/**
* Retruns index for column
*
* @param columnName name of column
* @return int index or -1 if not found
*/
public int findColumn(String columnName) {
if (namedJoinColumnExpressions != null && namedJoinColumnExpressions.containsKey(columnName)) {
return -1;
}
if (variables != null) {
return variables.getIndex(columnName);
} else if (columnAliases != null) {
return columnAliases.getIndex(columnName);
} else {
return rangeTable.findColumn(columnName);
}
}
