CREATE TABLE t1(a, b);
CREATE INDEX i1 ON t1(a);
INSERT INTO t1 VALUES(1, 'xxx');
INSERT INTO t1 SELECT a+1, b FROM t1;
INSERT INTO t1 SELECT a+2, b FROM t1;
INSERT INTO t1 SELECT a+4, b FROM t1;
INSERT INTO t1 SELECT a+8, b FROM t1;
INSERT INTO t1 SELECT a+16, b FROM t1;
INSERT INTO t1 SELECT a+32, b FROM t1;
INSERT INTO t1 SELECT a+64, b FROM t1;
ANALYZE;