filter.chMDB {TKCat}

Filter a chMDB object and return a memoMDB

Description

Filter a chMDB object and return a memoMDB

Usage

## S3 method for class '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