215 lines
7.3 KiB
PL/PgSQL
215 lines
7.3 KiB
PL/PgSQL
--
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-- Create access method tests
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--
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-- Make gist2 over gisthandler. In fact, it would be a synonym to gist.
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CREATE ACCESS METHOD gist2 TYPE INDEX HANDLER gisthandler;
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-- Verify return type checks for handlers
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CREATE ACCESS METHOD bogus TYPE INDEX HANDLER int4in;
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CREATE ACCESS METHOD bogus TYPE INDEX HANDLER heap_tableam_handler;
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-- Try to create gist2 index on fast_emp4000: fail because opclass doesn't exist
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CREATE INDEX grect2ind2 ON fast_emp4000 USING gist2 (home_base);
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-- Make operator class for boxes using gist2
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CREATE OPERATOR CLASS box_ops DEFAULT
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FOR TYPE box USING gist2 AS
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OPERATOR 1 <<,
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OPERATOR 2 &<,
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OPERATOR 3 &&,
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OPERATOR 4 &>,
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OPERATOR 5 >>,
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OPERATOR 6 ~=,
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OPERATOR 7 @>,
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OPERATOR 8 <@,
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OPERATOR 9 &<|,
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OPERATOR 10 <<|,
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OPERATOR 11 |>>,
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OPERATOR 12 |&>,
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FUNCTION 1 gist_box_consistent(internal, box, smallint, oid, internal),
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FUNCTION 2 gist_box_union(internal, internal),
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-- don't need compress, decompress, or fetch functions
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FUNCTION 5 gist_box_penalty(internal, internal, internal),
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FUNCTION 6 gist_box_picksplit(internal, internal),
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FUNCTION 7 gist_box_same(box, box, internal);
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-- Create gist2 index on fast_emp4000
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CREATE INDEX grect2ind2 ON fast_emp4000 USING gist2 (home_base);
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-- Now check the results from plain indexscan; temporarily drop existing
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-- index grect2ind to ensure it doesn't capture the plan
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BEGIN;
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DROP INDEX grect2ind;
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SET enable_seqscan = OFF;
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SET enable_indexscan = ON;
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SET enable_bitmapscan = OFF;
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EXPLAIN (COSTS OFF)
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SELECT * FROM fast_emp4000
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WHERE home_base <@ '(200,200),(2000,1000)'::box
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ORDER BY (home_base[0])[0];
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SELECT * FROM fast_emp4000
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WHERE home_base <@ '(200,200),(2000,1000)'::box
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ORDER BY (home_base[0])[0];
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM fast_emp4000 WHERE home_base && '(1000,1000,0,0)'::box;
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SELECT count(*) FROM fast_emp4000 WHERE home_base && '(1000,1000,0,0)'::box;
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EXPLAIN (COSTS OFF)
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SELECT count(*) FROM fast_emp4000 WHERE home_base IS NULL;
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SELECT count(*) FROM fast_emp4000 WHERE home_base IS NULL;
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ROLLBACK;
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-- Try to drop access method: fail because of dependent objects
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DROP ACCESS METHOD gist2;
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-- Drop access method cascade
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-- To prevent a (rare) deadlock against autovacuum,
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-- we must lock the table that owns the index that will be dropped
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BEGIN;
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LOCK TABLE fast_emp4000;
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DROP ACCESS METHOD gist2 CASCADE;
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COMMIT;
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--
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-- Test table access methods
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--
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-- prevent empty values
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SET default_table_access_method = '';
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-- prevent nonexistent values
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SET default_table_access_method = 'I do not exist AM';
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-- prevent setting it to an index AM
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SET default_table_access_method = 'btree';
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-- Create a heap2 table am handler with heapam handler
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CREATE ACCESS METHOD heap2 TYPE TABLE HANDLER heap_tableam_handler;
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-- Verify return type checks for handlers
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CREATE ACCESS METHOD bogus TYPE TABLE HANDLER int4in;
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CREATE ACCESS METHOD bogus TYPE TABLE HANDLER bthandler;
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SELECT amname, amhandler, amtype FROM pg_am where amtype = 't' ORDER BY 1, 2;
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-- First create tables employing the new AM using USING
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-- plain CREATE TABLE
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CREATE TABLE tableam_tbl_heap2(f1 int) USING heap2;
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INSERT INTO tableam_tbl_heap2 VALUES(1);
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SELECT f1 FROM tableam_tbl_heap2 ORDER BY f1;
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-- CREATE TABLE AS
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CREATE TABLE tableam_tblas_heap2 USING heap2 AS SELECT * FROM tableam_tbl_heap2;
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SELECT f1 FROM tableam_tbl_heap2 ORDER BY f1;
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-- SELECT INTO doesn't support USING
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SELECT INTO tableam_tblselectinto_heap2 USING heap2 FROM tableam_tbl_heap2;
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-- CREATE VIEW doesn't support USING
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CREATE VIEW tableam_view_heap2 USING heap2 AS SELECT * FROM tableam_tbl_heap2;
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-- CREATE SEQUENCE doesn't support USING
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CREATE SEQUENCE tableam_seq_heap2 USING heap2;
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-- CREATE MATERIALIZED VIEW does support USING
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CREATE MATERIALIZED VIEW tableam_tblmv_heap2 USING heap2 AS SELECT * FROM tableam_tbl_heap2;
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SELECT f1 FROM tableam_tblmv_heap2 ORDER BY f1;
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-- CREATE TABLE .. PARTITION BY doesn't not support USING
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CREATE TABLE tableam_parted_heap2 (a text, b int) PARTITION BY list (a) USING heap2;
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CREATE TABLE tableam_parted_heap2 (a text, b int) PARTITION BY list (a);
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-- new partitions will inherit from the current default, rather the partition root
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SET default_table_access_method = 'heap';
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CREATE TABLE tableam_parted_a_heap2 PARTITION OF tableam_parted_heap2 FOR VALUES IN ('a');
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SET default_table_access_method = 'heap2';
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CREATE TABLE tableam_parted_b_heap2 PARTITION OF tableam_parted_heap2 FOR VALUES IN ('b');
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RESET default_table_access_method;
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-- but the method can be explicitly specified
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CREATE TABLE tableam_parted_c_heap2 PARTITION OF tableam_parted_heap2 FOR VALUES IN ('c') USING heap;
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CREATE TABLE tableam_parted_d_heap2 PARTITION OF tableam_parted_heap2 FOR VALUES IN ('d') USING heap2;
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-- List all objects in AM
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SELECT
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pc.relkind,
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pa.amname,
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CASE WHEN relkind = 't' THEN
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(SELECT 'toast for ' || relname::regclass FROM pg_class pcm WHERE pcm.reltoastrelid = pc.oid)
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ELSE
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relname::regclass::text
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END COLLATE "C" AS relname
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FROM pg_class AS pc,
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pg_am AS pa
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WHERE pa.oid = pc.relam
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AND pa.amname = 'heap2'
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ORDER BY 3, 1, 2;
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-- Show dependencies onto AM - there shouldn't be any for toast
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SELECT pg_describe_object(classid,objid,objsubid) AS obj
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FROM pg_depend, pg_am
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WHERE pg_depend.refclassid = 'pg_am'::regclass
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AND pg_am.oid = pg_depend.refobjid
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AND pg_am.amname = 'heap2'
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ORDER BY classid, objid, objsubid;
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-- Second, create objects in the new AM by changing the default AM
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BEGIN;
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SET LOCAL default_table_access_method = 'heap2';
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-- following tests should all respect the default AM
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CREATE TABLE tableam_tbl_heapx(f1 int);
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CREATE TABLE tableam_tblas_heapx AS SELECT * FROM tableam_tbl_heapx;
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SELECT INTO tableam_tblselectinto_heapx FROM tableam_tbl_heapx;
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CREATE MATERIALIZED VIEW tableam_tblmv_heapx USING heap2 AS SELECT * FROM tableam_tbl_heapx;
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CREATE TABLE tableam_parted_heapx (a text, b int) PARTITION BY list (a);
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CREATE TABLE tableam_parted_1_heapx PARTITION OF tableam_parted_heapx FOR VALUES IN ('a', 'b');
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-- but an explicitly set AM overrides it
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CREATE TABLE tableam_parted_2_heapx PARTITION OF tableam_parted_heapx FOR VALUES IN ('c', 'd') USING heap;
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-- sequences, views and foreign servers shouldn't have an AM
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CREATE VIEW tableam_view_heapx AS SELECT * FROM tableam_tbl_heapx;
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CREATE SEQUENCE tableam_seq_heapx;
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CREATE FOREIGN DATA WRAPPER fdw_heap2 VALIDATOR postgresql_fdw_validator;
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CREATE SERVER fs_heap2 FOREIGN DATA WRAPPER fdw_heap2 ;
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CREATE FOREIGN table tableam_fdw_heapx () SERVER fs_heap2;
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-- Verify that new AM was used for tables, matviews, but not for sequences, views and fdws
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SELECT
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pc.relkind,
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pa.amname,
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CASE WHEN relkind = 't' THEN
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(SELECT 'toast for ' || relname::regclass FROM pg_class pcm WHERE pcm.reltoastrelid = pc.oid)
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ELSE
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relname::regclass::text
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END COLLATE "C" AS relname
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FROM pg_class AS pc
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LEFT JOIN pg_am AS pa ON (pa.oid = pc.relam)
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WHERE pc.relname LIKE 'tableam_%_heapx'
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ORDER BY 3, 1, 2;
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-- don't want to keep those tables, nor the default
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ROLLBACK;
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-- Third, check that we can neither create a table using a nonexistent
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-- AM, nor using an index AM
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CREATE TABLE i_am_a_failure() USING "";
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CREATE TABLE i_am_a_failure() USING i_do_not_exist_am;
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CREATE TABLE i_am_a_failure() USING "I do not exist AM";
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CREATE TABLE i_am_a_failure() USING "btree";
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-- Drop table access method, which fails as objects depends on it
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DROP ACCESS METHOD heap2;
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-- we intentionally leave the objects created above alive, to verify pg_dump support
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