@Override
public void visit(Column column) {
Table affectedTable = column.getTable();
if (_sideTable == null) {
_sideTable = affectedTable;
} else {
if (!ParserUtil.equals(_sideTable, affectedTable)) {
throw new RuntimeException(
"Multiple tables on one side of a join condition is not supported yet!");
}
}
}
@Override
public void visit(Column column) {
// extract type for the column
String tableSchemaName = _tan.getSchemaName(ParserUtil.getComponentName(column.getTable()));
String columnName = column.getColumnName();
TypeConversion tc = _schema.getType(tableSchemaName, columnName);
// extract the position (index) of the required column
int position =
HierarchyExtractor.extractComponentIndex(
column, _affectedComponent, _queryPlan, _schema, _tan);
ValueExpression ve = new ColumnReference(tc, position);
_exprStack.push(ve);
}
public void visit(Column tableColumn) throws Exception {
if (tableColumn.getTable() != null) {
tableColumn.getTable().accept(this);
}
}