Examples with WithOptionsTableMacro org.apache.drill.exec.store.table.function.WithOptionsTableMacro used on opensource projects

Example 1 with WithOptionsTableMacro

use of org.apache.drill.exec.store.table.function.WithOptionsTableMacro in project drill by apache.

the class AbstractSchema method getFunctions.

/**
 * For the given table names returns list of acceptable table functions
 * which are common for all Drill schemas. When overriding this method,
 * parent functions must be included first to be evaluated first.
 * If not included, parent functions won't be taken into account when creating table instance.
 *
 * @param name table name
 * @return list of table functions
 */
@Override
public Collection<Function> getFunctions(String name) {
    List<TableParamDef> parameters = getFunctionParameters();
    TableSignature signature = TableSignature.of(name, parameters);
    WithOptionsTableMacro function = new WithOptionsTableMacro(signature, arguments -> {
        Table table = getTable(name);
        if (table instanceof DrillTable) {
            return applyFunctionParameters((DrillTable) table, parameters, arguments);
        } else if (table == null) {
            return null;
        }
        throw new DrillRuntimeException(String.format("Table [%s] is not of Drill table instance. " + "Given instance is of [%s].", name, table.getClass().getName()));
    });
    return Collections.singletonList(function);
}