29 lines
747 B
MySQL
29 lines
747 B
MySQL
|
-- This script creates a function and indexes that allow osmosis to efficiently query based on transaction ids.
|
||
|
|
CREATE OR REPLACE FUNCTION xid_to_int4(t xid)
|
||
|
|
RETURNS integer AS
|
||
|
|
$BODY$
|
||
|
|
DECLARE
|
||
|
|
tl bigint;
|
||
|
|
ti int;
|
||
|
|
BEGIN
|
||
|
|
tl := t;
|
||
|
|
|
||
|
|
IF tl >= 2147483648 THEN
|
||
|
|
tl := tl - 4294967296;
|
||
|
|
END IF;
|
||
|
|
|
||
|
|
ti := tl;
|
||
|
|
|
||
|
|
RETURN ti;
|
||
|
|
END;
|
||
|
|
$BODY$
|
||
|
|
LANGUAGE 'plpgsql' IMMUTABLE STRICT;
|
||
|
|
|
||
|
|
|
||
|
|
DROP INDEX IF EXISTS nodes_xmin_idx;
|
||
|
|
DROP INDEX IF EXISTS ways_xmin_idx;
|
||
|
|
DROP INDEX IF EXISTS relations_xmin_idx;
|
||
|
|
CREATE INDEX nodes_xmin_idx ON nodes USING btree ((xid_to_int4(xmin)));
|
||
|
|
CREATE INDEX ways_xmin_idx ON ways USING btree ((xid_to_int4(xmin)));
|
||
|
|
CREATE INDEX relations_xmin_idx ON relations USING btree ((xid_to_int4(xmin)));
|