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wxWidgets/demos/dbbrowse/help.std/getcol.htm
George Tasker b5ffecfc98 First version of the DbBrowser demo program 
git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5715 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
2000-01-28 15:25:32 +00:00

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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML//EN">
<HTML><HEAD><TITLE>DBBrowser Help : Remstar ODBC Classes</TITLE></HEAD>
<BODY BGCOLOR=#C6DFC6><CENTER><IMG SRC="../help.png/logo.png"></CENTER><BR><CENTER><B>DBBrowser<BR>Mark Johnson, Berlin Germany<BR>mj10777@gmx.net</B><HR></CENTER>
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<TH><B><H3><IMG SRC="../help.png/remstar.png"><BR>Remstar ODBC Classes :<BR>The new wxDB::GetColumns() Function<BR>Description</H3><BR>(English)</B></FONT></TH>
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<B>Stand: 2000-01-23.01-mj10777</B><HR>
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<TR><TH bgcolor=#CCFFFF><B>There are 2 new wxDB Functions : </B></TH></TR>
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<A NAME="GETCOLUMNS">
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<TR><TH bgcolor=#FFFFAA><B><A HREF="#GETCOLUMNS">wxColInf *wxDB::GetColumns(char *tableName, int *numCols, const char *userID)</A></B></FONT></TH></TR>
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<TR><TH bgcolor=#FFFFE0><B>This Function stores all (<I><FONT color=#FF0000>int numCols</FONT>) information from the Table (<I><FONT color=#FF0000>char *tableName</FONT></I>).<BR>It returns the result in a <A HREF="#WXCOLINF">wxColInf</A> Stucture (Class)</B></FONT></TH></TR>
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<A NAME="GETKEYFIELDS"><P>
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<TR><TH bgcolor=#FFFFAA><B><A HREF="#GETKEYFIELDS">int wxDB::GetKeyFields(char *tableName, wxColInf* colInf,int noCols)</A></B></FONT></TH></TR>
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<TR><TH bgcolor=#FFFFE0><B>Tries to find out if any (<I><FONT color=#FF0000>int noCols</FONT></I>) of the columns (<I><FONT color=#FF0000>wxColInf* colInf</FONT></I>)<BR> in the Table (<I><FONT color=#FF0000>char *tableName</FONT></I>) are <IMG SRC="../help.png/key.png">&nbsp;Primary or <IMG SRC="../help.png/keyf.png">&nbsp;Foreign Keys.<HR>This Function is only called from GetColumns().</B></FONT></TH></TR>
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<TR><TH bgcolor=#CCFFFF><B>There are 4 new wxDB Classes (Structures) : </B></TH></TR>
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<A NAME="WXDBINF"><P>
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<TR><TH bgcolor=#FFFFAA><B><A HREF="#WXDBINF">wxDbInf</A></B></FONT></TH></TR>
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<B>This Class stores all ODBC-Information for a Database :<HR>
Catalog Entry (<I><FONT color=#FF0000>char catalog[128+1]</I></FONT>),<BR>
Schema (<I><FONT color=#FF0000>char schema[128+1]</I></FONT>)<BR>
the number of Tables found(<I><FONT color=#FF0000>int numTables</I></FONT>)<BR>
and a Pointer (<I><A HREF="#WXTABLEINF">wxTableInf*</A><FONT color=#FF0000> pTableInf</FONT></I>) Structure is stored.
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<A NAME="WXTABLEINF"><P>
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<TR><TH bgcolor=#FFFFAA><B><A HREF="#WXTABLEINF">wxTableInf</A></B></FONT></TH></TR>
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<B>This Class stores all ODBC-Information about a Table :<HR>
Table-Name (<I><FONT color=#FF0000>char tableName[DB_MAX_TABLE_NAME_LEN+1]</I></FONT>),<BR>
Table-Type (<I><FONT color=#FF0000>char tableType[254+1]</I></FONT>) - "TABLE", "SYSTEM TABLE" etc. ,<BR>
Table-Remarks (<I><FONT color=#FF0000>char tableRemarks[254+1]</I></FONT>),<BR>
the number of Columns found(<I><FONT color=#FF0000>int numCols</I></FONT>)<BR>
and a Pointer (<I><A HREF="#WXCOLINF">wxColInf*</A><FONT color=#FF0000> pColInf</FONT></I>) Structure is stored.
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<A NAME="WXCOLINF"><P>
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<TR><TH bgcolor=#FFFFAA><B><A HREF="#WXCOLINF">wxColInf</A></B></FONT></TH></TR>
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<B>This Class stores all ODBC-Information about a Column :<HR>
Catalog Entry (<I><FONT color=#FF0000>char catalog[128+1]</I></FONT>),<BR>
Schema (<I><FONT color=#FF0000>char schema[128+1]</I></FONT>)<BR>
Table-Name (<I><FONT color=#FF0000>char tableName[DB_MAX_TABLE_NAME_LEN+1]</I></FONT>),<BR>
Column-Name (<I><FONT color=#FF0000>char colName[DB_MAX_COLUMN_NAME_LEN+1]</I></FONT>),<BR>
Datatype (from SQL) (<I><FONT color=#FF0000>SWORD sqlDataType</I></FONT>),<BR>
Data-Name(from SQL) (<I><FONT color=#FF0000>char typeName[128+1]</I></FONT>),<BR>
Column size(from SQL) (<I><FONT color=#FF0000>SWORD columnSize</I></FONT>),<BR>
Buffer length(from SQL) (<I><FONT color=#FF0000>SWORD bufferLength</I></FONT>),<BR>
Decimal digits(from SQL) (<I><FONT color=#FF0000>short decimalDigits</I></FONT>),<BR>
numPrecRadix (from SQL) (<I><FONT color=#FF0000>short numPrecRadix</I></FONT>),<BR>
Nullable (from SQL) (<I><FONT color=#FF0000>short nullable</I></FONT>),<BR>
Remarks (<I><FONT color=#FF0000>char remarks[254+1]</I></FONT>),<BR>
Datatype (from wxDB) (<I><FONT color=#FF0000>int dbDataType</I></FONT>),<BR>
Primary-Key (<I><FONT color=#FF0000>int PkCol</I></FONT>) 0=No; 1= First Key, 2 = Second Key etc.,<BR>
Tables that use this Key as a Foreign Key(<I><FONT color=#FF0000>char PkTableName[DB_MAX_TABLE_NAME_LEN+1]</I></FONT>),<BR>
Foreign-Key (<I><FONT color=#FF0000>int FkCol</I></FONT>) 0=No; 1= First Key, 2 = Second Key etc.,<BR>
Table-Name where this Foreign-Key is Primary Key(<I><FONT color=#FF0000>char FkTableName[DB_MAX_TABLE_NAME_LEN+1]</I></FONT>),<BR>
and a Pointer (<I><A HREF="#WXCOLFOR">wxColFor*</A><FONT color=#FF0000> pColFor</FONT></I>) Structure is stored.
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<A NAME="WXCOLFOR"><P>
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<TR><TH bgcolor=#FFFFAA><B><A HREF="#WXCOLFOR">wxColFor</A></B></FONT></TH></TR>
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<B>This Class stores how this Column should be formated in a String : <HR>
Output String (<I><FONT color=#FF0000>wxString s_Field</I></FONT>),<BR>
Formatted Objects (TIMESTAMP needs 7) (<I><FONT color=#FF0000>wxString s_Format[7]</I></FONT>),<BR>
Formatted Objects (<I><FONT color=#FF0000>wxString s_Menge[7]</I></FONT>),<BR>
Formatted Objects (TT MM YYYY HH MM SS m) (<I><FONT color=#FF0000>int i_Menge[7]</I></FONT>),<BR>
National (0=timestamp,1=EU,2=UK,3=International,4=US)<I><FONT color=#FF0000>int i_Nation</I></FONT>),<BR>
Datatype (from wxDB) (<I><FONT color=#FF0000>int I_dbDataType</I></FONT>),<BR>
Datatype (from SQL) (<I><FONT color=#FF0000>SWORD i_sqlDataType</I></FONT>),<HR>
int Format(int Nation, int dbDataType,SWORD sqlDataType,short columnSize,short decimalDigits);<BR>
The Formatted Objects receive Standard Values and Format() is called.<BR>
The Programmers can, if they want something special , change these Values and call Format() again
</B></FONT></TH></TR>
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<TR><TH bgcolor=#FFBBBB><B>This class is most definitely very much underdeveloped !<BR>It was made so that the DBGrid could be realised.<BR>Changes here are probable. (Suggestions welcomed)</A></B></TH></TR>
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<TR><TH bgcolor=#FFF777><B>Well now, <A HREF="getcolsh.htm">that makes everything clear</A> does't it?</B></FONT></TH></TR>
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