gistfile1.txt

est=# CREATE TABLE test (id serial, condition_geo geography);
CREATE TABLE
test=# INSERT INTO test (condition_geo) VALUES (ST_Buffer(ST_GeogFromWKB(ST_MakePoint(20.0,30.0)),10.0));
INSERT 0 1
test=# SELECT id FROM test WHERE ST_Intersects("condition_geo", ST_Buffer(ST_GeogFromText('POINT(20.0 30.0)'), 20.0)) IS TRUE;
 id
----
  1
(1 row)

test=# INSERT INTO test (condition_geo) VALUES (ST_Buffer(ST_GeogFromWKB(ST_MakePoint(20.0,30.0)),10.0));
INSERT 0 1
test=# SELECT id FROM test WHERE ST_Intersects("condition_geo", ST_Buffer(ST_GeogFromText('POINT(20.0 30.0)'), 20.0)) IS TRUE;
 id
----
  1
(1 row)

test=# SELECT id FROM test WHERE ST_Intersects("condition_geo", ST_Buffer(ST_GeogFromText('POINT(20.0 30.0)'), 20.0)) IS TRUE AND id = 2;
 id
----
  2
(1 row)