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    • Tom Lane's avatar
      Revise aggregate functions per earlier discussions in pghackers. · bec98a31
      Tom Lane authored
      There's now only one transition value and transition function.
      NULL handling in aggregates is a lot cleaner.  Also, use Numeric
      accumulators instead of integer accumulators for sum/avg on integer
      datatypes --- this avoids overflow at the cost of being a little slower.
      Implement VARIANCE() and STDDEV() aggregates in the standard backend.
      
      Also, enable new LIKE selectivity estimators by default.  Unrelated
      change, but as long as I had to force initdb anyway...
      bec98a31
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