Create list of planned optimizations

[Totktonada]

• optimize offset
• join reordering (default: top to bottom, but when there is an index in a nested level: reorder execution)
  • further task: evaluate selectivity
• we can start with simple join loop
• block nested loop
• map-reduce + pushdown conditions
• determine index name when compile query for top-level objects when it has certain list of non-null arguments

[Totktonada]

optimize offset

Now we use offset of a primary key type (done in the scope of #12).

join reordering (default: top to bottom, but when there is an index in a nested level: reorder execution)
further task: evaluate selectivity

Tracked by #235.

we can start with simple join loop
block nested loop

Tracked by #21.

map-reduce + pushdown conditions

Tracked by #18.

determine index name when compile query for top-level objects when it has certain list of non-null arguments

Done in the scope of #38.