orc-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From wgtmac <...@git.apache.org>
Subject [GitHub] orc pull request #123: ORC-184: Refactor ColumnStatistics classes for writer
Date Mon, 22 May 2017 01:24:32 GMT
Github user wgtmac commented on a diff in the pull request:

    https://github.com/apache/orc/pull/123#discussion_r117649572
  
    --- Diff: c++/src/Statistics.hh ---
    @@ -106,15 +106,50 @@ namespace orc {
     
         void setMinimum(T min) { _minimum = min; }
     
    -    // GET / SET valueCount_
    +    // GET / SET _valueCount
         uint64_t getNumberOfValues() const { return _valueCount; }
     
         void setNumberOfValues(uint64_t numValues) { _valueCount = numValues; }
     
    -    // GET / SET hasNullValue_
    +    // GET / SET _hasNullValue
         bool hasNull() const { return _hasNull; }
     
         void setHasNull(bool hasNull) { _hasNull = hasNull; }
    +
    +    void reset() {
    +      _hasNull = false;
    +      _hasMinimum = false;
    +      _hasMaximum = false;
    +      _hasSum = false;
    +      _hasTotalLength = false;
    +      _totalLength = 0;
    +      _valueCount = 0;
    +    }
    +
    +    // sum is not merged here as we need to check overflow
    +    void merge(const InternalStatisticsImpl& other) {
    +      _hasNull = _hasNull || other._hasNull;
    +      _valueCount += other._valueCount;
    +
    +      if (other._hasMinimum) {
    +        if (!_hasMinimum) {
    +          _hasMinimum = _hasMaximum = true;
    +          _minimum = other._minimum;
    +          _maximum = other._maximum;
    +        } else {
    +          // all template types should support operator<
    +          if (_maximum < other._maximum) {
    --- End diff --
    
    If we declare the template function in the Common.hh and define it in Common.cc. Then
we have to declare it for every type as the template function is instantiated in Common.o
while used in Statistics.o. 


---
If your project is set up for it, you can reply to this email and have your
reply appear on GitHub as well. If your project does not have this feature
enabled and wishes so, or if the feature is enabled but not working, please
contact infrastructure at infrastructure@apache.org or file a JIRA ticket
with INFRA.
---

Mime
View raw message