reset_pk_sequence!(table, pk = nil, sequence = nil)
public
Resets the sequence of a table’s primary key to the maximum value.
# File activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb, line 312
def reset_pk_sequence!(table, pk = nil, sequence = nil) #:nodoc:
unless pk and sequence
default_pk, default_sequence = pk_and_sequence_for(table)
pk ||= default_pk
sequence ||= default_sequence
end
if @logger && pk && !sequence
@logger.warn "#{table} has primary key #{pk} with no default sequence"
end
if pk && sequence
quoted_sequence = quote_table_name(sequence)
select_value SELECT setval('#{quoted_sequence}', (SELECT COALESCE(MAX(#{quote_column_name pk})+(SELECT increment_by FROM #{quoted_sequence}), (SELECT min_value FROM #{quoted_sequence})) FROM #{quote_table_name(table)}), false), 'SCHEMA'
end
end