在EM中使用SQL Access Advisor（SQL访问建议）优化SQL
以下实验来自Oracle 11.2.0.4.0
在EM中，可以先创建SQL优化集，选定若干需要优化的SQL语句。
然后选中刚刚创建的SQL优化集，使用SQL访问建议器对其进行分析。
分析结果查看：
由于在sqlplus中无法完整显示出输出，故先在SQL Developer中输出，再复制到文本文档：
在SQL Developer中运行
其中TASK_NAME可以在运行SQL访问建议时显示的PL/SQL代码中看到。
以下是部分输出实例：
在EM中，可以先创建SQL优化集，选定若干需要优化的SQL语句。
然后选中刚刚创建的SQL优化集，使用SQL访问建议器对其进行分析。
分析结果查看：
由于在sqlplus中无法完整显示出输出，故先在SQL Developer中输出，再复制到文本文档：
在SQL Developer中运行
点击(此处)折叠或打开
- select dbms_advisor.get_task_script(task_name => 'SQLACCESS4138632') from dual;
以下是部分输出实例：
点击(此处)折叠或打开
- "Rem SQL Access Advisor: Version 11.2.0.4.0 - Production
- Rem
- Rem Username: SYS
- Rem Task: SQLACCESS7370760
- Rem Execution date:
- Rem
-
- Rem
- Rem Repartitioning table "SH"."SALES
- Rem
Rem Creating new partitioned table
Rem
CREATE TABLE "SH"."SALES1"
( "PROD_ID" NUMBER,
"CUST_ID" NUMBER,
"TIME_ID" DATE,
"CHANNEL_ID" NUMBER,
"PROMO_ID" NUMBER,
"QUANTITY_SOLD" NUMBER(10,2),
"SELLER" NUMBER(6,0),
"FULFILLMENT_CENTER" NUMBER(6,0),
"COURIER_ORG" NUMBER(6,0),
"TAX_COUNTRY" VARCHAR2(3),
"TAX_REGION" VARCHAR2(3),
"AMOUNT_SOLD" NUMBER(10,2)
) SEGMENT CREATION IMMEDIATE
PCTFREE 10 PCTUSED 40 INITRANS 16 MAXTRANS 255
NOCOMPRESS LOGGING
TABLESPACE "USERS"
PARTITION BY HASH ("TIME_ID") PARTITIONS 32;
Rem
Rem Copying constraints to new partitioned table
Rem
ALTER TABLE "SH"."SALES1" ADD CONSTRAINT "SALES_UK1" UNIQUE ("PROD_ID", "CUST_ID", "PROMO_ID", "CHANNEL_ID", "TIME_ID") RELY DISABLE;
ALTER TABLE "SH"."SALES1" MODIFY ("AMOUNT_SOLD" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("TAX_COUNTRY" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("COURIER_ORG" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("FULFILLMENT_CENTER" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("SELLER" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("QUANTITY_SOLD" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("PROMO_ID" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("CHANNEL_ID" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("TIME_ID" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("CUST_ID" NOT NULL ENABLE);
ALTER TABLE "SH"."SALES1" MODIFY ("PROD_ID" NOT NULL ENABLE);
Rem
Rem Copying referential constraints to new partitioned table
Rem
ALTER TABLE "SH"."SALES1" ADD CONSTRAINT "SALES_CHANNELS_FK1" FOREIGN KEY ("CHANNEL_ID")
REFERENCES "SH"."CHANNELS" ("CHANNEL_ID") DISABLE;
ALTER TABLE "SH"."SALES1" ADD CONSTRAINT "SALES_CUSTOMERS_FK1" FOREIGN KEY ("CUST_ID")
REFERENCES "SH"."CUSTOMERS" ("CUST_ID") DISABLE;
ALTER TABLE "SH"."SALES1" ADD CONSTRAINT "SALES_PRODUCTS_FK1" FOREIGN KEY ("PROD_ID")
REFERENCES "SH"."PRODUCTS" ("PROD_ID") DISABLE;
ALTER TABLE "SH"."SALES1" ADD CONSTRAINT "SALES_PROMOTIONS_FK1" FOREIGN KEY ("PROMO_ID")
REFERENCES "SH"."PROMOTIONS" ("PROMO_ID") DISABLE;
Rem
Rem Populating new partitioned table with data from original table
Rem
INSERT /*+ APPEND */ INTO "SH"."SALES1"
SELECT * FROM "SH"."SALES";
COMMIT;
begin
dbms_stats.gather_table_stats('"SH"', '"SALES1"', NULL, dbms_stats.auto_sample_size);
end;
/
Rem
Rem Renaming tables to give new partitioned table the original table name
Rem
ALTER TABLE "SH"."SALES" RENAME TO "SALES11";
ALTER TABLE "SH"."SALES1" RENAME TO "SALES";
Rem
Rem Repartitioning table "SH"."TIMES"
Rem
SET SERVEROUTPUT ON
SET ECHO ON
Rem
Rem Creating new partitioned table
Rem
CREATE TABLE "SH"."TIMES1"
( "TIME_ID" DATE,
"DAY_NAME" VARCHAR2(13),
"DAY_NUMBER_IN_MONTH" VARCHAR2(2),
"DAY_NUMBER_IN_YEAR" VARCHAR2(3),
"CALENDAR_YEAR" VARCHAR2(4),
"CALENDAR_QUARTER_NUMBER" VARCHAR2(1),
"CALENDAR_MONTH_NUMBER" VARCHAR2(2),
"CALENDAR_WEEK_NUMBER" VARCHAR2(2),
"CALENDAR_MONTH_DESC" VARCHAR2(7),
"CALENDAR_QUARTER_DESC" VARCHAR2(6)
) SEGMENT CREATION IMMEDIATE
PCTFREE 10 PCTUSED 40 INITRANS 1 MAXTRANS 255
NOCOMPRESS LOGGING
TABLESPACE "USERS"
PARTITION BY HASH ("TIME_ID") PARTITIONS 32;
Rem
Rem Copying constraints to new partitioned table
Rem
ALTER TABLE "SH"."TIMES1" ADD CONSTRAINT "TIMES_PK1" PRIMARY KEY ("TIME_ID")
USING INDEX PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
TABLESPACE "USERS" ENABLE NOVALIDATE;
Rem
Rem Copying indexes to new partitioned table
Rem
CREATE UNIQUE INDEX "SH"."TIMES_PK1" ON "SH"."TIMES1" ("TIME_ID")
PCTFREE 10 INITRANS 2 MAXTRANS 255 COMPUTE STATISTICS
TABLESPACE "USERS" ;
Rem
Rem Populating new partitioned table with data from original table
Rem
INSERT /*+ APPEND */ INTO "SH"."TIMES1"
SELECT * FROM "SH"."TIMES";
COMMIT;
begin
dbms_stats.gather_table_stats('"SH"', '"TIMES1"', NULL, dbms_stats.auto_sample_size);
end;
/
Rem
Rem Renaming tables to give new partitioned table the original table name
Rem
ALTER TABLE "SH"."TIMES" RENAME TO "TIMES11";
ALTER TABLE "SH"."TIMES1" RENAME TO "TIMES";
CREATE MATERIALIZED VIEW LOG ON
"SH"."SALES"
WITH ROWID, SEQUENCE("TIME_ID")
INCLUDING NEW VALUES;
CREATE MATERIALIZED VIEW LOG ON
"SH"."PRODUCTS"
WITH PRIMARY KEY ;
CREATE MATERIALIZED VIEW LOG ON
"SH"."CUSTOMERS"
WITH PRIMARY KEY ;
CREATE MATERIALIZED VIEW LOG ON
"SH"."TIMES"
WITH PRIMARY KEY ;
CREATE MATERIALIZED VIEW LOG ON
"SH"."CHANNELS"
WITH PRIMARY KEY ;
CREATE MATERIALIZED VIEW LOG ON
"SH"."PROMOTIONS"
WITH PRIMARY KEY ;
CREATE MATERIALIZED VIEW "SYS"."MV$$_00170000"
REFRESH FAST WITH PRIMARY KEY
ENABLE QUERY REWRITE
AS SELECT "SH"."PROMOTIONS"."PROMO_COST" M1, "SH"."PROMOTIONS"."PROMO_ID" M2, "SH"."PROMOTIONS"."PROMO_NAME"
M3, "SH"."PROMOTIONS"."PROMO_TOTAL" M4 FROM SH.PROMOTIONS;
begin
dbms_stats.gather_table_stats('"SYS"','"MV$$_00170000"',NULL,dbms_stats.auto_sample_size);
end;
/
CREATE MATERIALIZED VIEW "SYS"."MV$$_00170001"
REFRESH FAST WITH PRIMARY KEY
ENABLE QUERY REWRITE
AS SELECT "SH"."CHANNELS"."CHANNEL_DESC" M1, "SH"."CHANNELS"."CHANNEL_ID" M2 FROM
SH.CHANNELS;
begin
dbms_stats.gather_table_stats('"SYS"','"MV$$_00170001"',NULL,dbms_stats.auto_sample_size);
end;
/
CREATE MATERIALIZED VIEW "SYS"."MV$$_00170002"
REFRESH FAST WITH PRIMARY KEY
ENABLE QUERY REWRITE
AS SELECT "SH"."TIMES"."CALENDAR_YEAR" M1, "SH"."TIMES"."TIME_ID" M2 FROM SH.TIMES;
begin
dbms_stats.gather_table_stats('"SYS"','"MV$$_00170002"',NULL,dbms_stats.auto_sample_size);
end;
/
CREATE MATERIALIZED VIEW "SYS"."MV$$_00170003"
REFRESH FAST WITH PRIMARY KEY
ENABLE QUERY REWRITE
AS SELECT "SH"."CUSTOMERS"."CUST_FIRST_NAME" M1, "SH"."CUSTOMERS"."CUST_GENDER"
M2, "SH"."CUSTOMERS"."CUST_ID" M3, "SH"."CUSTOMERS"."CUST_LAST_NAME" M4
FROM SH.CUSTOMERS;
begin
dbms_stats.gather_table_stats('"SYS"','"MV$$_00170003"',NULL,dbms_stats.auto_sample_size);
end;
/
CREATE MATERIALIZED VIEW "SYS"."MV$$_00170004"
REFRESH FAST WITH PRIMARY KEY
ENABLE QUERY REWRITE
AS SELECT "SH"."PRODUCTS"."PROD_DESC" M1, "SH"."PRODUCTS"."PROD_ID" M2, "SH"."PRODUCTS"."PROD_LIST_PRICE"
M3, "SH"."PRODUCTS"."PROD_MIN_PRICE" M4, "SH"."PRODUCTS"."PROD_NAME" M5,
"SH"."PRODUCTS"."PROD_TOTAL" M6 FROM SH.PRODUCTS;
begin
dbms_stats.gather_table_stats('"SYS"','"MV$$_00170004"',NULL,dbms_stats.auto_sample_size);
end;
/
CREATE MATERIALIZED VIEW "SYS"."MV$$_00170005"
REFRESH FAST WITH ROWID
ENABLE QUERY REWRITE
AS SELECT SH.SALES.TIME_ID C1, MAX("SH"."SALES"."TIME_ID") M1, COUNT(*) M2 FROM
SH.SALES GROUP BY SH.SALES.TIME_ID;
begin
dbms_stats.gather_table_stats('"SYS"','"MV$$_00170005"',NULL,dbms_stats.auto_sample_size);
end;
/
CREATE MATERIALIZED VIEW "SYS"."MV$$_00170006"
REFRESH FAST WITH ROWID
ENABLE QUERY REWRITE
AS SELECT MAX("SH"."SALES"."TIME_ID") M1, COUNT(*) M2 FROM SH.SALES;
begin
dbms_stats.gather_table_stats('"SYS"','"MV$$_00170006"',NULL,dbms_stats.auto_sample_size);
end;
/
CREATE INDEX "SH"."SALES_IDX$$_00170000"
ON "SH"."SALES"
("TIME_ID")
COMPUTE STATISTICS
LOCAL;
"
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转载于:http://blog.itpub.net/22621861/viewspace-2074386/