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Posted to gitbox@hive.apache.org by GitBox <gi...@apache.org> on 2020/03/02 22:32:40 UTC
[GitHub] [hive] jcamachor commented on a change in pull request #930:
HIVE-22940 datasketches functions
jcamachor commented on a change in pull request #930: HIVE-22940 datasketches functions
URL: https://github.com/apache/hive/pull/930#discussion_r386691018
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File path: ql/src/java/org/apache/hadoop/hive/ql/exec/DataSketchesFunctions.java
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@@ -0,0 +1,218 @@
+package org.apache.hadoop.hive.ql.exec;
+
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFResolver2;
+import org.apache.hadoop.hive.ql.udf.generic.GenericUDTF;
+
+public class DataSketchesFunctions {
+
+ private static final String DATA_TO_SKETCH = "datatosketch";
+ private static final String SKETCH_TO_ESTIMATE_WITH_ERROR_BOUNDS = "sketchToEstimateWithErrorBounds";
+ // FIXME: consider to rename it to simply "estimate" or "evaluate" - in case of the counting sketches the "sketchto..." doesnt add value
+ private static final String SKETCH_TO_ESTIMATE = "sketchToEstimate";
+ private static final String SKETCH_TO_STRING = "sketchToString";
+ // FIXME: probably use simply "union" instead unionSketch?
+ private static final String UNION_SKETCH = "unionSketch";
+ private static final String GET_N = "getN";
+ private static final String GET_CDF = "getCdf";
+ private static final String GET_PMF = "getPmf";
+ private static final String GET_QUANTILES = "GetQuantiles";
+ private static final String GET_QUANTILE = "GetQuantile";
+ private static final String GET_RANK = "getRank";
+ private static final String INTERSECT_SKETCH = "intersection";
+ private static final String EXCLUDE_SKETCH = "exclude";
+ private static final String GET_K = "getK";
+ private static final String GET_FREQUENT_ITEMS = "getFrequentItems";
+ private static final String T_TEST = "TTest";
+ private static final String SKETCH_TO_MEANS = "sketchtomeans";
+ private static final String SKETCH_TO_NUMBER_OF_RETAINED_ENTRIES = "sketchtonumberofretainedentries";
Review comment:
`get_number_retained_entries` ?
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