Oracle 12CR2查詢轉(zhuǎn)換教程之表擴(kuò)展詳解

2024-08-29 14:01:19

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供稿：網(wǎng)友

前言

在表擴(kuò)展中，對(duì)于讀取一個(gè)分區(qū)表部分?jǐn)?shù)據(jù)時(shí)優(yōu)化器會(huì)生成使用索引的執(zhí)行計(jì)劃?；谒饕龍?zhí)行計(jì)劃可以提高性能，但索引維護(hù)會(huì)增加開鎖。在許多數(shù)據(jù)庫(kù)中，DML只影響小部分?jǐn)?shù)據(jù)。對(duì)于頻繁更新的表表擴(kuò)展使用基于索引的執(zhí)行計(jì)劃。你可以在以讀取為主的數(shù)據(jù)上創(chuàng)建一個(gè)索引，在以頻繁變化的數(shù)據(jù)上消除索引開銷。通過這種方式，表擴(kuò)展在避免索引維護(hù)的同時(shí)提高了性能。

下面話不多說了，來一起看看詳細(xì)的介紹吧

表擴(kuò)展工作原理

表分區(qū)使用表擴(kuò)展成為可能。如果在一個(gè)分區(qū)表上創(chuàng)建一個(gè)本地索引，那么優(yōu)化器可能會(huì)標(biāo)記索引對(duì)于特定的分區(qū)不可使用。實(shí)際有些分區(qū)沒有創(chuàng)建索引。在表擴(kuò)展中，優(yōu)化器將查詢轉(zhuǎn)換為一個(gè)union all語句，讓一些子查詢?cè)L問創(chuàng)建索引的分區(qū)，一些子查詢?cè)L問沒有創(chuàng)建索引的分區(qū)。優(yōu)化器可以為每個(gè)分區(qū)選擇最有效的訪問路徑，而不管它是否存在于查詢所要訪問的所有分區(qū)中。

優(yōu)化器不總是會(huì)選擇表擴(kuò)展

.表擴(kuò)展是基于成本

當(dāng)數(shù)據(jù)庫(kù)訪問擴(kuò)展表的每個(gè)分區(qū)只會(huì)跨越union all的所有分支一次，數(shù)據(jù)庫(kù)所連接的任何表都是在分支中被訪問。

.語義問題可能導(dǎo)致表擴(kuò)展無效

例如，一個(gè)表出現(xiàn)在一個(gè)外連接的右邊對(duì)于表擴(kuò)展來說是無效的。

可以使用expand_table hint來控制表擴(kuò)展。這個(gè)hint會(huì)覆蓋基于成本的決策，但不會(huì)覆蓋語義檢查。

表擴(kuò)展使用場(chǎng)景

優(yōu)化器基于查詢中出現(xiàn)的謂詞條件對(duì)每個(gè)表必須被訪問的分區(qū)保持跟蹤。分區(qū)裁剪能讓優(yōu)化器使用表擴(kuò)展來生成更有效的執(zhí)行計(jì)劃。

下面的例子假設(shè)滿足以下條件:

.想要對(duì)sh.sales表執(zhí)行星型查詢，表sh.sales是基于time_id列進(jìn)行范圍分區(qū)的一個(gè)分區(qū)表。

.想要禁用特定分區(qū)上的索引來查看表擴(kuò)展的優(yōu)點(diǎn)。

操作步驟如下:

1.以sh用戶登錄數(shù)據(jù)庫(kù)

[oracle@jytest1 ~]$ sqlplus sh/*****@jypdbSQL*Plus: Release 12.2.0.1.0 Production on Wed Oct 31 18:09:54 2018Copyright (c) 1982, 2016, Oracle. All rights reserved.Last Successful login time: Wed Oct 24 2018 17:00:11 +08:00Connected to:Oracle Database 12c Enterprise Edition Release 12.2.0.1.0 - 64bit ProductionSQL>

2.執(zhí)行以下查詢

SQL> select * from sales where time_id >= to_date('2000-01-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss') and prod_id = 38;........... 38 2470 24-DEC-01  2 999  1 31.47 38 13440 24-DEC-01  2 999  1 31.47 38 490 28-DEC-01  2 999  1 31.47 38 8406 28-DEC-01  2 999  1 31.47 38 1466 31-DEC-01  3 351  1 31.47 38 4340 31-DEC-01  3 351  1 31.47 38 10658 31-DEC-01  3 351  1 31.47 38 11390 31-DEC-01  3 351  1 31.47 38 23226 31-DEC-01  3 351  1 31.474224 rows selected.

3.查詢執(zhí)行計(jì)劃

SQL> select * from table(dbms_xplan.display_cursor(null,null,'advanced allstats last runstats_last peeked_binds'));SQL_ID 214qgysqqz0k8, child number 0-------------------------------------select * from sales where time_id >= to_date('2000-01-01 00:00:00','syyyy-mm-dd hh24:mi:ss') and prod_id = 38Plan hash value: 2342444420-----------------------------------------------------------------------------------------------------------------------------------------------------------------------| Id | Operation     | Name  | Starts | E-Rows |E-Bytes| Cost (%CPU)| E-Time | Pstart| Pstop | A-Rows | A-Time | Buffers |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------| 0 | SELECT STATEMENT    |  | 1 | | | 224 (100)|  | | | 4224 |00:00:00.03 | 334 || 1 | PARTITION RANGE ITERATOR   |  | 1 | 5078 | 143K| 224 (0)| 00:00:01 | 13 | 28 | 4224 |00:00:00.03 | 334 || 2 | TABLE ACCESS BY LOCAL INDEX ROWID BATCHED| SALES  | 16 | 5078 | 143K| 224 (0)| 00:00:01 | 13 | 28 | 4224 |00:00:00.02 | 334 || 3 | BITMAP CONVERSION TO ROWIDS  |  | 8 | | |  |  | | | 4224 |00:00:00.01 | 24 ||* 4 | BITMAP INDEX SINGLE VALUE  | SALES_PROD_BIX | 8 | | |  |  | 13 | 28 | 8 |00:00:00.01 | 24 |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------Query Block Name / Object Alias (identified by operation id):------------------------------------------------------------- 1 - SEL$1 2 - SEL$1 / SALES@SEL$1Outline Data------------- /*+ BEGIN_OUTLINE_DATA IGNORE_OPTIM_EMBEDDED_HINTS OPTIMIZER_FEATURES_ENABLE('12.2.0.1') DB_VERSION('12.2.0.1') ALL_ROWS NO_PARALLEL OUTLINE_LEAF(@"SEL$1") BITMAP_TREE(@"SEL$1" "SALES"@"SEL$1" AND(("SALES"."PROD_ID"))) BATCH_TABLE_ACCESS_BY_ROWID(@"SEL$1" "SALES"@"SEL$1") END_OUTLINE_DATA */Predicate Information (identified by operation id):--------------------------------------------------- 4 - access("PROD_ID"=38)Column Projection Information (identified by operation id):----------------------------------------------------------- 1 - "PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22], "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 2 - "PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22], "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 3 - "SALES".ROWID[ROWID,10], "PROD_ID"[NUMBER,22] 4 - STRDEF[BM VAR, 10], STRDEF[BM VAR, 10], STRDEF[BM VAR, 7920], "PROD_ID"[NUMBER,22]Note----- - automatic DOP: Computed Degree of Parallelism is 1 because of parallel threshold58 rows selected.

在執(zhí)行計(jì)劃中的Pstart與Pstop列，顯示了優(yōu)化器判斷只需要訪問表的13到28分區(qū)。在優(yōu)化器已經(jīng)判斷了被訪問的分區(qū)之后，它將考慮所有這些分區(qū)上可以使用的索引。在上面的執(zhí)行計(jì)劃中，優(yōu)化器選擇使用sales_prod_bix位圖索引

4.禁用sales表中sales_1995分區(qū)上的索引;

SQL> alter index sales_prod_bix modify partition sales_1995 unusable;Index altered.

5.再次執(zhí)行之前的查詢語句，然后顯示執(zhí)行計(jì)劃，可以看到執(zhí)行計(jì)劃變成了由兩個(gè)子查詢組成的union all語句，第一個(gè)子查詢還是對(duì)13-28分區(qū)使用索引，第二個(gè)子查詢步驟對(duì)應(yīng)的Pstart與Pstop為invalid，id=11的過濾條件為”PROD_ID”=38,id=9的過濾條件為”SALES”.”TIME_ID”=TO_DATE(‘ 2000-01-01 00:00:00', ‘syyyy-mm-dd hh24:mi:ss')))這個(gè)過濾條件是為否的，所以過濾后的記錄為0，從對(duì)應(yīng)的A-Rows列也可以看到記錄為0

SQL> select * from table(dbms_xplan.display_cursor(null,null,'advanced allstats last runstats_last peeked_binds'));SQL_ID 214qgysqqz0k8, child number 0-------------------------------------select * from sales where time_id >= to_date('2000-01-01 00:00:00','syyyy-mm-dd hh24:mi:ss') and prod_id = 38Plan hash value: 238952339--------------------------------------------------------------------------------------------------------------------------------------------------------------------------| Id | Operation          | Name   | Starts | E-Rows |E-Bytes| Cost (%CPU)| E-Time | Pstart| Pstop | A-Rows | A-Time | Buffers |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------| 0 | SELECT STATEMENT        |    |  1 |  |  | 224 (100)|   |  |  | 4224 |00:00:00.05 |  334 || 1 | VIEW           | VW_TE_2  |  1 | 5079 | 431K| 224 (0)| 00:00:01 |  |  | 4224 |00:00:00.05 |  334 || 2 | UNION-ALL         |    |  1 |  |  |   |   |  |  | 4224 |00:00:00.05 |  334 || 3 | PARTITION RANGE ITERATOR     |    |  1 | 5078 | 143K| 224 (0)| 00:00:01 | 13 | 28 | 4224 |00:00:00.03 |  334 || 4 |  TABLE ACCESS BY LOCAL INDEX ROWID BATCHED | SALES   |  16 | 5078 | 143K| 224 (0)| 00:00:01 | 13 | 28 | 4224 |00:00:00.02 |  334 || 5 |  BITMAP CONVERSION TO ROWIDS    |    |  8 |  |  |   |   |  |  | 4224 |00:00:00.01 |  24 ||* 6 |  BITMAP INDEX SINGLE VALUE    | SALES_PROD_BIX |  8 |  |  |   |   | 13 | 28 |  8 |00:00:00.01 |  24 ||* 7 | FILTER          |    |  1 |  |  |   |   |  |  |  0 |00:00:00.01 |  0 || 8 |  PARTITION RANGE EMPTY      |    |  0 |  1 | 29 |  1 (0)| 00:00:01 |INVALID|INVALID|  0 |00:00:00.01 |  0 ||* 9 |  TABLE ACCESS BY LOCAL INDEX ROWID BATCHED| SALES   |  0 |  1 | 29 |  1 (0)| 00:00:01 |INVALID|INVALID|  0 |00:00:00.01 |  0 || 10 |  BITMAP CONVERSION TO ROWIDS    |    |  0 |  |  |   |   |  |  |  0 |00:00:00.01 |  0 ||* 11 |  BITMAP INDEX SINGLE VALUE    | SALES_PROD_BIX |  0 |  |  |   |   |INVALID|INVALID|  0 |00:00:00.01 |  0 |--------------------------------------------------------------------------------------------------------------------------------------------------------------------------Query Block Name / Object Alias (identified by operation id):------------------------------------------------------------- 1 - SET$D0A14387 / VW_TE_2@SEL$0A5B0FFE 2 - SET$D0A14387 3 - SET$D0A14387_1 4 - SET$D0A14387_1 / SALES@SEL$1 7 - SET$D0A14387_2 9 - SET$D0A14387_2 / SALES@SEL$1Outline Data------------- /*+  BEGIN_OUTLINE_DATA  IGNORE_OPTIM_EMBEDDED_HINTS  OPTIMIZER_FEATURES_ENABLE('12.2.0.1')  DB_VERSION('12.2.0.1')  ALL_ROWS  NO_PARALLEL  OUTLINE_LEAF(@"SET$D0A14387_2")  OUTLINE_LEAF(@"SET$D0A14387_1")  OUTLINE_LEAF(@"SET$D0A14387")  EXPAND_TABLE(@"SEL$1" "SALES"@"SEL$1")  OUTLINE_LEAF(@"SEL$0A5B0FFE")  OUTLINE(@"SET$D0A14387")  EXPAND_TABLE(@"SEL$1" "SALES"@"SEL$1")  OUTLINE(@"SEL$1")  NO_ACCESS(@"SEL$0A5B0FFE" "VW_TE_2"@"SEL$0A5B0FFE")  BITMAP_TREE(@"SET$D0A14387_1" "SALES"@"SEL$1" AND(("SALES"."PROD_ID")))  BATCH_TABLE_ACCESS_BY_ROWID(@"SET$D0A14387_1" "SALES"@"SEL$1")  BITMAP_TREE(@"SET$D0A14387_2" "SALES"@"SEL$1" AND(("SALES"."PROD_ID")))  BATCH_TABLE_ACCESS_BY_ROWID(@"SET$D0A14387_2" "SALES"@"SEL$1")  END_OUTLINE_DATA */Predicate Information (identified by operation id):--------------------------------------------------- 6 - access("PROD_ID"=38) 7 - filter(NULL IS NOT NULL) 9 - filter(("SALES"."TIME_ID"=TO_DATE(' 2000-01-01 00:00:00', 'syyyy-mm-dd    hh24:mi:ss'))) 11 - access("PROD_ID"=38)Column Projection Information (identified by operation id):----------------------------------------------------------- 1 - "ITEM_1"[NUMBER,22], "ITEM_2"[NUMBER,22], "ITEM_3"[DATE,7], "ITEM_4"[NUMBER,22], "ITEM_5"[NUMBER,22], "ITEM_6"[NUMBER,22], "ITEM_7"[NUMBER,22] 2 - STRDEF[22], STRDEF[22], STRDEF[7], STRDEF[22], STRDEF[22], STRDEF[22], STRDEF[22] 3 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 4 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 5 - "SALES".ROWID[ROWID,10], "SALES"."PROD_ID"[NUMBER,22] 6 - STRDEF[BM VAR, 10], STRDEF[BM VAR, 10], STRDEF[BM VAR, 7920], "SALES"."PROD_ID"[NUMBER,22] 7 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 8 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 9 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 10 - "SALES".ROWID[ROWID,10], "SALES"."PROD_ID"[NUMBER,22] 11 - STRDEF[BM VAR, 10], STRDEF[BM VAR, 10], STRDEF[BM VAR, 7920], "SALES"."PROD_ID"[NUMBER,22]Note----- - automatic DOP: Computed Degree of Parallelism is 1 because of parallel threshold93 rows selected.

6.禁用分區(qū)28上的索引(sales_q4_2003),它是查詢需要訪問的一個(gè)分區(qū):

SQL> alter index sales_prod_bix modify partition sales_q4_2003 unusable;Index altered.SQL> alter index sales_time_bix modify partition sales_q4_2003 unusable;Index altered.

通過禁用查詢需要訪問分區(qū)上的索引，查詢將不能再使用這些索引。

7.再次執(zhí)行查詢語句，其執(zhí)行計(jì)劃如下,執(zhí)行計(jì)劃變成了由三個(gè)子查詢組成的union all語句，相比之前查詢多的第三個(gè)子查詢對(duì)表sales的第28個(gè)分區(qū)執(zhí)行全表掃描，這里沒有索引可用，因?yàn)橐呀?jīng)禁用28分區(qū)上的索引了。

SQL> select * from table(dbms_xplan.display_cursor(null,null,'advanced allstats last runstats_last peeked_binds'));SQL_ID 214qgysqqz0k8, child number 0-------------------------------------select * from sales where time_id >= to_date('2000-01-01 00:00:00','syyyy-mm-dd hh24:mi:ss') and prod_id = 38Plan hash value: 3857158179-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| Id | Operation          | Name   | Starts | E-Rows |E-Bytes| Cost (%CPU)| E-Time | Pstart| Pstop | A-Rows | A-Time | Buffers | Reads |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| 0 | SELECT STATEMENT        |    |  1 |  |  | 225 (100)|   |  |  | 4224 |00:00:00.20 |  334 |  44 || 1 | VIEW           | VW_TE_2  |  1 | 5080 | 431K| 225 (0)| 00:00:01 |  |  | 4224 |00:00:00.20 |  334 |  44 || 2 | UNION-ALL         |    |  1 |  |  |   |   |  |  | 4224 |00:00:00.19 |  334 |  44 || 3 | PARTITION RANGE ITERATOR     |    |  1 | 5078 | 143K| 223 (0)| 00:00:01 | 13 | 27 | 4224 |00:00:00.17 |  334 |  44 || 4 |  TABLE ACCESS BY LOCAL INDEX ROWID BATCHED | SALES   |  15 | 5078 | 143K| 223 (0)| 00:00:01 | 13 | 27 | 4224 |00:00:00.16 |  334 |  44 || 5 |  BITMAP CONVERSION TO ROWIDS    |    |  8 |  |  |   |   |  |  | 4224 |00:00:00.03 |  24 |  16 ||* 6 |  BITMAP INDEX SINGLE VALUE    | SALES_PROD_BIX |  8 |  |  |   |   | 13 | 27 |  8 |00:00:00.03 |  24 |  16 ||* 7 | FILTER          |    |  1 |  |  |   |   |  |  |  0 |00:00:00.01 |  0 |  0 || 8 |  PARTITION RANGE EMPTY      |    |  0 |  1 | 29 |  1 (0)| 00:00:01 |INVALID|INVALID|  0 |00:00:00.01 |  0 |  0 ||* 9 |  TABLE ACCESS BY LOCAL INDEX ROWID BATCHED| SALES   |  0 |  1 | 29 |  1 (0)| 00:00:01 |INVALID|INVALID|  0 |00:00:00.01 |  0 |  0 || 10 |  BITMAP CONVERSION TO ROWIDS    |    |  0 |  |  |   |   |  |  |  0 |00:00:00.01 |  0 |  0 ||* 11 |  BITMAP INDEX SINGLE VALUE    | SALES_PROD_BIX |  0 |  |  |   |   |INVALID|INVALID|  0 |00:00:00.01 |  0 |  0 || 12 | PARTITION RANGE SINGLE      |    |  1 |  1 | 87 |  2 (0)| 00:00:01 | 28 | 28 |  0 |00:00:00.01 |  0 |  0 ||* 13 |  TABLE ACCESS FULL       | SALES   |  1 |  1 | 87 |  2 (0)| 00:00:01 | 28 | 28 |  0 |00:00:00.01 |  0 |  0 |-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------Query Block Name / Object Alias (identified by operation id):------------------------------------------------------------- 1 - SET$D0A14387 / VW_TE_2@SEL$0A5B0FFE 2 - SET$D0A14387 3 - SET$D0A14387_1 4 - SET$D0A14387_1 / SALES@SEL$1 7 - SET$D0A14387_2 9 - SET$D0A14387_2 / SALES@SEL$1 12 - SET$D0A14387_3 13 - SET$D0A14387_3 / SALES@SEL$1Outline Data------------- /*+  BEGIN_OUTLINE_DATA  IGNORE_OPTIM_EMBEDDED_HINTS  OPTIMIZER_FEATURES_ENABLE('12.2.0.1')  DB_VERSION('12.2.0.1')  ALL_ROWS  NO_PARALLEL  OUTLINE_LEAF(@"SET$D0A14387_3")  OUTLINE_LEAF(@"SET$D0A14387_2")  OUTLINE_LEAF(@"SET$D0A14387_1")  OUTLINE_LEAF(@"SET$D0A14387")  EXPAND_TABLE(@"SEL$1" "SALES"@"SEL$1")  OUTLINE_LEAF(@"SEL$0A5B0FFE")  OUTLINE(@"SET$D0A14387")  EXPAND_TABLE(@"SEL$1" "SALES"@"SEL$1")  OUTLINE(@"SEL$1")  NO_ACCESS(@"SEL$0A5B0FFE" "VW_TE_2"@"SEL$0A5B0FFE")  BITMAP_TREE(@"SET$D0A14387_1" "SALES"@"SEL$1" AND(("SALES"."PROD_ID")))  BATCH_TABLE_ACCESS_BY_ROWID(@"SET$D0A14387_1" "SALES"@"SEL$1")  BITMAP_TREE(@"SET$D0A14387_2" "SALES"@"SEL$1" AND(("SALES"."PROD_ID")))  BATCH_TABLE_ACCESS_BY_ROWID(@"SET$D0A14387_2" "SALES"@"SEL$1")  FULL(@"SET$D0A14387_3" "SALES"@"SEL$1")  END_OUTLINE_DATA */Predicate Information (identified by operation id):--------------------------------------------------- 6 - access("PROD_ID"=38) 7 - filter(NULL IS NOT NULL) 9 - filter(("SALES"."TIME_ID"=TO_DATE(' 2000-01-01 00:00:00', 'syyyy-mm-dd hh24:mi:ss'))) 11 - access("PROD_ID"=38) 13 - filter("PROD_ID"=38)Column Projection Information (identified by operation id):----------------------------------------------------------- 1 - "ITEM_1"[NUMBER,22], "ITEM_2"[NUMBER,22], "ITEM_3"[DATE,7], "ITEM_4"[NUMBER,22], "ITEM_5"[NUMBER,22], "ITEM_6"[NUMBER,22], "ITEM_7"[NUMBER,22] 2 - STRDEF[22], STRDEF[22], STRDEF[7], STRDEF[22], STRDEF[22], STRDEF[22], STRDEF[22] 3 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 4 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 5 - "SALES".ROWID[ROWID,10], "SALES"."PROD_ID"[NUMBER,22] 6 - STRDEF[BM VAR, 10], STRDEF[BM VAR, 10], STRDEF[BM VAR, 7920], "SALES"."PROD_ID"[NUMBER,22] 7 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 8 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 9 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 10 - "SALES".ROWID[ROWID,10], "SALES"."PROD_ID"[NUMBER,22] 11 - STRDEF[BM VAR, 10], STRDEF[BM VAR, 10], STRDEF[BM VAR, 7920], "SALES"."PROD_ID"[NUMBER,22] 12 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22] 13 - "SALES"."PROD_ID"[NUMBER,22], "SALES"."CUST_ID"[NUMBER,22], "SALES"."TIME_ID"[DATE,7], "SALES"."CHANNEL_ID"[NUMBER,22], "SALES"."PROMO_ID"[NUMBER,22],  "SALES"."QUANTITY_SOLD"[NUMBER,22], "SALES"."AMOUNT_SOLD"[NUMBER,22]Note----- - automatic DOP: Computed Degree of Parallelism is 1 because of parallel threshold103 rows selected.

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