid example in \helpref{wxDbGridTableBase}{wxdbgridtablebase} to
+see two different ways for adding columns.
+
+\membersection{wxDbGridColInfo::\destruct{wxDbGridColInfo}}\label{wxdbgridcolinfodtor}
+
+\func{}{\destruct{wxDbGridColInfo}}{}
+
+Destructor.
+
+\membersection{wxDbGridColInfo::AddColInfo}\label{wxdbgridcolinfoaddcolinfo}
+
+\func{void}{AddColInfo}{\param{int }{colNumber},
+\param{wxString }{type}, \param{wxString }{title}}
+
+Use this member function for adding columns. See the database
+grid example in \helpref{wxDbGridTableBase}{wxdbgridtablebase} to
+see two different ways for adding columns.
+
+It is important to note that this class is merely a specifier to the \helpref{wxDbGridTableBase}{wxdbgridtablebase}
+constructor. Changes made to this datatype after the \helpref{wxDbGridTableBase}{wxdbgridtablebase} is called will
+not have any effect.
+
+\wxheading{Parameters}
+\docparam{colNumber}{Column number in the \helpref{wxDbTable}{wxdbtable} instance to be used (first column is 0).}
+\docparam{type}{Column type ,wxString specifying the grid name for the datatype in this column, or
+ use wxGRID\_VALUE\_DBAUTO to determine the type automatically from the \helpref{wxDbColDef}{wxdbcoldef} definition}
+\docparam{title}{The column label to be used in the grid display}
+
+\wxheading{Remarks}
+
+As wxDbTable must be defined with to have columns which match those to by a wxDbGridColInfo
+info structure as this is the structure which informs the grid of how you want to display your
+\helpref{wxDbTable}{wxdbtable}. If no datatype conversion or the referenced column number does not exist the
+the behavior is undefined.
+
+See the example at \helpref{wxDbGridColInfo::wxDbGridColInfo}{wxdbgridcolinfoctor}.
+
+\section{\class{wxDbGridTableBase}}\label{wxdbgridtablebase}
+
+You can view a database table in a grid using this class.
+
+If you are deriving your own wxDbTable subclass for your table , then you may consider
+overriding GetCol() and SetCol() to provide calculated fields. This does work but care should
+be taken when using wxDbGridTableBase in this way.
+
+The constructor and AssignDbTable() call allows you to specify the ownership if the wxDbTable
+object pointer. If you tell wxGridTableBase to take ownership , it will delete the passed wxDbTable
+when an new on is assigned or wxGridTableBase's destructor is called.
+However no checks for aliasing are done so Assign(table,..,true); Assign(table,..,true);
+is an error. If you need to requery an table object the preferred way is
+that the client keeps ownership.
+
+\wxheading{Derived From}
+
+\helpref{wxGridTableBase}{wxgridtablebase}
+
+\wxheading{Include files}
+
+<wx/dbgrid.h>
+
+
+\wxheading{Example}
+
+\begin{verbatim}
+ // First step, let's define wxDbTable
+ int numColumns = 2;
+ wxDbTable *table = new wxDbTable (db, tblName, numColumns);
+ int int_var;
+ wxChar string_name[255];
+ table->SetColDef (0, "column 0", DB_DATA_TYPE_INTEGER, &int_var,
+ SQL_C_LONG, sizeof(int_var), true);
+ table->SetColDef (1, "column 1", DB_DATA_TYPE_VARCHAR, &string_name,
+ SQL_C_LONG, sizeof(string_name), false);
+
+ // now let's define columns in the grid
+
+ // first way to do it
+ wxDbGridColInfo *columns;
+ columns = new wxDbGridColInfo(0, wxGRID_VALUE_LONG, "first column",
+ new wxDbGridColInfo(1, wxGRID_VALUE_STRING, "second column",
+ NULL);
+
+ // second way to do it
+ wxDbGridColInfo *columns;
+ // first column is special
+ columns = new wxDbGridColInfo(0, wxGRID_VALUE_LONG, "first column", NULL);
+ // all the rest
+ columns->AddColInfo (1, wxGRID_VALUE_STRING, "second column");
+
+ // second way may be better when columns are not known at compile time
+
+ // now, let's open the table and make a Query()
+ table->Open();
+ // this step is very important
+ table->SetRowMode (wxDbTable::WX_ROW_MODE_QUERY);
+ // in the grid we will see only the rows of the result query
+ m_dbTable->Query();
+
+ wxDbGridTableBase *dbgrid = new wxDbGridTableBase(table, columns, wxUSE_QUERY, true);
+ delete columns; // not needed anymore
+ wxGrid *grid = new wxGrid ( ... );
+ grid->SetTable(dbgrid, true);
+ grid->Fit();
+\end{verbatim}
+
+
+\wxheading{Include files}
+
+<wx/dbgrid.h>
+
+\wxheading{Helper classes and data structures}
+
+\membersection{wxDbGridTableBase::wxDbGridTableBase}\label{wxdbgridtablebaseconstr}
+
+\func{}{wxDbGridTableBase}{\param{wxDbTable *}{tab}, \param{wxDbGridColInfo *}{ColInfo},
+ \param{int }{count = wxUSE\_QUERY}, \param{bool }{takeOwnership = true}}
+
+Constructor.
+
+\wxheading{Parameters}
+
+\docparam{tab}{ The database table you want to display. Must be opened and queried before display the grid.
+See the example \helpref{above}{wxdbgridtablebase}.}
+\docparam{ColInfo}{ Columns titles, and other values. See \helpref{wxDbGridColInfo}{wxdbgridcolinfo}.}
+\docparam{count}{You can use a query result set (wxUSE\_QUERY, to use wxDbTable::Count(wxDbTable::Count()
+ or you can fix the total number of rows (count >= 0) to display, or specify it if you already know the size in avoid calling }
+
+\docparam{takeOwnership}{ If true, this class deletes wxDbTable when it stops
+referring to it, if false application must
+take care of deleting it. }
+
+\membersection{wxDbGridTableBase::ValidateRow}\label{wxdbgridtablebasevalidate}
+
+\func{void}{ValidateRow}{\param{int }{row}}
+
+It ensures that the row data is fetched from the database, and it the wxDbTable local buffer,
+the row number passed should be the grid row.
+
+\wxheading{Parameters}
+
+\docparam{row}{ Row where validation must be done. }
+
+\membersection{wxDbGridTableBase::UpdateRow}\label{wxdbgridtablebaseupdaterow}
+
+\func{bool}{UpdateRow}{\param{int }{row}}
+
+If row has changed it forces that row to be written back to the database, however support
+for detecting whether insert/update is required is currently not in wxDbTable, so this
+function is currently unsupported.
+
+\wxheading{Parameters}
+
+\docparam{row}{ Row you want to update. }
+
+\membersection{wxDbGridTableBase::AssignDbTable}\label{wxdbgridtablebaseassigndbtable}
+
+\func{bool}{AssignDbTable}{\param{wxDbTable *}{tab},\param{int }{count = wxUSE\_QUERY},
+\param{bool }{takeOwnership = true}}
+
+Resets the grid for using with a new database table, but using the same columns definition.
+This can be useful when re-querying the database and want to see the changes.
+
+\wxheading{Parameters}
+
+\docparam{tab}{ Database table you want to assign to the grid. }
+\docparam{count}{ Number of rows you want to show or wxUSE\_QUERY for using a query. }
+\docparam{takeOwnership}{ If false, user must take care of deleting tab after deleting
+the wxDbGridTableBase. If true, deletion is made by destructor class. }
+
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