I can see why you would rename.
But this sentence is not correct:
'Hive enforces the predicate pushdown rules by these methods in the
SemanticAnalyzer and JoinPPD classes:'
It should be:
Hive enforces the rules by these methods in the SemanticAnalyzer and JoinPPD
classes:
(The implementation involves both predicate pushdown and analyzing join
conditions)
Sorry about this.
So the link should say 'Hive Outer Join Behavior'
regards,
Harish.
On Dec 10, 2013, at 2:01 PM, Lefty Leverenz <leftylever...@gmail.com> wrote:
> How's this? Hive Implementation
>
> Also, I moved the link on the Design Docs page from Proposed to Other. (It's
> called SQL Outer Join Predicate Pushdown Rules which doesn't match the title,
> but seems okay because it's more descriptive.)
>
> -- Lefty
>
>
> On Tue, Dec 10, 2013 at 7:27 AM, Harish Butani <hbut...@hortonworks.com>
> wrote:
> You are correct, it is plural.
>
> regards,
> Harish.
>
> On Dec 10, 2013, at 4:03 AM, Lefty Leverenz <leftylever...@gmail.com> wrote:
>
>> Okay, then monospace with "()" after the method name is a good way to show
>> them: parseJoinCondition() and getQualifiedAlias() ... but I only found the
>> latter pluralized, instead of singular, so should it be
>> getQualifiedAliases() or am I missing something?
>>
>> trunk> grep -nr 'getQualifiedAlias' ./ql/src/java/* | grep -v 'svn'
>> ./ql/src/java/org/apache/hadoop/hive/ql/ppd/OpProcFactory.java:221: * the
>> comments for getQualifiedAliases function.
>> ./ql/src/java/org/apache/hadoop/hive/ql/ppd/OpProcFactory.java:230:
>> Set<String> aliases = getQualifiedAliases((JoinOperator) nd, owi
>> ./ql/src/java/org/apache/hadoop/hive/ql/ppd/OpProcFactory.java:242:
>> // be pushed down per getQualifiedAliases
>> ./ql/src/java/org/apache/hadoop/hive/ql/ppd/OpProcFactory.java:471:
>> private Set<String> getQualifiedAliases(JoinOperator op, RowResolver rr) {
>>
>>
>> -- Lefty
>>
>>
>> On Mon, Dec 9, 2013 at 2:12 PM, Harish Butani <hbut...@hortonworks.com>
>> wrote:
>> Looks good. Thanks for doing this.
>>
>> Minor point:
>>
>> Rule 1: During QBJoinTree construction in Plan Gen, the parse Join Condition
>> logic applies this rule.
>> Rule 2: During JoinPPD (Join Predicate Pushdown) the get Qualified Alias
>> logic applies this rule.
>>
>> FYI 'parseJoinCondition' and 'getQualifiedAlias' are methods in the
>> SemanticAnalyzer and JoinPPD classes respectively.
>> Writing these as separate words maybe confusing. You are better judge of how
>> to represent this(quoted/bold etc.)
>>
>> regards,
>> Harish.
>>
>>
>> On Dec 9, 2013, at 1:52 AM, Lefty Leverenz <leftylever...@gmail.com> wrote:
>>
>>> The Outer Join Behavior
>>> wikidoc<https://cwiki.apache.org/confluence/display/Hive/OuterJoinBehavior>is
>>>
>>> done, with links from the Design
>>> Docs <https://cwiki.apache.org/confluence/display/Hive/DesignDocs> page and
>>> the Joins
>>> doc<https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Joins#LanguageManualJoins-JoinOptimization>
>>> .
>>>
>>> Harish (or anyone else) would you please review the changes I made to
>>> the definition
>>> for "Null Supplying
>>> table"<https://cwiki.apache.org/confluence/display/Hive/OuterJoinBehavior#OuterJoinBehavior-Definitions>
>>>
>>> ?
>>>
>>> -- Lefty
>>>
>>>
>>> On Mon, Dec 2, 2013 at 6:46 PM, Thejas Nair <the...@hortonworks.com> wrote:
>>>
>>>> :)
>>>>
>>>>
>>>> On Mon, Dec 2, 2013 at 6:18 PM, Lefty Leverenz <leftylever...@gmail.com>
>>>> wrote:
>>>>> Easy as 3.14159.... (I can take a hint.)
>>>>>
>>>>> -- Lefty
>>>>>
>>>>>
>>>>> On Mon, Dec 2, 2013 at 5:34 PM, Thejas Nair <the...@hortonworks.com>
>>>> wrote:
>>>>>
>>>>>> FYI, Harish has a written a very nice doc describing predicate push
>>>>>> down rules for join. I have attached it to the design doc page. It
>>>>>> will be very useful for anyone looking at joins.
>>>>>>
>>>>>>
>>>> https://cwiki.apache.org/confluence/download/attachments/27362075/OuterJoinBehavior.html
>>>>>>
>>>>>> (any help converting it to wiki format from html is welcome!).
>>>>>>
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