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# frozen_string_literal: true
module Gitlab
module Database
class PostgresPartition < SharedModel
self.primary_key = :identifier
belongs_to :postgres_partitioned_table, foreign_key: 'parent_identifier', primary_key: 'identifier'
scope :for_identifier, ->(identifier) do
raise ArgumentError, "Partition name is not fully qualified with a schema: #{identifier}" unless identifier =~ /^\w+\.\w+$/
where(primary_key => identifier)
end
scope :by_identifier, ->(identifier) do
for_identifier(identifier).first!
end
scope :for_parent_table, ->(name) { where("parent_identifier = concat(current_schema(), '.', ?)", name).order(:name) }
def self.partition_exists?(table_name)
where("identifier = concat(current_schema(), '.', ?)", table_name).exists?
end
def self.legacy_partition_exists?(table_name)
result = connection.select_value(<<~SQL)
SELECT true FROM pg_class
WHERE relname = '#{table_name}'
AND relispartition = true;
SQL
!!result
end
def to_s
name
end
end
end
end
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