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Version 1.9 Build 1556

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Possible future developments

In the near or far future TaQL will be enhanced by adding new features and by doing optimizations.

• If a branch in an OR or AND node is a constant scalar, it might be possible to reduce the node to one of its branches.
• Optimize by removing an IN node if the righthand operand is empty. This cannot be done if the lefthand operand is variable shaped.
• Handle invalid subexpressions (e.g. exceeding array bounds) as undefined values which can be tested with the function ISDEFINED.
• Interpret column units defined in a column keyword UNIT.
• Maybe functions to convert positions from one equinox or system to another (using the Measures system).
• Optimize using a B+ tree index.
• Expressions in the selected column-list to calculate new columns. E.g.
  SELECT SQUARE(UVW[1])+SQUARE(UVW[2]) UVWNORM FROM ...
  where UVWNORM is the name for that new column.