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Size: 583 Bytes
Versions: 9
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Stored size: 583 Bytes
Contents
Extend its operand with an unique autonumber attribute
SYNOPSIS
#(signature)
DESCRIPTION
This non-relational operator guarantees uniqueness of output tuples by adding
an attribute called AS whose value is an auto-numbered Integer.
If the presence of duplicates was the only "non-relational" aspect of the input,
the result is a valid relation for which AS is a candidate key.
EXAMPLE
# Autonumber suppliers with default attribute name
!(alf autonum suppliers)
# Autonumber suppliers with a `unique_id` attribute
!(alf autonum suppliers -- unique_id)
Version data entries
9 entries across 9 versions & 2 rubygems