--
-- CREATE_VIEW
-- Virtual class definitions
--	(this also tests the query rewrite system)
--
CREATE VIEW street AS
   SELECT r.name, r.thepath, c.cname AS cname 
   FROM ONLY road r, real_city c
   WHERE c.outline ## r.thepath;
CREATE VIEW iexit AS
   SELECT ih.name, ih.thepath, 
	interpt_pp(ih.thepath, r.thepath) AS exit
   FROM ihighway ih, ramp r
   WHERE ih.thepath ## r.thepath;
CREATE VIEW toyemp AS
   SELECT name, age, location, 12*salary AS annualsal
   FROM emp;
-- Test comments
COMMENT ON VIEW noview IS 'no view';
ERROR:  relation "noview" does not exist
COMMENT ON VIEW toyemp IS 'is a view';
COMMENT ON VIEW toyemp IS NULL;
--
-- CREATE OR REPLACE VIEW
--
CREATE TABLE viewtest_tbl (a int, b int);
COPY viewtest_tbl FROM stdin;
CREATE OR REPLACE VIEW viewtest AS
	SELECT * FROM viewtest_tbl;
CREATE OR REPLACE VIEW viewtest AS
	SELECT * FROM viewtest_tbl WHERE a > 10;
SELECT * FROM viewtest;
 a  | b  
----+----
 15 | 20
 20 | 25
(2 rows)

CREATE OR REPLACE VIEW viewtest AS
	SELECT a, b FROM viewtest_tbl WHERE a > 5 ORDER BY b DESC;
SELECT * FROM viewtest;
 a  | b  
----+----
 20 | 25
 15 | 20
 10 | 15
(3 rows)

-- should fail
CREATE OR REPLACE VIEW viewtest AS
	SELECT a FROM viewtest_tbl WHERE a <> 20;
ERROR:  cannot drop columns from view
-- should fail
CREATE OR REPLACE VIEW viewtest AS
	SELECT 1, * FROM viewtest_tbl;
ERROR:  cannot change name of view column "a" to "?column?"
-- should fail
CREATE OR REPLACE VIEW viewtest AS
	SELECT a, b::numeric FROM viewtest_tbl;
ERROR:  cannot change data type of view column "b" from integer to numeric
-- should work 
CREATE OR REPLACE VIEW viewtest AS
	SELECT a, b, 0 AS c FROM viewtest_tbl;
DROP VIEW viewtest;
DROP TABLE viewtest_tbl;
-- tests for temporary views
CREATE SCHEMA temp_view_test
    CREATE TABLE base_table (a int, id int)
    CREATE TABLE base_table2 (a int, id int);
SET search_path TO temp_view_test, public;
CREATE TEMPORARY TABLE temp_table (a int, id int);
-- should be created in temp_view_test schema
CREATE VIEW v1 AS SELECT * FROM base_table;
-- should be created in temp object schema
CREATE VIEW v1_temp AS SELECT * FROM temp_table;
NOTICE:  view "v1_temp" will be a temporary view
-- should be created in temp object schema
CREATE TEMP VIEW v2_temp AS SELECT * FROM base_table;
-- should be created in temp_views schema
CREATE VIEW temp_view_test.v2 AS SELECT * FROM base_table;
-- should fail
CREATE VIEW temp_view_test.v3_temp AS SELECT * FROM temp_table;
NOTICE:  view "v3_temp" will be a temporary view
ERROR:  temporary tables cannot specify a schema name
-- should fail
CREATE SCHEMA test_schema
    CREATE TEMP VIEW testview AS SELECT 1;
ERROR:  temporary tables cannot specify a schema name
-- joins: if any of the join relations are temporary, the view
-- should also be temporary
-- should be non-temp
CREATE VIEW v3 AS
    SELECT t1.a AS t1_a, t2.a AS t2_a
    FROM base_table t1, base_table2 t2
    WHERE t1.id = t2.id;
-- should be temp (one join rel is temp)
CREATE VIEW v4_temp AS
    SELECT t1.a AS t1_a, t2.a AS t2_a
    FROM base_table t1, temp_table t2
    WHERE t1.id = t2.id;
NOTICE:  view "v4_temp" will be a temporary view
-- should be temp
CREATE VIEW v5_temp AS
    SELECT t1.a AS t1_a, t2.a AS t2_a, t3.a AS t3_a
    FROM base_table t1, base_table2 t2, temp_table t3
    WHERE t1.id = t2.id and t2.id = t3.id;
NOTICE:  view "v5_temp" will be a temporary view
-- subqueries
CREATE VIEW v4 AS SELECT * FROM base_table WHERE id IN (SELECT id FROM base_table2);
CREATE VIEW v5 AS SELECT t1.id, t2.a FROM base_table t1, (SELECT * FROM base_table2) t2;
CREATE VIEW v6 AS SELECT * FROM base_table WHERE EXISTS (SELECT 1 FROM base_table2);
CREATE VIEW v7 AS SELECT * FROM base_table WHERE NOT EXISTS (SELECT 1 FROM base_table2);
CREATE VIEW v8 AS SELECT * FROM base_table WHERE EXISTS (SELECT 1);
CREATE VIEW v6_temp AS SELECT * FROM base_table WHERE id IN (SELECT id FROM temp_table);
NOTICE:  view "v6_temp" will be a temporary view
CREATE VIEW v7_temp AS SELECT t1.id, t2.a FROM base_table t1, (SELECT * FROM temp_table) t2;
NOTICE:  view "v7_temp" will be a temporary view
CREATE VIEW v8_temp AS SELECT * FROM base_table WHERE EXISTS (SELECT 1 FROM temp_table);
NOTICE:  view "v8_temp" will be a temporary view
CREATE VIEW v9_temp AS SELECT * FROM base_table WHERE NOT EXISTS (SELECT 1 FROM temp_table);
NOTICE:  view "v9_temp" will be a temporary view
-- a view should also be temporary if it references a temporary view
CREATE VIEW v10_temp AS SELECT * FROM v7_temp;
NOTICE:  view "v10_temp" will be a temporary view
CREATE VIEW v11_temp AS SELECT t1.id, t2.a FROM base_table t1, v10_temp t2;
NOTICE:  view "v11_temp" will be a temporary view
CREATE VIEW v12_temp AS SELECT true FROM v11_temp;
NOTICE:  view "v12_temp" will be a temporary view
-- a view should also be temporary if it references a temporary sequence
CREATE SEQUENCE seq1;
CREATE TEMPORARY SEQUENCE seq1_temp;
CREATE VIEW v9 AS SELECT seq1.is_called FROM seq1;
CREATE VIEW v13_temp AS SELECT seq1_temp.is_called FROM seq1_temp;
NOTICE:  view "v13_temp" will be a temporary view
SELECT relname FROM pg_class
    WHERE relname LIKE 'v_'  
    AND relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = 'temp_view_test')
    ORDER BY relname;
 relname 
---------
 v1
 v2
 v3
 v4
 v5
 v6
 v7
 v8
 v9
(9 rows)

SELECT relname FROM pg_class
    WHERE relname LIKE 'v%' 
    AND relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname LIKE 'pg_temp%')
    ORDER BY relname;
 relname  
----------
 v10_temp
 v11_temp
 v12_temp
 v13_temp
 v1_temp
 v2_temp
 v4_temp
 v5_temp
 v6_temp
 v7_temp
 v8_temp
 v9_temp
(12 rows)

CREATE SCHEMA testviewschm2;
SET search_path TO testviewschm2, public;
CREATE TABLE t1 (num int, name text);
CREATE TABLE t2 (num2 int, value text);
CREATE TEMP TABLE tt (num2 int, value text);
CREATE VIEW nontemp1 AS SELECT * FROM t1 CROSS JOIN t2;
CREATE VIEW temporal1 AS SELECT * FROM t1 CROSS JOIN tt;
NOTICE:  view "temporal1" will be a temporary view
CREATE VIEW nontemp2 AS SELECT * FROM t1 INNER JOIN t2 ON t1.num = t2.num2;
CREATE VIEW temporal2 AS SELECT * FROM t1 INNER JOIN tt ON t1.num = tt.num2;
NOTICE:  view "temporal2" will be a temporary view
CREATE VIEW nontemp3 AS SELECT * FROM t1 LEFT JOIN t2 ON t1.num = t2.num2;
CREATE VIEW temporal3 AS SELECT * FROM t1 LEFT JOIN tt ON t1.num = tt.num2;
NOTICE:  view "temporal3" will be a temporary view
CREATE VIEW nontemp4 AS SELECT * FROM t1 LEFT JOIN t2 ON t1.num = t2.num2 AND t2.value = 'xxx';
CREATE VIEW temporal4 AS SELECT * FROM t1 LEFT JOIN tt ON t1.num = tt.num2 AND tt.value = 'xxx';
NOTICE:  view "temporal4" will be a temporary view
SELECT relname FROM pg_class
    WHERE relname LIKE 'nontemp%'
    AND relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = 'testviewschm2')
    ORDER BY relname;
 relname  
----------
 nontemp1
 nontemp2
 nontemp3
 nontemp4
(4 rows)

SELECT relname FROM pg_class
    WHERE relname LIKE 'temporal%' 
    AND relnamespace IN (SELECT oid FROM pg_namespace WHERE nspname LIKE 'pg_temp%')
    ORDER BY relname;
  relname  
-----------
 temporal1
 temporal2
 temporal3
 temporal4
(4 rows)

CREATE TABLE tbl1 ( a int, b int);
CREATE TABLE tbl2 (c int, d int);
CREATE TABLE tbl3 (e int, f int);
CREATE TABLE tbl4 (g int, h int);
CREATE TEMP TABLE tmptbl (i int, j int);
--Should be in testviewschm2
CREATE   VIEW  pubview AS SELECT * FROM tbl1 WHERE tbl1.a
BETWEEN (SELECT d FROM tbl2 WHERE c = 1) AND (SELECT e FROM tbl3 WHERE f = 2)
AND EXISTS (SELECT g FROM tbl4 LEFT JOIN tbl3 ON tbl4.h = tbl3.f);
SELECT count(*) FROM pg_class where relname = 'pubview'
AND relnamespace IN (SELECT OID FROM pg_namespace WHERE nspname = 'testviewschm2');
 count 
-------
     1
(1 row)

--Should be in temp object schema
CREATE   VIEW  mytempview AS SELECT * FROM tbl1 WHERE tbl1.a
BETWEEN (SELECT d FROM tbl2 WHERE c = 1) AND (SELECT e FROM tbl3 WHERE f = 2)
AND EXISTS (SELECT g FROM tbl4 LEFT JOIN tbl3 ON tbl4.h = tbl3.f)
AND NOT EXISTS (SELECT g FROM tbl4 LEFT JOIN tmptbl ON tbl4.h = tmptbl.j);
NOTICE:  view "mytempview" will be a temporary view
SELECT count(*) FROM pg_class where relname LIKE 'mytempview'
And relnamespace IN (SELECT OID FROM pg_namespace WHERE nspname LIKE 'pg_temp%');
 count 
-------
     1
(1 row)

DROP SCHEMA temp_view_test CASCADE;
NOTICE:  drop cascades to 22 other objects
DETAIL:  drop cascades to table temp_view_test.base_table
drop cascades to view v7_temp
drop cascades to view v10_temp
drop cascades to view v11_temp
drop cascades to view v12_temp
drop cascades to view v2_temp
drop cascades to view v4_temp
drop cascades to view v6_temp
drop cascades to view v8_temp
drop cascades to view v9_temp
drop cascades to table temp_view_test.base_table2
drop cascades to view v5_temp
drop cascades to view temp_view_test.v1
drop cascades to view temp_view_test.v2
drop cascades to view temp_view_test.v3
drop cascades to view temp_view_test.v4
drop cascades to view temp_view_test.v5
drop cascades to view temp_view_test.v6
drop cascades to view temp_view_test.v7
drop cascades to view temp_view_test.v8
drop cascades to sequence temp_view_test.seq1
drop cascades to view temp_view_test.v9
DROP SCHEMA testviewschm2 CASCADE;
NOTICE:  drop cascades to 16 other objects
DETAIL:  drop cascades to table t1
drop cascades to view temporal1
drop cascades to view temporal2
drop cascades to view temporal3
drop cascades to view temporal4
drop cascades to table t2
drop cascades to view nontemp1
drop cascades to view nontemp2
drop cascades to view nontemp3
drop cascades to view nontemp4
drop cascades to table tbl1
drop cascades to table tbl2
drop cascades to table tbl3
drop cascades to table tbl4
drop cascades to view mytempview
drop cascades to view pubview
SET search_path to public;
