@Override
protected void doEvaluate(
TExecutionContext context, LazyList<? extends ValueSource> inputs, ValueTarget output) {
String[] parts = {"", "", ""};
if (covering.length == 1) {
ColumnName columnName = ColumnName.parse("", inputs.get(0).getString());
parts[0] = columnName.getTableName().getSchemaName();
parts[1] = columnName.getTableName().getTableName();
parts[2] = columnName.getName();
} else {
for (int i = covering.length - 1, j = 2; i >= 0; --i, --j) {
parts[j] = inputs.get(i).getString();
}
}
if (parts[0].isEmpty()) {
parts[0] = context.getCurrentSchema();
}
AkibanInformationSchema ais = context.getQueryContext().getStore().schema().ais();
Columnar columnar = ais.getTable(parts[0], parts[1]);
if (columnar == null) {
columnar = ais.getView(parts[0], parts[1]);
if (columnar == null) {
throw new NoSuchTableException(parts[0], parts[1]);
}
}
Column column = columnar.getColumn(parts[2]);
if (column == null) {
throw new NoSuchColumnException(String.format("%s.%s.%s", parts[0], parts[1], parts[2]));
}
output.putString(column.getType().toStringConcise(false), null);
}
@Override
public boolean isSelected(Columnar columnar) {
return columnar.isTable()
&& ((((Table) columnar).getGroup() == table.getGroup()) || fkTables.contains(columnar));
}