Uploaded image for project: 'Calcite'
  1. Calcite
  2. CALCITE-4073

Add a new component RexNormalize for more effect rex nodes normalization

    XMLWordPrintableJSON

    Details

      Description

      Currently, we only have simple normalization such as:

      $2 = $1 => $1 = $2
      $2 > $1 => $1 < $2

      we can extend the logic to more like:

      • put the complex predicates behind, like OR(OR(udf($1), $2), $3) => OR($3, OR(udf($1), $2))
      • put the udf operand behind, like OR(udf($1), $2) => OR($2, udf($1))
      • put the local variables that appears more frequently in the front, which is more user-friendly to code generation because the variable can be cached and reused.

      Also note that, we should allows flexible configuration for switch this function on/off(not a system calcite property now) for downstream users and projects(because the normalization may have some performance trade-off).

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                danny0405 Danny Chen
                Reporter:
                danny0405 Danny Chen
              • Votes:
                0 Vote for this issue
                Watchers:
                6 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved:

                  Time Tracking

                  Estimated:
                  Original Estimate - Not Specified
                  Not Specified
                  Remaining:
                  Remaining Estimate - 0h
                  0h
                  Logged:
                  Time Spent - 6h 20m
                  6h 20m