113 lines
3.5 KiB
Ruby
113 lines
3.5 KiB
Ruby
# frozen_string_literal: true
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module Gitlab
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module Database
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module SchemaHelpers
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def create_trigger_function(name, replace: true)
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replace_clause = optional_clause(replace, "OR REPLACE")
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execute(<<~SQL)
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CREATE #{replace_clause} FUNCTION #{name}()
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RETURNS TRIGGER AS
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$$
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BEGIN
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#{yield}
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END
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$$ LANGUAGE PLPGSQL
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SQL
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end
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def function_exists?(name)
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connection.select_value("SELECT 1 FROM pg_proc WHERE proname = '#{name}'")
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end
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def create_trigger(table_name, name, function_name, fires:)
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execute(<<~SQL)
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CREATE TRIGGER #{name}
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#{fires} ON #{table_name}
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FOR EACH ROW
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#{yield if block_given?}
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EXECUTE FUNCTION #{function_name}()
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SQL
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end
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def trigger_exists?(table_name, name)
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connection.select_value(<<~SQL)
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SELECT 1
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FROM pg_catalog.pg_trigger trgr
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INNER JOIN pg_catalog.pg_class rel
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ON trgr.tgrelid = rel.oid
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INNER JOIN pg_catalog.pg_namespace nsp
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ON nsp.oid = rel.relnamespace
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WHERE nsp.nspname = #{connection.quote(current_schema)}
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AND rel.relname = #{connection.quote(table_name)}
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AND trgr.tgname = #{connection.quote(name)}
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SQL
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end
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def drop_function(name, if_exists: true)
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exists_clause = optional_clause(if_exists, "IF EXISTS")
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execute("DROP FUNCTION #{exists_clause} #{name}()")
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end
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def drop_trigger(table_name, name, if_exists: true)
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exists_clause = optional_clause(if_exists, "IF EXISTS")
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execute("DROP TRIGGER #{exists_clause} #{name} ON #{table_name}")
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end
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def create_comment(type, name, text)
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execute("COMMENT ON #{type} #{name} IS '#{text}'")
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end
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def tmp_table_name(base)
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hashed_base = Digest::SHA256.hexdigest(base).first(10)
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"#{base}_#{hashed_base}"
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end
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def object_name(table, type)
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identifier = "#{table}_#{type}"
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hashed_identifier = Digest::SHA256.hexdigest(identifier).first(10)
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"#{type}_#{hashed_identifier}"
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end
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def with_lock_retries(*args, **kwargs, &block)
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raise_on_exhaustion = !!kwargs.delete(:raise_on_exhaustion)
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merged_args = {
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connection: connection,
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klass: self.class,
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logger: Gitlab::BackgroundMigration::Logger,
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allow_savepoints: true
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}.merge(kwargs)
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Gitlab::Database::WithLockRetries.new(**merged_args)
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.run(raise_on_exhaustion: raise_on_exhaustion, &block)
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end
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def assert_not_in_transaction_block(scope:)
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return unless transaction_open?
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raise "#{scope} operations can not be run inside a transaction block, " \
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"you can disable transaction blocks by calling disable_ddl_transaction! " \
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"in the body of your migration class"
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end
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private
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def table_for_range_partition(partition_name)
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"#{Gitlab::Database::DYNAMIC_PARTITIONS_SCHEMA}.#{partition_name}"
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end
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def create_range_partition(partition_name, table_name, lower_bound, upper_bound)
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execute(<<~SQL)
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CREATE TABLE #{table_for_range_partition(partition_name)} PARTITION OF #{table_name}
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FOR VALUES FROM (#{lower_bound}) TO (#{upper_bound})
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SQL
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end
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def optional_clause(flag, clause)
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flag ? clause : ""
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end
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end
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end
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end
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