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Add support for temporary views, including documentation and regression

tests. Contributed by Koju Iijima, review from Neil Conway, Gavin Sherry
and Tom Lane.

Also, fix error in description of WITH CHECK OPTION clause in the CREATE
VIEW reference page: it should be "CASCADED", not "CASCADE".
This commit is contained in:
Neil Conway
2005-02-02 06:36:02 +00:00
parent f94197ef35
commit 73f630500b
7 changed files with 508 additions and 30 deletions

View File

@@ -60,3 +60,249 @@ CREATE OR REPLACE VIEW viewtest AS
ERROR: cannot change data type of view column "b"
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 may not specify a schema name
-- should fail
CREATE SCHEMA test_schema
CREATE TEMP VIEW testview AS SELECT 1;
ERROR: temporary tables may not 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;
CREATE VIEW v13_temp AS SELECT seq1_temp.is_called;
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 view temp_view_test.v9
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v9
NOTICE: drop cascades to sequence temp_view_test.seq1
NOTICE: drop cascades to view temp_view_test.v8
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v8
NOTICE: drop cascades to view temp_view_test.v7
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v7
NOTICE: drop cascades to view temp_view_test.v6
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v6
NOTICE: drop cascades to view temp_view_test.v5
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v5
NOTICE: drop cascades to view temp_view_test.v4
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v4
NOTICE: drop cascades to view temp_view_test.v3
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v3
NOTICE: drop cascades to view temp_view_test.v2
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v2
NOTICE: drop cascades to view temp_view_test.v1
NOTICE: drop cascades to rule _RETURN on view temp_view_test.v1
NOTICE: drop cascades to table temp_view_test.base_table2
NOTICE: drop cascades to rule _RETURN on view v5_temp
NOTICE: drop cascades to view v5_temp
NOTICE: drop cascades to table temp_view_test.base_table
NOTICE: drop cascades to rule _RETURN on view v9_temp
NOTICE: drop cascades to view v9_temp
NOTICE: drop cascades to rule _RETURN on view v8_temp
NOTICE: drop cascades to view v8_temp
NOTICE: drop cascades to rule _RETURN on view v6_temp
NOTICE: drop cascades to view v6_temp
NOTICE: drop cascades to rule _RETURN on view v4_temp
NOTICE: drop cascades to view v4_temp
NOTICE: drop cascades to rule _RETURN on view v2_temp
NOTICE: drop cascades to view v2_temp
NOTICE: drop cascades to rule _RETURN on view v11_temp
NOTICE: drop cascades to view v11_temp
NOTICE: drop cascades to rule _RETURN on view v12_temp
NOTICE: drop cascades to view v12_temp
NOTICE: drop cascades to rule _RETURN on view v7_temp
NOTICE: drop cascades to view v7_temp
NOTICE: drop cascades to rule _RETURN on view v10_temp
NOTICE: drop cascades to view v10_temp
DROP SCHEMA testviewschm2 CASCADE;
NOTICE: drop cascades to view pubview
NOTICE: drop cascades to rule _RETURN on view pubview
NOTICE: drop cascades to table tbl4
NOTICE: drop cascades to rule _RETURN on view mytempview
NOTICE: drop cascades to view mytempview
NOTICE: drop cascades to table tbl3
NOTICE: drop cascades to table tbl2
NOTICE: drop cascades to table tbl1
NOTICE: drop cascades to view nontemp4
NOTICE: drop cascades to rule _RETURN on view nontemp4
NOTICE: drop cascades to view nontemp3
NOTICE: drop cascades to rule _RETURN on view nontemp3
NOTICE: drop cascades to view nontemp2
NOTICE: drop cascades to rule _RETURN on view nontemp2
NOTICE: drop cascades to view nontemp1
NOTICE: drop cascades to rule _RETURN on view nontemp1
NOTICE: drop cascades to table t2
NOTICE: drop cascades to table t1
NOTICE: drop cascades to rule _RETURN on view temporal4
NOTICE: drop cascades to view temporal4
NOTICE: drop cascades to rule _RETURN on view temporal3
NOTICE: drop cascades to view temporal3
NOTICE: drop cascades to rule _RETURN on view temporal2
NOTICE: drop cascades to view temporal2
NOTICE: drop cascades to rule _RETURN on view temporal1
NOTICE: drop cascades to view temporal1
SET search_path to public;

View File

@@ -63,3 +63,131 @@ CREATE OR REPLACE VIEW viewtest AS
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;
-- 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;
-- should fail
CREATE SCHEMA test_schema
CREATE TEMP VIEW testview AS SELECT 1;
-- 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;
-- 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;
-- 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);
CREATE VIEW v7_temp AS SELECT t1.id, t2.a FROM base_table t1, (SELECT * FROM temp_table) t2;
CREATE VIEW v8_temp AS SELECT * FROM base_table WHERE EXISTS (SELECT 1 FROM temp_table);
CREATE VIEW v9_temp AS SELECT * FROM base_table WHERE NOT EXISTS (SELECT 1 FROM temp_table);
-- a view should also be temporary if it references a temporary view
CREATE VIEW v10_temp AS SELECT * FROM v7_temp;
CREATE VIEW v11_temp AS SELECT t1.id, t2.a FROM base_table t1, v10_temp t2;
CREATE VIEW v12_temp AS SELECT true FROM v11_temp;
-- 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;
CREATE VIEW v13_temp AS SELECT seq1_temp.is_called;
SELECT relname FROM pg_class
WHERE relname LIKE 'v_'
AND relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = 'temp_view_test')
ORDER BY relname;
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;
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;
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;
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;
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';
SELECT relname FROM pg_class
WHERE relname LIKE 'nontemp%'
AND relnamespace = (SELECT oid FROM pg_namespace WHERE nspname = 'testviewschm2')
ORDER BY relname;
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;
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');
--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);
SELECT count(*) FROM pg_class where relname LIKE 'mytempview'
And relnamespace IN (SELECT OID FROM pg_namespace WHERE nspname LIKE 'pg_temp%');
DROP SCHEMA temp_view_test CASCADE;
DROP SCHEMA testviewschm2 CASCADE;
SET search_path to public;