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From "Prasanth J (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-5272) Column statistics on a invalid column name results in IndexOutOfBoundsException
Date Wed, 11 Sep 2013 19:12:57 GMT
Prasanth J created HIVE-5272:
--------------------------------

             Summary: Column statistics on a invalid column name results in IndexOutOfBoundsException
                 Key: HIVE-5272
                 URL: https://issues.apache.org/jira/browse/HIVE-5272
             Project: Hive
          Issue Type: Bug
          Components: Statistics
    Affects Versions: 0.13.0
            Reporter: Prasanth J
            Assignee: Prasanth J
             Fix For: 0.13.0


When invalid column name is specified for column statistics IndexOutOfBoundsException is thrown.

{code}hive> analyze table customer_staging compute statistics for columns c_first_name,
invalid_name, c_customer_sk;
FAILED: IndexOutOfBoundsException Index: 2, Size: 1{code}
If the invalid column name appears at first or last then INVALID_COLUMN_REFERENCE is thrown
at query planning stage. But if the invalid column name appears somewhere in the middle of
column lists then IndexOutOfBoundsException is thrown at semantic analysis step. The problem
is with getTableColumnType() and getPartitionColumnType() methods. The following segment 
{code}    for (int i=0; i <numCols; i++) {
      colName = colNames.get(i);
      for (FieldSchema col: cols) {
        if (colName.equalsIgnoreCase(col.getName())) {
          colTypes.add(i, new String(col.getType()));
        }
      }
    }{code}
is the reason for it. If the invalid column names appears in the middle of column list then
the equalsIgnoreCase() skips the invalid name and increments the i. Since the list is not
initialized it results in exception. 



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