feat: pushdown filters for some information_schema tables #3091
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What's changed and what's your intention?
Some tables in
information_schema
will be large in the production when there are many created tables, such ascolumns
andtables
etc.This PR supports pushing down query filters for some information_schema tables, it would reduce the memory consumption while constructing the result stream and speed up the query.
Currently it supports following filters:
Eq
NotEq
InList
expr AND expr
expr OR expr
NOT expr
expr LIKE pattern
We can support more types in the future. Looks like datafusion doesn't push down
like
expression currently. @waynexiaChecklist
Refer to a related PR or issue link (optional)
#2931