mirror of
https://github.com/GreptimeTeam/greptimedb.git
synced 2026-01-06 13:22:57 +00:00
33ed745049
* feat: parse column names when creating view * feat: save the view definition into view info * feat: supports view columns and show create view * feat: save plan columns for validation * fix: typo * chore: comments and style * chore: apply suggestions * test: assert CreateView display result * chore: style Co-authored-by: Weny Xu <wenymedia@gmail.com> * chore: avoid the clone Co-authored-by: Weny Xu <wenymedia@gmail.com> * fix: compile error after rebeasing --------- Co-authored-by: Weny Xu <wenymedia@gmail.com>
137 lines
3.3 KiB
Plaintext
137 lines
3.3 KiB
Plaintext
CREATE DATABASE schema_for_view_test;
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Affected Rows: 1
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USE schema_for_view_test;
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Affected Rows: 0
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CREATE TABLE t1(a INT, b STRING, c TIMESTAMP TIME INDEX);
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Affected Rows: 0
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INSERT INTO t1 VALUES (41, "hello", 1), (42, "world", 2), (43, "greptime", 3);
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Affected Rows: 3
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CREATE VIEW v1 AS SELECT a, b FROM t1;
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Affected Rows: 0
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SELECT * FROM v1;
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+----+----------+
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| a | b |
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+----+----------+
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| 41 | hello |
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| 42 | world |
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| 43 | greptime |
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+----+----------+
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SELECT a FROM v1;
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+----+
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| a |
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+----+
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| 41 |
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| 42 |
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| 43 |
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+----+
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INSERT INTO t1 VALUES (44, "greptimedb", 4);
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Affected Rows: 1
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SELECT * FROM v1;
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+----+------------+
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| a | b |
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+----+------------+
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| 41 | hello |
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| 42 | world |
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| 43 | greptime |
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| 44 | greptimedb |
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+----+------------+
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SHOW CREATE VIEW v1;
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+------+---------------------------------------+
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| View | Create View |
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+------+---------------------------------------+
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| v1 | CREATE VIEW v1 AS SELECT a, b FROM t1 |
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+------+---------------------------------------+
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CREATE OR REPLACE VIEW v1 AS SELECT a, b, c FROM t1 WHERE a > 43;
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Affected Rows: 0
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SHOW CREATE VIEW v1;
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+------+------------------------------------------------------------------+
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| View | Create View |
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+------+------------------------------------------------------------------+
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| v1 | CREATE OR REPLACE VIEW v1 AS SELECT a, b, c FROM t1 WHERE a > 43 |
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+------+------------------------------------------------------------------+
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SELECT * FROM v1;
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+----+------------+-------------------------+
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| a | b | c |
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+----+------------+-------------------------+
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| 44 | greptimedb | 1970-01-01T00:00:00.004 |
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+----+------------+-------------------------+
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--- if not exists, so it doesn't change at all ---
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CREATE VIEW IF NOT EXISTS v1 AS SELECT c FROM t1;
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Affected Rows: 0
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SHOW CREATE VIEW v1;
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+------+------------------------------------------------------------------+
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| View | Create View |
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+------+------------------------------------------------------------------+
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| v1 | CREATE OR REPLACE VIEW v1 AS SELECT a, b, c FROM t1 WHERE a > 43 |
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+------+------------------------------------------------------------------+
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SELECT * FROM v1;
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+----+------------+-------------------------+
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| a | b | c |
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+----+------------+-------------------------+
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| 44 | greptimedb | 1970-01-01T00:00:00.004 |
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+----+------------+-------------------------+
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--- if not exists with replace, so it changes ---
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CREATE OR REPLACE VIEW IF NOT EXISTS v1 AS SELECT c FROM t1;
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Affected Rows: 0
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SHOW CREATE VIEW v1;
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+------+-------------------------------------------------------------+
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| View | Create View |
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+------+-------------------------------------------------------------+
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| v1 | CREATE OR REPLACE VIEW IF NOT EXISTS v1 AS SELECT c FROM t1 |
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+------+-------------------------------------------------------------+
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SELECT * FROM v1;
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+-------------------------+
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| c |
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+-------------------------+
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| 1970-01-01T00:00:00.001 |
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| 1970-01-01T00:00:00.002 |
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| 1970-01-01T00:00:00.003 |
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| 1970-01-01T00:00:00.004 |
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+-------------------------+
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USE public;
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Affected Rows: 0
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DROP DATABASE schema_for_view_test;
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Affected Rows: 0
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