Accessor function to assign the user ID for this class instance.
-\section{\class{wxDbIdxDef}}\label{wxdbidxdef}
+\section{\class{wxDbIndexDef}}\label{wxdbIndexdef}
Used in creation of non-primary indexes. Currently there are no member
functions for this class.
\begin{itemize}\itemsep=0pt
\item \helpref{wxDbColDef}{wxdbcoldef}
\item \helpref{wxDbColDataPtr}{wxdbcoldataptr}
-\item \helpref{wxDbIdxDef}{wxdbidxdef}
+\item \helpref{wxDbIndexDef}{wxdbIndexdef}
\end{itemize}
\wxheading{Constants}
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}
\membersection{wxDbTable::CreateIndex}\label{wxdbtablecreateindex}
-\func{bool}{CreateIndex}{\param{const wxString \&}{idxName}, \param{bool }{unique},
-\param{UWORD }{noIdxCols}, \param{wxDbIdxDef *}{pIdxDefs},
+\func{bool}{CreateIndex}{\param{const wxString \&}{IndexName}, \param{bool }{unique},
+\param{UWORD }{numIndexColumns}, \param{wxDbIndexDef *}{pIndexDefs},
\param{bool }{attemptDrop=true}}
This member function allows you to create secondary (non primary) indexes on
\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 wxDbIndexDef 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.}
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
+wxDbIndexDef 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 wxDbIndexDef 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
+ wxDbIndexDef 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}
\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
+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}
\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}}
\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?
+\docparam{updateable}{{\it OPTIONAL}. Are updates allowed on this column?
Default is true.}
-\docparam{insAllow}{{\it OPTIONAL}. Inserts allowed on this column?
+\docparam{insertAllowed}{{\it OPTIONAL}. Inserts allowed on this column?
Default is true.}
-\docparam{derivedCol}{{\it OPTIONAL}. Is this a derived column (non-base
+\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
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.
projects / wxWidgets.git / blobdiff