BIND 10 #324: improve SQL data source performance

[BIND 10 Development]

#324: improve SQL data source performance
-------------------------------------+-------------------------------------
                   Reporter:  each   |                 Owner:  UnAssigned
                       Type:         |                Status:  assigned
  enhancement                        |             Milestone:
                   Priority:         |  Sprint-20120403
  medium                             |            Resolution:
                  Component:  data   |             Sensitive:  0
  source                             |           Sub-Project:  DNS
                   Keywords:         |  Estimated Difficulty:  5
  performance                        |           Total Hours:  0
            Defect Severity:  N/A    |
Feature Depending on Ticket:         |
  sqlite schema upgrade              |
        Add Hours to Ticket:  0      |
                  Internal?:  0      |
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Comment (by jelte):

 in ticket #1846, we temporarily hardcoded the dbutil to return '1' as the
 current version, and disabled a number of tests related to the upgrade
 checking. When this ticket is done, those changes should be reversed (grep
 for 'Temporarily' in src/bin/dbutil and src/bin/dbutil/tests should point
 out all the cases)

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Ticket URL: <https://bind10.isc.org/ticket/324#comment:17>
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