/**
* This constructor is used while generating QueryInfo object for the table
*
* @param cd ColumnDescriptor Object
* @param tableName String
* @param tableNum int
* @throws StandardException
* @see TableQueryInfo#TableQueryInfo(FromBaseTable)
*/
ColumnQueryInfo(ColumnDescriptor cd, TableQueryInfo tqi, int tableNum) throws StandardException {
this.actualColumnName = cd.getColumnName();
this.actualColumnNumber = cd.getPosition();
this.columnDescriptor = cd;
this.td = cd.getTableDescriptor();
this.columnType = cd.getType();
this.tqi = tqi;
this.exposedColumnName = this.actualColumnName;
this.virtualColumnNumber = this.actualColumnNumber;
assert this.columnDescriptor != null;
}
/**
* This constructor is invoked while analyzing the projection attributes
*
* @param rc ResultColumn
* @throws StandardException
* @see SelectQueryInfo#visit(com.pivotal.gemfirexd.internal.iapi.sql.compile.Visitable)
*/
ColumnQueryInfo(final ResultColumn rc, QueryInfoContext qic) throws StandardException {
final ColumnDescriptor cd = searchColumnDescriptor(rc);
if (cd != null) {
this.actualColumnName = cd.getColumnName();
this.actualColumnNumber = cd.getPosition();
this.columnDescriptor = cd;
this.columnType = cd.getType();
this.td = cd.getTableDescriptor();
} else {
String columnName = rc.getSourceColumnName();
if (columnName == null) {
columnName = rc.getActualName();
}
this.actualColumnName = columnName;
this.actualColumnNumber = rc.getColumnPosition();
this.columnType = rc.getType();
this.td = null;
this.columnDescriptor =
new ColumnDescriptor(
this.actualColumnName,
this.actualColumnNumber,
this.columnType,
null, // default
null, // defaultInfo
(UUID) null, // table uuid
(UUID) null, // default uuid
0L, // autoincStart
0L, // autoincInc
0L,
false); // autoincValue
}
if (tableNum > -1) {
DMLQueryInfo currentTop = qic.getCurrentScopeQueryInfo();
this.tqi = currentTop.getTableQueryInfo(tableNum);
// TODO:Asif Should we do correlation check here?
}
this.exposedColumnName = rc.getName();
this.virtualColumnNumber = rc.getVirtualColumnId();
assert this.columnDescriptor != null;
}