#!/usr/bin/env perl

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# SUB: Multiquery
# Please include a brief description here.
# - _TEST_ The first example; one that is defined in the bug with one split
# -        in the map phase
# - _TEST_ Multiple side files, all in map phase.
# - _TEST_ Two loads and two stores in map phase.
# - _TEST_ One split added in reduce phase and map-only splitee.
# - _TEST_ One split added in reduce phase and one map-reduce splitee
# - _TEST_ One split in reduce phase and two Map-Reduce splitees.
# - _TEST_ Two loads and two stores in reduce phase 
# - _TEST_ Explicit split with two side files.
# - _TEST_ Explicit split with order by and two side files.
# - _TEST_ Implicit split with multiple side files.
# - _TEST_ Streaming with multiple stores.
# - _TEST_ Script with intermediate stores.
# - _TEST_ Implicit split with order by and multiple side files.
# - _TEST_ Self join using fragment replicate join with multiple side files.
# - _TEST_ PigMix Test Case L12.
# - _TEST_ One split in map phase and two Map-Reduce splitees with mixed combiners.
# - _TEST_ One split in map phase and two Map-Reduce splitees without combiners.
# - _TEST_ Splittees with different map key types and nested splits.
# - _TEST_ Splittees with different map key type.
# - _TEST_ Streaming in demux.
# - _TEST_ Streaming in nested demux.
# - _TEST_ PigMix Test Case L12 version 2

$cfg = {
    'driver' => 'Pig',
    'nummachines' => 5,

    'groups' => [
        {
        'name' => 'MultiQuery',
        'floatpostprocess' => 1,
        'delimiter' => '	',
        'tests' => [
            {
            # The first exmaple; one that is defined in the bug with one split
            # in the map phase
            'num' => 1,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name: chararray, age: int, gpa: float); 
                        b = filter a by age < 22; store b into ':OUTPATH:.1'; 
                        c = group b by age; 
                        d = foreach c generate group, SUM(b.gpa);
                        store d into ':OUTPATH:.2'; #,
            'sql' => "select name, age, gpa from studenttab10k where age < 22;
                      select age, sum(gpa) from studenttab10k where age < 22 group by age;",
            },
            {
            # Multiple side files, all in map phase.
            'num' => 2,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name: chararray, age: int, gpa: float); 
                        b = filter a by age < 22; 
                        store b into ':OUTPATH:.1'; 
                        c = filter b by gpa > 3.0; 
                        store c into ':OUTPATH:.2'; 
                        d = filter c by name < 'm'; 
                        store d into ':OUTPATH:.3'; #,
            'sql' => "select name, age, gpa from studenttab10k where age < 22;
                      select name, age, gpa from studenttab10k where age < 22 and gpa > 3.0;
                      select name, age, gpa from studenttab10k where age < 22 and gpa > 3.0 and name < 'm';",                        
            },
            {
            # Two loads and two stores in map phase.
            'num' => 3,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name, age, gpa); 
                        b = load ':INPATH:/singlefile/votertab10k' as (name, age, registration, contributions); 
                        c = filter a by age < 20; 
                        d = filter b by age < 20; 
                        store c into ':OUTPATH:.1'; 
                        store d into ':OUTPATH:.2'; 
                        e = cogroup c by name, d by name; 
                        f = foreach e generate flatten(c), flatten(d); 
                        store f into ':OUTPATH:.3'; #,
            'sql' => "select name, age, gpa from studenttab10k where age < 20;
                      select name, age, registration, contributions from votertab10k where age < 20;
                      select a.name, a.age, a.gpa, b.name, b.age, b.registration, b.contributions 
                      from studenttab10k as a full outer join votertab10k as b using(name) 
                      where a.age < 20 and b.age < 20;",
            },
            {
            # One split added in reduce phase and map-only splitee.
            'num' => 4,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name: chararray, age: int, gpa: float); 
                        b = filter a by gpa < 3.0; 
                        c = group b by age; 
                        d = foreach c generate group, AVG(b.gpa); 
                        store d into ':OUTPATH:.1'; 
                        e = filter d by $1 > 1.5; 
                        store e into ':OUTPATH:.2'; #,
            'sql' => "select age, avg(gpa) from studenttab10k where gpa < 3.0 group by age;
                      select age, avg(gpa) from studenttab10k where gpa < 3.0 group by age having avg(gpa) > 1.5;",
            },
            {
            # One split added in reduce phase and one map-reduce splitee
            'num' => 5,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name: chararray, age: int, gpa: float); 
                        b = filter a by gpa < 3.0; 
                        c = group b by age; 
                        d = foreach c generate group, AVG(b.gpa); 
                        store d into ':OUTPATH:.1'; 
                        e = filter d by $1 > 1.5; 
                        f = group e by $1; 
                        g = foreach f generate group, SUM(e.$0); 
                        store g into ':OUTPATH:.2'; #,
            'sql' => "select age, avg(gpa) from studenttab10k where gpa < 3.0 group by age;
                      select t.b, sum(t.a) from (select age as a, avg(gpa) as b from studenttab10k 
                      where gpa < 3.0 group by age having avg(gpa) > 1.5) as t group by t.b;",               
            },
            {
            # One split in reduce phase and two Map-Reduce splitees.
            'num' => 6,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name: chararray, age: int, gpa: float); 
                        b = filter a by gpa < 3.0; 
                        c = group b by age; 
                        d = foreach c generate group, AVG(b.gpa); 
                        e = filter d by $1 > 1.5; 
                        e1= group e by $1; 
                        e2 = foreach e1 generate group, SUM(e.$0); 
                        store e2 into ':OUTPATH:.1'; 
                        f = filter d by $1 <= 1.5; 
                        f1 = group f by $1; 
                        f2 = foreach f1 generate group, COUNT(f.$0); 
                        store f2 into ':OUTPATH:.2'; #,
            'sql' => "select t.c1, sum(t.c0) from (select age as c0, avg(gpa) as c1 from studenttab10k 
                      where gpa < 3.0 group by age having avg(gpa) > 1.5) as t group by t.c1;
                      select t.c1, count(t.c0) from (select age as c0, avg(gpa) as c1 from studenttab10k 
                      where gpa < 3.0 group by age having avg(gpa) <= 1.5) as t group by t.c1;",
            },
            {
            # Two loads and two stores in reduce phase 
            'num' => 7,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name, age, gpa); 
                        b = load ':INPATH:/singlefile/votertab10k' as (name, age, registration, contributions); 
                        c = filter a by age < 20; 
                        d = filter b by age < 20; 
                        e = cogroup c by name, d by name; 
                        f = foreach e generate flatten(c), flatten(d); 
                        g = group f by d::age; 
                        h = foreach g generate group, SUM(f.gpa); 
                        store h into ':OUTPATH:.1'; 
                        e = filter f by c::gpa < 3.0; 
                        store e into ':OUTPATH:.2'; #,
            'sql' => "select c5, sum(c3)  from (select a.name as c1, a.age as c2, a.gpa as c3, b.name as c4, 
                      b.age as c5, b.registration as c6, b.contributions as c7 
                      from studenttab10k as a full outer join votertab10k as b using(name) 
                      where a.age < 20 and b.age < 20) as t group by t.c5;
                      select a.name, a.age, a.gpa, b.name, b.age, b.registration, b.contributions 
                      from studenttab10k as a full outer join votertab10k as b using(name) 
                      where a.age < 20 and b.age < 20 and a.gpa < 3.0;",
            },
            {
            # Explicit split with two side files.
            'num'=> 8,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name, age, gpa); 
                        split a into a1 if name > 'm', a2 if name <= 'm'; 
                        store a1 into ':OUTPATH:.1'; 
                        store a2 into ':OUTPATH:.2'; 
                        b = cogroup a1 by age, a2 by age; 
                        c = foreach b generate flatten(a1), flatten(a2); 
                        store c into ':OUTPATH:.3'; #,
            'sql' => "select name, age, gpa from studenttab10k where name > 'm';
                      select name, age, gpa from studenttab10k where name <= 'm';
                      select A.name, A.age, A.gpa, B.name, B.age, B.gpa 
                      from (select * from studenttab10k where name > 'm') as A 
                      join (select * from studenttab10k where name <= 'm') as B using (age);",
            },
            {
            # Explicit split with order by and two side files.
            'num'=> 9,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:float); 
                        split a into a1 if age > 50, a2 if name < 'm';  
                        b2 = distinct a2;
                        b1 = order a1 by name;
                        store b2 into ':OUTPATH:.2';
                        store b1 into ':OUTPATH:.1';
                        c = cogroup b2 by name, b1 by name; 
                        d = foreach c generate flatten(group), COUNT($1), COUNT($2); 
                        store d into ':OUTPATH:.3'; #,
            'sql' => "select name, age, gpa from studenttab10k where age > 50 order by name;
                      select distinct name, age, gpa from studenttab10k where name < 'm';
                      select name, count(A.name), count(B.name) 
                      from (select distinct name from studenttab10k where name < 'm') as A 
                      join (select name from studenttab10k where age > 50) as B using (name) group by name;",
			'verify_with_pig' => 1,
			'verify_pig_version' => 'old',
            },
            {
            # Implicit split with multiple side files.
            'num'=> 10,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:float); 
                        b = filter a by age > 50; 
                        c = filter a by gpa > 3.0; 
                        store c into ':OUTPATH:.1'; 
                        d = cogroup b by name, c by name; 
                        e = foreach d generate flatten(b), flatten(c); 
                        store e into ':OUTPATH:.2';
                        f = filter e by b::age < 75;
                        store f into ':OUTPATH:.3'; #,
            'sql' => "select name, age, gpa from studenttab10k where gpa > 3.0;
                      select A.name, A.age, A.gpa, B.name, B.age, B.gpa 
                      from (select * from studenttab10k where age > 50) as A 
                      join (select * from studenttab10k where gpa > 3.0) as B using (name);
                      select A.name, A.age, A.gpa, B.name, B.age, B.gpa 
                      from (select * from studenttab10k where age > 50) as A 
                      join (select * from studenttab10k where gpa > 3.0) as B using (name) where A.age < 75;",        
            },
            {
            # Streaming with multiple stores
            'num' => 11,
            'pig' => q# define CMD1 `perl -ne 'print $_;'`;
                        define CMD2 `perl -ne 'print $_;'`;
                        A = load ':INPATH:/singlefile/studenttab10k' as (name, age, gpa);
                        B = stream A through CMD1 as (name, age, gpa);
                        store B into ':OUTPATH:.1';
                        C = stream B through CMD2 as (name, age, gpa);
                        D = JOIN B by name, C by name;
                        store D into ':OUTPATH:.2'; #,
            'sql' => "select name, age, gpa from studenttab10k;
                      select A.name, A.age, A.gpa, B.name, B.age, B.gpa 
                      from studenttab10k as A join studenttab10k as B using(name);",
            },
            {
            # With intermediate store
            'num' => 12,
            'pig' => q# A = load ':INPATH:/singlefile/studenttab10k' as (name, age, gpa);
                        store A into ':OUTPATH:.1';
                        B = load ':OUTPATH:.1';
                        store B into ':OUTPATH:.2'; #,
            'sql' => "select name, age, gpa from studenttab10k;
                      select name, age, gpa from studenttab10k;",
            },
            {
            # Implicit split with order by and multiple side files.
            'num'=>13,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:float); 
                        b = filter a by age > 50; 
                        c = filter a by gpa > 3.0; 
                        store c into ':OUTPATH:.1'; 
                        d = cogroup b by name, c by name; 
                        e = foreach d generate flatten(b), flatten(c);
                        f = order e by b::name;
                        store e into ':OUTPATH:.2';
                        f = filter e by b::age < 75;
                        store f into ':OUTPATH:.3'; #,
            'sql' => "select name, age, gpa from studenttab10k where gpa > 3.0;
                      select A.name, A.age, A.gpa, B.name, B.age, B.gpa 
                      from (select * from studenttab10k where age > 50) as A 
                      join (select * from studenttab10k where gpa > 3.0) as B using (name)
                      order by A.name;
                      select A.name, A.age, A.gpa, B.name, B.age, B.gpa 
                      from (select * from studenttab10k where age > 50) as A 
                      join (select * from studenttab10k where gpa > 3.0) as B using (name) 
                      where A.age < 75 order by A.name;",        
            },
            # Self join using fragment replicate join with multiple side files
            {
            'num' => 14,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:double);
                        b = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:double);
                        c = filter a by age > 50; 
                        store c into ':OUTPATH:.1';
                        d = filter b by gpa > 3.0; 
                        store d into ':OUTPATH:.2';
                        e = join c by gpa, d by gpa using 'repl';
                        store e into ':OUTPATH:.3'; #,
            'sql' => "select name, age, gpa from studenttab10k where age > 50;
                      select name, age, gpa from studenttab10k where gpa > 3.0;
                      select a.name, a.age, a.gpa, b.name, b.age, b.gpa
                      from studenttab10k as a join studenttab10k as b using(gpa) 
                      where a.age > 50 and b.gpa > 3.0;",
            },
            # PigMix Test Case L12
            {
            'num' => 15,
            'pig' => q# a = load ':INPATH:/singlefile/votertab10k' as (name, age, registration, contributions);
                        b = foreach a generate name, age, contributions;
                        split b into c1 if age > 50, c2 if age <= 50; 
                        split c1 into d1 if name < 'm', d2 if name >= 'm';
                        e = group c2 by name;
                        e1 = foreach e generate group, SUM(c2.contributions);
                        store e1 into ':OUTPATH:.1';
                        f = group d1 by name;
                        f1 = foreach f generate group, MAX(d1.contributions);
                        store f1 into ':OUTPATH:.2';
                        g = group d2 by name;
                        g1 = foreach g generate group, COUNT(d2);
                        store g1 into ':OUTPATH:.3'; #,
            'sql' => "select name, sum(contributions) from votertab10k where age <= 50 group by name;
                      select name, max(contributions) from votertab10k where (age > 50 and name < 'm') group by name;
                      select name, count(*) from votertab10k where (age > 50 and name >= 'm') group by name;",
            },
            # One split in map phase and two Map-Reduce splitees with mixed combiner.
            {
            'num' => 16,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name: chararray, age: int, gpa: float); 
                        b = filter a by gpa < 3.0; 
                        c = filter a by gpa >= 3.0;
                        d = group b by age; 
                        e = foreach d generate group, AVG(b.gpa);                                                  
                        store e into ':OUTPATH:.1'; 
                        f = group c by age; 
                        g = foreach f generate group, MAX(c.gpa) - MIN(c.gpa); 
                        store g into ':OUTPATH:.2'; #,
            'sql' => "select age, avg(gpa) from studenttab10k where gpa < 3.0 group by age;
                      select age, max(gpa) - min(gpa) from studenttab10k where gpa >= 3.0 group by age;",
            },
            # One split in map phase and two Map-Reduce splitees without combiner.
            {
            'num' => 17,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name: chararray, age: int, gpa: float); 
                        b = filter a by gpa < 3.0; 
                        c = filter a by gpa >= 3.0;
                        d = group b by age; 
                        e = foreach d generate group, MAX(b.gpa) + MIN(b.gpa);                                                  
                        store e into ':OUTPATH:.1'; 
                        f = group c by age; 
                        g = foreach f generate group, MAX(c.gpa) - MIN(c.gpa); 
                        store g into ':OUTPATH:.2'; #,
            'sql' => "select age, max(gpa) + min(gpa) from studenttab10k where gpa < 3.0 group by age;
                      select age, max(gpa) - min(gpa) from studenttab10k where gpa >= 3.0 group by age;",
            },
            # Splittees with different map key types and nested splits
            {
            'num' => 18,
            'pig' => q# a = load ':INPATH:/singlefile/votertab10k' as (name: chararray, age:int, registration, contributions:double);
                        b = foreach a generate name, age, contributions;
                        split b into c1 if age > 10, c2 if age <= 60; 
                        split c1 into d1 if name < 'y', d2 if name >= 'c';
                        e = group c2 by name parallel 2;
                        e1 = foreach e generate group, SUM(c2.contributions);
                        store e1 into ':OUTPATH:.1';
                        f = group d1 by name parallel 3;
                        f1 = foreach f generate group, MAX(d1.contributions);
                        store f1 into ':OUTPATH:.2';
                        g = group d2 by age parallel 4;
                        g1 = foreach g generate group, COUNT(d2);
                        store g1 into ':OUTPATH:.3'; #,
            'sql' => "select name, sum(contributions) from votertab10k where age <= 60 group by name;
                      select name, max(contributions) from votertab10k where (age > 10 and name < 'y') group by name;
                      select age, count(*) from votertab10k where (age > 10 and name >= 'c') group by age;",
            },
            # Splittees with different map key types
            {
            'num' => 19,
            'pig' => q# a = load ':INPATH:/singlefile/votertab10k' as (name: chararray, age:int, registration, contributions:double);
                        b = foreach a generate name, age, contributions;
                        split b into c1 if age > 50, c2 if age <= 50; 
                        e = group c2 by name;
                        e1 = foreach e generate group, SUM(c2.contributions);
                        store e1 into ':OUTPATH:.1';
                        f = group c1 by age;
                        f1 = foreach f generate group, MAX(c1.contributions);
                        store f1 into ':OUTPATH:.2'; #,
            'sql' => "select name, sum(contributions) from votertab10k where age <= 50 group by name;
                      select age, max(contributions) from votertab10k where age > 50 group by age;",
            },
            # Streaming in demux
            {
            'num' => 20,
            'execonly' => 'mapred',
            'pig' => q#
                        define CMD `perl GroupBy.pl '\t' 0` ship(':SCRIPTHOMEPATH:/GroupBy.pl');
                        A = load ':INPATH:/singlefile/studenttab10k';
                        split A into A1 if $0 < 'm', A2 if $0 >= 'm';
                        B = group A1 by $0;
                        C = foreach B generate flatten(A1);
                        D = stream C through CMD;
                        store D into ':OUTPATH:.1';
                        E = group A2 by $0;
                        F = foreach E generate group, COUNT(A2);
                        store F into ':OUTPATH:.2';#,
            'sql' => "select name, count(*) from studenttab10k where name < 'm' group by name;
                      select name, count(*) from studenttab10k where name >= 'm' group by name;",
            },
            # Streaming in nested demux
            {
            'num' => 21,
            'execonly' => 'mapred',
            'pig' => q#
                        define CMD `perl GroupBy.pl '\t' 0` ship(':SCRIPTHOMEPATH:/GroupBy.pl');
                        A = load ':INPATH:/singlefile/studenttab10k';
                        split A into A1 if $0 < 'm', A2 if $0 >= 'm';
                        split A1 into A3 if $1 < 30, A4 if $1 >= 30;
                        B = group A3 by $0;
                        C = foreach B generate flatten(A3);
                        D = stream C through CMD;
                        store D into ':OUTPATH:.1';
                        E = group A2 by $0;
                        F = foreach E generate group, COUNT(A2);
                        store F into ':OUTPATH:.2';                       
                        G = group A4 by $0;
                        H = foreach G generate group, COUNT(A4);
                        store H into ':OUTPATH:.3';#,
            'sql' => "select name, count(*) from studenttab10k where name < 'm' and age < 30 group by name;
                      select name, count(*) from studenttab10k where name >= 'm' group by name;
                      select name, count(*) from studenttab10k where name < 'm' and age >= 30 group by name;",
            },
            # PigMix Test Case L12 version 2
            {
            'num' => 22,
            'pig' => q# a = load ':INPATH:/singlefile/votertab10k' as (name, age, registration, contributions);
                        b = foreach a generate name, age, contributions;
                        split b into c1 if age > 50, c2 if age <= 50; 
                        split c1 into d1 if name < 'm', d2 if name >= 'm';
                        e = group c2 by (name, age);
                        e1 = foreach e generate flatten(group), SUM(c2.contributions);
                        store e1 into ':OUTPATH:.1';
                        f = group d1 by (name, age);
                        f1 = foreach f generate flatten(group), MAX(d1.contributions);
                        store f1 into ':OUTPATH:.2';
                        g = group d2 by (name, age);
                        g1 = foreach g generate flatten(group), COUNT(d2);
                        store g1 into ':OUTPATH:.3'; #,
            'sql' => "select name, age, sum(contributions) from votertab10k where age <= 50 group by name, age;
                      select name, age, max(contributions) from votertab10k where (age > 50 and name < 'm') group by name, age;
                      select name, age, count(*) from votertab10k where (age > 50 and name >= 'm') group by name, age;",
            },
            # PigMix Test Case L12 version 3 (modified to have different map key types in inner split)
            {
            'num' => 23,
            'pig' => q# a = load ':INPATH:/singlefile/votertab10k' as (name, age, registration, contributions);
                        b = foreach a generate name, age, contributions;
                        split b into c1 if age > 50, c2 if age <= 50; 
                        split c1 into d1 if name < 'm', d2 if name >= 'm';
                        f = group d1 by name;
                        f1 = foreach f generate flatten(group), MAX(d1.contributions);
                        store f1 into ':OUTPATH:.1';
                        g = group d2 by (name, age);
                        g1 = foreach g generate flatten(group), COUNT(d2);
                        store g1 into ':OUTPATH:.2'; 
                        e = group c2 by (name, age);
                        e1 = foreach e generate flatten(group), SUM(c2.contributions);
                        store e1 into ':OUTPATH:.3'; #,
            'sql' => "select name, max(contributions) from votertab10k where (age > 50 and name < 'm') group by name;
                      select name, age, count(*) from votertab10k where (age > 50 and name >= 'm') group by name, age;
                      select name, age, sum(contributions) from votertab10k where age <= 50 group by name, age;",
            },
            # Pig-976: Multi-query optimization throws ClassCastException
            {
            'num' => 24,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:float);
                        b = group a by name;
                        c = group a by age;
                        d = foreach b generate MAX(a.age);
                        e = foreach c generate group, SUM(a.gpa);
                        store d into ':OUTPATH:.1';
                        store e into ':OUTPATH:.2'; #, 
            'sql' => "select max(age) from studenttab10k group by name;
                      select age, sum(gpa) from studenttab10k group by age;",
            },
            # Pig-976: Multi-query optimization throws ClassCastException
            {
            'num' => 25,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:float);
                        b = group a all;
                        c = group a by age;
                        d = foreach b generate COUNT(a), MAX(a.age);
                        e = foreach c generate group, SUM(a.gpa);
                        store d into ':OUTPATH:.1';
                        store e into ':OUTPATH:.2'; #, 
            'sql' => "select count(*), max(age) from studenttab10k;
                      select age, sum(gpa) from studenttab10k group by age;",
            },
            # Pig-983: multi-query optimization on multiple group bys following a join or cogroup
            {
            'num' => 26,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:float);
                        b = load ':INPATH:/singlefile/votertab10k' as (name:chararray, age:int, registration, contributions:double);
                        c = join a by name, b by name;
                        d = group c by a::age;
                        e = group c by b::age;
                        d1 = foreach d generate group, COUNT(c), MAX(c.a::gpa);
                        e1 = foreach e generate group, SUM(c.b::contributions);
                        store d1 into ':OUTPATH:.1';
                        store e1 into ':OUTPATH:.2'; #, 
            'sql' => "select a.age, count(*), max(a.gpa) from studenttab10k as a inner join votertab10k as b on (a.name = b.name) group by a.age;
                      select b.age, sum(b.contributions) from studenttab10k as a inner join votertab10k as b on (a.name = b.name) group by b.age;",
            },
            # Pig-976: Multi-query optimization throws ClassCastException
            {
            'num' => 27,
            'pig' => q# a = load ':INPATH:/singlefile/studenttab10k' as (name:chararray, age:int, gpa:float);
                        b = group a by name;
                        c = group a by age;
                        d = foreach b generate MAX(a.age), group;
                        e = foreach c generate group, SUM(a.gpa);
                        store d into ':OUTPATH:.1';
                        store e into ':OUTPATH:.2'; #, 
            'sql' => "select max(age), name from studenttab10k group by name;
                      select age, sum(gpa) from studenttab10k group by age;",
            },
        ] # end of tests
        },
    ] # end of groups
}
;