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10g full join 优化
今天一个女生咨询我报名学优化。聊着聊着就让我优化一个sql，贴给大家看一下
select (case
when grouping(allwo.workshop_code) = 1 then
‘‘
else
nvl(max(allwo.workshop_code), ‘未维护车间‘)
end) workshop_code,
DECODE(TO_NUMBER(substr(Item_code,
4,
INSTR(Item_code, ‘M‘, 1, 2) - 4)) / 10,
NULL,
‘合计‘,
TO_NUMBER(substr(Item_code, 4, INSTR(Item_code, ‘M‘, 1, 2) - 4)) / 10 || ‘M‘) xiangsu,
(case
when grouping(item_code) = 1 then
‘‘
else
max(part_spec)
end) part_spec,
(case
when grouping(item_code) = 1 then
‘‘
else
max(type)
end) type,
nvl(wo_code, ‘‘) wo_code,
sum(qty) qty,
sum(UsedQty) qx,
sum(db) db,
sum(wb) wb,
sum(HM) HM,
sum(成品站) 成品站,
sum(烘烤) 烘烤,
sum(十级产出) 十级产出,
sum(分粒接收) 分粒接收,
sum(分粒修边) 分粒修边,
sum(焊接) 焊接,
sum(喷码打标) 喷码打标,
sum(撕膜) 撕膜,
sum(调焦) 调焦,
sum(点胶) 点胶,
sum(点胶全检) 点胶全检,
sum(功测一) 功测一,
sum(功测接收修复) 功测接收修复,
sum(功测二) 功测二,
sum(QC功测) QC功测,
sum(远焦烧录) 远焦烧录,
sum(近焦烧录) 近焦烧录,
sum(OTP烧录) OTP烧录,
sum(OTP检测) OTP检测,
sum(QCOTP烧录) QCOTP烧录,
sum(背胶) 背胶,
sum(外观) 外观,
sum(OS测试) OS测试,
sum(CCD检验) CCD检验,
sum(贴膜) 贴膜,
sum(包装) 包装,
sum(包装入库) 包装入库,
sum(修复接收) 修复接收,
sum(修复维修) 修复维修,
sum(脏点测试) 脏点测试,
sum(修复焊接) 修复焊接,
sum(修复修边) 修复修边,
sum(修复调焦) 修复调焦,
sum(修复功能测试) 修复功能测试,
sum(修复转出) 修复转出
from (select COALESCE(wocode,
gxcl.wo_code,
bz.wo_code,
xiufujieshou.wo_code) wocode,
nvl(UsedQty, 0) UsedQty,
nvl(db, 0) db,
nvl(wb, 0) wb,
nvl(成品站, 0) 成品站,
nvl(HM, 0) HM,
nvl(烘烤, 0) 烘烤,
nvl(十级产出, 0) 十级产出,
nvl(分粒接收, 0) 分粒接收,
nvl(分粒修边, 0) 分粒修边,
nvl(焊接, 0) 焊接,
nvl(喷码打标, 0) 喷码打标,
nvl(撕膜, 0) 撕膜,
nvl(调焦, 0) 调焦,
nvl(点胶, 0) 点胶,
nvl(点胶全检, 0) 点胶全检,
nvl(功测一, 0) 功测一,
nvl(功测接收修复, 0) 功测接收修复,
nvl(功测二, 0) 功测二,
nvl(QC功测, 0) QC功测,
nvl(远焦烧录, 0) 远焦烧录,
nvl(近焦烧录, 0) 近焦烧录,
nvl(OTP烧录, 0) OTP烧录,
nvl(OTP检测, 0) OTP检测,
nvl(QCOTP烧录, 0) QCOTP烧录,
nvl(背胶, 0) 背胶,
nvl(外观, 0) 外观,
nvl(OS测试, 0) OS测试,
nvl(CCD检验, 0) CCD检验,
nvl(贴膜, 0) 贴膜,
nvl(修复接收, 0) 修复接收,
nvl(修复维修, 0) 修复维修,
nvl(脏点测试, 0) 脏点测试,
nvl(修复焊接, 0) 修复焊接,
nvl(修复修边, 0) 修复修边,
nvl(修复调焦, 0) 修复调焦,
nvl(修复功能测试, 0) 修复功能测试,
nvl(修复转出, 0) 修复转出,
nvl(包装入库, 0) 包装入库,
nvl(包装, 0) 包装
from (SELECT WO_CODE AS WoCode, sum(USED_QTY) AS UsedQty
FROM T_SN2UPN
where (mat_code like ‘MFY%‘ OR mat_code like ‘EMBY%‘)
and MDATE >=
to_date(‘2014-04-27 08:30‘, ‘yyyy-mm-dd hh24:mi:ss‘)
AND MDATE <=
to_date(‘2014-04-28 08:30‘, ‘yyyy-mm-dd hh24:mi:ss‘)
and SUBSTR(TO_CHAR(MDATE + 30 / 1440, ‘YYYYMMDDHH24MISS‘),
9,
2) >= 9
AND SUBSTR(TO_CHAR(MDATE + 30 / 1440, ‘YYYYMMDDHH24MISS‘),
9,
2) < 21
group by Wo_Code) qx
full join (select A.item_code,
A.wo_code,
C.PIXEL,
SUM(case
when a.op_code = ‘DB‘ THEN
OK_QTY
ELSE
0
END) DB,
SUM(case
when a.op_code = ‘WB后全检‘ THEN
OK_QTY
ELSE
0
END) WB,
SUM(case
when a.op_code in
(‘半成品组装‘, ‘组装LENS‘, ‘VCM封合‘) THEN
OK_QTY
ELSE
0
END) 成品站,
SUM(case
when a.op_code = ‘H/M‘ THEN
OK_QTY
ELSE
0
END) HM,
SUM(case
when a.op_code = ‘烘烤‘ THEN
OK_QTY
ELSE
0
END) 烘烤,
SUM(case
when a.op_code = ‘十级转出‘ THEN
OK_QTY
ELSE
0
END) 十级产出,
SUM(case
when a.op_code = ‘分粒接收‘ THEN
OK_QTY
ELSE
0
END) 分粒接收,
SUM(case
when a.op_code = ‘修边‘ THEN
OK_QTY
ELSE
0
END) 分粒修边,
SUM(case
when a.op_code = ‘马达焊接‘ THEN
OK_QTY
ELSE
0
END) 焊接,
SUM(case
when a.op_code = ‘打标‘ THEN
OK_QTY
ELSE
0
END) 喷码打标,
SUM(case
when a.op_code = ‘撕膜‘ THEN
OK_QTY
ELSE
0
END) 撕膜,
SUM(case
when a.op_code = ‘调焦‘ THEN
OK_QTY
ELSE
0
END) 调焦,
SUM(case
when a.op_code = ‘点螺纹胶及UV固化‘ THEN
OK_QTY
ELSE
0
END) 点胶,
SUM(case
when a.op_code = ‘点UV胶后全检胶量‘ THEN
OK_QTY
ELSE
0
END) 点胶全检,
SUM(case
when a.op_code = ‘功能测试‘ THEN
OK_QTY
ELSE
0
END) 功测一,
SUM(case
when a.op_code = ‘功能测试接收(修复)‘ THEN
OK_QTY
ELSE
0
END) 功测接收修复,
SUM(case
when a.op_code = ‘功能测试02‘ THEN
OK_QTY
ELSE
0
END) 功测二,
SUM(case
when a.op_code = ‘QC功能检‘ THEN
OK_QTY
ELSE
0
END) QC功测,
SUM(case
when a.op_code = ‘远焦烧录‘ THEN
OK_QTY
ELSE
0
END) 远焦烧录,
SUM(case
when a.op_code = ‘近焦烧录‘ THEN
OK_QTY
ELSE
0
END) 近焦烧录,
SUM(case
when a.op_code = ‘OTP烧录‘ THEN
OK_QTY
ELSE
0
END) OTP烧录,
SUM(case
when a.op_code = ‘OTP检测‘ THEN
OK_QTY
ELSE
0
END) OTP检测,
SUM(case
when a.op_code = ‘QC OTP检测‘ THEN
OK_QTY
ELSE
0
END) QCOTP烧录,
SUM(case
when a.op_code = ‘贴背胶‘ THEN
OK_QTY
ELSE
0
END) 背胶,
SUM(case
when a.op_code = ‘外观检查‘ THEN
OK_QTY
ELSE
0
END) 外观,
SUM(case
when a.op_code = ‘O/S测试‘ THEN
OK_QTY
ELSE
0
END) OS测试,
SUM(case
when a.op_code = ‘CCD检验‘ THEN
OK_QTY
ELSE
0
END) CCD检验,
SUM(case
when a.op_code = ‘贴膜‘ THEN
OK_QTY
ELSE
0
END) 贴膜,
SUM(case
when a.op_code = ‘修复维修‘ THEN
OK_QTY
ELSE
0
END) 修复维修,
SUM(case
when a.op_code = ‘脏点测试‘ THEN
OK_QTY
ELSE
0
END) 脏点测试,
SUM(case
when a.op_code = ‘修复焊接‘ THEN
OK_QTY
ELSE
0
END) 修复焊接,
SUM(case
when a.op_code = ‘修复修边‘ THEN
OK_QTY
ELSE
0
END) 修复修边,
SUM(case
when a.op_code = ‘修复调焦‘ THEN
OK_QTY
ELSE
0
END) 修复调焦,
SUM(case
when a.op_code = ‘修复功能测试‘ THEN
OK_QTY
ELSE
0
END) 修复功能测试,
SUM(case
when a.op_code = ‘修复功能测试‘ THEN
OK_QTY
ELSE
0
END) 修复转出
from t_resume a, i_material c
WHERE a.item_code = c.part_code
AND (a.rcard, a.op_code, a.actionseq) in
(select rcard, op_code, max(actionseq) actionseq
from t_resume
where MDATE >=
to_date(‘2014-04-27 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘)
AND MDATE <=
to_date(‘2014-04-28 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘)
group by rcard, op_code)
AND A.WO_CODE = ‘MN1-14040158‘
GROUP BY A.ITEM_CODE, A.WO_CODE, C.PIXEL
) gxcl
on qx.WoCode = gxcl.wo_code
full join (select substr(rcard, 1, 12) wo_code,
sum(case
when (IS_PACKING = 1 and
a.PACKING_DATE >=
to_date(‘2014-04-27 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘) AND
a.PACKING_DATE <=
to_date(‘2014-04-28 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘)) and
SUBSTR(TO_CHAR(a.PACKING_DATE + 30 / 1440,
‘YYYYMMDDHH24MISS‘),
9,
2) >= 9 AND
SUBSTR(TO_CHAR(PACKING_DATE + 30 / 1440,
‘YYYYMMDDHH24MISS‘),
9,
2) < 21 then
used_qty
else
0
end) 包装,
sum(case
when (IS_BZTOSTOCK = 1 and
a.BZTOSTOCK_DATE >=
to_date(‘2014-04-27 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘) AND
a.BZTOSTOCK_DATE <=
to_date(‘2014-04-28 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘)) and
SUBSTR(TO_CHAR(a.BZTOSTOCK_DATE + 30 / 1440,
‘YYYYMMDDHH24MISS‘),
9,
2) >= 9 AND
SUBSTR(TO_CHAR(BZTOSTOCK_DATE + 30 / 1440,
‘YYYYMMDDHH24MISS‘),
9,
2) < 21 then
used_qty
else
0
end) 包装入库
from (select *
from T_CARTON
where status IS NULL
and workshop_code = ‘生产二区‘) a
inner join t_carton2SN b
on a.carton_no = b.carton_no
AND ((a.BZTOSTOCK_DATE >=
to_date(‘2014-04-27 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘) AND
a.BZTOSTOCK_DATE <=
to_date(‘2014-04-28 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘)) OR
(a.PACKING_DATE >=
to_date(‘2014-04-27 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘) AND
a.PACKING_DATE <=
to_date(‘2014-04-28 08:30‘,
‘yyyy-mm-dd hh24:mi:ss‘)))
group by substr(rcard, 1, 12)) bz
on gxcl.wo_code = bz.wo_code
full join
(select wo_code, sum(ng_qty) 修复接收
from QTMR01
where MDATE >=
to_date(‘2014-04-27 08:30‘, ‘yyyy-mm-dd hh24:mi:ss‘)
AND MDATE <=
to_date(‘2014-04-28 08:30‘, ‘yyyy-mm-dd hh24:mi:ss‘)
and SUBSTR(TO_CHAR(MDATE + 30 / 1440, ‘YYYYMMDDHH24MISS‘), 9, 2) >= 9
AND SUBSTR(TO_CHAR(MDATE + 30 / 1440, ‘YYYYMMDDHH24MISS‘), 9, 2) < 21
group by wo_code) xiufujieshou
on xiufujieshou.wo_code = gxcl.wo_code) jieguo
inner join i_wo allwo
on allwo.wo_code = jieguo.wocode
inner join i_material M
on m.part_code = allwo.item_code
where 1 = 1
and allwo.workshop_code = ‘生产二区‘
group by rollup(item_code, allwo.workshop_code, wo_code)
该sql是 olap 的， 在oracle10g 上面跑。跑一次要33秒钟，一般olap报表，最好的客户体验要在5秒以内。
大家注意看，sql里面有full join，在oracle10g里面，full join默认会扫描2次，一次left join 一次right join 然后union all. 这样肯定慢了。在11g 只扫描1次。
10g 里面可以用 一个hint /*+ NATIVE_FULL_OUTER_JOIN */ ，让他们扫描1次
加了hint之后，SQL 3秒能出结果，她还问能否进一步优化，因为要讲课了，8点半讲课，没啥时间，明天帮忙看吧。
注意，这个hint别放在 第一个select 后面，这样是没用的。要放在 from (select /*+ NATIVE_FULL_OUTER_JOIN */ COALESCE(wocode,
也就是说要离full join 最近的一个 select 。至于为什么，请自己 google query block 关键字， hint一般只在 query block 生效。
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