OPAL Projection Verbs

Projection verbs create, remove, or rename columns in a dataset.

Verb

Description

drop_col

Exclude one or more columns from the input dataset to the output dataset.

extract_regex

Add one or more columns by matching capture names in a regular expression against a given source expression.

make_col

Add one or more new columns from the input dataset to the output dataset.

pick_col

Exclude all columns except the specified columns from the input dataset to the output dataset.

rename_col

Include all columns while renaming the specified columns from the input dataset to the output dataset.