最近在南寧出差，搞某個銀行的核心繫統跑批最佳化專案。
Oracle 19c Aix 生產環境跑完整體的批要40多分鐘左右，在Ob國產環境（國產系統+國產海光CPU）跑要3個小時😂。這個真不怪Ob，只能說海光處理器真是垃圾中的戰鬥機。
不過還好，測試環境硬體相對不給力的情況下，給哥最佳化到95分鐘跑完，還算不錯成績了，目標是整體跑批時間搞到80分鐘左右，就給領導交差。😁
今天在跑批序列的節點（前後有依賴關係的節點上）遇到條慢SQL，挺有意思的，分享下。
表資料量：
表名 | 分割槽規則 | 本地索引數量 | 全域性索引數量 | 主鍵PK數量 | 資料行數 ------------------------------------------------------------------------------------------------------------------------------------------------ ENS_CBANK.FFFFFF | 非分割槽表 | 0 | 1 | 1 | 72 ENS_CBANK.XXXXXXX | 非分割槽表 | 0 | 1 | 1 | 536 ENS_CBANK.CCCCCCCC | PARTITION BY HASH("INTERNAL_KEY") | 8 | 2 | 1 | 17289744 ------------------------------------------------------------------------------------------------------------------------------------------------
慢SQL：
SELECT /*+ parallel(16) */ DISTINCT A.PROD_TYPE, A.ACCT_NAME, A.ACCT_CCY, A.SEQ_NO, B.BRANCH, B.INTERNAL_CLIENT, B.COMPANY FROM ( SELECT DISTINCT PROD_TYPE, ACCT_NAME, ACCT_CCY, SEQ_NO, REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1, LEVEL) BRANCH_ROLE FROM FFFFFF CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT(BRANCH_ROLE, '[^|]+') AND PRIOR PROD_TYPE = PROD_TYPE AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL ORDER BY PROD_TYPE ) A, ( SELECT DISTINCT BRANCH, INTERNAL_CLIENT, COMPANY, REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1, LEVEL) BRANCH_ROLE FROM XXXXXXX WHERE AUTO_INNER_FLAG = 'Y' AND TRAN_BR_IND = 'Y' CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT(BRANCH_ROLE, '[^|]+') AND PRIOR BRANCH = BRANCH AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL ORDER BY BRANCH ) B WHERE A.BRANCH_ROLE = B.BRANCH_ROLE AND NOT EXISTS(SELECT 1 FROM CCCCCCCC C WHERE C.BASE_ACCT_NO = (B.BRANCH || A.PROD_TYPE || A.SEQ_NO)); 20 rows in set (10.027 sec)
慢SQL執行計劃：
+---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Query Plan | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | ==================================================================================================== | | |ID|OPERATOR |NAME |EST.ROWS|EST.TIME(us)| | | ---------------------------------------------------------------------------------------------------- | | |0 |HASH DISTINCT | |2500 |66969 | | | |1 |└─NESTED-LOOP ANTI JOIN | |2500 |65324 | | | |2 | ├─HASH JOIN | |2500 |13287 | | | |3 | │ ├─SUBPLAN SCAN |A |91 |1575 | | | |4 | │ │ └─HASH DISTINCT | |91 |1574 | | | |5 | │ │ └─SUBPLAN SCAN |VIEW1 |91 |1513 | | | |6 | │ │ └─NESTED-LOOP CONNECT BY | |91 |1513 | | | |7 | │ │ ├─SUBPLAN SCAN |VIEW2 |72 |9 | | | |8 | │ │ │ └─DISTRIBUTED TABLE FULL SCAN |FFFFFF |72 |9 | | | |9 | │ │ └─SUBPLAN SCAN |VIEW3 |1 |21 | | | |10| │ │ └─DISTRIBUTED TABLE RANGE SCAN|FFFFFF |1 |21 | | | |11| │ └─SUBPLAN SCAN |B |313 |11416 | | | |12| │ └─HASH DISTINCT | |313 |11415 | | | |13| │ └─SUBPLAN SCAN |VIEW4 |313 |11236 | | | |14| │ └─NESTED-LOOP CONNECT BY | |626 |11209 | | | |15| │ ├─SUBPLAN SCAN |VIEW5 |536 |33 | | | |16| │ │ └─DISTRIBUTED TABLE FULL SCAN |XXXXXXX |536 |32 | | | |17| │ └─SUBPLAN SCAN |VIEW6 |1 |21 | | | |18| │ └─DISTRIBUTED TABLE GET |XXXXXXX |1 |21 | | | |19| └─DISTRIBUTED TABLE RANGE SCAN |C(IDX_CCCCCCC_GLOBAL_INDEX2)|1 |21 | | | ==================================================================================================== | | Outputs & filters: | | ------------------------------------- | | 0 - output([A.PROD_TYPE(0x7f6cd80ac480)], [A.ACCT_NAME(0x7f6cd80b4ac0)], [A.ACCT_CCY(0x7f6cd80b8240)], [A.SEQ_NO(0x7f6cd80af970)], [B.BRANCH(0x7f6cd80a6020)], | | [B.INTERNAL_CLIENT(0x7f6cd80bc420)], [B.COMPANY(0x7f6cd80c2b10)]), filter(nil) | | distinct([A.PROD_TYPE(0x7f6cd80ac480)], [A.ACCT_NAME(0x7f6cd80b4ac0)], [A.ACCT_CCY(0x7f6cd80b8240)], [A.SEQ_NO(0x7f6cd80af970)], [B.BRANCH(0x7f6cd80a6020)], | | [B.INTERNAL_CLIENT(0x7f6cd80bc420)], [B.COMPANY(0x7f6cd80c2b10)]) | | 1 - output([A.PROD_TYPE(0x7f6cd80ac480)], [A.ACCT_NAME(0x7f6cd80b4ac0)], [A.ACCT_CCY(0x7f6cd80b8240)], [A.SEQ_NO(0x7f6cd80af970)], [B.BRANCH(0x7f6cd80a6020)], | | [B.INTERNAL_CLIENT(0x7f6cd80bc420)], [B.COMPANY(0x7f6cd80c2b10)]), filter(nil) | | conds(nil), nl_params_([B.BRANCH(0x7f6cd80a6020)(:8)], [A.PROD_TYPE(0x7f6cd80ac480)(:9)], [A.SEQ_NO(0x7f6cd80af970)(:10)]), use_batch=false | | 2 - output([A.PROD_TYPE(0x7f6cd80ac480)], [A.ACCT_NAME(0x7f6cd80b4ac0)], [A.ACCT_CCY(0x7f6cd80b8240)], [A.SEQ_NO(0x7f6cd80af970)], [B.BRANCH(0x7f6cd80a6020)], | | [B.INTERNAL_CLIENT(0x7f6cd80bc420)], [B.COMPANY(0x7f6cd80c2b10)]), filter(nil) | | equal_conds([A.BRANCH_ROLE(0x7f6cd808b490) = B.BRANCH_ROLE(0x7f6cd808b780)(0x7f6cd808ad40)]), other_conds(nil) | | 3 - output([A.BRANCH_ROLE(0x7f6cd808b490)], [A.PROD_TYPE(0x7f6cd80ac480)], [A.SEQ_NO(0x7f6cd80af970)], [A.ACCT_NAME(0x7f6cd80b4ac0)], [A.ACCT_CCY(0x7f6cd80b8240)]), filter(nil) | | access([A.BRANCH_ROLE(0x7f6cd808b490)], [A.PROD_TYPE(0x7f6cd80ac480)], [A.SEQ_NO(0x7f6cd80af970)], [A.ACCT_NAME(0x7f6cd80b4ac0)], [A.ACCT_CCY(0x7f6cd80b8240)]) | | 4 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f6cd80e1a10)], [VIEW1.FFFFFF.ACCT_NAME(0x7f6cd80e2590)], [VIEW1.FFFFFF.ACCT_CCY(0x7f6cd80e1cf0)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f6cd80e1fd0)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f6cd80e22b0), VARCHAR2(1048576 | | ))(0x7f6cd804f830), cast('[^|]+', VARCHAR2(1048576 ))(0x7f6cd8050380), 1, VIEW1.LEVEL(0x7f6cd80e2870))(0x7f6cd804e000)]), filter(nil) | | distinct([VIEW1.FFFFFF.PROD_TYPE(0x7f6cd80e1a10)], [VIEW1.FFFFFF.ACCT_NAME(0x7f6cd80e2590)], [VIEW1.FFFFFF.ACCT_CCY(0x7f6cd80e1cf0)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f6cd80e1fd0)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f6cd80e22b0), VARCHAR2(1048576 | | ))(0x7f6cd804f830), cast('[^|]+', VARCHAR2(1048576 ))(0x7f6cd8050380), 1, VIEW1.LEVEL(0x7f6cd80e2870))(0x7f6cd804e000)]) | | 5 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f6cd80e1a10)], [VIEW1.FFFFFF.ACCT_CCY(0x7f6cd80e1cf0)], [VIEW1.FFFFFF.SEQ_NO(0x7f6cd80e1fd0)], | | [VIEW1.FFFFFF.BRANCH_ROLE(0x7f6cd80e22b0)], [VIEW1.FFFFFF.ACCT_NAME(0x7f6cd80e2590)], [VIEW1.LEVEL(0x7f6cd80e2870)]), filter(nil) | | access([VIEW1.FFFFFF.PROD_TYPE(0x7f6cd80e1a10)], [VIEW1.FFFFFF.ACCT_CCY(0x7f6cd80e1cf0)], [VIEW1.FFFFFF.SEQ_NO(0x7f6cd80e1fd0)], | | [VIEW1.FFFFFF.BRANCH_ROLE(0x7f6cd80e22b0)], [VIEW1.FFFFFF.ACCT_NAME(0x7f6cd80e2590)], [VIEW1.LEVEL(0x7f6cd80e2870)]) | | 6 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f6cd810a810)], [VIEW3.FFFFFF.ACCT_CCY(0x7f6cd810aaf0)], [VIEW3.FFFFFF.SEQ_NO(0x7f6cd810add0)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f6cd810b0b0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f6cd810b390)], [LEVEL(0x7f6cd8042190)]), filter(nil) | | conds(nil), nl_params_([LEVEL(0x7f6cd8042190)(:0)], [VIEW2.FFFFFF.PROD_TYPE(0x7f6cd81096c0)(:1)], [(T_OP_PRIOR, oceanbase.DBMS_RANDOM.VALUE()(0x7f6cd804a480))(0x7f6cd8047a00)(:2 | | )]), use_batch=false | | 7 - output([VIEW2.FFFFFF.PROD_TYPE(0x7f6cd81096c0)], [VIEW2.FFFFFF.ACCT_CCY(0x7f6cd81099a0)], [VIEW2.FFFFFF.SEQ_NO(0x7f6cd8109c80)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f6cd8109f60)], [VIEW2.FFFFFF.ACCT_NAME(0x7f6cd810a240)]), filter(nil) | | access([VIEW2.FFFFFF.PROD_TYPE(0x7f6cd81096c0)], [VIEW2.FFFFFF.ACCT_CCY(0x7f6cd81099a0)], [VIEW2.FFFFFF.SEQ_NO(0x7f6cd8109c80)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f6cd8109f60)], [VIEW2.FFFFFF.ACCT_NAME(0x7f6cd810a240)]) | | 8 - output([FFFFFF.PROD_TYPE(0x7f6cd80471e0)], [FFFFFF.ACCT_CCY(0x7f6cd804d700)], [FFFFFF.SEQ_NO(0x7f6cd804dd00)], | | [FFFFFF.BRANCH_ROLE(0x7f6cd8043c50)], [FFFFFF.ACCT_NAME(0x7f6cd804d100)]), filter(nil) | | access([FFFFFF.PROD_TYPE(0x7f6cd80471e0)], [FFFFFF.ACCT_CCY(0x7f6cd804d700)], [FFFFFF.SEQ_NO(0x7f6cd804dd00)], | | [FFFFFF.BRANCH_ROLE(0x7f6cd8043c50)], [FFFFFF.ACCT_NAME(0x7f6cd804d100)]), partitions(p0) | | is_index_back=false, is_global_index=false, | | range_key([FFFFFF.PROD_TYPE(0x7f6cd80471e0)], [FFFFFF.ACCT_CCY(0x7f6cd804d700)], [FFFFFF.SEQ_NO(0x7f6cd804dd00)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true | | 9 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f6cd810a810)], [VIEW3.FFFFFF.ACCT_CCY(0x7f6cd810aaf0)], [VIEW3.FFFFFF.SEQ_NO(0x7f6cd810add0)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f6cd810b0b0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f6cd810b390)]), filter(nil), startup_filter([:2 | | IS NOT NULL(0x7f56b3552bb0)]) | | access([VIEW3.FFFFFF.PROD_TYPE(0x7f6cd810a810)], [VIEW3.FFFFFF.ACCT_CCY(0x7f6cd810aaf0)], [VIEW3.FFFFFF.SEQ_NO(0x7f6cd810add0)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f6cd810b0b0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f6cd810b390)]) | | 10 - output([FFFFFF.PROD_TYPE(0x7f6cd8108560)], [FFFFFF.ACCT_CCY(0x7f6cd8108840)], [FFFFFF.SEQ_NO(0x7f6cd8108b20)], | | [FFFFFF.BRANCH_ROLE(0x7f6cd8108e00)], [FFFFFF.ACCT_NAME(0x7f6cd81090e0)]), filter([:0 <= REGEXP_COUNT(cast(FFFFFF.BRANCH_ROLE(0x7f6cd8108e00), | | VARCHAR2(1048576 ))(0x7f56b3553480), cast('[^|]+', VARCHAR2(1048576 ))(0x7f6cd8044b50))(0x7f56b3553d20)(0x7f56b35545c0)]) | | access([FFFFFF.PROD_TYPE(0x7f6cd8108560)], [FFFFFF.ACCT_CCY(0x7f6cd8108840)], [FFFFFF.SEQ_NO(0x7f6cd8108b20)], | | [FFFFFF.BRANCH_ROLE(0x7f6cd8108e00)], [FFFFFF.ACCT_NAME(0x7f6cd81090e0)]), partitions(p0) | | is_index_back=false, is_global_index=false, filter_before_indexback[false], | | range_key([FFFFFF.PROD_TYPE(0x7f6cd8108560)], [FFFFFF.ACCT_CCY(0x7f6cd8108840)], [FFFFFF.SEQ_NO(0x7f6cd8108b20)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true, | | range_cond([:1 = FFFFFF.PROD_TYPE(0x7f6cd8108560)(0x7f56b3554e80)]) | | 11 - output([B.BRANCH_ROLE(0x7f6cd808b780)], [B.BRANCH(0x7f6cd80a6020)], [B.INTERNAL_CLIENT(0x7f6cd80bc420)], [B.COMPANY(0x7f6cd80c2b10)]), filter(nil) | | access([B.BRANCH_ROLE(0x7f6cd808b780)], [B.BRANCH(0x7f6cd80a6020)], [B.INTERNAL_CLIENT(0x7f6cd80bc420)], [B.COMPANY(0x7f6cd80c2b10)]) | | 12 - output([VIEW4.XXXXXXX.BRANCH(0x7f6cd8125e10)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8126990)], [VIEW4.XXXXXXX.COMPANY(0x7f6cd8126c70)], [REGEXP_SUBSTR(cast(VIEW4.XXXXXXX.BRANCH_ROLE(0x7f | | 6cd81260f0), VARCHAR2(1048576 ))(0x7f6cd8087290), cast('[^|]+', VARCHAR2(1048576 ))(0x7f6cd8087de0), 1, VIEW4.LEVEL(0x7f6cd8126f50))(0x7f6cd8085740)]), filter(nil) | | distinct([VIEW4.XXXXXXX.BRANCH(0x7f6cd8125e10)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8126990)], [VIEW4.XXXXXXX.COMPANY(0x7f6cd8126c70)], [REGEXP_SUBSTR(cast(VIEW4.XXXXXXX.BRANCH_ROLE(0x | | 7f6cd81260f0), VARCHAR2(1048576 ))(0x7f6cd8087290), cast('[^|]+', VARCHAR2(1048576 ))(0x7f6cd8087de0), 1, VIEW4.LEVEL(0x7f6cd8126f50))(0x7f6cd8085740)]) | | 13 - output([VIEW4.XXXXXXX.BRANCH(0x7f6cd8125e10)], [VIEW4.XXXXXXX.BRANCH_ROLE(0x7f6cd81260f0)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8126990)], | | [VIEW4.XXXXXXX.COMPANY(0x7f6cd8126c70)], [VIEW4.LEVEL(0x7f6cd8126f50)]), filter([VIEW4.XXXXXXX.TRAN_BR_IND(0x7f6cd81266b0) = cast('Y', VARCHAR2(1048576 | | ))(0x7f6cd8083cb0)(0x7f6cd807a290)], [VIEW4.XXXXXXX.AUTO_INNER_FLAG(0x7f6cd81263d0) = cast('Y', VARCHAR2(1048576 ))(0x7f6cd80791a0)(0x7f6cd806f780)]) | | access([VIEW4.XXXXXXX.BRANCH(0x7f6cd8125e10)], [VIEW4.XXXXXXX.BRANCH_ROLE(0x7f6cd81260f0)], [VIEW4.XXXXXXX.AUTO_INNER_FLAG(0x7f6cd81263d0)], | | [VIEW4.XXXXXXX.TRAN_BR_IND(0x7f6cd81266b0)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8126990)], [VIEW4.XXXXXXX.COMPANY(0x7f6cd8126c70)], [VIEW4.LEVEL(0x7f6cd8126f50)]) | | 14 - output([VIEW6.XXXXXXX.BRANCH(0x7f6cd8157b10)], [VIEW6.XXXXXXX.BRANCH_ROLE(0x7f6cd8157df0)], [VIEW6.XXXXXXX.AUTO_INNER_FLAG(0x7f6cd81580d0)], | | [VIEW6.XXXXXXX.TRAN_BR_IND(0x7f6cd81583b0)], [VIEW6.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8158690)], [VIEW6.XXXXXXX.COMPANY(0x7f6cd8158970)], [LEVEL(0x7f6cd8064af0)]), filter(nil) | | conds(nil), nl_params_([LEVEL(0x7f6cd8064af0)(:3)], [VIEW5.XXXXXXX.BRANCH(0x7f6cd81566e0)(:4)], [(T_OP_PRIOR, oceanbase.DBMS_RANDOM.VALUE()(0x7f6cd806cde0))(0x7f6cd806a360)(:5)]), | | use_batch=false | | 15 - output([VIEW5.XXXXXXX.BRANCH(0x7f6cd81566e0)], [VIEW5.XXXXXXX.BRANCH_ROLE(0x7f6cd81569c0)], [VIEW5.XXXXXXX.AUTO_INNER_FLAG(0x7f6cd8156ca0)], | | [VIEW5.XXXXXXX.TRAN_BR_IND(0x7f6cd8156f80)], [VIEW5.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8157260)], [VIEW5.XXXXXXX.COMPANY(0x7f6cd8157540)]), filter(nil) | | access([VIEW5.XXXXXXX.BRANCH(0x7f6cd81566e0)], [VIEW5.XXXXXXX.BRANCH_ROLE(0x7f6cd81569c0)], [VIEW5.XXXXXXX.AUTO_INNER_FLAG(0x7f6cd8156ca0)], | | [VIEW5.XXXXXXX.TRAN_BR_IND(0x7f6cd8156f80)], [VIEW5.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8157260)], [VIEW5.XXXXXXX.COMPANY(0x7f6cd8157540)]) | | 16 - output([XXXXXXX.BRANCH(0x7f6cd8069b40)], [XXXXXXX.BRANCH_ROLE(0x7f6cd80665b0)], [XXXXXXX.AUTO_INNER_FLAG(0x7f6cd806fed0)], [XXXXXXX.TRAN_BR_IND(0x7f6cd807a9e0)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f6cd8084e40)], [XXXXXXX.COMPANY(0x7f6cd8085440)]), filter(nil) | | access([XXXXXXX.BRANCH(0x7f6cd8069b40)], [XXXXXXX.BRANCH_ROLE(0x7f6cd80665b0)], [XXXXXXX.AUTO_INNER_FLAG(0x7f6cd806fed0)], [XXXXXXX.TRAN_BR_IND(0x7f6cd807a9e0)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f6cd8084e40)], [XXXXXXX.COMPANY(0x7f6cd8085440)]), partitions(p0) | | is_index_back=false, is_global_index=false, | | range_key([XXXXXXX.BRANCH(0x7f6cd8069b40)]), range(MIN ; MAX)always true | | 17 - output([VIEW6.XXXXXXX.BRANCH(0x7f6cd8157b10)], [VIEW6.XXXXXXX.BRANCH_ROLE(0x7f6cd8157df0)], [VIEW6.XXXXXXX.AUTO_INNER_FLAG(0x7f6cd81580d0)], | | [VIEW6.XXXXXXX.TRAN_BR_IND(0x7f6cd81583b0)], [VIEW6.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8158690)], [VIEW6.XXXXXXX.COMPANY(0x7f6cd8158970)]), filter(nil), startup_filter([:5 | | IS NOT NULL(0x7f556fed9aa0)]) | | access([VIEW6.XXXXXXX.BRANCH(0x7f6cd8157b10)], [VIEW6.XXXXXXX.BRANCH_ROLE(0x7f6cd8157df0)], [VIEW6.XXXXXXX.AUTO_INNER_FLAG(0x7f6cd81580d0)], | | [VIEW6.XXXXXXX.TRAN_BR_IND(0x7f6cd81583b0)], [VIEW6.XXXXXXX.INTERNAL_CLIENT(0x7f6cd8158690)], [VIEW6.XXXXXXX.COMPANY(0x7f6cd8158970)]) | | 18 - output([XXXXXXX.BRANCH(0x7f6cd814cee0)], [XXXXXXX.BRANCH_ROLE(0x7f6cd814d1c0)], [XXXXXXX.AUTO_INNER_FLAG(0x7f6cd814d4a0)], [XXXXXXX.TRAN_BR_IND(0x7f6cd8151960)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f6cd8155e20)], [XXXXXXX.COMPANY(0x7f6cd8156100)]), filter([:3 <= REGEXP_COUNT(cast(XXXXXXX.BRANCH_ROLE(0x7f6cd814d1c0), | | VARCHAR2(1048576 ))(0x7f556feda370), cast('[^|]+', VARCHAR2(1048576 ))(0x7f6cd80674b0))(0x7f556fedac10)(0x7f556fedb4b0)]) | | access([XXXXXXX.BRANCH(0x7f6cd814cee0)], [XXXXXXX.BRANCH_ROLE(0x7f6cd814d1c0)], [XXXXXXX.AUTO_INNER_FLAG(0x7f6cd814d4a0)], [XXXXXXX.TRAN_BR_IND(0x7f6cd8151960)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f6cd8155e20)], [XXXXXXX.COMPANY(0x7f6cd8156100)]), partitions(p0) | | is_index_back=false, is_global_index=false, filter_before_indexback[false], | | range_key([XXXXXXX.BRANCH(0x7f6cd814cee0)]), range(MIN ; MAX)always true, | | range_cond([:4 = XXXXXXX.BRANCH(0x7f6cd814cee0)(0x7f556fedbd70)]) | | 19 - output(nil), filter(nil) | | access(nil), partitions(p0) | | is_index_back=false, is_global_index=true, | | range_key([C.BASE_ACCT_NO(0x7f6cd80a5d30)], [C.INTERNAL_KEY(0x7f6cd80a3600)]), range(MIN ; MAX), | | range_cond([C.BASE_ACCT_NO(0x7f6cd80a5d30) = (T_OP_CNN, (T_OP_CNN, :8, :9)(0x7f556ff63dc0), :10)(0x7f556ff648d0)(0x7f556ff653e0)]) | | Used Hint: | | ------------------------------------- | | /*+ | | | | PARALLEL(16) | | */ | | Qb name trace: | | ------------------------------------- | | stmt_id:0, stmt_type:T_EXPLAIN | | stmt_id:1, SEL$1 > SEL$C1AAFB47 > SEL$D45D735D > SEL$FF87951C | | stmt_id:2, SEL$2 | | stmt_id:3, SEL$3 | | stmt_id:4, SEL$4 | | stmt_id:5, parent:SEL$2 > SEL$9B6BAA9A | | stmt_id:6, parent:SEL$2 > SEL$9B6BAA9B | | stmt_id:7, parent:SEL$9B6BAA9B > SEL$E382C6D8_1 | | stmt_id:8, parent:SEL$3 > SEL$B648BD05 | | stmt_id:9, parent:SEL$3 > SEL$B648BD06 | | stmt_id:10, parent:SEL$B648BD06 > SEL$8174842E_1 | | Outline Data: | | ------------------------------------- | | /*+ | | BEGIN_OUTLINE_DATA | | USE_HASH_DISTINCT(@"SEL$FF87951C") | | LEADING(@"SEL$FF87951C" (("A"@"SEL$1" "B"@"SEL$1") "ENS_CBANK"."C"@"SEL$4")) | | USE_NL(@"SEL$FF87951C" "ENS_CBANK"."C"@"SEL$4") | | USE_HASH(@"SEL$FF87951C" "B"@"SEL$1") | | USE_HASH_DISTINCT(@"SEL$2") | | LEADING(@"SEL$9B6BAA9A" ("VIEW2"@"SEL$9B6BAA9A" "VIEW3"@"SEL$9B6BAA9A")) | | USE_NL(@"SEL$9B6BAA9A" "VIEW3"@"SEL$9B6BAA9A") | | FULL(@"SEL$9B6BAA9B" "ENS_CBANK"."FFFFFF"@"SEL$2") | | USE_DAS(@"SEL$9B6BAA9B" "ENS_CBANK"."FFFFFF"@"SEL$2") | | FULL(@"SEL$E382C6D8_1" "ENS_CBANK"."FFFFFF"@"SEL$2") | | USE_DAS(@"SEL$E382C6D8_1" "ENS_CBANK"."FFFFFF"@"SEL$2") | | USE_HASH_DISTINCT(@"SEL$3") | | LEADING(@"SEL$B648BD05" ("VIEW5"@"SEL$B648BD05" "VIEW6"@"SEL$B648BD05")) | | USE_NL(@"SEL$B648BD05" "VIEW6"@"SEL$B648BD05") | | FULL(@"SEL$B648BD06" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | USE_DAS(@"SEL$B648BD06" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | FULL(@"SEL$8174842E_1" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | USE_DAS(@"SEL$8174842E_1" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | INDEX(@"SEL$FF87951C" "C"@"SEL$4" "IDX_CCCCCCC_GLOBAL_INDEX2") | | USE_DAS(@"SEL$FF87951C" "C"@"SEL$4") | | SIMPLIFY_ORDER_BY(@"SEL$1") | | UNNEST(@"SEL$4") | | MERGE(@"SEL$4" > "SEL$D45D735D") | | OPTIMIZER_FEATURES_ENABLE('4.2.1.0') | | END_OUTLINE_DATA | | */ | | Optimization Info: | | ------------------------------------- | | FFFFFF: | | table_rows:72 | | physical_range_rows:72 | | logical_range_rows:72 | | index_back_rows:0 | | output_rows:72 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | FFFFFF: | | table_rows:72 | | physical_range_rows:1 | | logical_range_rows:1 | | index_back_rows:0 | | output_rows:0 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | XXXXXXX: | | table_rows:536 | | physical_range_rows:536 | | logical_range_rows:536 | | index_back_rows:0 | | output_rows:536 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[XXXXXXX] | | stats version:1722575463271440 | | dynamic sampling level:0 | | XXXXXXX: | | table_rows:536 | | physical_range_rows:1 | | logical_range_rows:1 | | index_back_rows:0 | | output_rows:0 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[XXXXXXX] | | stats version:1722575463271440 | | dynamic sampling level:0 | | C: | | table_rows:17289678 | | physical_range_rows:2 | | logical_range_rows:2 | | index_back_rows:0 | | output_rows:2 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[IDX_CCCCCCC_GLOBAL_INDEX2, IDX_CCCCCCCC_GLOBAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX1, IDX_CCCCCCCC_LOCAL_INDEX2, IDX_CCCCCCCC_LOCAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX4, IDX_CCCCCCCC_LOCAL_INDEX5, IDX_CCCCCCCC_LOCAL_INDEX6, IDX_CCCCCCCC_LOCAL_INDEX7, CCCCCCCC] | | pruned_index_name:[IDX_CCCCCCCC_GLOBAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX1, IDX_CCCCCCCC_LOCAL_INDEX2, IDX_CCCCCCCC_LOCAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX4, IDX_CCCCCCCC_LOCAL_INDEX5, IDX_CCCCCCCC_LOCAL_INDEX6, IDX_CCCCCCCC_LOCAL_INDEX7, CCCCCCCC] | | stats version:1728378528448689 | | dynamic sampling level:0 | | Plan Type: | | LOCAL | | Note: | | Degree of Parallelisim is 1 because stmt contain pl_udf which force das scan | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 231 rows in set (0.028 sec)
主要慢的SQL和計劃：
-- 慢的SQL： SELECT DISTINCT PROD_TYPE, ACCT_NAME, ACCT_CCY, SEQ_NO, REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1 , LEVEL) BRANCH_ROLE FROM FFFFFF CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') AND PRIOR PROD_TYPE = PROD_TYPE AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL ORDER BY PROD_TYPE 323 rows in set (10.204 sec) +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Query Plan | +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | ========================================================================================== | | |ID|OPERATOR |NAME |EST.ROWS|EST.TIME(us)| | | ------------------------------------------------------------------------------------------ | | |0 |MERGE DISTINCT | |91 |1580 | | | |1 |└─SORT | |91 |1579 | | | |2 | └─SUBPLAN SCAN |VIEW1 |91 |1513 | | | |3 | └─NESTED-LOOP CONNECT BY | |91 |1513 | | | |4 | ├─SUBPLAN SCAN |VIEW2 |72 |9 | | | |5 | │ └─DISTRIBUTED TABLE FULL SCAN |FFFFFF |72 |9 | | | |6 | └─SUBPLAN SCAN |VIEW3 |1 |21 | | | |7 | └─DISTRIBUTED TABLE RANGE SCAN|FFFFFF |1 |21 | | | ========================================================================================== | | Outputs & filters: | | ------------------------------------- | | 0 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f7f40648d50)], [VIEW1.FFFFFF.ACCT_NAME(0x7f7f406498d0)], [VIEW1.FFFFFF.ACCT_CCY(0x7f7f40649030)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f7f40649310)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f7f406495f0), VARCHAR2(1048576 | | ))(0x7f7f40631730), cast('[^|]+', VARCHAR2(1048576 ))(0x7f7f40632280), 1, VIEW1.LEVEL(0x7f7f40649bb0))(0x7f7f4062ff00)]), filter(nil) | | distinct([VIEW1.FFFFFF.PROD_TYPE(0x7f7f40648d50)], [VIEW1.FFFFFF.ACCT_NAME(0x7f7f406498d0)], [VIEW1.FFFFFF.ACCT_CCY(0x7f7f40649030)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f7f40649310)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f7f406495f0), VARCHAR2(1048576 | | ))(0x7f7f40631730), cast('[^|]+', VARCHAR2(1048576 ))(0x7f7f40632280), 1, VIEW1.LEVEL(0x7f7f40649bb0))(0x7f7f4062ff00)]) | | 1 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f7f40648d50)], [VIEW1.FFFFFF.ACCT_NAME(0x7f7f406498d0)], [VIEW1.FFFFFF.ACCT_CCY(0x7f7f40649030)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f7f40649310)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f7f406495f0), VARCHAR2(1048576 | | ))(0x7f7f40631730), cast('[^|]+', VARCHAR2(1048576 ))(0x7f7f40632280), 1, VIEW1.LEVEL(0x7f7f40649bb0))(0x7f7f4062ff00)]), filter(nil) | | sort_keys([VIEW1.FFFFFF.PROD_TYPE(0x7f7f40648d50), ASC], [VIEW1.FFFFFF.ACCT_NAME(0x7f7f406498d0), ASC], [VIEW1.FFFFFF.ACCT_CCY(0x7f7f40649030 | | ), ASC], [VIEW1.FFFFFF.SEQ_NO(0x7f7f40649310), ASC], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f7f406495f0), VARCHAR2(1048576 | | ))(0x7f7f40631730), cast('[^|]+', VARCHAR2(1048576 ))(0x7f7f40632280), 1, VIEW1.LEVEL(0x7f7f40649bb0))(0x7f7f4062ff00), ASC]) | | 2 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f7f40648d50)], [VIEW1.FFFFFF.ACCT_CCY(0x7f7f40649030)], [VIEW1.FFFFFF.SEQ_NO(0x7f7f40649310)], | | [VIEW1.FFFFFF.ACCT_NAME(0x7f7f406498d0)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f7f406495f0), VARCHAR2(1048576 | | ))(0x7f7f40631730), cast('[^|]+', VARCHAR2(1048576 ))(0x7f7f40632280), 1, VIEW1.LEVEL(0x7f7f40649bb0))(0x7f7f4062ff00)]), filter(nil) | | access([VIEW1.FFFFFF.PROD_TYPE(0x7f7f40648d50)], [VIEW1.FFFFFF.ACCT_CCY(0x7f7f40649030)], [VIEW1.FFFFFF.SEQ_NO(0x7f7f40649310)], | | [VIEW1.FFFFFF.BRANCH_ROLE(0x7f7f406495f0)], [VIEW1.FFFFFF.ACCT_NAME(0x7f7f406498d0)], [VIEW1.LEVEL(0x7f7f40649bb0)]) | | 3 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f7f40671b50)], [VIEW3.FFFFFF.ACCT_CCY(0x7f7f40671e30)], [VIEW3.FFFFFF.SEQ_NO(0x7f7f40672110)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f7f406723f0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f7f406726d0)], [LEVEL(0x7f7f40624090)]), filter(nil) | | conds(nil), nl_params_([LEVEL(0x7f7f40624090)(:0)], [VIEW2.FFFFFF.PROD_TYPE(0x7f7f40670a00)(:1)], [(T_OP_PRIOR, oceanbase.DBMS_RANDOM.VALUE()(0x7f7f4062c380))(0x7f7f40629900)(:2 | | )]), use_batch=false | | 4 - output([VIEW2.FFFFFF.PROD_TYPE(0x7f7f40670a00)], [VIEW2.FFFFFF.ACCT_CCY(0x7f7f40670ce0)], [VIEW2.FFFFFF.SEQ_NO(0x7f7f40670fc0)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f7f406712a0)], [VIEW2.FFFFFF.ACCT_NAME(0x7f7f40671580)]), filter(nil) | | access([VIEW2.FFFFFF.PROD_TYPE(0x7f7f40670a00)], [VIEW2.FFFFFF.ACCT_CCY(0x7f7f40670ce0)], [VIEW2.FFFFFF.SEQ_NO(0x7f7f40670fc0)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f7f406712a0)], [VIEW2.FFFFFF.ACCT_NAME(0x7f7f40671580)]) | | 5 - output([FFFFFF.PROD_TYPE(0x7f7f406290e0)], [FFFFFF.ACCT_CCY(0x7f7f4062f600)], [FFFFFF.SEQ_NO(0x7f7f4062fc00)], | | [FFFFFF.BRANCH_ROLE(0x7f7f40625b50)], [FFFFFF.ACCT_NAME(0x7f7f4062f000)]), filter(nil) | | access([FFFFFF.PROD_TYPE(0x7f7f406290e0)], [FFFFFF.ACCT_CCY(0x7f7f4062f600)], [FFFFFF.SEQ_NO(0x7f7f4062fc00)], | | [FFFFFF.BRANCH_ROLE(0x7f7f40625b50)], [FFFFFF.ACCT_NAME(0x7f7f4062f000)]), partitions(p0) | | is_index_back=false, is_global_index=false, | | range_key([FFFFFF.PROD_TYPE(0x7f7f406290e0)], [FFFFFF.ACCT_CCY(0x7f7f4062f600)], [FFFFFF.SEQ_NO(0x7f7f4062fc00)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true | | 6 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f7f40671b50)], [VIEW3.FFFFFF.ACCT_CCY(0x7f7f40671e30)], [VIEW3.FFFFFF.SEQ_NO(0x7f7f40672110)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f7f406723f0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f7f406726d0)]), filter(nil), startup_filter([:2 | | IS NOT NULL(0x7f7f407b6c70)]) | | access([VIEW3.FFFFFF.PROD_TYPE(0x7f7f40671b50)], [VIEW3.FFFFFF.ACCT_CCY(0x7f7f40671e30)], [VIEW3.FFFFFF.SEQ_NO(0x7f7f40672110)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f7f406723f0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f7f406726d0)]) | | 7 - output([FFFFFF.PROD_TYPE(0x7f7f4066f8a0)], [FFFFFF.ACCT_CCY(0x7f7f4066fb80)], [FFFFFF.SEQ_NO(0x7f7f4066fe60)], | | [FFFFFF.BRANCH_ROLE(0x7f7f40670140)], [FFFFFF.ACCT_NAME(0x7f7f40670420)]), filter([:0 <= REGEXP_COUNT(cast(FFFFFF.BRANCH_ROLE(0x7f7f40670140), | | VARCHAR2(1048576 ))(0x7f7f407b7540), cast('[^|]+', VARCHAR2(1048576 ))(0x7f7f40626a50))(0x7f7f407b7de0)(0x7f7f407b8680)]) | | access([FFFFFF.PROD_TYPE(0x7f7f4066f8a0)], [FFFFFF.ACCT_CCY(0x7f7f4066fb80)], [FFFFFF.SEQ_NO(0x7f7f4066fe60)], | | [FFFFFF.BRANCH_ROLE(0x7f7f40670140)], [FFFFFF.ACCT_NAME(0x7f7f40670420)]), partitions(p0) | | is_index_back=false, is_global_index=false, filter_before_indexback[false], | | range_key([FFFFFF.PROD_TYPE(0x7f7f4066f8a0)], [FFFFFF.ACCT_CCY(0x7f7f4066fb80)], [FFFFFF.SEQ_NO(0x7f7f4066fe60)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true, | | range_cond([:1 = FFFFFF.PROD_TYPE(0x7f7f4066f8a0)(0x7f7f407b8f40)]) | | Used Hint: | | ------------------------------------- | | /*+ | | | | */ | | Qb name trace: | | ------------------------------------- | | stmt_id:0, stmt_type:T_EXPLAIN | | stmt_id:1, SEL$1 | | stmt_id:2, parent:SEL$1 > SEL$C07C92B2 | | stmt_id:3, parent:SEL$1 > SEL$C07C92B3 | | stmt_id:4, parent:SEL$C07C92B3 > SEL$4DA317D2_1 | | Outline Data: | | ------------------------------------- | | /*+ | | BEGIN_OUTLINE_DATA | | LEADING(@"SEL$C07C92B2" ("VIEW2"@"SEL$C07C92B2" "VIEW3"@"SEL$C07C92B2")) | | USE_NL(@"SEL$C07C92B2" "VIEW3"@"SEL$C07C92B2") | | FULL(@"SEL$C07C92B3" "ENS_CBANK"."FFFFFF"@"SEL$1") | | USE_DAS(@"SEL$C07C92B3" "ENS_CBANK"."FFFFFF"@"SEL$1") | | FULL(@"SEL$4DA317D2_1" "ENS_CBANK"."FFFFFF"@"SEL$1") | | USE_DAS(@"SEL$4DA317D2_1" "ENS_CBANK"."FFFFFF"@"SEL$1") | | OPTIMIZER_FEATURES_ENABLE('4.2.1.0') | | END_OUTLINE_DATA | | */ | | Optimization Info: | | ------------------------------------- | | FFFFFF: | | table_rows:72 | | physical_range_rows:72 | | logical_range_rows:72 | | index_back_rows:0 | | output_rows:72 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | FFFFFF: | | table_rows:72 | | physical_range_rows:1 | | logical_range_rows:1 | | index_back_rows:0 | | output_rows:0 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | Plan Type: | | LOCAL | | Note: | | Degree of Parallelisim is 1 because stmt contain pl_udf which force das scan | +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 113 rows in set (0.012 sec)
這條SQL執行時間跑10秒，慢在 PRIOR DBMS_RANDOM.VALUE IS NOT NULL ORDER BY PROD_TYPE 這段，如果去掉就非常快，毫秒級別出結果。
但是去掉以後返回的結果集數量和沒去掉之前差別很大，BRANCH_ROLE 欄位儲存的內容是 'Role1|Role2|Role3|Role4|Role5' 這種資料格式，行的資料存放到一個列裡面。
因為這條SQL沒寫 START WITH 條件, 我猜開發想實現的邏輯是將父節點和子節點關聯成功的前提下，將每行的 BRANCH_ROLE 欄位內 'Role1|Role2|Role3|Role4|Role5' 資料拆分成每一行（REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1 , LEVEL) BRANCH_ROLE），才寫了個 PRIOR DBMS_RANDOM.VALUE IS NOT NULL 條件，將不確定性帶入遞迴條件中。
只要達到 CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') 這個計數器條件以後，就停止遞迴。
例如： PROD_TYPE BRANCH_ROLE 1 Role1|Role2|Role3|Role4|Role5 拆成： PROD_TYPE BRANCH_ROLE 1 Role1 1 Role2 1 Role3 1 Role4 1 Role5
假如 PROD_TYPE 有 10行，每行列拆行的情況下，資料會翻倍。
不過開發這個邏輯沒寫全，我按照他這個邏輯改寫一版。
改寫SQL（PROD_TYPE 、ACCT_CCY 、SEQ_NO聯合主鍵）：
-- 改寫： SELECT DISTINCT PROD_TYPE, ACCT_NAME, ACCT_CCY, SEQ_NO, REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1 , LEVEL) BRANCH_ROLE FROM FFFFFF CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') AND PRIOR PROD_TYPE = PROD_TYPE AND PRIOR ACCT_CCY = ACCT_CCY AND PRIOR SEQ_NO = SEQ_NO AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL 323 rows in set (0.058 sec) +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Query Plan | +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | ======================================================================================= | | |ID|OPERATOR |NAME |EST.ROWS|EST.TIME(us)| | | --------------------------------------------------------------------------------------- | | |0 |HASH DISTINCT | |85 |1567 | | | |1 |└─SUBPLAN SCAN |VIEW1 |85 |1511 | | | |2 | └─NESTED-LOOP CONNECT BY | |85 |1510 | | | |3 | ├─SUBPLAN SCAN |VIEW2 |72 |9 | | | |4 | │ └─DISTRIBUTED TABLE FULL SCAN|FFFFFF |72 |9 | | | |5 | └─SUBPLAN SCAN |VIEW3 |1 |21 | | | |6 | └─DISTRIBUTED TABLE GET |FFFFFF |1 |21 | | | ======================================================================================= | | Outputs & filters: | | ------------------------------------- | | 0 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0c4cd10)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0c4d890)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0c4cff0)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f59f0c4d2d0)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0c4d5b0), VARCHAR2(1048576 | | ))(0x7f59f0c351b0), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c35d00), 1, VIEW1.LEVEL(0x7f59f0c4db70))(0x7f59f0c33c90)]), filter(nil) | | distinct([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0c4cd10)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0c4d890)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0c4cff0)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f59f0c4d2d0)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0c4d5b0), VARCHAR2(1048576 | | ))(0x7f59f0c351b0), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c35d00), 1, VIEW1.LEVEL(0x7f59f0c4db70))(0x7f59f0c33c90)]) | | 1 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0c4cd10)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0c4cff0)], [VIEW1.FFFFFF.SEQ_NO(0x7f59f0c4d2d0)], | | [VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0c4d5b0)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0c4d890)], [VIEW1.LEVEL(0x7f59f0c4db70)]), filter(nil) | | access([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0c4cd10)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0c4cff0)], [VIEW1.FFFFFF.SEQ_NO(0x7f59f0c4d2d0)], | | [VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0c4d5b0)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0c4d890)], [VIEW1.LEVEL(0x7f59f0c4db70)]) | | 2 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f59f0c75d50)], [VIEW3.FFFFFF.ACCT_CCY(0x7f59f0c76030)], [VIEW3.FFFFFF.SEQ_NO(0x7f59f0c76310)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f59f0c765f0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f59f0c768d0)], [LEVEL(0x7f59f0c24ac0)]), filter(nil) | | conds(nil), nl_params_([LEVEL(0x7f59f0c24ac0)(:0)], [VIEW2.FFFFFF.PROD_TYPE(0x7f59f0c74c00)(:1)], [VIEW2.FFFFFF.ACCT_CCY(0x7f59f0c74ee0)(:2)], | | [VIEW2.FFFFFF.SEQ_NO(0x7f59f0c751c0)(:3)], [(T_OP_PRIOR, oceanbase.DBMS_RANDOM.VALUE()(0x7f59f0c306d0))(0x7f59f0c2dc50)(:4)]), use_batch=false | | 3 - output([VIEW2.FFFFFF.PROD_TYPE(0x7f59f0c74c00)], [VIEW2.FFFFFF.ACCT_CCY(0x7f59f0c74ee0)], [VIEW2.FFFFFF.SEQ_NO(0x7f59f0c751c0)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f59f0c754a0)], [VIEW2.FFFFFF.ACCT_NAME(0x7f59f0c75780)]), filter(nil) | | access([VIEW2.FFFFFF.PROD_TYPE(0x7f59f0c74c00)], [VIEW2.FFFFFF.ACCT_CCY(0x7f59f0c74ee0)], [VIEW2.FFFFFF.SEQ_NO(0x7f59f0c751c0)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f59f0c754a0)], [VIEW2.FFFFFF.ACCT_NAME(0x7f59f0c75780)]) | | 4 - output([FFFFFF.PROD_TYPE(0x7f59f0c29b10)], [FFFFFF.ACCT_CCY(0x7f59f0c2b7a0)], [FFFFFF.SEQ_NO(0x7f59f0c2d430)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0c26580)], [FFFFFF.ACCT_NAME(0x7f59f0c33350)]), filter(nil) | | access([FFFFFF.PROD_TYPE(0x7f59f0c29b10)], [FFFFFF.ACCT_CCY(0x7f59f0c2b7a0)], [FFFFFF.SEQ_NO(0x7f59f0c2d430)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0c26580)], [FFFFFF.ACCT_NAME(0x7f59f0c33350)]), partitions(p0) | | is_index_back=false, is_global_index=false, | | range_key([FFFFFF.PROD_TYPE(0x7f59f0c29b10)], [FFFFFF.ACCT_CCY(0x7f59f0c2b7a0)], [FFFFFF.SEQ_NO(0x7f59f0c2d430)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true | | 5 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f59f0c75d50)], [VIEW3.FFFFFF.ACCT_CCY(0x7f59f0c76030)], [VIEW3.FFFFFF.SEQ_NO(0x7f59f0c76310)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f59f0c765f0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f59f0c768d0)]), filter(nil), startup_filter([:4 | | IS NOT NULL(0x7f59f0dc46b0)]) | | access([VIEW3.FFFFFF.PROD_TYPE(0x7f59f0c75d50)], [VIEW3.FFFFFF.ACCT_CCY(0x7f59f0c76030)], [VIEW3.FFFFFF.SEQ_NO(0x7f59f0c76310)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f59f0c765f0)], [VIEW3.FFFFFF.ACCT_NAME(0x7f59f0c768d0)]) | | 6 - output([FFFFFF.PROD_TYPE(0x7f59f0c73aa0)], [FFFFFF.ACCT_CCY(0x7f59f0c73d80)], [FFFFFF.SEQ_NO(0x7f59f0c74060)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0c74340)], [FFFFFF.ACCT_NAME(0x7f59f0c74620)]), filter([:0 <= REGEXP_COUNT(cast(FFFFFF.BRANCH_ROLE(0x7f59f0c74340), | | VARCHAR2(1048576 ))(0x7f59f0dc4f80), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c27480))(0x7f59f0dc5820)(0x7f59f0dc60c0)]) | | access([FFFFFF.PROD_TYPE(0x7f59f0c73aa0)], [FFFFFF.ACCT_CCY(0x7f59f0c73d80)], [FFFFFF.SEQ_NO(0x7f59f0c74060)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0c74340)], [FFFFFF.ACCT_NAME(0x7f59f0c74620)]), partitions(p0) | | is_index_back=false, is_global_index=false, filter_before_indexback[false], | | range_key([FFFFFF.PROD_TYPE(0x7f59f0c73aa0)], [FFFFFF.ACCT_CCY(0x7f59f0c73d80)], [FFFFFF.SEQ_NO(0x7f59f0c74060)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true, | | range_cond([:1 = FFFFFF.PROD_TYPE(0x7f59f0c73aa0)(0x7f59f0dc6980)], [:2 = FFFFFF.ACCT_CCY(0x7f59f0c73d80)(0x7f59f0dc7210)], | | [:3 = FFFFFF.SEQ_NO(0x7f59f0c74060)(0x7f59f0dc7aa0)]) | | Used Hint: | | ------------------------------------- | | /*+ | | | | */ | | Qb name trace: | | ------------------------------------- | | stmt_id:0, stmt_type:T_EXPLAIN | | stmt_id:1, SEL$1 | | stmt_id:2, parent:SEL$1 > SEL$C07C92B2 | | stmt_id:3, parent:SEL$1 > SEL$C07C92B3 | | stmt_id:4, parent:SEL$C07C92B3 > SEL$4DA317D2_1 | | Outline Data: | | ------------------------------------- | | /*+ | | BEGIN_OUTLINE_DATA | | USE_HASH_DISTINCT(@"SEL$1") | | LEADING(@"SEL$C07C92B2" ("VIEW2"@"SEL$C07C92B2" "VIEW3"@"SEL$C07C92B2")) | | USE_NL(@"SEL$C07C92B2" "VIEW3"@"SEL$C07C92B2") | | FULL(@"SEL$C07C92B3" "ENS_CBANK"."FFFFFF"@"SEL$1") | | USE_DAS(@"SEL$C07C92B3" "ENS_CBANK"."FFFFFF"@"SEL$1") | | FULL(@"SEL$4DA317D2_1" "ENS_CBANK"."FFFFFF"@"SEL$1") | | USE_DAS(@"SEL$4DA317D2_1" "ENS_CBANK"."FFFFFF"@"SEL$1") | | OPTIMIZER_FEATURES_ENABLE('4.2.1.0') | | END_OUTLINE_DATA | | */ | | Optimization Info: | | ------------------------------------- | | FFFFFF: | | table_rows:72 | | physical_range_rows:72 | | logical_range_rows:72 | | index_back_rows:0 | | output_rows:72 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | FFFFFF: | | table_rows:72 | | physical_range_rows:1 | | logical_range_rows:1 | | index_back_rows:0 | | output_rows:0 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | Plan Type: | | LOCAL | | Note: | | Degree of Parallelisim is 1 because stmt contain pl_udf which force das scan | +-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 107 rows in set (0.016 sec)
簡單點說就是每一行資料展開 BRANCH_ROLE 列內的資料。改寫的SQL看得懂就看，看不懂也不多說，說起來又一大堆😁。
改成這樣後SQL執行時間降到 58毫秒，最佳化也算是結束了， XXXXXXX 那段遞迴不慢不需要最佳化，因為 BRANCH 是唯一鍵。
整體SQL速度和執行計劃：
SELECT DISTINCT A.PROD_TYPE, A.ACCT_NAME, A.ACCT_CCY, A.SEQ_NO, B.BRANCH, B.INTERNAL_CLIENT, B.COMPANY FROM ( SELECT DISTINCT PROD_TYPE, ACCT_NAME, ACCT_CCY, SEQ_NO, REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1 , LEVEL) BRANCH_ROLE FROM FFFFFF CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') AND PRIOR PROD_TYPE = PROD_TYPE AND PRIOR ACCT_CCY = ACCT_CCY AND PRIOR SEQ_NO = SEQ_NO AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL ) A , ( SELECT DISTINCT BRANCH, INTERNAL_CLIENT, COMPANY, REGEXP_SUBSTR (BRANCH_ROLE, '[^|]+', 1, LEVEL ) BRANCH_ROLE FROM XXXXXXX WHERE AUTO_INNER_FLAG = 'Y' AND TRAN_BR_IND = 'Y' CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') AND PRIOR BRANCH = BRANCH AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL ) B WHERE A.BRANCH_ROLE = B.BRANCH_ROLE AND NOT EXISTS ( SELECT 1 FROM CCCCCCCC C WHERE C.BASE_ACCT_NO = ( B.BRANCH || A.PROD_TYPE || A.SEQ_NO )) 20 rows in set (0.556 sec) +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | Query Plan | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ | =================================================================================================== | | |ID|OPERATOR |NAME |EST.ROWS|EST.TIME(us)| | | --------------------------------------------------------------------------------------------------- | | |0 |HASH DISTINCT | |2323 |63136 | | | |1 |└─NESTED-LOOP ANTI JOIN | |2323 |61608 | | | |2 | ├─HASH JOIN | |2323 |13264 | | | |3 | │ ├─SUBPLAN SCAN |A |85 |1568 | | | |4 | │ │ └─HASH DISTINCT | |85 |1567 | | | |5 | │ │ └─SUBPLAN SCAN |VIEW1 |85 |1511 | | | |6 | │ │ └─NESTED-LOOP CONNECT BY | |85 |1510 | | | |7 | │ │ ├─SUBPLAN SCAN |VIEW2 |72 |9 | | | |8 | │ │ │ └─DISTRIBUTED TABLE FULL SCAN|FFFFFF |72 |9 | | | |9 | │ │ └─SUBPLAN SCAN |VIEW3 |1 |21 | | | |10| │ │ └─DISTRIBUTED TABLE GET |FFFFFF |1 |21 | | | |11| │ └─SUBPLAN SCAN |B |313 |11416 | | | |12| │ └─HASH DISTINCT | |313 |11415 | | | |13| │ └─SUBPLAN SCAN |VIEW4 |313 |11236 | | | |14| │ └─NESTED-LOOP CONNECT BY | |626 |11209 | | | |15| │ ├─SUBPLAN SCAN |VIEW5 |536 |33 | | | |16| │ │ └─DISTRIBUTED TABLE FULL SCAN|XXXXXXX |536 |32 | | | |17| │ └─SUBPLAN SCAN |VIEW6 |1 |21 | | | |18| │ └─DISTRIBUTED TABLE GET |XXXXXXX |1 |21 | | | |19| └─DISTRIBUTED TABLE RANGE SCAN |C(IDX_CCCCCCC_GLOBAL_INDEX2)|1 |21 | | | =================================================================================================== | | Outputs & filters: | | ------------------------------------- | | 0 - output([A.PROD_TYPE(0x7f59f0caf5e0)], [A.ACCT_NAME(0x7f59f0cb7c20)], [A.ACCT_CCY(0x7f59f0cbb3a0)], [A.SEQ_NO(0x7f59f0cb2ad0)], [B.BRANCH(0x7f59f0ca9180)], | | [B.INTERNAL_CLIENT(0x7f59f0cbf580)], [B.COMPANY(0x7f59f0cc5c70)]), filter(nil) | | distinct([A.PROD_TYPE(0x7f59f0caf5e0)], [A.ACCT_NAME(0x7f59f0cb7c20)], [A.ACCT_CCY(0x7f59f0cbb3a0)], [A.SEQ_NO(0x7f59f0cb2ad0)], [B.BRANCH(0x7f59f0ca9180)], | | [B.INTERNAL_CLIENT(0x7f59f0cbf580)], [B.COMPANY(0x7f59f0cc5c70)]) | | 1 - output([A.PROD_TYPE(0x7f59f0caf5e0)], [A.ACCT_NAME(0x7f59f0cb7c20)], [A.ACCT_CCY(0x7f59f0cbb3a0)], [A.SEQ_NO(0x7f59f0cb2ad0)], [B.BRANCH(0x7f59f0ca9180)], | | [B.INTERNAL_CLIENT(0x7f59f0cbf580)], [B.COMPANY(0x7f59f0cc5c70)]), filter(nil) | | conds(nil), nl_params_([B.BRANCH(0x7f59f0ca9180)(:10)], [A.PROD_TYPE(0x7f59f0caf5e0)(:11)], [A.SEQ_NO(0x7f59f0cb2ad0)(:12)]), use_batch=false | | 2 - output([A.PROD_TYPE(0x7f59f0caf5e0)], [A.ACCT_NAME(0x7f59f0cb7c20)], [A.ACCT_CCY(0x7f59f0cbb3a0)], [A.SEQ_NO(0x7f59f0cb2ad0)], [B.BRANCH(0x7f59f0ca9180)], | | [B.INTERNAL_CLIENT(0x7f59f0cbf580)], [B.COMPANY(0x7f59f0cc5c70)]), filter(nil) | | equal_conds([A.BRANCH_ROLE(0x7f59f0c8e5f0) = B.BRANCH_ROLE(0x7f59f0c8e8e0)(0x7f59f0c8dea0)]), other_conds(nil) | | 3 - output([A.BRANCH_ROLE(0x7f59f0c8e5f0)], [A.PROD_TYPE(0x7f59f0caf5e0)], [A.SEQ_NO(0x7f59f0cb2ad0)], [A.ACCT_NAME(0x7f59f0cb7c20)], [A.ACCT_CCY(0x7f59f0cbb3a0)]), filter(nil) | | access([A.BRANCH_ROLE(0x7f59f0c8e5f0)], [A.PROD_TYPE(0x7f59f0caf5e0)], [A.SEQ_NO(0x7f59f0cb2ad0)], [A.ACCT_NAME(0x7f59f0cb7c20)], [A.ACCT_CCY(0x7f59f0cbb3a0)]) | | 4 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0ce50b0)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0ce5c30)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0ce5390)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f59f0ce5670)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0ce5950), VARCHAR2(1048576 | | ))(0x7f59f0c52a60), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c535b0), 1, VIEW1.LEVEL(0x7f59f0ce5f10))(0x7f59f0c51540)]), filter(nil) | | distinct([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0ce50b0)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0ce5c30)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0ce5390)], | | [VIEW1.FFFFFF.SEQ_NO(0x7f59f0ce5670)], [REGEXP_SUBSTR(cast(VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0ce5950), VARCHAR2(1048576 | | ))(0x7f59f0c52a60), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c535b0), 1, VIEW1.LEVEL(0x7f59f0ce5f10))(0x7f59f0c51540)]) | | 5 - output([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0ce50b0)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0ce5390)], [VIEW1.FFFFFF.SEQ_NO(0x7f59f0ce5670)], | | [VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0ce5950)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0ce5c30)], [VIEW1.LEVEL(0x7f59f0ce5f10)]), filter(nil) | | access([VIEW1.FFFFFF.PROD_TYPE(0x7f59f0ce50b0)], [VIEW1.FFFFFF.ACCT_CCY(0x7f59f0ce5390)], [VIEW1.FFFFFF.SEQ_NO(0x7f59f0ce5670)], | | [VIEW1.FFFFFF.BRANCH_ROLE(0x7f59f0ce5950)], [VIEW1.FFFFFF.ACCT_NAME(0x7f59f0ce5c30)], [VIEW1.LEVEL(0x7f59f0ce5f10)]) | | 6 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f59f0d0e0f0)], [VIEW3.FFFFFF.ACCT_CCY(0x7f59f0d0e3d0)], [VIEW3.FFFFFF.SEQ_NO(0x7f59f0d0e6b0)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f59f0d0e990)], [VIEW3.FFFFFF.ACCT_NAME(0x7f59f0d0ec70)], [LEVEL(0x7f59f0c42370)]), filter(nil) | | conds(nil), nl_params_([LEVEL(0x7f59f0c42370)(:0)], [VIEW2.FFFFFF.PROD_TYPE(0x7f59f0d0cfa0)(:1)], [VIEW2.FFFFFF.ACCT_CCY(0x7f59f0d0d280)(:2)], | | [VIEW2.FFFFFF.SEQ_NO(0x7f59f0d0d560)(:3)], [(T_OP_PRIOR, oceanbase.DBMS_RANDOM.VALUE()(0x7f59f0c4df80))(0x7f59f0c4b500)(:4)]), use_batch=false | | 7 - output([VIEW2.FFFFFF.PROD_TYPE(0x7f59f0d0cfa0)], [VIEW2.FFFFFF.ACCT_CCY(0x7f59f0d0d280)], [VIEW2.FFFFFF.SEQ_NO(0x7f59f0d0d560)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f59f0d0d840)], [VIEW2.FFFFFF.ACCT_NAME(0x7f59f0d0db20)]), filter(nil) | | access([VIEW2.FFFFFF.PROD_TYPE(0x7f59f0d0cfa0)], [VIEW2.FFFFFF.ACCT_CCY(0x7f59f0d0d280)], [VIEW2.FFFFFF.SEQ_NO(0x7f59f0d0d560)], | | [VIEW2.FFFFFF.BRANCH_ROLE(0x7f59f0d0d840)], [VIEW2.FFFFFF.ACCT_NAME(0x7f59f0d0db20)]) | | 8 - output([FFFFFF.PROD_TYPE(0x7f59f0c473c0)], [FFFFFF.ACCT_CCY(0x7f59f0c49050)], [FFFFFF.SEQ_NO(0x7f59f0c4ace0)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0c43e30)], [FFFFFF.ACCT_NAME(0x7f59f0c50c00)]), filter(nil) | | access([FFFFFF.PROD_TYPE(0x7f59f0c473c0)], [FFFFFF.ACCT_CCY(0x7f59f0c49050)], [FFFFFF.SEQ_NO(0x7f59f0c4ace0)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0c43e30)], [FFFFFF.ACCT_NAME(0x7f59f0c50c00)]), partitions(p0) | | is_index_back=false, is_global_index=false, | | range_key([FFFFFF.PROD_TYPE(0x7f59f0c473c0)], [FFFFFF.ACCT_CCY(0x7f59f0c49050)], [FFFFFF.SEQ_NO(0x7f59f0c4ace0)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true | | 9 - output([VIEW3.FFFFFF.PROD_TYPE(0x7f59f0d0e0f0)], [VIEW3.FFFFFF.ACCT_CCY(0x7f59f0d0e3d0)], [VIEW3.FFFFFF.SEQ_NO(0x7f59f0d0e6b0)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f59f0d0e990)], [VIEW3.FFFFFF.ACCT_NAME(0x7f59f0d0ec70)]), filter(nil), startup_filter([:4 | | IS NOT NULL(0x7f6250d5bf70)]) | | access([VIEW3.FFFFFF.PROD_TYPE(0x7f59f0d0e0f0)], [VIEW3.FFFFFF.ACCT_CCY(0x7f59f0d0e3d0)], [VIEW3.FFFFFF.SEQ_NO(0x7f59f0d0e6b0)], | | [VIEW3.FFFFFF.BRANCH_ROLE(0x7f59f0d0e990)], [VIEW3.FFFFFF.ACCT_NAME(0x7f59f0d0ec70)]) | | 10 - output([FFFFFF.PROD_TYPE(0x7f59f0d0be40)], [FFFFFF.ACCT_CCY(0x7f59f0d0c120)], [FFFFFF.SEQ_NO(0x7f59f0d0c400)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0d0c6e0)], [FFFFFF.ACCT_NAME(0x7f59f0d0c9c0)]), filter([:0 <= REGEXP_COUNT(cast(FFFFFF.BRANCH_ROLE(0x7f59f0d0c6e0), | | VARCHAR2(1048576 ))(0x7f6250d5c840), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c44d30))(0x7f6250d5d0e0)(0x7f6250d5d980)]) | | access([FFFFFF.PROD_TYPE(0x7f59f0d0be40)], [FFFFFF.ACCT_CCY(0x7f59f0d0c120)], [FFFFFF.SEQ_NO(0x7f59f0d0c400)], | | [FFFFFF.BRANCH_ROLE(0x7f59f0d0c6e0)], [FFFFFF.ACCT_NAME(0x7f59f0d0c9c0)]), partitions(p0) | | is_index_back=false, is_global_index=false, filter_before_indexback[false], | | range_key([FFFFFF.PROD_TYPE(0x7f59f0d0be40)], [FFFFFF.ACCT_CCY(0x7f59f0d0c120)], [FFFFFF.SEQ_NO(0x7f59f0d0c400)]), | | range(MIN,MIN,MIN ; MAX,MAX,MAX)always true, | | range_cond([:1 = FFFFFF.PROD_TYPE(0x7f59f0d0be40)(0x7f6250d5e240)], [:2 = FFFFFF.ACCT_CCY(0x7f59f0d0c120)(0x7f6250d5ead0)], | | [:3 = FFFFFF.SEQ_NO(0x7f59f0d0c400)(0x7f6250d5f360)]) | | 11 - output([B.BRANCH_ROLE(0x7f59f0c8e8e0)], [B.BRANCH(0x7f59f0ca9180)], [B.INTERNAL_CLIENT(0x7f59f0cbf580)], [B.COMPANY(0x7f59f0cc5c70)]), filter(nil) | | access([B.BRANCH_ROLE(0x7f59f0c8e8e0)], [B.BRANCH(0x7f59f0ca9180)], [B.INTERNAL_CLIENT(0x7f59f0cbf580)], [B.COMPANY(0x7f59f0cc5c70)]) | | 12 - output([VIEW4.XXXXXXX.BRANCH(0x7f59f0d29b70)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d2a6f0)], [VIEW4.XXXXXXX.COMPANY(0x7f59f0d2a9d0)], [REGEXP_SUBSTR(cast(VIEW4.XXXXXXX.BRANCH_ROLE(0x7f | | 59f0d29e50), VARCHAR2(1048576 ))(0x7f59f0c8a3f0), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c8af40), 1, VIEW4.LEVEL(0x7f59f0d2acb0))(0x7f59f0c88bb0)]), filter(nil) | | distinct([VIEW4.XXXXXXX.BRANCH(0x7f59f0d29b70)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d2a6f0)], [VIEW4.XXXXXXX.COMPANY(0x7f59f0d2a9d0)], [REGEXP_SUBSTR(cast(VIEW4.XXXXXXX.BRANCH_ROLE(0x | | 7f59f0d29e50), VARCHAR2(1048576 ))(0x7f59f0c8a3f0), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c8af40), 1, VIEW4.LEVEL(0x7f59f0d2acb0))(0x7f59f0c88bb0)]) | | 13 - output([VIEW4.XXXXXXX.BRANCH(0x7f59f0d29b70)], [VIEW4.XXXXXXX.BRANCH_ROLE(0x7f59f0d29e50)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d2a6f0)], | | [VIEW4.XXXXXXX.COMPANY(0x7f59f0d2a9d0)], [VIEW4.LEVEL(0x7f59f0d2acb0)]), filter([VIEW4.XXXXXXX.TRAN_BR_IND(0x7f59f0d2a410) = cast('Y', VARCHAR2(1048576 | | ))(0x7f59f0c87120)(0x7f59f0c7d700)], [VIEW4.XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d2a130) = cast('Y', VARCHAR2(1048576 ))(0x7f59f0c7c610)(0x7f59f0c72bf0)]) | | access([VIEW4.XXXXXXX.BRANCH(0x7f59f0d29b70)], [VIEW4.XXXXXXX.BRANCH_ROLE(0x7f59f0d29e50)], [VIEW4.XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d2a130)], | | [VIEW4.XXXXXXX.TRAN_BR_IND(0x7f59f0d2a410)], [VIEW4.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d2a6f0)], [VIEW4.XXXXXXX.COMPANY(0x7f59f0d2a9d0)], [VIEW4.LEVEL(0x7f59f0d2acb0)]) | | 14 - output([VIEW6.XXXXXXX.BRANCH(0x7f59f0d5b870)], [VIEW6.XXXXXXX.BRANCH_ROLE(0x7f59f0d5bb50)], [VIEW6.XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d5be30)], | | [VIEW6.XXXXXXX.TRAN_BR_IND(0x7f59f0d5c110)], [VIEW6.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d5c3f0)], [VIEW6.XXXXXXX.COMPANY(0x7f59f0d5c6d0)], [LEVEL(0x7f59f0c67f60)]), filter(nil) | | conds(nil), nl_params_([LEVEL(0x7f59f0c67f60)(:5)], [VIEW5.XXXXXXX.BRANCH(0x7f59f0d5a440)(:6)], [(T_OP_PRIOR, oceanbase.DBMS_RANDOM.VALUE()(0x7f59f0c70250))(0x7f59f0c6d7d0)(:7)]), | | use_batch=false | | 15 - output([VIEW5.XXXXXXX.BRANCH(0x7f59f0d5a440)], [VIEW5.XXXXXXX.BRANCH_ROLE(0x7f59f0d5a720)], [VIEW5.XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d5aa00)], | | [VIEW5.XXXXXXX.TRAN_BR_IND(0x7f59f0d5ace0)], [VIEW5.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d5afc0)], [VIEW5.XXXXXXX.COMPANY(0x7f59f0d5b2a0)]), filter(nil) | | access([VIEW5.XXXXXXX.BRANCH(0x7f59f0d5a440)], [VIEW5.XXXXXXX.BRANCH_ROLE(0x7f59f0d5a720)], [VIEW5.XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d5aa00)], | | [VIEW5.XXXXXXX.TRAN_BR_IND(0x7f59f0d5ace0)], [VIEW5.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d5afc0)], [VIEW5.XXXXXXX.COMPANY(0x7f59f0d5b2a0)]) | | 16 - output([XXXXXXX.BRANCH(0x7f59f0c6cfb0)], [XXXXXXX.BRANCH_ROLE(0x7f59f0c69a20)], [XXXXXXX.AUTO_INNER_FLAG(0x7f59f0c73340)], [XXXXXXX.TRAN_BR_IND(0x7f59f0c7de50)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f59f0c882b0)], [XXXXXXX.COMPANY(0x7f59f0c888b0)]), filter(nil) | | access([XXXXXXX.BRANCH(0x7f59f0c6cfb0)], [XXXXXXX.BRANCH_ROLE(0x7f59f0c69a20)], [XXXXXXX.AUTO_INNER_FLAG(0x7f59f0c73340)], [XXXXXXX.TRAN_BR_IND(0x7f59f0c7de50)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f59f0c882b0)], [XXXXXXX.COMPANY(0x7f59f0c888b0)]), partitions(p0) | | is_index_back=false, is_global_index=false, | | range_key([XXXXXXX.BRANCH(0x7f59f0c6cfb0)]), range(MIN ; MAX)always true | | 17 - output([VIEW6.XXXXXXX.BRANCH(0x7f59f0d5b870)], [VIEW6.XXXXXXX.BRANCH_ROLE(0x7f59f0d5bb50)], [VIEW6.XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d5be30)], | | [VIEW6.XXXXXXX.TRAN_BR_IND(0x7f59f0d5c110)], [VIEW6.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d5c3f0)], [VIEW6.XXXXXXX.COMPANY(0x7f59f0d5c6d0)]), filter(nil), startup_filter([:7 | | IS NOT NULL(0x7f6442ad9aa0)]) | | access([VIEW6.XXXXXXX.BRANCH(0x7f59f0d5b870)], [VIEW6.XXXXXXX.BRANCH_ROLE(0x7f59f0d5bb50)], [VIEW6.XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d5be30)], | | [VIEW6.XXXXXXX.TRAN_BR_IND(0x7f59f0d5c110)], [VIEW6.XXXXXXX.INTERNAL_CLIENT(0x7f59f0d5c3f0)], [VIEW6.XXXXXXX.COMPANY(0x7f59f0d5c6d0)]) | | 18 - output([XXXXXXX.BRANCH(0x7f59f0d50c40)], [XXXXXXX.BRANCH_ROLE(0x7f59f0d50f20)], [XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d51200)], [XXXXXXX.TRAN_BR_IND(0x7f59f0d556c0)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f59f0d59b80)], [XXXXXXX.COMPANY(0x7f59f0d59e60)]), filter([:5 <= REGEXP_COUNT(cast(XXXXXXX.BRANCH_ROLE(0x7f59f0d50f20), | | VARCHAR2(1048576 ))(0x7f6442ada370), cast('[^|]+', VARCHAR2(1048576 ))(0x7f59f0c6a920))(0x7f6442adac10)(0x7f6442adb4b0)]) | | access([XXXXXXX.BRANCH(0x7f59f0d50c40)], [XXXXXXX.BRANCH_ROLE(0x7f59f0d50f20)], [XXXXXXX.AUTO_INNER_FLAG(0x7f59f0d51200)], [XXXXXXX.TRAN_BR_IND(0x7f59f0d556c0)], | | [XXXXXXX.INTERNAL_CLIENT(0x7f59f0d59b80)], [XXXXXXX.COMPANY(0x7f59f0d59e60)]), partitions(p0) | | is_index_back=false, is_global_index=false, filter_before_indexback[false], | | range_key([XXXXXXX.BRANCH(0x7f59f0d50c40)]), range(MIN ; MAX)always true, | | range_cond([:6 = XXXXXXX.BRANCH(0x7f59f0d50c40)(0x7f6442adbd70)]) | | 19 - output(nil), filter(nil) | | access(nil), partitions(p0) | | is_index_back=false, is_global_index=true, | | range_key([C.BASE_ACCT_NO(0x7f59f0ca8e90)], [C.INTERNAL_KEY(0x7f59f0ca6760)]), range(MIN ; MAX), | | range_cond([C.BASE_ACCT_NO(0x7f59f0ca8e90) = (T_OP_CNN, (T_OP_CNN, :10, :11)(0x7f6442b63dc0), :12)(0x7f6442b648d0)(0x7f6442b653e0)]) | | Used Hint: | | ------------------------------------- | | /*+ | | | | */ | | Qb name trace: | | ------------------------------------- | | stmt_id:0, stmt_type:T_EXPLAIN | | stmt_id:1, SEL$1 > SEL$4A3BEEAA > SEL$B09914F6 | | stmt_id:2, SEL$2 | | stmt_id:3, SEL$3 | | stmt_id:4, SEL$4 | | stmt_id:5, parent:SEL$2 > SEL$9B6BAA9A | | stmt_id:6, parent:SEL$2 > SEL$9B6BAA9B | | stmt_id:7, parent:SEL$9B6BAA9B > SEL$E382C6D8_1 | | stmt_id:8, parent:SEL$3 > SEL$B648BD05 | | stmt_id:9, parent:SEL$3 > SEL$B648BD06 | | stmt_id:10, parent:SEL$B648BD06 > SEL$8174842E_1 | | Outline Data: | | ------------------------------------- | | /*+ | | BEGIN_OUTLINE_DATA | | USE_HASH_DISTINCT(@"SEL$B09914F6") | | LEADING(@"SEL$B09914F6" (("A"@"SEL$1" "B"@"SEL$1") "ENS_CBANK"."C"@"SEL$4")) | | USE_NL(@"SEL$B09914F6" "ENS_CBANK"."C"@"SEL$4") | | USE_HASH(@"SEL$B09914F6" "B"@"SEL$1") | | USE_HASH_DISTINCT(@"SEL$2") | | LEADING(@"SEL$9B6BAA9A" ("VIEW2"@"SEL$9B6BAA9A" "VIEW3"@"SEL$9B6BAA9A")) | | USE_NL(@"SEL$9B6BAA9A" "VIEW3"@"SEL$9B6BAA9A") | | FULL(@"SEL$9B6BAA9B" "ENS_CBANK"."FFFFFF"@"SEL$2") | | USE_DAS(@"SEL$9B6BAA9B" "ENS_CBANK"."FFFFFF"@"SEL$2") | | FULL(@"SEL$E382C6D8_1" "ENS_CBANK"."FFFFFF"@"SEL$2") | | USE_DAS(@"SEL$E382C6D8_1" "ENS_CBANK"."FFFFFF"@"SEL$2") | | USE_HASH_DISTINCT(@"SEL$3") | | LEADING(@"SEL$B648BD05" ("VIEW5"@"SEL$B648BD05" "VIEW6"@"SEL$B648BD05")) | | USE_NL(@"SEL$B648BD05" "VIEW6"@"SEL$B648BD05") | | FULL(@"SEL$B648BD06" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | USE_DAS(@"SEL$B648BD06" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | FULL(@"SEL$8174842E_1" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | USE_DAS(@"SEL$8174842E_1" "ENS_CBANK"."XXXXXXX"@"SEL$3") | | INDEX(@"SEL$B09914F6" "C"@"SEL$4" "IDX_CCCCCCC_GLOBAL_INDEX2") | | USE_DAS(@"SEL$B09914F6" "C"@"SEL$4") | | UNNEST(@"SEL$4") | | MERGE(@"SEL$4" > "SEL$4A3BEEAA") | | OPTIMIZER_FEATURES_ENABLE('4.2.1.0') | | END_OUTLINE_DATA | | */ | | Optimization Info: | | ------------------------------------- | | FFFFFF: | | table_rows:72 | | physical_range_rows:72 | | logical_range_rows:72 | | index_back_rows:0 | | output_rows:72 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | FFFFFF: | | table_rows:72 | | physical_range_rows:1 | | logical_range_rows:1 | | index_back_rows:0 | | output_rows:0 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[FFFFFF] | | stats version:1722575467958265 | | dynamic sampling level:0 | | XXXXXXX: | | table_rows:536 | | physical_range_rows:536 | | logical_range_rows:536 | | index_back_rows:0 | | output_rows:536 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[XXXXXXX] | | stats version:1722575463271440 | | dynamic sampling level:0 | | XXXXXXX: | | table_rows:536 | | physical_range_rows:1 | | logical_range_rows:1 | | index_back_rows:0 | | output_rows:0 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[XXXXXXX] | | stats version:1722575463271440 | | dynamic sampling level:0 | | C: | | table_rows:17289678 | | physical_range_rows:2 | | logical_range_rows:2 | | index_back_rows:0 | | output_rows:2 | | table_dop:1 | | dop_method:DAS DOP | | avaiable_index_name:[IDX_CCCCCCC_GLOBAL_INDEX2, IDX_CCCCCCCC_GLOBAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX1, IDX_CCCCCCCC_LOCAL_INDEX2, IDX_CCCCCCCC_LOCAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX4, IDX_CCCCCCCC_LOCAL_INDEX5, IDX_CCCCCCCC_LOCAL_INDEX6, IDX_CCCCCCCC_LOCAL_INDEX7, CCCCCCCC] | | pruned_index_name:[IDX_CCCCCCCC_GLOBAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX1, IDX_CCCCCCCC_LOCAL_INDEX2, IDX_CCCCCCCC_LOCAL_INDEX3, IDX_CCCCCCCC_LOCAL_INDEX4, IDX_CCCCCCCC_LOCAL_INDEX5, IDX_CCCCCCCC_LOCAL_INDEX6, IDX_CCCCCCCC_LOCAL_INDEX7, CCCCCCCC] | | stats version:1728378528448689 | | dynamic sampling level:0 | | Plan Type: | | LOCAL | | Note: | | Degree of Parallelisim is 1 because stmt contain pl_udf which force das scan | +---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+ 230 rows in set (0.027 sec)
驗證環節：
-- 差集比對: obclient [YZJ]> SELECT -> * -> FROM -> ( -> SELECT -> DISTINCT A.PROD_TYPE, -> A.ACCT_NAME, -> A.ACCT_CCY, -> A.SEQ_NO, -> B.BRANCH, -> B.INTERNAL_CLIENT, -> B.COMPANY -> FROM -> ( -> SELECT -> DISTINCT PROD_TYPE, -> ACCT_NAME, -> ACCT_CCY, -> SEQ_NO, -> REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1 , LEVEL) BRANCH_ROLE -> FROM FFFFFF -> CONNECT BY NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') -> AND PRIOR PROD_TYPE = PROD_TYPE -> AND PRIOR ACCT_CCY = ACCT_CCY -> AND PRIOR SEQ_NO = SEQ_NO -> AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL -> ) A, -> ( -> SELECT -> DISTINCT BRANCH, -> INTERNAL_CLIENT, -> COMPANY, -> REGEXP_SUBSTR (BRANCH_ROLE, '[^|]+', 1, LEVEL) BRANCH_ROLE -> FROM -> XXXXXXX -> WHERE -> AUTO_INNER_FLAG = 'Y' -> AND TRAN_BR_IND = 'Y' -> CONNECT BY -> NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') -> AND PRIOR BRANCH = BRANCH -> AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL -> ) B -> WHERE -> A.BRANCH_ROLE = B.BRANCH_ROLE -> AND NOT EXISTS ( -> SELECT -> 1 -> FROM -> CCCCCCCC C -> WHERE -> C.BASE_ACCT_NO = (B.BRANCH || A.PROD_TYPE || A.SEQ_NO) -> ) -> ) MINUS -> SELECT -> * -> FROM -> ( -> SELECT -> /*+ parallel(16) */ -> DISTINCT A.PROD_TYPE, -> A.ACCT_NAME, -> A.ACCT_CCY, -> A.SEQ_NO, -> B.BRANCH, -> B.INTERNAL_CLIENT, -> B.COMPANY -> FROM -> ( -> SELECT -> DISTINCT PROD_TYPE, -> ACCT_NAME, -> ACCT_CCY, -> SEQ_NO, -> REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1, LEVEL) BRANCH_ROLE -> FROM -> FFFFFF -> CONNECT BY -> NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') -> AND PRIOR PROD_TYPE = PROD_TYPE -> AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL -> ORDER BY -> PROD_TYPE -> ) A, -> ( -> SELECT -> DISTINCT BRANCH, -> INTERNAL_CLIENT, -> COMPANY, -> REGEXP_SUBSTR (BRANCH_ROLE, '[^|]+', 1, LEVEL) BRANCH_ROLE -> FROM -> XXXXXXX -> WHERE -> AUTO_INNER_FLAG = 'Y' -> AND TRAN_BR_IND = 'Y' -> CONNECT BY -> NOCYCLE LEVEL <= REGEXP_COUNT (BRANCH_ROLE, '[^|]+') -> AND PRIOR BRANCH = BRANCH -> AND PRIOR DBMS_RANDOM.VALUE IS NOT NULL -> ORDER BY -> BRANCH -> ) B -> WHERE -> A.BRANCH_ROLE = B.BRANCH_ROLE -> AND NOT EXISTS ( -> SELECT -> 1 -> FROM -> CCCCCCCC C -> WHERE -> C.BASE_ACCT_NO = (B.BRANCH || A.PROD_TYPE || A.SEQ_NO) -> ) -> ) -> -> ; Empty set (10.756 sec)
差集比對後是等價的，我換過幾個條件試過都是這樣，只能說業務開發想實現的邏輯沒寫全，我給完善了下。、
其實還有個更簡單，更激進的寫法，速度比上面我改寫的更快，考慮到金融行業的嚴謹性，沒敢給。
SELECT DISTINCT PROD_TYPE, ACCT_NAME, ACCT_CCY, SEQ_NO, REGEXP_SUBSTR(BRANCH_ROLE, '[^|]+', 1, LEVEL) BRANCH_ROLE FROM FFFFFF CONNECT BY LEVEL <= REGEXP_COUNT(BRANCH_ROLE, '[^|]+');
PG好像也有個函式能實現這種邏輯，速度直接秒殺，不過哥忘了。