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https://github.com/GreptimeTeam/greptimedb.git
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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>
65 lines
1.3 KiB
SQL
65 lines
1.3 KiB
SQL
CREATE DATABASE schema_for_view_test;
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USE schema_for_view_test;
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CREATE TABLE t1 (n INT, ts TIMESTAMP TIME INDEX);
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INSERT INTO t1 VALUES (1, 1), (2, 2), (3, 3), (4, 4), (5, 5), (6, 6), (7, 7), (8, 8), (9, 9), (10, 10);
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CREATE VIEW IF NOT EXISTS v1 (a) AS SELECT * FROM t1;
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CREATE VIEW IF NOT EXISTS v1 (a) AS SELECT n FROM t1;
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SHOW CREATE VIEW v1;
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SELECT * FROM v1;
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SELECT a FROM v1;
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SELECT n FROM v1;
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CREATE OR REPLACE VIEW v1 (a, b) AS SELECT n, n+1 FROM t1;
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SHOW CREATE VIEW v1;
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SELECT * FROM v1;
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SELECT * FROM v1 WHERE a > 5;
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SELECT * FROM v1 WHERE b > 5;
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SELECT a FROM v1;
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SELECT b FROM v1;
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SELECT a,b FROM v1;
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SELECT n FROM v1;
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SELECT * FROM v1 WHERE n > 5;
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-- test view after altering table t1 --
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CREATE OR REPLACE VIEW v1 AS SELECT n, ts FROM t1 LIMIT 5;
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SELECT * FROM v1;
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ALTER TABLE t1 ADD COLUMN s STRING DEFAULT '';
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SELECT * FROM v1;
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ALTER TABLE t1 DROP COLUMN n;
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-- FIXME(dennis): The result looks weird,
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-- Looks like substrait referes to columns only by their relative indices, so that’s name-independent.
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-- Limit: skip=0, fetch=5
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-- Projection: greptime.public.t1.ts, greptime.public.t1.s
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-- MergeScan [is_placeholder=false]
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-- Limit: skip=0, fetch=5
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-- MergeScan [is_placeholder=false]
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-- See https://github.com/apache/datafusion/issues/6489
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SELECT * FROM v1;
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USE public;
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DROP DATABASE schema_for_view_test;
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