Grokbase Groups Hive commits May 2015
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Repository: hive
Updated Branches:
   refs/heads/master 7368cfda3 -> 2564a92b2


HIVE-10826 : Support min()/max() functions over x preceding and y preceding windowing (Aihua Xu via Ashutosh Chauhan)

Signed-off-by: Ashutosh Chauhan <hashutosh@apache.org>


Project: http://git-wip-us.apache.org/repos/asf/hive/repo
Commit: http://git-wip-us.apache.org/repos/asf/hive/commit/2564a92b
Tree: http://git-wip-us.apache.org/repos/asf/hive/tree/2564a92b
Diff: http://git-wip-us.apache.org/repos/asf/hive/diff/2564a92b

Branch: refs/heads/master
Commit: 2564a92b2921b2cee956cc67a996173b15fcf98e
Parents: 7368cfd
Author: Aihua Xu <aihuaxu@gmail.com>
Authored: Wed May 27 09:26:00 2015 -0700
Committer: Ashutosh Chauhan <hashutosh@apache.org>
Committed: Thu May 28 17:04:48 2015 -0700

----------------------------------------------------------------------
  .../hive/ql/udf/generic/GenericUDAFMax.java | 45 +-
  .../hive/ql/udf/generic/GenericUDAFMin.java | 8 +-
  .../clientpositive/windowing_windowspec2.q | 12 +
  .../clientpositive/windowing_windowspec2.q.out | 868 +++++++++++++++++++
  4 files changed, 911 insertions(+), 22 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hive/blob/2564a92b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java
----------------------------------------------------------------------
diff --git a/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java
index 6b7808a..33600f2 100644
--- a/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java
+++ b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMax.java
@@ -130,9 +130,7 @@ public class GenericUDAFMax extends AbstractGenericUDAFResolver {

      @Override
      public GenericUDAFEvaluator getWindowingEvaluator(WindowFrameDef wFrmDef) {
- BoundaryDef start = wFrmDef.getStart();
- BoundaryDef end = wFrmDef.getEnd();
- return new MaxStreamingFixedWindow(this, start.getAmt(), end.getAmt());
+ return new MaxStreamingFixedWindow(this, wFrmDef);
      }

    }
@@ -168,7 +166,7 @@ public class GenericUDAFMax extends AbstractGenericUDAFResolver {

        public State(AggregationBuffer buf) {
          super(buf);
- maxChain = new ArrayDeque<Object[]>(numPreceding + numFollowing + 1);
+ maxChain = new ArrayDeque<Object[]>(wFrameDef.isStartUnbounded() ? 1 : wFrameDef.getWindowSize());
        }

        @Override
@@ -180,7 +178,7 @@ public class GenericUDAFMax extends AbstractGenericUDAFResolver {
          if (underlying == -1) {
            return -1;
          }
- if (numPreceding == BoundarySpec.UNBOUNDED_AMOUNT) {
+ if (wFrameDef.isStartUnbounded()) {
            return -1;
          }
          /*
@@ -189,7 +187,7 @@ public class GenericUDAFMax extends AbstractGenericUDAFResolver {
           * underlying * wdwSz sz of maxChain = sz of underlying * wdwSz
           */

- int wdwSz = numPreceding + numFollowing + 1;
+ int wdwSz = wFrameDef.getWindowSize();
          return underlying + (underlying * wdwSz) + (underlying * wdwSz)
              + (3 * JavaDataModel.PRIMITIVES1);
        }
@@ -202,8 +200,8 @@ public class GenericUDAFMax extends AbstractGenericUDAFResolver {
      }

      public MaxStreamingFixedWindow(GenericUDAFEvaluator wrappedEval,
- int numPreceding, int numFollowing) {
- super(wrappedEval, numPreceding, numFollowing);
+ WindowFrameDef wFrmDef) {
+ super(wrappedEval, wFrmDef);
      }

      @Override
@@ -235,26 +233,32 @@ public class GenericUDAFMax extends AbstractGenericUDAFResolver {
          }
        }

+ // We need to insert 'null' before processing first row for the case: X preceding and y preceding
+ if (s.numRows == 0) {
+ for (int i = wFrameDef.getEnd().getRelativeOffset(); i < 0; i++) {
+ s.results.add(null);
+ }
+ }
+
        /*
         * add row to chain. except in case of UNB preceding: - only 1 max needs
         * to be tracked. - current max will never become out of range. It can
         * only be replaced by a larger max.
         */
- if (numPreceding != BoundarySpec.UNBOUNDED_AMOUNT
- || s.maxChain.isEmpty()) {
+ if (!wFrameDef.isStartUnbounded() || s.maxChain.isEmpty()) {
          o = o == null ? null : ObjectInspectorUtils.copyToStandardObject(o,
              inputOI(), ObjectInspectorCopyOption.JAVA);
          s.maxChain.addLast(new Object[] { o, s.numRows });
        }

- if (s.numRows >= numFollowing) {
+ if (s.numRows >= wFrameDef.getEnd().getRelativeOffset()) {
          s.results.add(s.maxChain.getFirst()[0]);
        }
        s.numRows++;

        int fIdx = (Integer) s.maxChain.getFirst()[1];
- if (numPreceding != BoundarySpec.UNBOUNDED_AMOUNT
- && s.numRows > fIdx + numPreceding + numFollowing) {
+ if (!wFrameDef.isStartUnbounded()
+ && s.numRows >= fIdx + wFrameDef.getWindowSize()) {
          s.maxChain.removeFirst();
        }
      }
@@ -277,19 +281,26 @@ public class GenericUDAFMax extends AbstractGenericUDAFResolver {
      public Object terminate(AggregationBuffer agg) throws HiveException {

        State s = (State) agg;
- Object[] r = s.maxChain.getFirst();
+ Object[] r = s.maxChain.isEmpty() ? null : s.maxChain.getFirst();

- for (int i = 0; i < numFollowing; i++) {
+ // After all the rows are processed, continue to generate results for the rows that results haven't generated.
+ // For the case: X following and Y following, process first Y-X results and then insert X nulls.
+ // For the case X preceding and Y following, process Y results.
+ for (int i = Math.max(0, wFrameDef.getStart().getRelativeOffset()); i < wFrameDef.getEnd().getRelativeOffset(); i++) {
          s.results.add(r[0]);
          s.numRows++;
          int fIdx = (Integer) r[1];
- if (numPreceding != BoundarySpec.UNBOUNDED_AMOUNT
- && s.numRows - numFollowing + i > fIdx + numPreceding
+ if (!wFrameDef.isStartUnbounded()
+ && s.numRows + i >= fIdx + wFrameDef.getWindowSize()
              && !s.maxChain.isEmpty()) {
            s.maxChain.removeFirst();
            r = !s.maxChain.isEmpty() ? s.maxChain.getFirst() : r;
          }
        }
+ for (int i = 0; i < wFrameDef.getStart().getRelativeOffset(); i++) {
+ s.results.add(null);
+ s.numRows++;
+ }

        return null;
      }

http://git-wip-us.apache.org/repos/asf/hive/blob/2564a92b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMin.java
----------------------------------------------------------------------
diff --git a/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMin.java b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMin.java
index d931d52..816350f 100644
--- a/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMin.java
+++ b/ql/src/java/org/apache/hadoop/hive/ql/udf/generic/GenericUDAFMin.java
@@ -125,9 +125,7 @@ public class GenericUDAFMin extends AbstractGenericUDAFResolver {

      @Override
      public GenericUDAFEvaluator getWindowingEvaluator(WindowFrameDef wFrmDef) {
- BoundaryDef start = wFrmDef.getStart();
- BoundaryDef end = wFrmDef.getEnd();
- return new MinStreamingFixedWindow(this, start.getAmt(), end.getAmt());
+ return new MinStreamingFixedWindow(this, wFrmDef);
      }

    }
@@ -135,8 +133,8 @@ public class GenericUDAFMin extends AbstractGenericUDAFResolver {
    static class MinStreamingFixedWindow extends MaxStreamingFixedWindow {

      public MinStreamingFixedWindow(GenericUDAFEvaluator wrappedEval,
- int numPreceding, int numFollowing) {
- super(wrappedEval, numPreceding, numFollowing);
+ WindowFrameDef wFrmDef) {
+ super(wrappedEval, wFrmDef);
      }

      protected ObjectInspector inputOI() {

http://git-wip-us.apache.org/repos/asf/hive/blob/2564a92b/ql/src/test/queries/clientpositive/windowing_windowspec2.q
----------------------------------------------------------------------
diff --git a/ql/src/test/queries/clientpositive/windowing_windowspec2.q b/ql/src/test/queries/clientpositive/windowing_windowspec2.q
index d85cea9..e77c4eb 100644
--- a/ql/src/test/queries/clientpositive/windowing_windowspec2.q
+++ b/ql/src/test/queries/clientpositive/windowing_windowspec2.q
@@ -28,3 +28,15 @@ select ts, f, count(f) over (partition by ts order by f rows between 2 preceding
  select ts, f, count(f) over (partition by ts order by f rows between unbounded preceding and 1 preceding) from over10k limit 100;
  select ts, f, count(f) over (partition by ts order by f rows between 1 following and 2 following) from over10k limit 100;
  select ts, f, count(f) over (partition by ts order by f rows between unbounded preceding and 1 following) from over10k limit 100;
+
+-- max
+select ts, f, max(f) over (partition by ts order by t rows between 2 preceding and 1 preceding) from over10k limit 100;
+select ts, f, max(f) over (partition by ts order by t rows between unbounded preceding and 1 preceding) from over10k limit 100;
+select ts, f, max(f) over (partition by ts order by t rows between 1 following and 2 following) from over10k limit 100;
+select ts, f, max(f) over (partition by ts order by t rows between unbounded preceding and 1 following) from over10k limit 100;
+
+-- min
+select ts, f, min(f) over (partition by ts order by t rows between 2 preceding and 1 preceding) from over10k limit 100;
+select ts, f, min(f) over (partition by ts order by t rows between unbounded preceding and 1 preceding) from over10k limit 100;
+select ts, f, min(f) over (partition by ts order by t rows between 1 following and 2 following) from over10k limit 100;
+select ts, f, min(f) over (partition by ts order by t rows between unbounded preceding and 1 following) from over10k limit 100;

http://git-wip-us.apache.org/repos/asf/hive/blob/2564a92b/ql/src/test/results/clientpositive/windowing_windowspec2.q.out
----------------------------------------------------------------------
diff --git a/ql/src/test/results/clientpositive/windowing_windowspec2.q.out b/ql/src/test/results/clientpositive/windowing_windowspec2.q.out
index bf91639..b187f35 100644
--- a/ql/src/test/results/clientpositive/windowing_windowspec2.q.out
+++ b/ql/src/test/results/clientpositive/windowing_windowspec2.q.out
@@ -912,3 +912,871 @@ POSTHOOK: Input: default@over10k
  2013-03-01 09:11:58.703072 71.68 23
  2013-03-01 09:11:58.703072 79.46 24
  2013-03-01 09:11:58.703072 80.02 25
+PREHOOK: query: -- max
+select ts, f, max(f) over (partition by ts order by t rows between 2 preceding and 1 preceding) from over10k limit 100
+PREHOOK: type: QUERY
+PREHOOK: Input: default@over10k
+#### A masked pattern was here ####
+POSTHOOK: query: -- max
+select ts, f, max(f) over (partition by ts order by t rows between 2 preceding and 1 preceding) from over10k limit 100
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@over10k
+#### A masked pattern was here ####
+2013-03-01 09:11:58.70307 14.54 NULL
+2013-03-01 09:11:58.70307 29.22 14.54
+2013-03-01 09:11:58.70307 39.48 29.22
+2013-03-01 09:11:58.70307 17.85 39.48
+2013-03-01 09:11:58.70307 31.17 39.48
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+2013-03-01 09:11:58.70307 14.78 78.58
+2013-03-01 09:11:58.70307 91.36 38.61
+2013-03-01 09:11:58.70307 28.69 91.36
+2013-03-01 09:11:58.70307 73.52 91.36
+2013-03-01 09:11:58.70307 92.96 73.52
+2013-03-01 09:11:58.70307 95.04 92.96
+2013-03-01 09:11:58.70307 41.6 95.04
+2013-03-01 09:11:58.70307 64.96 95.04
+2013-03-01 09:11:58.70307 84.71 64.96
+2013-03-01 09:11:58.70307 81.41 84.71
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+2013-03-01 09:11:58.70307 38.35 46.08
+2013-03-01 09:11:58.70307 3.17 40.54
+2013-03-01 09:11:58.703071 0.83 NULL
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+2013-03-01 09:11:58.703072 95.01 NULL
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+2013-03-01 09:11:58.703072 9.0 88.83
+2013-03-01 09:11:58.703072 54.1 88.83
+PREHOOK: query: select ts, f, max(f) over (partition by ts order by t rows between unbounded preceding and 1 preceding) from over10k limit 100
+PREHOOK: type: QUERY
+PREHOOK: Input: default@over10k
+#### A masked pattern was here ####
+POSTHOOK: query: select ts, f, max(f) over (partition by ts order by t rows between unbounded preceding and 1 preceding) from over10k limit 100
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@over10k
+#### A masked pattern was here ####
+2013-03-01 09:11:58.70307 14.54 NULL
+2013-03-01 09:11:58.70307 29.22 14.54
+2013-03-01 09:11:58.70307 39.48 29.22
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+#### A masked pattern was here ####
+POSTHOOK: query: select ts, f, max(f) over (partition by ts order by t rows between 1 following and 2 following) from over10k limit 100
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+#### A masked pattern was here ####
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+#### A masked pattern was here ####
+POSTHOOK: query: select ts, f, max(f) over (partition by ts order by t rows between unbounded preceding and 1 following) from over10k limit 100
+POSTHOOK: type: QUERY
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+#### A masked pattern was here ####
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+PREHOOK: type: QUERY
+PREHOOK: Input: default@over10k
+#### A masked pattern was here ####
+POSTHOOK: query: -- min
+select ts, f, min(f) over (partition by ts order by t rows between 2 preceding and 1 preceding) from over10k limit 100
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@over10k
+#### A masked pattern was here ####
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+PREHOOK: type: QUERY
+PREHOOK: Input: default@over10k
+#### A masked pattern was here ####
+POSTHOOK: query: select ts, f, min(f) over (partition by ts order by t rows between unbounded preceding and 1 preceding) from over10k limit 100
+POSTHOOK: type: QUERY
+POSTHOOK: Input: default@over10k
+#### A masked pattern was here ####
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+#### A masked pattern was here ####
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postedMay 29, '15 at 12:05a
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