postgresql rename index
I want to understand how safe is the rename command:
ALTER INDEX old_name RENAME TO old_name;
The index was created by command(for the foreign key column):
CREATE INDEX old_name ON table_t1 (user_id);
Does it mean simple update in the postgres system tables or do much more operations. I try to find it in the docs but unsuccess.
postgresql index
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
add a comment |
I want to understand how safe is the rename command:
ALTER INDEX old_name RENAME TO old_name;
The index was created by command(for the foreign key column):
CREATE INDEX old_name ON table_t1 (user_id);
Does it mean simple update in the postgres system tables or do much more operations. I try to find it in the docs but unsuccess.
postgresql index
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
@McNets thank you for help with the question details, no it is index without any features.
– Bear Brown
Dec 3 '18 at 11:50
@McNets: that link is irrelevant for Postgres as it is about SQL Server and Postgres does not have clustered indexes to begin with. (plus it's about dropping an index, not about renaming it)
– a_horse_with_no_name
Dec 3 '18 at 12:05
add a comment |
I want to understand how safe is the rename command:
ALTER INDEX old_name RENAME TO old_name;
The index was created by command(for the foreign key column):
CREATE INDEX old_name ON table_t1 (user_id);
Does it mean simple update in the postgres system tables or do much more operations. I try to find it in the docs but unsuccess.
postgresql index
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
I want to understand how safe is the rename command:
ALTER INDEX old_name RENAME TO old_name;
The index was created by command(for the foreign key column):
CREATE INDEX old_name ON table_t1 (user_id);
Does it mean simple update in the postgres system tables or do much more operations. I try to find it in the docs but unsuccess.
postgresql index
postgresql index
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
edited Dec 3 '18 at 11:39
Bear Brown
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
asked Dec 3 '18 at 11:25
Bear BrownBear Brown
1086
1086
@McNets thank you for help with the question details, no it is index without any features.
– Bear Brown
Dec 3 '18 at 11:50
@McNets: that link is irrelevant for Postgres as it is about SQL Server and Postgres does not have clustered indexes to begin with. (plus it's about dropping an index, not about renaming it)
– a_horse_with_no_name
Dec 3 '18 at 12:05
add a comment |
@McNets thank you for help with the question details, no it is index without any features.
– Bear Brown
Dec 3 '18 at 11:50
@McNets: that link is irrelevant for Postgres as it is about SQL Server and Postgres does not have clustered indexes to begin with. (plus it's about dropping an index, not about renaming it)
– a_horse_with_no_name
Dec 3 '18 at 12:05
@McNets thank you for help with the question details, no it is index without any features.
– Bear Brown
Dec 3 '18 at 11:50
@McNets thank you for help with the question details, no it is index without any features.
– Bear Brown
Dec 3 '18 at 11:50
@McNets: that link is irrelevant for Postgres as it is about SQL Server and Postgres does not have clustered indexes to begin with. (plus it's about dropping an index, not about renaming it)
– a_horse_with_no_name
Dec 3 '18 at 12:05
@McNets: that link is irrelevant for Postgres as it is about SQL Server and Postgres does not have clustered indexes to begin with. (plus it's about dropping an index, not about renaming it)
– a_horse_with_no_name
Dec 3 '18 at 12:05
add a comment |
1 Answer
1
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votes
Quote from the manual
The RENAME form changes the name of the index (...) There is no effect on the stored data
(emphasis mine)
So yes, this is a simple update to the system catalog.
The statement sill needs an exclusive lock on the table if I'm not mistaken, but the lock will only be held for a very short period.
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
add a comment |
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1 Answer
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Quote from the manual
The RENAME form changes the name of the index (...) There is no effect on the stored data
(emphasis mine)
So yes, this is a simple update to the system catalog.
The statement sill needs an exclusive lock on the table if I'm not mistaken, but the lock will only be held for a very short period.
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
add a comment |
Quote from the manual
The RENAME form changes the name of the index (...) There is no effect on the stored data
(emphasis mine)
So yes, this is a simple update to the system catalog.
The statement sill needs an exclusive lock on the table if I'm not mistaken, but the lock will only be held for a very short period.
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
add a comment |
Quote from the manual
The RENAME form changes the name of the index (...) There is no effect on the stored data
(emphasis mine)
So yes, this is a simple update to the system catalog.
The statement sill needs an exclusive lock on the table if I'm not mistaken, but the lock will only be held for a very short period.
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
Quote from the manual
The RENAME form changes the name of the index (...) There is no effect on the stored data
(emphasis mine)
So yes, this is a simple update to the system catalog.
The statement sill needs an exclusive lock on the table if I'm not mistaken, but the lock will only be held for a very short period.
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
answered Dec 3 '18 at 11:53
a_horse_with_no_namea_horse_with_no_name
39.1k775112
39.1k775112
add a comment |
add a comment |
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@McNets thank you for help with the question details, no it is index without any features.
– Bear Brown
Dec 3 '18 at 11:50
@McNets: that link is irrelevant for Postgres as it is about SQL Server and Postgres does not have clustered indexes to begin with. (plus it's about dropping an index, not about renaming it)
– a_horse_with_no_name
Dec 3 '18 at 12:05