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Filter a chMDB object and return a memoMDB

Usage

# S3 method for chMDB
filter(.data, ..., by = 10^5, .preserve = FALSE)

Arguments

.data

a chMDB object

...

each argument should have the name of one of the tables of the chMDB object and contain a simple logical expression involving the names of the corresponding table.

by

the size of the batch: number of records to filter together (default: 10^5)

.preserve

not used

Value

a memoMDB object