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/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
---------------------------------------------------------------------
-- Top N Queries with Macro
---------------------------------------------------------------------
DEFINE my_macro_1 (QUERY, A) RETURNS C {
$C = FOREACH $QUERY GENERATE group AS query, SUM(data.$A) AS count;
} ;
data =
LOAD '$input'
AS (query:CHARARRAY, count:INT);
queries_group =
GROUP data
BY query
PARALLEL $reducers;
queries_sum = my_macro_1(queries_group, count);
queries_ordered =
ORDER queries_sum
BY count DESC
PARALLEL $reducers;
queries_limit = LIMIT queries_ordered $n;
STORE queries_limit INTO '$output';