/*
* Given a column name, and a Hashtable containing tables, determine
* which table "owns" a given column.
*/
private TinySQLTable getTableForColumn(java.util.Hashtable <Object, Object> tables, String inputColumn)
{
TinySQLTable tbl;
java.util.Vector <Object> tableNames;
java.util.Hashtable <Object, Object> columnInfo;
String findColumn, tableAndAlias = (String)null, tableAlias;
int i, dotAt;
findColumn = inputColumn.toUpperCase();
dotAt = findColumn.indexOf(".");
tableNames = (java.util.Vector <Object>)tables.get("TABLE_SELECT_ORDER");
if (dotAt > -1)
{
tableAlias = findColumn.substring(0, dotAt);
try
{
tableAndAlias = UtilString.findTableAlias(tableAlias, tableNames);
}
catch (Exception)
{
}
if (tableAndAlias != (String)null)
{
tbl = (TinySQLTable)tables.get(tableAndAlias);
if (tbl != (TinySQLTable)null)
{
return(tbl);
}
}
}
else
{
for (i = 0; i < tableNames.size(); i++)
{
tbl = (TinySQLTable)tables.get((String)tableNames.elementAt(i));
/*
* Get the Hashtable containing column information, and see if it
* contains the column we're looking for.
*/
columnInfo = tbl.column_info;
if (columnInfo != (java.util.Hashtable <Object, Object>)null)
{
if (columnInfo.containsKey(findColumn))
{
return(tbl);
}
}
}
}
return((TinySQLTable)null);
}
internal TsColumn(String s, java.util.Hashtable <Object, Object> tableDefs, String inputContext)
//throws tinySQLException
{
FieldTokenizer ft, ftArgs;
int j, numericType, nameLength, dotAt, argIndex;
String upperName, checkName, nextArg;
TinySQLTable jtbl;
TsColumn tcol;
java.util.Vector <Object> t;
java.util.Enumeration <Object> col_keys;
name = s;
longName = name;
nameLength = name.length();
contextList = new java.util.Vector <Object>();
contextList.addElement(inputContext);
ft = new FieldTokenizer(name, '(', false);
if (ft.countFields() == 2)
{
/*
* This is a function rather than a simple column or constant
*/
functionName = ft.getField(0).toUpperCase();
if (functionName.equals("COUNT"))
{
type = java.sql.Types.INTEGER;
size = 10;
intValue = java.lang.Integer.MIN_VALUE;
groupedColumn = true;
}
else if (functionName.equals("SUM"))
{
type = java.sql.Types.FLOAT;
size = 10;
groupedColumn = true;
}
else if (functionName.equals("TO_DATE"))
{
type = java.sql.Types.DATE;
size = 10;
}
else if (functionName.equals("CONCAT") |
functionName.equals("UPPER") |
functionName.equals("SUBSTR") |
functionName.equals("TRIM"))
{
type = java.sql.Types.CHAR;
}
functionArgString = ft.getField(1);
ftArgs = new FieldTokenizer(functionArgString, ',', false);
functionArgs = new java.util.Vector <Object>();
argIndex = 0;
while (ftArgs.hasMoreFields())
{
nextArg = ftArgs.nextField();
tcol = new TsColumn(nextArg, tableDefs, inputContext);
if (tcol.isGroupedColumn())
{
groupedColumn = true;
}
/*
* MAX and MIN functions can be either FLOAT or CHAR types
* depending upon the type of the argument.
*/
if (functionName.equals("MAX") | functionName.equals("MIN"))
{
if (argIndex > 0)
{
throw new TinySQLException("Function can only have 1 argument");
}
groupedColumn = true;
type = tcol.type;
size = tcol.size;
}
else if (functionName.equals("CONCAT"))
{
type = java.sql.Types.CHAR;
size += tcol.size;
}
else if (functionName.equals("UPPER"))
{
type = java.sql.Types.CHAR;
size = tcol.size;
}
else if (functionName.equals("TO_DATE"))
{
type = java.sql.Types.DATE;
size = 10;
}
else if (functionName.equals("TRIM"))
{
type = java.sql.Types.CHAR;
size = tcol.size;
}
else if (functionName.equals("SUBSTR"))
{
type = java.sql.Types.CHAR;
if (argIndex == 0 & tcol.type != java.sql.Types.CHAR)
{
throw new TinySQLException("SUBSTR first argument must be character");
}
else if (argIndex == 1)
{
if (tcol.type != java.sql.Types.INTEGER | tcol.intValue < 1)
{
throw new TinySQLException("SUBSTR second argument "
+ tcol.getString() + " must be integer > 0");
}
}
else if (argIndex == 2)
{
if (tcol.type != java.sql.Types.INTEGER | tcol.intValue < 1)
{
throw new TinySQLException("SUBSTR third argument "
+ tcol.getString() + " must be integer > 0");
}
size = tcol.intValue;
}
}
argIndex++;
functionArgs.addElement(tcol);
}
}
else
{
/*
* Check for SYSDATE
*/
if (name.toUpperCase().equals("SYSDATE"))
{
isConstant = true;
type = java.sql.Types.DATE;
size = 10;
notNull = true;
valueSet = true;
//Basties mote: not really SimpleDateFormat needed... - need yyyy-MM-dd
// stringValue = fmtyyyyMMdd.format(today.getTime());
stringValue = System.DateTime.Today.ToString("yyyy-MM-dd");
/*
* Check for a quoted string
*/
}
else if (UtilString.isQuotedString(name))
{
isConstant = true;
type = java.sql.Types.CHAR;
stringValue = UtilString.removeQuotes(name);
if (stringValue != (String)null)
{
size = stringValue.length();
notNull = true;
valueSet = true;
}
}
else
{
/*
* Check for a numeric constant
*/
numericType = UtilString.getValueType(name);
if (numericType == java.sql.Types.INTEGER)
{
intValue = java.lang.Integer.valueOf(name).intValue();
size = 10;
type = numericType;
isConstant = true;
notNull = true;
valueSet = true;
}
else if (numericType == java.sql.Types.FLOAT)
{
floatValue = java.lang.Float.valueOf(name).floatValue();
size = 10;
type = numericType;
isConstant = true;
notNull = true;
valueSet = true;
}
else
{
/*
* This should be a column name.
*/
columnTable = (TinySQLTable)null;
upperName = name.toUpperCase();
if (TinySQLGlobals.DEBUG)
{
java.lang.SystemJ.outJ.println("Trying to find table for " + upperName);
}
dotAt = upperName.indexOf(".");
if (dotAt > -1)
{
tableName = upperName.substring(0, dotAt);
if (tableDefs != (java.util.Hashtable <Object, Object>)null &
tableName.indexOf("->") < 0)
{
t = (java.util.Vector <Object>)tableDefs.get("TABLE_SELECT_ORDER");
tableName = UtilString.findTableAlias(tableName, t);
}
upperName = upperName.substring(dotAt + 1);
/*
* Check to see if this column name has a short equivalent.
*/
if (upperName.length() > 11)
{
longName = name;
upperName = TinySQLGlobals.getShortName(upperName);
}
columnTable = (TinySQLTable)tableDefs.get(tableName);
}
else if (tableDefs != (java.util.Hashtable <Object, Object>)null)
{
/*
* Check to see if this column name has a short equivalent.
*/
if (upperName.length() > 11)
{
longName = name;
upperName = TinySQLGlobals.getShortName(upperName);
}
/*
* Use an enumeration to go through all of the tables to find
* this column.
*/
t = (java.util.Vector <Object>)tableDefs.get("TABLE_SELECT_ORDER");
for (j = 0; j < t.size(); j++)
{
tableName = (String)t.elementAt(j);
jtbl = (TinySQLTable)tableDefs.get(tableName);
col_keys = jtbl.column_info.keys();
/*
* Check all columns.
*/
while (col_keys.hasMoreElements())
{
checkName = (String)col_keys.nextElement();
if (checkName.equals(upperName))
{
upperName = checkName;
columnTable = jtbl;
break;
}
}
if (columnTable != (TinySQLTable)null)
{
break;
}
}
}
else
{
if (TinySQLGlobals.DEBUG)
{
java.lang.SystemJ.outJ.println("No table definitions.");
}
}
if (columnTable != (TinySQLTable)null)
{
name = columnTable.table + "->" + columnTable.tableAlias
+ "." + upperName;
type = columnTable.ColType(upperName);
size = columnTable.ColSize(upperName);
decimalPlaces = columnTable.ColDec(upperName);
tableName = columnTable.table + "->" + columnTable.tableAlias;
}
}
}
}
}