[jira] [Created] (DRILL-1672) hbase string comparison handled wrong

["Chun Chang (JIRA)" <ji...@apache.org>]

Chun Chang created DRILL-1672:
---------------------------------

             Summary: hbase string comparison handled wrong
                 Key: DRILL-1672
                 URL: https://issues.apache.org/jira/browse/DRILL-1672
             Project: Apache Drill
          Issue Type: Bug
          Components: Storage - HBase
    Affects Versions: 0.7.0
            Reporter: Chun Chang


#Tue Nov 04 16:58:08 UTC 2014
git.commit.id.abbrev=129cb9c

String is not compared properly:

0: jdbc:drill:schema=hbase> select cast(s.row_key as varchar(20)), cast(s.onecf.name as varchar(30)) name from student s where s.row_key = '10';
+------------+------------+
|   EXPR$0   |    name    |
+------------+------------+
| 10         | victor nixon |
| 100        | bob van buren |
| 1000       | ulysses young |
| 101        | nick carson |
| 102        | ethan ovid |
| 103        | katie thompson |
| 104        | luke polk  |
| 105        | ulysses davidson |
| 106        | bob ovid   |
| 107        | katie robinson |
| 108        | sarah laertes |
| 109        | priscilla xylophone |
+------------+------------+

Here is the plan:

0: jdbc:drill:schema=hbase> explain plan for select cast(s.row_key as varchar(20)), cast(s.onecf.name as varchar(30)) name from student s where s.row_key = '10';
+------------+------------+
|    text    |    json    |
+------------+------------+
| 00-00    Screen
00-01      Project(EXPR$0=[CAST($0):VARCHAR(20) CHARACTER SET "ISO-8859-1" COLLATE "ISO-8859-1$en_US$primary" NOT NULL], name=[CAST($1):VARCHAR(30) CHARACTER SET "ISO-8859-1" COLLATE "ISO-8859-1$en_US$primary"])
00-02        SelectionVectorRemover
00-03          Filter(condition=[=(CAST($0):CHAR(2) CHARACTER SET "ISO-8859-1" COLLATE "ISO-8859-1$en_US$primary" NOT NULL, '10')])
00-04            Project(row_key=[$0], ITEM=[ITEM($1, 'name')])
00-05              Scan(groupscan=[HBaseGroupScan [HBaseScanSpec=HBaseScanSpec [tableName=student, startRow=null, stopRow=null, filter=null], columns=[SchemaPath [`row_key`], SchemaPath [`onecf`.`name`]]]])
 | {
  "head" : {
    "version" : 1,
    "generator" : {
      "type" : "ExplainHandler",
      "info" : ""
    },
    "type" : "APACHE_DRILL_PHYSICAL",
    "options" : [ ],
    "queue" : 0,
    "resultMode" : "EXEC"
  },
  "graph" : [ {
    "pop" : "hbase-scan",
    "@id" : 5,
    "hbaseScanSpec" : {
      "tableName" : "student",
      "startRow" : "",
      "stopRow" : "",
      "serializedFilter" : null
    },
    "storage" : {
      "type" : "hbase",
      "config" : {
        "hbase.zookeeper.quorum" : "10.10.100.113,10.10.100.114,10.10.100.115",
        "hbase.zookeeper.property.clientPort" : "5181"
      },
      "size.calculator.enabled" : false,
      "enabled" : true
    },
    "columns" : [ "`row_key`", "`onecf`.`name`" ],
    "cost" : 1048576.0
  }, {
    "pop" : "project",
    "@id" : 4,
    "exprs" : [ {
      "ref" : "`row_key`",
      "expr" : "`row_key`"
    }, {
      "ref" : "`ITEM`",
      "expr" : "`onecf`.`name`"
    } ],
    "child" : 5,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 1048576.0
  }, {
    "pop" : "filter",
    "@id" : 3,
    "child" : 4,
    "expr" : "equal(cast( (`row_key` ) as VARCHAR(2) ), '10') ",
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 157286.4
  }, {
    "pop" : "selection-vector-remover",
    "@id" : 2,
    "child" : 3,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 157286.4
  }, {
    "pop" : "project",
    "@id" : 1,
    "exprs" : [ {
      "ref" : "`EXPR$0`",
      "expr" : "cast( (`row_key` ) as VARCHAR(20) )"
    }, {
      "ref" : "`name`",
      "expr" : "cast( (`ITEM` ) as VARCHAR(30) )"
    } ],
    "child" : 2,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 157286.4
  }, {
    "pop" : "screen",
    "@id" : 0,
    "child" : 1,
    "initialAllocation" : 1000000,
    "maxAllocation" : 10000000000,
    "cost" : 157286.4
  } ]
} |
+------------+------------+

The filter item is casted as char(2):
Filter(condition=[=(CAST($0):CHAR(2)




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