tests/queries/joins_1.mrql

/**
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 * 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,
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 * See the License for the specific language governing permissions and
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 */

E = source(line,"../tests/data/employee.txt",",",type(<name:string,dno:int,address:string>));
D = source(line,"../tests/data/department.txt",",",type(<name:string,dno:int>));

select e.name from e in E where e.dno=10;

sum(select e.dno from e in E);

select n from <dno:10,name:n> in E;

select e.dno+11 from e in E;

select (e.name,d.name) from e in E, d in D where e.dno=d.dno;

select (e.name,d.name) from e in E, d in D where e.dno=d.dno and e.name="John Smith";

select (e.name,d.name) from e in E, d in D where e.dno=d.dno and e.name="John Smith" and d.name="CSE";

select d.name from d in D where all e in (select e from e in E where e.dno=d.dno): e.address="a";

select d.name from d in D where all(select e.address="a" from e in E where e.dno=d.dno);

select e from e in E order by inv(e.dno);

select e from e in E order by e.address;

select (e.name,d.name) from e in E, d in D where e.dno=d.dno order by e.address;

select (k,e) from e in E group by k: e.dno;

(select (k,e) from e in E group by k: e.dno order by k)[1];

(select (k,e) from e in E group by k: e.dno)[10];

(select e from e in E order by e.dno, e.name)[1:2];

select (k,e) from e in E group by k: e.dno order by inv(k);

select (k,count(e)) from e in E group by k: e.dno order by count(e);

all e in E: e.dno > 1;

(select e.dno from e in E)+{9,8};

(select e.dno from e in E order by e.name)+[9,8];

count((select e.dno from e in E)+{9,8}+(select e.dno from e in E));