-#\r
-# PostgreSQL Adviser top level makefile\r
-#\r
-\r
-PGFILEDESC = "PostgreSQL Index Advisor"\r
-\r
-ifdef USE_PGXS\r
-PGXS := $(shell pg_config --pgxs)\r
-include $(PGXS)\r
-else\r
-subdir = contrib/adviser\r
-top_builddir = ../..\r
-include $(top_builddir)/src/Makefile.global\r
-include $(top_srcdir)/contrib/contrib-global.mk\r
-endif\r
-\r
-\r
-all:\r
- $(MAKE) -C index_adviser $@\r
- $(MAKE) -C pg_advise $@\r
- $(MAKE) -C resources $@\r
- @echo "PostgreSQL Index Advisor successfully made. Ready to install."\r
-\r
-install:\r
- $(MAKE) -C index_adviser $@\r
- $(MAKE) -C pg_advise $@\r
- $(MAKE) -C resources $@\r
- @echo "PostgreSQL Index Advisor installed."\r
-\r
-uninstall:\r
- $(MAKE) -C index_adviser $@\r
- $(MAKE) -C pg_advise $@\r
- $(MAKE) -C resources $@\r
- @echo "PostgreSQL Index Advisor uninstalled."\r
-\r
-clean:\r
- $(MAKE) -C index_adviser $@\r
- $(MAKE) -C pg_advise $@\r
- $(MAKE) -C resources $@\r
+#
+# PostgreSQL Adviser top level makefile
+#
+
+PGFILEDESC = "PostgreSQL Index Advisor"
+
+ifdef USE_PGXS
+PGXS := $(shell pg_config --pgxs)
+include $(PGXS)
+else
+subdir = contrib/adviser
+top_builddir = ../..
+include $(top_builddir)/src/Makefile.global
+include $(top_srcdir)/contrib/contrib-global.mk
+endif
+
+
+all:
+ $(MAKE) -C index_adviser $@
+ $(MAKE) -C pg_advise $@
+ $(MAKE) -C resources $@
+ @echo "PostgreSQL Index Advisor successfully made. Ready to install."
+
+install:
+ $(MAKE) -C index_adviser $@
+ $(MAKE) -C pg_advise $@
+ $(MAKE) -C resources $@
+ @echo "PostgreSQL Index Advisor installed."
+
+uninstall:
+ $(MAKE) -C index_adviser $@
+ $(MAKE) -C pg_advise $@
+ $(MAKE) -C resources $@
+ @echo "PostgreSQL Index Advisor uninstalled."
+
+clean:
+ $(MAKE) -C index_adviser $@
+ $(MAKE) -C pg_advise $@
+ $(MAKE) -C resources $@
-As of now, this module contains only an index adviser. Please read index_adviser/README.index_advisery.\r
-\r
+As of now, this module contains only an index adviser. Please read index_adviser/README.index_advisery.
+
-\r
-create table index_advisory( reloid oid,\r
- attrs integer[],\r
- profit real,\r
- index_size integer,\r
- backend_pid integer,\r
- timestamp timestamptz);\r
-\r
-create index IA_reloid on index_advisory( reloid );\r
-create index IA_backend_pid on index_advisory( backend_pid );\r
+
+create table index_advisory( reloid oid,
+ attrs integer[],
+ profit real,
+ index_size integer,
+ backend_pid integer,
+ timestamp timestamptz);
+
+create index IA_reloid on index_advisory( reloid );
+create index IA_backend_pid on index_advisory( backend_pid );
-\r
-\c postgres test\r
-\r
-drop table if exists advise_index;\r
-drop view if exists advise_index;\r
-\r
-/* create the advise_index same as provided in the contrib module */;\r
-create table advise_index( reloid oid, attrs integer[], profit real,\r
- index_size integer, backend_pid integer,\r
- timestamp timestamptz);\r
-\r
-/* set the client to see the log messages generated by the Adviser */;\r
-set client_min_messages to log;\r
-\r
-/* As expected, the EXPLAIN will work */;\r
-explain select * from t where a = 100;\r
-\r
-select * from advise_index;\r
-\r
-/* Now lets drop the advise_index and see what ERROR it throws */;\r
-drop table if exists advise_index;\r
-drop view if exists advise_index;\r
-\r
-explain select * from t where a = 100;\r
-\r
-/* create another object by the same name (in the same namespace) */;\r
-create index advise_index on t1(a);\r
-\r
-/* advise_index does exist, but its not a table or view! */;\r
-explain select * from t where a = 100;\r
-\r
-/* now create a table named advise_index, but with a different signature! */;\r
-drop index advise_index;\r
-\r
-create table advise_index(a int);\r
-\r
-/* This ERROR comes from the executor, but we still see our DETAIL and HINT */;\r
-explain select * from t where a = 100;\r
-\r
-/* create a table with same signature but different name */;\r
-drop table if exists advise_index;\r
-drop view if exists advise_index;\r
-\r
-drop table if exists advise_index_data cascade;\r
-\r
-create table advise_index_data( reloid oid, attrs integer[], profit real,\r
- index_size integer, backend_pid integer,\r
- timestamp timestamptz);\r
-\r
-/* and a view on that table */;\r
-create view advise_index as select * from advise_index_data;\r
-\r
-/* now try to insert into the view, and notice the ERROR, DETAIL and HINT from executor */;\r
-explain select * from t where a = 100;\r
-\r
-/* now create a RULE on the view that redirects the INSERTs into the table */;\r
-create or replace rule advise_index_insert as\r
-ON INSERT to advise_index\r
-do instead\r
-INSERT into advise_index_data values (new.reloid, new.attrs, new.profit,\r
- new.index_size, new.backend_pid,\r
- new.timestamp) ;\r
-\r
-/* and voila, (internal) INSERT into the view succeeds! */;\r
-explain select * from t where a = 100;\r
-\r
-/* Now, lets try what happens under a read-only transaction */;\r
-begin;\r
-\r
-set transaction_read_only=t;\r
-\r
-show transaction_read_only;\r
-\r
-explain select * from t where a = 100;\r
-\r
-end;\r
-\r
-select * from advise_index;\r
-\r
-select * from advise_index_data;\r
+
+\c postgres test
+
+drop table if exists advise_index;
+drop view if exists advise_index;
+
+/* create the advise_index same as provided in the contrib module */;
+create table advise_index( reloid oid, attrs integer[], profit real,
+ index_size integer, backend_pid integer,
+ timestamp timestamptz);
+
+/* set the client to see the log messages generated by the Adviser */;
+set client_min_messages to log;
+
+/* As expected, the EXPLAIN will work */;
+explain select * from t where a = 100;
+
+select * from advise_index;
+
+/* Now lets drop the advise_index and see what ERROR it throws */;
+drop table if exists advise_index;
+drop view if exists advise_index;
+
+explain select * from t where a = 100;
+
+/* create another object by the same name (in the same namespace) */;
+create index advise_index on t1(a);
+
+/* advise_index does exist, but its not a table or view! */;
+explain select * from t where a = 100;
+
+/* now create a table named advise_index, but with a different signature! */;
+drop index advise_index;
+
+create table advise_index(a int);
+
+/* This ERROR comes from the executor, but we still see our DETAIL and HINT */;
+explain select * from t where a = 100;
+
+/* create a table with same signature but different name */;
+drop table if exists advise_index;
+drop view if exists advise_index;
+
+drop table if exists advise_index_data cascade;
+
+create table advise_index_data( reloid oid, attrs integer[], profit real,
+ index_size integer, backend_pid integer,
+ timestamp timestamptz);
+
+/* and a view on that table */;
+create view advise_index as select * from advise_index_data;
+
+/* now try to insert into the view, and notice the ERROR, DETAIL and HINT from executor */;
+explain select * from t where a = 100;
+
+/* now create a RULE on the view that redirects the INSERTs into the table */;
+create or replace rule advise_index_insert as
+ON INSERT to advise_index
+do instead
+INSERT into advise_index_data values (new.reloid, new.attrs, new.profit,
+ new.index_size, new.backend_pid,
+ new.timestamp) ;
+
+/* and voila, (internal) INSERT into the view succeeds! */;
+explain select * from t where a = 100;
+
+/* Now, lets try what happens under a read-only transaction */;
+begin;
+
+set transaction_read_only=t;
+
+show transaction_read_only;
+
+explain select * from t where a = 100;
+
+end;
+
+select * from advise_index;
+
+select * from advise_index_data;
-\r
-postgres=> \c postgres test\r
-You are now connected to database "postgres".\r
-postgres=>\r
-postgres=> drop table if exists advise_index;\r
-NOTICE: table "advise_index" does not exist, skipping\r
-DROP TABLE\r
-postgres=> drop view if exists advise_index;\r
-NOTICE: view "advise_index" does not exist, skipping\r
-DROP VIEW\r
-postgres=>\r
-postgres=> /* create the advise_index same as provided in the contrib module */;\r
-postgres=> create table advise_index( reloid oid, attrs integer[], profit real,\r
-postgres(> index_size integer, backend_pid integer,\r
-postgres(> timestamp timestamptz);\r
-CREATE TABLE\r
-postgres=>\r
-postgres=> /* set the client to see the log messages generated by the Adviser */;\r
-postgres=> set client_min_messages to log;\r
-SET\r
-postgres=>\r
-postgres=> /* As expected, the EXPLAIN will work */;\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
- QUERY PLAN\r
-----------------------------------------------------\r
- Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)\r
- Filter: (a = 100)\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> select * from advise_index;\r
- reloid | attrs | profit | index_size | backend_pid | timestamp\r
---------+-------+---------+------------+-------------+-------------------------------\r
- 16395 | {1} | 1782.72 | 2608 | 5256 | 2007-01-13 13:08:53.593+05:30\r
-(1 row)\r
-\r
-postgres=>\r
-postgres=> /* Now lets drop the advise_index and see what ERROR it throws */;\r
-postgres=> drop table if exists advise_index;\r
-DROP TABLE\r
-postgres=> drop view if exists advise_index;\r
-NOTICE: view "advise_index" does not exist, skipping\r
-DROP VIEW\r
-postgres=>\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
-ERROR: relation "advise_index" does not exist.\r
-DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.\r
-HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.\r
-postgres=>\r
-postgres=> /* create another object by the same name (in the same namespace) */;\r
-\r
-postgres=> create index advise_index on t1(a);\r
-CREATE INDEX\r
-postgres=>\r
-postgres=> /* advise_index does exist, but its not a table or view! */;\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
-ERROR: "advise_index" is not a table or view.\r
-DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.\r
-HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.\r
-postgres=>\r
-postgres=> /* now create a table named advise_index, but with a different signature! */;\r
-postgres=> drop index advise_index;\r
-DROP INDEX\r
-postgres=>\r
-postgres=> create table advise_index(a int);\r
-CREATE TABLE\r
-postgres=>\r
-postgres=> /* This ERROR comes from the executor, but we still see our DETAIL and HINT */;\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
-ERROR: INSERT has more expressions than target columns\r
-DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.\r
-HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.\r
-CONTEXT: SQL statement "insert into "advise_index" values( 16395, array[1], 1782.719482, 2608, 5256, now());"\r
-postgres=>\r
-postgres=> /* create a table with same signature but different name */;\r
-postgres=> drop table if exists advise_index;\r
-DROP TABLE\r
-postgres=> drop view if exists advise_index;\r
-NOTICE: view "advise_index" does not exist, skipping\r
-DROP VIEW\r
-postgres=>\r
-postgres=> drop table if exists advise_index_data cascade;\r
-NOTICE: table "advise_index_data" does not exist, skipping\r
-DROP TABLE\r
-postgres=>\r
-postgres=> create table advise_index_data( reloid oid, attrs integer[], profit real,\r
-postgres(> index_size integer, backend_pid integer,\r
-postgres(> timestamp timestamptz);\r
-CREATE TABLE\r
-postgres=>\r
-postgres=> /* and a view on that table */;\r
-postgres=> create view advise_index as select * from advise_index_data;\r
-CREATE VIEW\r
-postgres=>\r
-postgres=> /* now try to insert into the view, and notice the ERROR, DETAIL and HINT from executor */;\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
-ERROR: cannot insert into a view\r
-DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.\r
-HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.\r
-CONTEXT: SQL statement "insert into "advise_index" values( 16395, array[1], 1782.719482, 2608, 5256, now());"\r
-postgres=>\r
-postgres=> /* now create a RULE on the view that redirects the INSERTs into the\r
-table */;\r
-postgres=> create or replace rule advise_index_insert as\r
-postgres-> ON INSERT to advise_index\r
-postgres-> do instead\r
-postgres-> INSERT into advise_index_data values (new.reloid, new.attrs, new.profit,\r
-postgres(> new.index_size, new.backend_pid,\r
-postgres(> new.timestamp) ;\r
-CREATE RULE\r
-postgres=>\r
-postgres=> /* and voila, (internal) INSERT into the view succeeds! */;\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
- QUERY PLAN\r
-----------------------------------------------------\r
- Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)\r
- Filter: (a = 100)\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> /* Now, lets try what happens under a read-only transaction */;\r
-postgres=> begin;\r
-BEGIN\r
-postgres=>\r
-postgres=> set transaction_read_only=t;\r
-SET\r
-postgres=>\r
-postgres=> show transaction_read_only;\r
- transaction_read_only\r
------------------------\r
- on\r
-(1 row)\r
-\r
-postgres=>\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
-ERROR: transaction is read-only\r
-DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.\r
-HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.\r
-CONTEXT: SQL statement "insert into "advise_index" values( 16395, array[1], 1782.719482, 2608, 5256, now());"\r
-postgres=>\r
-postgres=> end;\r
-ROLLBACK\r
-postgres=>\r
-postgres=> select * from advise_index;\r
- reloid | attrs | profit | index_size | backend_pid | timestamp\r
---------+-------+---------+------------+-------------+------------------------------\r
- 16395 | {1} | 1782.72 | 2608 | 5256 | 2007-01-13 13:08:54.25+05:30\r
-(1 row)\r
-\r
-postgres=>\r
-postgres=> select * from advise_index_data;\r
- reloid | attrs | profit | index_size | backend_pid | timestamp\r
---------+-------+---------+------------+-------------+------------------------------\r
- 16395 | {1} | 1782.72 | 2608 | 5256 | 2007-01-13 13:08:54.25+05:30\r
-(1 row)\r
-\r
-postgres=>\r
+
+postgres=> \c postgres test
+You are now connected to database "postgres".
+postgres=>
+postgres=> drop table if exists advise_index;
+NOTICE: table "advise_index" does not exist, skipping
+DROP TABLE
+postgres=> drop view if exists advise_index;
+NOTICE: view "advise_index" does not exist, skipping
+DROP VIEW
+postgres=>
+postgres=> /* create the advise_index same as provided in the contrib module */;
+postgres=> create table advise_index( reloid oid, attrs integer[], profit real,
+postgres(> index_size integer, backend_pid integer,
+postgres(> timestamp timestamptz);
+CREATE TABLE
+postgres=>
+postgres=> /* set the client to see the log messages generated by the Adviser */;
+postgres=> set client_min_messages to log;
+SET
+postgres=>
+postgres=> /* As expected, the EXPLAIN will work */;
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ QUERY PLAN
+----------------------------------------------------
+ Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)
+ Filter: (a = 100)
+(2 rows)
+
+postgres=>
+postgres=> select * from advise_index;
+ reloid | attrs | profit | index_size | backend_pid | timestamp
+--------+-------+---------+------------+-------------+-------------------------------
+ 16395 | {1} | 1782.72 | 2608 | 5256 | 2007-01-13 13:08:53.593+05:30
+(1 row)
+
+postgres=>
+postgres=> /* Now lets drop the advise_index and see what ERROR it throws */;
+postgres=> drop table if exists advise_index;
+DROP TABLE
+postgres=> drop view if exists advise_index;
+NOTICE: view "advise_index" does not exist, skipping
+DROP VIEW
+postgres=>
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ERROR: relation "advise_index" does not exist.
+DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.
+HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.
+postgres=>
+postgres=> /* create another object by the same name (in the same namespace) */;
+
+postgres=> create index advise_index on t1(a);
+CREATE INDEX
+postgres=>
+postgres=> /* advise_index does exist, but its not a table or view! */;
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ERROR: "advise_index" is not a table or view.
+DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.
+HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.
+postgres=>
+postgres=> /* now create a table named advise_index, but with a different signature! */;
+postgres=> drop index advise_index;
+DROP INDEX
+postgres=>
+postgres=> create table advise_index(a int);
+CREATE TABLE
+postgres=>
+postgres=> /* This ERROR comes from the executor, but we still see our DETAIL and HINT */;
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ERROR: INSERT has more expressions than target columns
+DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.
+HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.
+CONTEXT: SQL statement "insert into "advise_index" values( 16395, array[1], 1782.719482, 2608, 5256, now());"
+postgres=>
+postgres=> /* create a table with same signature but different name */;
+postgres=> drop table if exists advise_index;
+DROP TABLE
+postgres=> drop view if exists advise_index;
+NOTICE: view "advise_index" does not exist, skipping
+DROP VIEW
+postgres=>
+postgres=> drop table if exists advise_index_data cascade;
+NOTICE: table "advise_index_data" does not exist, skipping
+DROP TABLE
+postgres=>
+postgres=> create table advise_index_data( reloid oid, attrs integer[], profit real,
+postgres(> index_size integer, backend_pid integer,
+postgres(> timestamp timestamptz);
+CREATE TABLE
+postgres=>
+postgres=> /* and a view on that table */;
+postgres=> create view advise_index as select * from advise_index_data;
+CREATE VIEW
+postgres=>
+postgres=> /* now try to insert into the view, and notice the ERROR, DETAIL and HINT from executor */;
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ERROR: cannot insert into a view
+DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.
+HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.
+CONTEXT: SQL statement "insert into "advise_index" values( 16395, array[1], 1782.719482, 2608, 5256, now());"
+postgres=>
+postgres=> /* now create a RULE on the view that redirects the INSERTs into the
+table */;
+postgres=> create or replace rule advise_index_insert as
+postgres-> ON INSERT to advise_index
+postgres-> do instead
+postgres-> INSERT into advise_index_data values (new.reloid, new.attrs, new.profit,
+postgres(> new.index_size, new.backend_pid,
+postgres(> new.timestamp) ;
+CREATE RULE
+postgres=>
+postgres=> /* and voila, (internal) INSERT into the view succeeds! */;
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ QUERY PLAN
+----------------------------------------------------
+ Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)
+ Filter: (a = 100)
+(2 rows)
+
+postgres=>
+postgres=> /* Now, lets try what happens under a read-only transaction */;
+postgres=> begin;
+BEGIN
+postgres=>
+postgres=> set transaction_read_only=t;
+SET
+postgres=>
+postgres=> show transaction_read_only;
+ transaction_read_only
+-----------------------
+ on
+(1 row)
+
+postgres=>
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ERROR: transaction is read-only
+DETAIL: Index Adviser uses "advise_index" table to store it's advisory. You should have INSERT permissions on a table or an (INSERT-able) view named "advise_index". Also, make sure that you are not running the Index Adviser under a read-only transaction.
+HINT: Please create the "advise_index" table using the script provided in pg_advise_index contrib module.
+CONTEXT: SQL statement "insert into "advise_index" values( 16395, array[1], 1782.719482, 2608, 5256, now());"
+postgres=>
+postgres=> end;
+ROLLBACK
+postgres=>
+postgres=> select * from advise_index;
+ reloid | attrs | profit | index_size | backend_pid | timestamp
+--------+-------+---------+------------+-------------+------------------------------
+ 16395 | {1} | 1782.72 | 2608 | 5256 | 2007-01-13 13:08:54.25+05:30
+(1 row)
+
+postgres=>
+postgres=> select * from advise_index_data;
+ reloid | attrs | profit | index_size | backend_pid | timestamp
+--------+-------+---------+------------+-------------+------------------------------
+ 16395 | {1} | 1782.72 | 2608 | 5256 | 2007-01-13 13:08:54.25+05:30
+(1 row)
+
+postgres=>
-\r
-create language plpgsql;\r
-\r
-drop schema if exists test cascade;\r
-\r
-drop user if exists test;\r
-\r
-create user test;\r
-\r
-create schema test authorization test;\r
-\r
-\c postgres test\r
-\r
-load '$libdir/plugins/index_adviser';\r
-\r
-drop view if exists select_index_advisory;\r
-drop function if exists show_index_advisory(index_advisory.backend_pid%type);\r
-drop table if exists index_advisory;\r
-\r
-\i contrib/pgadviser/resources/index_advisory.create.sql\r
-\r
-\i contrib/pgadviser/resources/show_index_advisory.create.sql\r
-\r
-\i contrib/pgadviser/resources/select_index_advisory.create.sql\r
-\r
-drop table if exists t, t1;\r
-\r
-create table t( a int, b int );\r
-\r
-insert into t select s, 99999-s from generate_series(0,99999) as s;\r
-\r
-analyze t;\r
-\r
-create table t1 as select * from t;\r
-\r
-/* notice no ANALYZE for T1 */;\r
-\r
-select count(*) from t;\r
-\r
-select count(*) from t1;\r
-\r
-/* stop here if you wish to run only pg_advise tool */;\r
-\r
-/* set the client to see the log messages generated by the Adviser */;\r
-set client_min_messages to log;\r
-\r
-explain select * from t where a = 100;\r
-\r
-explain select * from t where b = 100;\r
-\r
-explain select * from t where a = 100 and b = 100;\r
-\r
-explain select * from t where a = 100 or b = 100;\r
-\r
-/* now we shall test with T1 */;\r
-\r
-explain select * from t1 where a = 100;\r
-\r
-explain select * from t1 where b = 100;\r
-\r
-explain select * from t1 where a = 100 and b = 100;\r
-\r
-explain select * from t1 where a = 100 or b = 100;\r
-\r
-/* let's do some sensible join over these two tables */;\r
-explain \r
-select *\r
-from t,\r
- t1\r
-where t.a = 100\r
-and t1.a = 100\r
- or t.b = 100\r
- and t1.b = 100;\r
-\r
-/* following are the contents of the advise_index table */;\r
-select * from index_advisory;\r
-\r
-/* And following is the summary of the advices generated */;\r
-\r
-select * from select_index_advisory;\r
+
+create language plpgsql;
+
+drop schema if exists test cascade;
+
+drop user if exists test;
+
+create user test;
+
+create schema test authorization test;
+
+\c postgres test
+
+load '$libdir/plugins/index_adviser';
+
+drop view if exists select_index_advisory;
+drop function if exists show_index_advisory(index_advisory.backend_pid%type);
+drop table if exists index_advisory;
+
+\i contrib/pgadviser/resources/index_advisory.create.sql
+
+\i contrib/pgadviser/resources/show_index_advisory.create.sql
+
+\i contrib/pgadviser/resources/select_index_advisory.create.sql
+
+drop table if exists t, t1;
+
+create table t( a int, b int );
+
+insert into t select s, 99999-s from generate_series(0,99999) as s;
+
+analyze t;
+
+create table t1 as select * from t;
+
+/* notice no ANALYZE for T1 */;
+
+select count(*) from t;
+
+select count(*) from t1;
+
+/* stop here if you wish to run only pg_advise tool */;
+
+/* set the client to see the log messages generated by the Adviser */;
+set client_min_messages to log;
+
+explain select * from t where a = 100;
+
+explain select * from t where b = 100;
+
+explain select * from t where a = 100 and b = 100;
+
+explain select * from t where a = 100 or b = 100;
+
+/* now we shall test with T1 */;
+
+explain select * from t1 where a = 100;
+
+explain select * from t1 where b = 100;
+
+explain select * from t1 where a = 100 and b = 100;
+
+explain select * from t1 where a = 100 or b = 100;
+
+/* let's do some sensible join over these two tables */;
+explain
+select *
+from t,
+ t1
+where t.a = 100
+and t1.a = 100
+ or t.b = 100
+ and t1.b = 100;
+
+/* following are the contents of the advise_index table */;
+select * from index_advisory;
+
+/* And following is the summary of the advices generated */;
+
+select * from select_index_advisory;
-\r
-Welcome to psql 8.2.1, the PostgreSQL interactive terminal.\r
-\r
-Type: \copyright for distribution terms\r
- \h for help with SQL commands\r
- \? for help with psql commands\r
- \g or terminate with semicolon to execute query\r
- \q to quit\r
-\r
-Warning: Console code page (437) differs from Windows code page (1252)\r
- 8-bit characters may not work correctly. See psql reference\r
- page "Notes for Windows users" for details.\r
-\r
-postgres=# /*\r
-postgres*# You must start the session with something like:\r
-postgres*#\r
-postgres*# env PGOPTIONS='-c local_preload_libraries=libpg_index_adviser' psql postgres\r
-postgres*# */;\r
-postgres=#\r
-postgres=# create language plpgsql;\r
-CREATE LANGUAGE\r
-postgres=#\r
-postgres=# drop schema if exists test cascade;\r
-NOTICE: schema "test" does not exist, skipping\r
-DROP SCHEMA\r
-postgres=#\r
-postgres=# drop user if exists test;\r
-NOTICE: role "test" does not exist, skipping\r
-DROP ROLE\r
-postgres=#\r
-postgres=# create user test;\r
-CREATE ROLE\r
-postgres=#\r
-postgres=# create schema test authorization test;\r
-CREATE SCHEMA\r
-postgres=#\r
-postgres=# \c postgres test\r
-You are now connected to database "postgres" as user "test".\r
-postgres=>\r
-postgres=> drop table if exists advise_index;\r
-NOTICE: table "advise_index" does not exist, skipping\r
-DROP TABLE\r
-postgres=>\r
-postgres=> \i contrib/pg_index_adviser/advise_index.create.sql\r
-CREATE TABLE\r
-postgres=>\r
-postgres=> \d advise_index;\r
- Table "test.advise_index"\r
- Column | Type | Modifiers\r
--------------+--------------------------+-----------\r
- reloid | oid |\r
- attrs | integer[] |\r
- profit | real |\r
- index_size | integer |\r
- backend_pid | integer |\r
- timestamp | timestamp with time zone |\r
-\r
-postgres=>\r
-postgres=> \i contrib/pg_index_adviser/advise_index_show.create.sql\r
-CREATE FUNCTION\r
-postgres=>\r
-postgres=> select * from advise_index;\r
- reloid | attrs | profit | index_size | backend_pid | timestamp\r
---------+-------+--------+------------+-------------+-----------\r
-(0 rows)\r
-\r
-postgres=>\r
-postgres=> drop table if exists t, t1;\r
-NOTICE: table "t" does not exist, skipping\r
-NOTICE: table "t1" does not exist, skipping\r
-DROP TABLE\r
-postgres=>\r
-postgres=> create table t( a int, b int );\r
-CREATE TABLE\r
-postgres=>\r
-postgres=> insert into t select s, 99999-s from generate_series(0,99999) as s;\r
-INSERT 0 100000\r
-postgres=>\r
-postgres=> analyze t;\r
-ANALYZE\r
-postgres=>\r
-postgres=> create table t1 as select * from t;\r
-SELECT\r
-postgres=>\r
-postgres=> /* notice no ANALYZE for T1 */;\r
-postgres=>\r
-postgres=> select count(*) from t;\r
- count\r
---------\r
- 100000\r
-(1 row)\r
-\r
-postgres=>\r
-postgres=> select count(*) from t1;\r
- count\r
---------\r
- 100000\r
-(1 row)\r
-\r
-postgres=>\r
-postgres=> /* stop here if you wish to run only pg_advise_index tool */;\r
-postgres=>\r
-postgres=> -- set enable_advise_index to true;\r
-postgres=> /* set the client to see the log messages generated by the Adviser */\r
-;\r
-postgres=> set client_min_messages to log;\r
-SET\r
-postgres=>\r
-postgres=> explain select * from t where a = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (a = 100)\r
-\r
- QUERY PLAN\r
-----------------------------------------------------\r
- Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)\r
- Filter: (a = 100)\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> explain select * from t where b = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (b = 100)\r
-\r
- QUERY PLAN\r
-----------------------------------------------------\r
- Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)\r
- Filter: (b = 100)\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> explain select * from t where a = 100 and b = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Index Scan using idx_adv_1 on t (cost=0.00..8.28 rows=1 width=8)\r
- Index Cond: (b = 100)\r
- Filter: (a = 100)\r
-\r
- QUERY PLAN\r
-----------------------------------------------------\r
- Seq Scan on t (cost=0.00..2041.00 rows=1 width=8)\r
- Filter: ((a = 100) AND (b = 100))\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> explain select * from t where a = 100 or b = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Bitmap Heap Scan on t (cost=8.54..16.21 rows=2 width=8)\r
- Recheck Cond: ((a = 100) OR (b = 100))\r
- -> BitmapOr (cost=8.54..8.54 rows=2 width=0)\r
- -> Bitmap Index Scan on idx_adv_0 (cost=0.00..4.27 rows=1 width=0)\r
- Index Cond: (a = 100)\r
- -> Bitmap Index Scan on idx_adv_1 (cost=0.00..4.27 rows=1 width=0)\r
- Index Cond: (b = 100)\r
-\r
- QUERY PLAN\r
-----------------------------------------------------\r
- Seq Scan on t (cost=0.00..2041.00 rows=2 width=8)\r
- Filter: ((a = 100) OR (b = 100))\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> /* now we shall test with T1 */;\r
-postgres=>\r
-postgres=> explain select * from t1 where a = 100;\r
- QUERY PLAN\r
--------------------------------------------------------\r
- Seq Scan on t1 (cost=0.00..1852.93 rows=525 width=8)\r
- Filter: (a = 100)\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> explain select * from t1 where b = 100;\r
- QUERY PLAN\r
--------------------------------------------------------\r
- Seq Scan on t1 (cost=0.00..1852.93 rows=525 width=8)\r
- Filter: (b = 100)\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> explain select * from t1 where a = 100 and b = 100;\r
- QUERY PLAN\r
------------------------------------------------------\r
- Seq Scan on t1 (cost=0.00..2115.31 rows=3 width=8)\r
- Filter: ((a = 100) AND (b = 100))\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> explain select * from t1 where a = 100 or b = 100;\r
- QUERY PLAN\r
---------------------------------------------------------\r
- Seq Scan on t1 (cost=0.00..2115.31 rows=1047 width=8)\r
- Filter: ((a = 100) OR (b = 100))\r
-(2 rows)\r
-\r
-postgres=>\r
-postgres=> /* let's do some sensible join over these two tables */;\r
-postgres=> explain\r
-postgres-> select *\r
-postgres-> from t,\r
-postgres-> t1\r
-postgres-> where t.a = 100\r
-postgres-> and t1.a = 100\r
-postgres-> or t.b = 100\r
-postgres-> and t1.b = 100;\r
-LOG: Index Adviser: Plan using estimates for suggested indexes:\r
-\r
-Nested Loop (cost=8.54..7395.45 rows=1050 width=16)\r
- Join Filter: (((t.a = 100) AND (t1.a = 100)) OR ((t.b = 100) AND (t1.b = 100)))\r
- -> Bitmap Heap Scan on t (cost=8.54..16.21 rows=2 width=8)\r
- Recheck Cond: ((a = 100) OR (b = 100))\r
- -> BitmapOr (cost=8.54..8.54 rows=2 width=0)\r
- -> Bitmap Index Scan on idx_adv_0 (cost=0.00..4.27 rows=1 width=0)\r
- Index Cond: (a = 100)\r
- -> Bitmap Index Scan on idx_adv_1 (cost=0.00..4.27 rows=1 width=0)\r
- Index Cond: (b = 100)\r
- -> Seq Scan on t1 (cost=0.00..1590.54 rows=104954 width=8)\r
-\r
- QUERY PLAN\r
------------------------------------------------------------------------------------\r
- Nested Loop (cost=0.00..368963541.00 rows=1050 width=16)\r
- Join Filter: (((t.a = 100) AND (t1.a = 100)) OR ((t.b = 100) AND (t1.b = 100)))\r
- -> Seq Scan on t (cost=0.00..1541.00 rows=100000 width=8)\r
- -> Seq Scan on t1 (cost=0.00..1590.54 rows=104954 width=8)\r
-(4 rows)\r
-\r
-postgres=>\r
-postgres=> /* following are the contents of the advise_index table */;\r
-postgres=> select * from advise_index;\r
- reloid | attrs | profit | index_size | backend_pid | timestamp\r
---------+-------+--------------+------------+-------------+-------------------------------\r
- 16395 | {1} | 1782.72 | 2608 | 2272 | 2007-01-13 12:30:02.39+05:30\r
- 16395 | {2} | 1782.72 | 2608 | 2272 | 2007-01-13 12:30:02.531+05:30\r
- 16395 | {2} | 2032.72 | 2608 | 2272 | 2007-01-13 12:30:02.578+05:30\r
- 16395 | {1} | 1012.4 | 2608 | 2272 | 2007-01-13 12:30:02.64+05:30\r
- 16395 | {2} | 1012.4 | 2608 | 2272 | 2007-01-13 12:30:02.64+05:30\r
- 16395 | {1} | 1.84478e+008 | 2608 | 2272 | 2007-01-13 12:30:17.984+05:30\r
- 16395 | {2} | 1.84478e+008 | 2608 | 2272 | 2007-01-13 12:30:17.984+05:30\r
-(7 rows)\r
-\r
-postgres=>\r
-postgres=> /* And following is the summary of the advices generated */;\r
-postgres=>\r
-postgres=> select E'backend_pid\n'\r
-postgres-> || E'===========\n'\r
-postgres-> || backend_pid,\r
-postgres-> advise_index_show( backend_pid )\r
-postgres-> from (select distinct backend_pid\r
-postgres(> from advise_index as adv\r
-postgres(> where adv.reloid in (select oid\r
-postgres(> from pg_class\r
-postgres(> where relkind = 'r')\r
-postgres(> ) as v;\r
- ?column? | advise_index_show\r
--------------+--------------------------------------------------------------------\r
- backend_pid | /* Index Adviser */\r
- =========== : /* ============= */\r
- 2272 :\r
- : /* size: 2608 KB, benefit: 1.84483e+008, gain: 70737.3067484663 */\r
- : create index idx_t_b on t(b);\r
- :\r
- : /* size: 2608 KB, benefit: 1.84481e+008, gain: 70736.527607362 */\r
- : create index idx_t_a on t(a);\r
- :\r
-(1 row)\r
-\r
-postgres=>\r
+
+Welcome to psql 8.2.1, the PostgreSQL interactive terminal.
+
+Type: \copyright for distribution terms
+ \h for help with SQL commands
+ \? for help with psql commands
+ \g or terminate with semicolon to execute query
+ \q to quit
+
+Warning: Console code page (437) differs from Windows code page (1252)
+ 8-bit characters may not work correctly. See psql reference
+ page "Notes for Windows users" for details.
+
+postgres=# /*
+postgres*# You must start the session with something like:
+postgres*#
+postgres*# env PGOPTIONS='-c local_preload_libraries=libpg_index_adviser' psql postgres
+postgres*# */;
+postgres=#
+postgres=# create language plpgsql;
+CREATE LANGUAGE
+postgres=#
+postgres=# drop schema if exists test cascade;
+NOTICE: schema "test" does not exist, skipping
+DROP SCHEMA
+postgres=#
+postgres=# drop user if exists test;
+NOTICE: role "test" does not exist, skipping
+DROP ROLE
+postgres=#
+postgres=# create user test;
+CREATE ROLE
+postgres=#
+postgres=# create schema test authorization test;
+CREATE SCHEMA
+postgres=#
+postgres=# \c postgres test
+You are now connected to database "postgres" as user "test".
+postgres=>
+postgres=> drop table if exists advise_index;
+NOTICE: table "advise_index" does not exist, skipping
+DROP TABLE
+postgres=>
+postgres=> \i contrib/pg_index_adviser/advise_index.create.sql
+CREATE TABLE
+postgres=>
+postgres=> \d advise_index;
+ Table "test.advise_index"
+ Column | Type | Modifiers
+-------------+--------------------------+-----------
+ reloid | oid |
+ attrs | integer[] |
+ profit | real |
+ index_size | integer |
+ backend_pid | integer |
+ timestamp | timestamp with time zone |
+
+postgres=>
+postgres=> \i contrib/pg_index_adviser/advise_index_show.create.sql
+CREATE FUNCTION
+postgres=>
+postgres=> select * from advise_index;
+ reloid | attrs | profit | index_size | backend_pid | timestamp
+--------+-------+--------+------------+-------------+-----------
+(0 rows)
+
+postgres=>
+postgres=> drop table if exists t, t1;
+NOTICE: table "t" does not exist, skipping
+NOTICE: table "t1" does not exist, skipping
+DROP TABLE
+postgres=>
+postgres=> create table t( a int, b int );
+CREATE TABLE
+postgres=>
+postgres=> insert into t select s, 99999-s from generate_series(0,99999) as s;
+INSERT 0 100000
+postgres=>
+postgres=> analyze t;
+ANALYZE
+postgres=>
+postgres=> create table t1 as select * from t;
+SELECT
+postgres=>
+postgres=> /* notice no ANALYZE for T1 */;
+postgres=>
+postgres=> select count(*) from t;
+ count
+--------
+ 100000
+(1 row)
+
+postgres=>
+postgres=> select count(*) from t1;
+ count
+--------
+ 100000
+(1 row)
+
+postgres=>
+postgres=> /* stop here if you wish to run only pg_advise_index tool */;
+postgres=>
+postgres=> -- set enable_advise_index to true;
+postgres=> /* set the client to see the log messages generated by the Adviser */
+;
+postgres=> set client_min_messages to log;
+SET
+postgres=>
+postgres=> explain select * from t where a = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (a = 100)
+
+ QUERY PLAN
+----------------------------------------------------
+ Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)
+ Filter: (a = 100)
+(2 rows)
+
+postgres=>
+postgres=> explain select * from t where b = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_0 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (b = 100)
+
+ QUERY PLAN
+----------------------------------------------------
+ Seq Scan on t (cost=0.00..1791.00 rows=1 width=8)
+ Filter: (b = 100)
+(2 rows)
+
+postgres=>
+postgres=> explain select * from t where a = 100 and b = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Index Scan using idx_adv_1 on t (cost=0.00..8.28 rows=1 width=8)
+ Index Cond: (b = 100)
+ Filter: (a = 100)
+
+ QUERY PLAN
+----------------------------------------------------
+ Seq Scan on t (cost=0.00..2041.00 rows=1 width=8)
+ Filter: ((a = 100) AND (b = 100))
+(2 rows)
+
+postgres=>
+postgres=> explain select * from t where a = 100 or b = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Bitmap Heap Scan on t (cost=8.54..16.21 rows=2 width=8)
+ Recheck Cond: ((a = 100) OR (b = 100))
+ -> BitmapOr (cost=8.54..8.54 rows=2 width=0)
+ -> Bitmap Index Scan on idx_adv_0 (cost=0.00..4.27 rows=1 width=0)
+ Index Cond: (a = 100)
+ -> Bitmap Index Scan on idx_adv_1 (cost=0.00..4.27 rows=1 width=0)
+ Index Cond: (b = 100)
+
+ QUERY PLAN
+----------------------------------------------------
+ Seq Scan on t (cost=0.00..2041.00 rows=2 width=8)
+ Filter: ((a = 100) OR (b = 100))
+(2 rows)
+
+postgres=>
+postgres=> /* now we shall test with T1 */;
+postgres=>
+postgres=> explain select * from t1 where a = 100;
+ QUERY PLAN
+-------------------------------------------------------
+ Seq Scan on t1 (cost=0.00..1852.93 rows=525 width=8)
+ Filter: (a = 100)
+(2 rows)
+
+postgres=>
+postgres=> explain select * from t1 where b = 100;
+ QUERY PLAN
+-------------------------------------------------------
+ Seq Scan on t1 (cost=0.00..1852.93 rows=525 width=8)
+ Filter: (b = 100)
+(2 rows)
+
+postgres=>
+postgres=> explain select * from t1 where a = 100 and b = 100;
+ QUERY PLAN
+-----------------------------------------------------
+ Seq Scan on t1 (cost=0.00..2115.31 rows=3 width=8)
+ Filter: ((a = 100) AND (b = 100))
+(2 rows)
+
+postgres=>
+postgres=> explain select * from t1 where a = 100 or b = 100;
+ QUERY PLAN
+--------------------------------------------------------
+ Seq Scan on t1 (cost=0.00..2115.31 rows=1047 width=8)
+ Filter: ((a = 100) OR (b = 100))
+(2 rows)
+
+postgres=>
+postgres=> /* let's do some sensible join over these two tables */;
+postgres=> explain
+postgres-> select *
+postgres-> from t,
+postgres-> t1
+postgres-> where t.a = 100
+postgres-> and t1.a = 100
+postgres-> or t.b = 100
+postgres-> and t1.b = 100;
+LOG: Index Adviser: Plan using estimates for suggested indexes:
+
+Nested Loop (cost=8.54..7395.45 rows=1050 width=16)
+ Join Filter: (((t.a = 100) AND (t1.a = 100)) OR ((t.b = 100) AND (t1.b = 100)))
+ -> Bitmap Heap Scan on t (cost=8.54..16.21 rows=2 width=8)
+ Recheck Cond: ((a = 100) OR (b = 100))
+ -> BitmapOr (cost=8.54..8.54 rows=2 width=0)
+ -> Bitmap Index Scan on idx_adv_0 (cost=0.00..4.27 rows=1 width=0)
+ Index Cond: (a = 100)
+ -> Bitmap Index Scan on idx_adv_1 (cost=0.00..4.27 rows=1 width=0)
+ Index Cond: (b = 100)
+ -> Seq Scan on t1 (cost=0.00..1590.54 rows=104954 width=8)
+
+ QUERY PLAN
+-----------------------------------------------------------------------------------
+ Nested Loop (cost=0.00..368963541.00 rows=1050 width=16)
+ Join Filter: (((t.a = 100) AND (t1.a = 100)) OR ((t.b = 100) AND (t1.b = 100)))
+ -> Seq Scan on t (cost=0.00..1541.00 rows=100000 width=8)
+ -> Seq Scan on t1 (cost=0.00..1590.54 rows=104954 width=8)
+(4 rows)
+
+postgres=>
+postgres=> /* following are the contents of the advise_index table */;
+postgres=> select * from advise_index;
+ reloid | attrs | profit | index_size | backend_pid | timestamp
+--------+-------+--------------+------------+-------------+-------------------------------
+ 16395 | {1} | 1782.72 | 2608 | 2272 | 2007-01-13 12:30:02.39+05:30
+ 16395 | {2} | 1782.72 | 2608 | 2272 | 2007-01-13 12:30:02.531+05:30
+ 16395 | {2} | 2032.72 | 2608 | 2272 | 2007-01-13 12:30:02.578+05:30
+ 16395 | {1} | 1012.4 | 2608 | 2272 | 2007-01-13 12:30:02.64+05:30
+ 16395 | {2} | 1012.4 | 2608 | 2272 | 2007-01-13 12:30:02.64+05:30
+ 16395 | {1} | 1.84478e+008 | 2608 | 2272 | 2007-01-13 12:30:17.984+05:30
+ 16395 | {2} | 1.84478e+008 | 2608 | 2272 | 2007-01-13 12:30:17.984+05:30
+(7 rows)
+
+postgres=>
+postgres=> /* And following is the summary of the advices generated */;
+postgres=>
+postgres=> select E'backend_pid\n'
+postgres-> || E'===========\n'
+postgres-> || backend_pid,
+postgres-> advise_index_show( backend_pid )
+postgres-> from (select distinct backend_pid
+postgres(> from advise_index as adv
+postgres(> where adv.reloid in (select oid
+postgres(> from pg_class
+postgres(> where relkind = 'r')
+postgres(> ) as v;
+ ?column? | advise_index_show
+-------------+--------------------------------------------------------------------
+ backend_pid | /* Index Adviser */
+ =========== : /* ============= */
+ 2272 :
+ : /* size: 2608 KB, benefit: 1.84483e+008, gain: 70737.3067484663 */
+ : create index idx_t_b on t(b);
+ :
+ : /* size: 2608 KB, benefit: 1.84481e+008, gain: 70736.527607362 */
+ : create index idx_t_a on t(a);
+ :
+(1 row)
+
+postgres=>
-\r
-create view select_index_advisory as\r
-select E'backend_pid\n'\r
- || E'===========\n'\r
- || backend_pid,\r
- show_index_advisory( backend_pid )\r
-from (select distinct backend_pid\r
- from index_advisory as adv\r
- /* do not consider tables that no longer exist */\r
- where exists (select oid\r
- from pg_class\r
- where oid = adv.reloid)\r
- ) as v;\r
+
+create or replace view select_index_advisory as
+select E'backend_pid\n'
+ || E'===========\n'
+ || backend_pid,
+ show_index_advisory( backend_pid )
+from (select distinct backend_pid
+ from index_advisory as adv
+ /* do not consider tables that no longer exist */
+ where exists (select oid
+ from pg_class
+ where oid = adv.reloid)
+ ) as v;
-\r
-create function show_index_advisory(p_backend_pid index_advisory.backend_pid%type) returns text\r
-as\r
-$$\r
-declare\r
- pid p_backend_pid%type;\r
- q_advice text;\r
- r_advice record;\r
- q_column text;\r
- r_column record;\r
- ret text;\r
-\r
- NAMEDATALEN int := 64;\r
-\r
- collist_w_C text; /* Column name list with commas */\r
- collist_w_U text; /* Column name list with underscores */\r
- colidlist_w_U text; /* Column id list with underscores */\r
-begin\r
- if p_backend_pid is null then\r
- pid = pg_backend_pid();\r
- else\r
- pid = p_backend_pid;\r
- end if;\r
-\r
- ret := '/* Index Adviser */' || E'\n' ||\r
- '/* ============= */' || E'\n';\r
-\r
- q_advice := 'SELECT c.relname,\r
- c.oid as reloid,\r
- a.attrs AS colids,\r
- MAX( a.index_size ) AS size_in_KB,\r
- SUM( a.profit ) AS benefit,\r
- SUM( a.profit )/MAX( a.index_size ) AS gain\r
- FROM index_advisory a,\r
- pg_class c\r
- WHERE a.backend_pid = ' || pid || '\r
- AND a.reloid = c.oid\r
- GROUP BY c.relname, c.oid, a.attrs\r
- ORDER BY gain\r
- DESC';\r
- \r
- for r_advice in execute q_advice loop\r
-\r
- ret := ret ||\r
- E'\n/* size: ' || r_advice.size_in_KB || ' KB, '\r
- || 'benefit: ' || r_advice.benefit || ', '\r
- || 'gain: ' || r_advice.gain || E' */\n';\r
-\r
- collist_w_C := '';\r
- collist_w_U := '';\r
- colidlist_w_U := '';\r
-\r
- for i in array_lower( r_advice.colids, 1 )\r
- .. array_upper( r_advice.colids, 1 )\r
- loop\r
-\r
- q_column := 'SELECT a.attname as name,\r
- a.attnum as id\r
- FROM pg_class c,\r
- pg_attribute a\r
- WHERE c.oid = ' || r_advice.reloid || '\r
- AND a.attrelid = c.oid\r
- AND a.attnum = ' || r_advice.colids[i] || '\r
- ';\r
-\r
- execute q_column into r_column;\r
-\r
--- if ROW_COUNT > 1 then\r
--- raise EXCEPTION 'an internal query failed';\r
--- end if;\r
-\r
- if i <> 1 then\r
- collist_w_C := collist_w_C || ', ';\r
- collist_w_U := collist_w_U || '_';\r
- colidlist_w_U := colidlist_w_U || '_';\r
- end if;\r
-\r
- collist_w_C := collist_w_C || r_column.name;\r
- collist_w_U := collist_w_U || r_column.name;\r
- colidlist_w_U := colidlist_w_U || r_column.id;\r
-\r
- end loop;\r
-\r
- ret := ret || 'create index ';\r
-\r
- if (length('idx_' || r_advice.relname || '_' || collist_w_U)\r
- <= NAMEDATALEN)\r
- then\r
- ret := ret || 'idx_' || r_advice.relname || '_' || collist_w_U;\r
- else\r
- ret := ret || 'idx_' || r_advice.reloid || '_' || colidlist_w_U;\r
- end if;\r
-\r
- ret := ret || ' on ' || r_advice.relname || '(' || collist_w_C || E');\n';\r
-\r
- end loop;\r
-\r
- return ret;\r
-end;\r
-$$ language plpgsql;\r
+
+create or replace function show_index_advisory() returns text as $$
+ select show_index_advisory(null);
+$$ language sql;
+
+create or replace function show_index_advisory(p_backend_pid index_advisory.backend_pid%type) returns text as $$
+declare
+ pid p_backend_pid%type;
+ q_advice text;
+ r_advice record;
+ q_column text;
+ r_column record;
+ ret text;
+
+ NAMEDATALEN int := 64;
+
+ collist_w_C text; /* Column name list with commas */
+ collist_w_U text; /* Column name list with underscores */
+ colidlist_w_U text; /* Column id list with underscores */
+begin
+ if p_backend_pid is null then
+ pid = pg_backend_pid();
+ else
+ pid = p_backend_pid;
+ end if;
+
+ ret := '/* Index Adviser */' || E'\n' ||
+ '/* ============= */' || E'\n';
+
+ q_advice := 'SELECT c.relname,
+ c.oid as reloid,
+ a.attrs AS colids,
+ MAX( a.index_size ) AS size_in_KB,
+ SUM( a.profit ) AS benefit,
+ SUM( a.profit )/MAX( a.index_size ) AS gain
+ FROM index_advisory a,
+ pg_class c
+ WHERE a.backend_pid = ' || pid || '
+ AND a.reloid = c.oid
+ GROUP BY c.relname, c.oid, a.attrs
+ ORDER BY gain
+ DESC';
+
+ for r_advice in execute q_advice loop
+
+ ret := ret ||
+ E'\n/* size: ' || r_advice.size_in_KB || ' KB, '
+ || 'benefit: ' || r_advice.benefit || ', '
+ || 'gain: ' || r_advice.gain || E' */\n';
+
+ collist_w_C := '';
+ collist_w_U := '';
+ colidlist_w_U := '';
+
+ for i in array_lower( r_advice.colids, 1 )
+ .. array_upper( r_advice.colids, 1 )
+ loop
+
+ q_column := 'SELECT a.attname as name,
+ a.attnum as id
+ FROM pg_class c,
+ pg_attribute a
+ WHERE c.oid = ' || r_advice.reloid || '
+ AND a.attrelid = c.oid
+ AND a.attnum = ' || r_advice.colids[i] || '
+ ';
+
+ execute q_column into r_column;
+
+-- if ROW_COUNT > 1 then
+-- raise EXCEPTION 'an internal query failed';
+-- end if;
+
+ if i <> 1 then
+ collist_w_C := collist_w_C || ', ';
+ collist_w_U := collist_w_U || '_';
+ colidlist_w_U := colidlist_w_U || '_';
+ end if;
+
+ collist_w_C := collist_w_C || r_column.name;
+ collist_w_U := collist_w_U || r_column.name;
+ colidlist_w_U := colidlist_w_U || r_column.id;
+
+ end loop;
+
+ ret := ret || 'create index ';
+
+ if (length('idx_' || r_advice.relname || '_' || collist_w_U)
+ <= NAMEDATALEN)
+ then
+ ret := ret || 'idx_' || r_advice.relname || '_' || collist_w_U;
+ else
+ ret := ret || 'idx_' || r_advice.reloid || '_' || colidlist_w_U;
+ end if;
+
+ ret := ret || ' on ' || r_advice.relname || '(' || collist_w_C || E');\n';
+
+ end loop;
+
+ return ret;
+end;
+$$ language plpgsql;
projects / pg_adviser.git / commitdiff