index, unlogged table使用注意 • AD LOCK，秒杀、消除并发数据冲突 • count(*) 是否存在数据? perform limit 1(FOUND) • 短连接，连接池 • 频繁创建、删除临时表(10.0 ROADMAP) • explain评估结果集, instead count(*)（分页数） • 分页优化cursor instead order by offset

Changes ..................................................................................1245 E.8.3.12. JDBC Changes.................................................................................1246 E.8.3 ..................................................................................1265 E.17.3.13. JDBC..............................................................................................1265 ..................................................................................1280 E.24.3.17. JDBC..............................................................................................1280

Changes ...........................................................................1165 E.8.3.12. JDBC Changes..........................................................................1165 E.8.3.13. Miscellaneous ..................................................................................1184 E.17.3.13. JDBC.......................................................................................1184 E.17.3 ..........................................................................1197 xxiii E.24.3.17. JDBC.......................................................................................1197 E.24.3

Changes ................................................................................1403 E.48.3.12. JDBC Changes...............................................................................1403 E.48.3 ..................................................................................1433 E.70.3.13. JDBC..............................................................................................1434 ..................................................................................1450 E.79.3.17. JDBC..............................................................................................1450

Changes ................................................................................1362 E.16.3.12. JDBC Changes...............................................................................1363 E.16.3 ..................................................................................1386 E.28.3.13. JDBC..............................................................................................1386 ..................................................................................1402 E.37.3.17. JDBC..............................................................................................1402

Changes ..............................................................................1584 E.105.3.12. JDBC Changes.............................................................................1585 E.105.3.13 .................................................................................1615 E.127.3.13. JDBC............................................................................................1615 E .................................................................................1631 E.136.3.17. JDBC............................................................................................1632 E

Changes ................................................................................1549 E.80.3.12. JDBC Changes...............................................................................1549 E.80.3 .................................................................................1579 E.102.3.13. JDBC............................................................................................1580 E .................................................................................1596 E.111.3.17. JDBC............................................................................................1596 E

Changes ..............................................................................1801 E.130.3.12. JDBC Changes.............................................................................1802 E.130.3.13 .................................................................................1832 E.152.3.13. JDBC............................................................................................1832 E .................................................................................1848 E.161.3.17. JDBC............................................................................................1849 E

libpq Changes .......................................................................1697 E.130.3.12. JDBC Changes......................................................................1698 E.130.3.13. Miscellaneous .................................................................................1726 E.152.3.13. JDBC.....................................................................................1726 E.152.3.14 .................................................................................1741 E.161.3.17. JDBC.....................................................................................1741 E.161.3.18

libpq Changes .......................................................................1893 E.153.3.12. JDBC Changes......................................................................1894 E.153.3.13. Miscellaneous .................................................................................1922 E.175.3.13. JDBC.....................................................................................1922 E.175.3.14 .................................................................................1937 E.184.3.17. JDBC.....................................................................................1937 E.184.3.18