filter.chMDB | R Documentation |
Filter a chMDB object and return a memoMDB
## S3 method for class 'chMDB'
filter(.data, ..., by = 10^5, .preserve = FALSE)
.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 |
a memoMDB object
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