mirror of
https://github.com/GreptimeTeam/greptimedb.git
synced 2026-01-08 22:32:55 +00:00
1f91422bae
* feat(mysql): add SHOW WARNINGS support and return warnings for unsupported SET variables Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * feat(function): add MySQL IF() function and PostgreSQL description functions for connector compatibility Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: show tables for mysql Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: partitions table in information_schema and add starrocks external catalog compatibility Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * refactor: async udf Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: set warnings Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * feat: impl pg_my_temp_schema and make description functions simple Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * test: add test for issue 7313 Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * feat: apply suggestions Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: partition_expression and partition_description Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: test Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com> Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: unit tests Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: saerch_path only works for pg Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * feat: improve warnings processing Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * fix: warnings while writing affected rows and refactor Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * chore: improve ShobjDescriptionFunction signature Signed-off-by: Dennis Zhuang <killme2008@gmail.com> * refactor: array_to_boolean Signed-off-by: Dennis Zhuang <killme2008@gmail.com> --------- Signed-off-by: Dennis Zhuang <killme2008@gmail.com> Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
230 lines
5.6 KiB
Plaintext
230 lines
5.6 KiB
Plaintext
CREATE TABLE t(a INTEGER, ts timestamp time index);
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Affected Rows: 0
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INSERT INTO t VALUES (1, 1), (null, 2), (3, 3);
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Affected Rows: 3
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SELECT ISNULL(a) from t;
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+-------------+
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| isnull(t.a) |
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+-------------+
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| false |
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| true |
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| false |
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+-------------+
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SELECT ISNULL(null);
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+--------------+
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| isnull(NULL) |
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+--------------+
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| true |
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+--------------+
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SELECT ISNULL(1);
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+------------------+
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| isnull(Int64(1)) |
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+------------------+
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| false |
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+------------------+
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SELECT ISNULL(-1);
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+-------------------+
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| isnull(Int64(-1)) |
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+-------------------+
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| false |
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+-------------------+
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SELECT ISNULL(1.0);
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+--------------------+
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| isnull(Float64(1)) |
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+--------------------+
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| false |
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+--------------------+
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SELECT ISNULL(true);
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+-----------------------+
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| isnull(Boolean(true)) |
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+-----------------------+
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| false |
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+-----------------------+
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SELECT ISNULL('string');
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+------------------------+
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| isnull(Utf8("string")) |
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+------------------------+
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| false |
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+------------------------+
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SELECT FIRST_VALUE(1);
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+-----------------------+
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| first_value(Int64(1)) |
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+-----------------------+
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| 1 |
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+-----------------------+
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SELECT FIRST_VALUE('a');
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+------------------------+
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| first_value(Utf8("a")) |
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+------------------------+
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| a |
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+------------------------+
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SELECT LAST_VALUE(1);
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+----------------------+
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| last_value(Int64(1)) |
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+----------------------+
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| 1 |
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+----------------------+
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SELECT LAST_VALUE('a');
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+-----------------------+
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| last_value(Utf8("a")) |
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+-----------------------+
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| a |
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+-----------------------+
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-- MySQL-compatible IF function tests
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SELECT IF(true, 'yes', 'no');
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+------------------------------------------+
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| if(Boolean(true),Utf8("yes"),Utf8("no")) |
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+------------------------------------------+
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| yes |
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+------------------------------------------+
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SELECT IF(false, 'yes', 'no');
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+-------------------------------------------+
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| if(Boolean(false),Utf8("yes"),Utf8("no")) |
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+-------------------------------------------+
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| no |
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+-------------------------------------------+
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SELECT IF(NULL, 'yes', 'no');
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+---------------------------------+
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| if(NULL,Utf8("yes"),Utf8("no")) |
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+---------------------------------+
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| no |
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+---------------------------------+
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SELECT IF(1, 'yes', 'no');
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+-------------------------------------+
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| if(Int64(1),Utf8("yes"),Utf8("no")) |
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+-------------------------------------+
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| yes |
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+-------------------------------------+
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SELECT IF(0, 'yes', 'no');
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+-------------------------------------+
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| if(Int64(0),Utf8("yes"),Utf8("no")) |
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+-------------------------------------+
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| no |
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+-------------------------------------+
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SELECT IF(-1, 'yes', 'no');
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+--------------------------------------+
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| if(Int64(-1),Utf8("yes"),Utf8("no")) |
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+--------------------------------------+
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| yes |
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+--------------------------------------+
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SELECT IF(1.5, 'yes', 'no');
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+-----------------------------------------+
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| if(Float64(1.5),Utf8("yes"),Utf8("no")) |
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+-----------------------------------------+
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| yes |
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+-----------------------------------------+
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SELECT IF(0.0, 'yes', 'no');
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+---------------------------------------+
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| if(Float64(0),Utf8("yes"),Utf8("no")) |
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+---------------------------------------+
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| no |
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+---------------------------------------+
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-- Test with table column
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SELECT IF(a > 1, 'greater', 'not greater') FROM t;
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+--------------------------------------------------------+
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| if(t.a > Int64(1),Utf8("greater"),Utf8("not greater")) |
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+--------------------------------------------------------+
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| not greater |
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| not greater |
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| greater |
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+--------------------------------------------------------+
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-- Test numeric return types
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SELECT IF(true, 100, 200);
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+-----------------------------------------+
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| if(Boolean(true),Int64(100),Int64(200)) |
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+-----------------------------------------+
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| 100 |
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+-----------------------------------------+
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SELECT IF(false, 100, 200);
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+------------------------------------------+
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| if(Boolean(false),Int64(100),Int64(200)) |
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+------------------------------------------+
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| 200 |
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+------------------------------------------+
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-- Test with IFNULL (should already work via DataFusion)
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SELECT IFNULL(NULL, 'default');
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+------------------------------+
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| ifnull(NULL,Utf8("default")) |
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+------------------------------+
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| default |
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+------------------------------+
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SELECT IFNULL('value', 'default');
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+---------------------------------------+
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| ifnull(Utf8("value"),Utf8("default")) |
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+---------------------------------------+
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| value |
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+---------------------------------------+
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-- Test COALESCE (should already work via DataFusion)
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SELECT COALESCE(NULL, NULL, 'third');
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+-----------------------------------+
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| coalesce(NULL,NULL,Utf8("third")) |
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+-----------------------------------+
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| third |
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+-----------------------------------+
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SELECT COALESCE('first', 'second');
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+----------------------------------------+
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| coalesce(Utf8("first"),Utf8("second")) |
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+----------------------------------------+
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| first |
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+----------------------------------------+
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DROP TABLE t;
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Affected Rows: 0
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