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read only does not protect this table #3895

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monetdb-team opened this issue Nov 30, 2020 · 0 comments
Closed

read only does not protect this table #3895

monetdb-team opened this issue Nov 30, 2020 · 0 comments
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@monetdb-team monetdb-team commented Nov 30, 2020

Date: 2015-12-22 22:55:33 +0100
From: Anthony Damico <>
To: SQL devs <>
Version: 11.21.5 (Jul2015)
CC: ajdamico, @njnes

Last updated: 2016-01-15 11:37:56 +0100

Comment 21684

Date: 2015-12-22 22:55:33 +0100
From: Anthony Damico <>

User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:43.0) Gecko/20100101 Firefox/43.0
Build Identifier:

example table with one record - still not protected

Reproducible: Always

Steps to Reproduce:

CREATE TABLE my_table AS SELECT 1 AS my_column WITH DATA;
ALTER TABLE my_table SET READ ONLY;
SELECT COUNT(*) FROM my_table;
DROP TABLE my_table;

Actual Results:

Welcome to mclient, the MonetDB/SQL interactive terminal (Jul2015-91007a50e91b)
Database: MonetDB v11.21.8 (Jul2015-91007a50e91b), 'demo'
Type \q to quit, ? for a list of available commands
auto commit mode: on
sql>CREATE TABLE my_table AS SELECT 1 AS my_column WITH DATA;
operation successful (11.739ms)
sql>ALTER TABLE my_table SET READ ONLY;
operation successful (5.956ms)
sql>SELECT COUNT(*) FROM my_table;
+------+
| L1 |
+======+
| 1 |
+------+
1 tuple (0.703ms)
sql>DROP TABLE my_table;
operation successful (5.322ms)
sql>

Expected Results:

table should not be dropped

Comment 21687

Date: 2015-12-23 10:20:42 +0100
From: @njnes

protecting agains ddl statements is done using grant and revoke privileges. The
table level read only flags only protect the row level content, ie disallowes
update/insert and delete statements. This allows for less delta statements, ie
more efficient bat access.

Comment 21688

Date: 2015-12-23 13:17:52 +0100
From: Anthony Damico <>

ahh, i misunderstood that, sorry.

you wrote "resolved nextrelease" - but i do not see a changeset. does that mean you have also prevented DROP TABLE from occurring on read-only tables? or are read only tables allowed to be dropped?

thanks niels!!

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