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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-5258) Allow "extended" mock tables access from SQL queries
Date Wed, 22 Feb 2017 01:24:44 GMT

    [ https://issues.apache.org/jira/browse/DRILL-5258?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15877199#comment-15877199
] 

ASF GitHub Bot commented on DRILL-5258:
---------------------------------------

Github user sohami commented on a diff in the pull request:

    https://github.com/apache/drill/pull/752#discussion_r102294277
  
    --- Diff: exec/java-exec/src/main/java/org/apache/drill/exec/store/mock/BooleanGen.java
---
    @@ -0,0 +1,42 @@
    +/*
    + * 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.
    + */
    +package org.apache.drill.exec.store.mock;
    +
    +import java.util.Random;
    +
    +import org.apache.drill.exec.vector.BitVector;
    +import org.apache.drill.exec.vector.ValueVector;
    +
    +public class BooleanGen implements FieldGen {
    +
    +  Random rand = new Random( );
    +
    +  @Override
    +  public void setup(ColumnDef colDef) { }
    +
    +  public int value( ) {
    --- End diff --
    
    Extra space between `()`


> Allow "extended" mock tables access from SQL queries
> ----------------------------------------------------
>
>                 Key: DRILL-5258
>                 URL: https://issues.apache.org/jira/browse/DRILL-5258
>             Project: Apache Drill
>          Issue Type: Improvement
>    Affects Versions: 1.10
>            Reporter: Paul Rogers
>            Assignee: Paul Rogers
>            Priority: Minor
>             Fix For: 1.10
>
>
> DRILL-5152 provided a simple way to generate sample data in SQL using a new, simplified
version of the mock data generator. This approach is very convenient, but is inherently limited.
For example, the limited syntax available in SQL does not encoding much information about
columns such as repeat count, data generator or so on. The simple SQL approach does not allow
generating multiple groups of data.
> However, all these features are present in the original mock data source via a special
JSON configuration file. Previously, only physical plans could access that extended syntax.
> This ticket requests a SQL interface to the extended mock data source:
> {code}
> SELECT * FROM `mock`.`example/mock-options.json`
> {code}
> Mock data source options are always stored as a JSON file. Since the existing mock data
generator for SQL never uses JSON files, a simple rule is that if the table name ends in ".json"
then it is a specification, else the information is encoded in table and column names.
> The format of the data generation syntax is documented in the mock data source classes.



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