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development repo for integer hstore replacement in postgres

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One can do: ``` select istore'1 => 10, 2 => 20' * 2; ``` but not ``` select 2 * istore'1 => 10, 2 => 20'; ``` They should be...

There are some aggregates that are still not parallel-safe (namely, `isagg`). They rely on the AVL-tree as an internal state, which makes it slightly more challenging to implement parallel behavior,...

version 0.1.6 doesn't seem to appreciate pg-12: ``` src/bigistore.c:580:58: error: unknown type name ‘FunctionCallInfoData’; did you mean ‘FunctionCallInfoBaseData’? 580 | setup_firstcall(FuncCallContext *funcctx, BigIStore *is, FunctionCallInfoData *fcinfo) | ^~~~~~~~~~~~~~~~~~~~ | FunctionCallInfoBaseData...

bug

Adds `sum_floor` aggregation which is similar to `sum`, but has second parameter which defines lowest possible value.

Rebased and a bit refactored version of #54. Couple of fixes include: * fix allocation size for `pairs` array. It used to allocate more memory than it actually needed; *...

there is no `=` operator for `istore` / `bigistore` because of that certain sql features like `NULLIF` or `EXCEPT` can not be used would be nice to have the ability...