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Allow anyone to use size utilities on distributed hypertables #3701

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erimatnor
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@erimatnor erimatnor commented Oct 15, 2021

This change removes a check for USAGE privileges on data nodes
required to query the data node using utility commands, such as
hypertable_size. Normally, PostgreSQL doesn't require USAGE on a
foreign server to query its remote tables. Also, size utilities, like
pg_table_size can be used by anyone---even roles without any
privileges on a table. The behavior on distributed hypertables is now
consistent with PostgreSQL.

Fixes #3698

@erimatnor erimatnor self-assigned this Oct 15, 2021
@erimatnor erimatnor requested a review from a team as a code owner October 15, 2021 11:25
@erimatnor erimatnor requested review from berkley, pmwkaa, mfundul, mkindahl, nikkhils, niksajakovljevic and akuzm and removed request for a team and berkley October 15, 2021 11:25
@erimatnor erimatnor force-pushed the allow-remote-queries-on-data-nodes branch from 8b14c7a to e47e702 Compare October 15, 2021 12:02
@@ -97,11 +97,11 @@ ts_dist_cmd_params_invoke_on_data_nodes(const char *sql, StmtParams *params, Lis
switch (nodeTag(data_nodes))
{
case T_OidList:
data_nodes = data_node_oids_to_node_name_list(data_nodes, ACL_USAGE);
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Maybe it make sense to add mode argument to the ts_dist_cmd_params_invoke_on_data_nodes() here? Not sure if it is needed in other places

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I think invoking queries on remote tables should not require any privileges on the foreign server. According to the docs:

USAGE: For foreign servers, allows creation of foreign tables using the server. Grantees may also create, alter, or drop their own user mappings associated with that server.

So, privileges on foreign servers do not govern querying, which should be restricted by permissions on a table or function, as appropriate.

This change removes a check for `USAGE` privileges on data nodes
required to query the data node using utility commands, such as
`hypertable_size`. Normally, PostgreSQL doesn't require `USAGE` on a
foreign server to query its remote tables. Also, size utilities, like
`pg_table_size` can be used by anyone---even roles without any
privileges on a table. The behavior on distributed hypertables is now
consistent with PostgreSQL.

Fixes timescale#3698
@erimatnor erimatnor force-pushed the allow-remote-queries-on-data-nodes branch from e47e702 to 5f60a29 Compare October 15, 2021 12:15
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codecov bot commented Oct 15, 2021

Codecov Report

Merging #3701 (5f60a29) into master (cb13754) will decrease coverage by 0.00%.
The diff coverage is 50.00%.

Impacted file tree graph

@@            Coverage Diff             @@
##           master    #3701      +/-   ##
==========================================
- Coverage   90.21%   90.21%   -0.01%     
==========================================
  Files         212      212              
  Lines       36980    36980              
==========================================
- Hits        33362    33360       -2     
- Misses       3618     3620       +2     
Impacted Files Coverage Δ
tsl/src/data_node.c 95.47% <25.00%> (-0.37%) ⬇️
tsl/src/remote/dist_commands.c 92.73% <100.00%> (ø)
tsl/src/bgw_policy/job.c 87.50% <0.00%> (-0.06%) ⬇️

Continue to review full report at Codecov.

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@erimatnor erimatnor merged commit 28a5650 into timescale:master Oct 15, 2021
@erimatnor erimatnor deleted the allow-remote-queries-on-data-nodes branch October 15, 2021 13:01
fabriziomello added a commit to fabriziomello/timescaledb that referenced this pull request Oct 27, 2021
This release adds major new features since the 2.4.2 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:

* Continuous Aggregates for Distributed Hypertables
* Support for PostgreSQL 14
* Experimental: Support for timezones in `time_bucket_ng()`, including
the `origin` argument

This release also includes several bug fixes.

**Features**
* timescale#3034 Add support for PostgreSQL 14
* timescale#3435 Add continuous aggregates for distributed hypertables
* timescale#3505 Add support for timezones in `time_bucket_ng()`
* timescale#3598 Improve evaluation of stable functions such as now() on access node
* timescale#3717 Support transparent decompression on individual chunks

**Bugfixes**
* timescale#3580 Fix memory context bug executing TRUNCATE
* timescale#3592 Allow alter column type on distributed hypertable
* timescale#3618 Fix execution of refresh_caggs from user actions
* timescale#3625 Add shared dependencies when creating chunk
* timescale#3626 Fix memory context bug executing TRUNCATE
* timescale#3627 Schema qualify UDTs in multi-node
* timescale#3638 Allow owner change of a data node
* timescale#3654 Fix index attnum mapping in reorder_chunk
* timescale#3661 Fix SkipScan path generation with constant DISTINCT column
* timescale#3667 Fix compress_policy for multi txn handling
* timescale#3673 Fix distributed hypertable DROP within a procedure
* timescale#3701 Allow anyone to use size utilities on distributed hypertables
* timescale#3708 Fix crash in get_aggsplit
* timescale#3709 Fix ordered append pathkey check
* timescale#3712 Fix GRANT/REVOKE ALL IN SCHEMA handling
* timescale#3724 Fix inserts into compressed chunks on hypertables with caggs
* timescale#3727 Fix DirectFunctionCall crash in distributed_exec
* timescale#3728 Fix SkipScan with varchar column
* timescale#3733 Fix ANALYZE crash with custom statistics for custom types
* timescale#3747 Always reset expr context in DecompressChunk

**Thanks**
* @binakot and @sebvett for reporting an issue with DISTINCT queries
* @hardikm10, @DavidPavlicek and @pafiti for reporting bugs on TRUNCATE
* @mjf for reporting an issue with ordered append and JOINs
* @phemmer for reporting the issues on multinode with aggregate queries and evaluation of now()
* @abolognino for reporting an issue with INSERTs into compressed hypertables that have cagg
* @tanglebones for reporting the ANALYZE crash with custom types on multinode
@fabriziomello fabriziomello mentioned this pull request Oct 27, 2021
fabriziomello added a commit to fabriziomello/timescaledb that referenced this pull request Oct 27, 2021
This release adds major new features since the 2.4.2 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:

* Continuous Aggregates for Distributed Hypertables
* Support for PostgreSQL 14
* Experimental: Support for timezones in `time_bucket_ng()`, including
the `origin` argument

This release also includes several bug fixes.

**Features**
* timescale#3034 Add support for PostgreSQL 14
* timescale#3435 Add continuous aggregates for distributed hypertables
* timescale#3505 Add support for timezones in `time_bucket_ng()`

**Bugfixes**
* timescale#3580 Fix memory context bug executing TRUNCATE
* timescale#3592 Allow alter column type on distributed hypertable
* timescale#3598 Improve evaluation of stable functions such as now() on access
node
* timescale#3618 Fix execution of refresh_caggs from user actions
* timescale#3625 Add shared dependencies when creating chunk
* timescale#3626 Fix memory context bug executing TRUNCATE
* timescale#3627 Schema qualify UDTs in multi-node
* timescale#3638 Allow owner change of a data node
* timescale#3654 Fix index attnum mapping in reorder_chunk
* timescale#3661 Fix SkipScan path generation with constant DISTINCT column
* timescale#3667 Fix compress_policy for multi txn handling
* timescale#3673 Fix distributed hypertable DROP within a procedure
* timescale#3701 Allow anyone to use size utilities on distributed hypertables
* timescale#3708 Fix crash in get_aggsplit
* timescale#3709 Fix ordered append pathkey check
* timescale#3712 Fix GRANT/REVOKE ALL IN SCHEMA handling
* timescale#3717 Support transparent decompression on individual chunks
* timescale#3724 Fix inserts into compressed chunks on hypertables with caggs
* timescale#3727 Fix DirectFunctionCall crash in distributed_exec
* timescale#3728 Fix SkipScan with varchar column
* timescale#3733 Fix ANALYZE crash with custom statistics for custom types
* timescale#3747 Always reset expr context in DecompressChunk

**Thanks**
* @binakot and @sebvett for reporting an issue with DISTINCT queries
* @hardikm10, @DavidPavlicek and @pafiti for reporting bugs on TRUNCATE
* @mjf for reporting an issue with ordered append and JOINs
* @phemmer for reporting the issues on multinode with aggregate queries and evaluation of now()
* @abolognino for reporting an issue with INSERTs into compressed hypertables that have cagg
* @tanglebones for reporting the ANALYZE crash with custom types on multinode
fabriziomello added a commit that referenced this pull request Oct 27, 2021
This release adds major new features since the 2.4.2 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:

* Continuous Aggregates for Distributed Hypertables
* Support for PostgreSQL 14
* Experimental: Support for timezones in `time_bucket_ng()`, including
the `origin` argument

This release also includes several bug fixes.

**Features**
* #3034 Add support for PostgreSQL 14
* #3435 Add continuous aggregates for distributed hypertables
* #3505 Add support for timezones in `time_bucket_ng()`

**Bugfixes**
* #3580 Fix memory context bug executing TRUNCATE
* #3592 Allow alter column type on distributed hypertable
* #3598 Improve evaluation of stable functions such as now() on access
node
* #3618 Fix execution of refresh_caggs from user actions
* #3625 Add shared dependencies when creating chunk
* #3626 Fix memory context bug executing TRUNCATE
* #3627 Schema qualify UDTs in multi-node
* #3638 Allow owner change of a data node
* #3654 Fix index attnum mapping in reorder_chunk
* #3661 Fix SkipScan path generation with constant DISTINCT column
* #3667 Fix compress_policy for multi txn handling
* #3673 Fix distributed hypertable DROP within a procedure
* #3701 Allow anyone to use size utilities on distributed hypertables
* #3708 Fix crash in get_aggsplit
* #3709 Fix ordered append pathkey check
* #3712 Fix GRANT/REVOKE ALL IN SCHEMA handling
* #3717 Support transparent decompression on individual chunks
* #3724 Fix inserts into compressed chunks on hypertables with caggs
* #3727 Fix DirectFunctionCall crash in distributed_exec
* #3728 Fix SkipScan with varchar column
* #3733 Fix ANALYZE crash with custom statistics for custom types
* #3747 Always reset expr context in DecompressChunk

**Thanks**
* @binakot and @sebvett for reporting an issue with DISTINCT queries
* @hardikm10, @DavidPavlicek and @pafiti for reporting bugs on TRUNCATE
* @mjf for reporting an issue with ordered append and JOINs
* @phemmer for reporting the issues on multinode with aggregate queries and evaluation of now()
* @abolognino for reporting an issue with INSERTs into compressed hypertables that have cagg
* @tanglebones for reporting the ANALYZE crash with custom types on multinode
fabriziomello added a commit that referenced this pull request Oct 27, 2021
This release adds major new features since the 2.4.2 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:

* Continuous Aggregates for Distributed Hypertables
* Support for PostgreSQL 14
* Experimental: Support for timezones in `time_bucket_ng()`, including
the `origin` argument

This release also includes several bug fixes.

**Features**
* #3034 Add support for PostgreSQL 14
* #3435 Add continuous aggregates for distributed hypertables
* #3505 Add support for timezones in `time_bucket_ng()`

**Bugfixes**
* #3580 Fix memory context bug executing TRUNCATE
* #3592 Allow alter column type on distributed hypertable
* #3598 Improve evaluation of stable functions such as now() on access
node
* #3618 Fix execution of refresh_caggs from user actions
* #3625 Add shared dependencies when creating chunk
* #3626 Fix memory context bug executing TRUNCATE
* #3627 Schema qualify UDTs in multi-node
* #3638 Allow owner change of a data node
* #3654 Fix index attnum mapping in reorder_chunk
* #3661 Fix SkipScan path generation with constant DISTINCT column
* #3667 Fix compress_policy for multi txn handling
* #3673 Fix distributed hypertable DROP within a procedure
* #3701 Allow anyone to use size utilities on distributed hypertables
* #3708 Fix crash in get_aggsplit
* #3709 Fix ordered append pathkey check
* #3712 Fix GRANT/REVOKE ALL IN SCHEMA handling
* #3717 Support transparent decompression on individual chunks
* #3724 Fix inserts into compressed chunks on hypertables with caggs
* #3727 Fix DirectFunctionCall crash in distributed_exec
* #3728 Fix SkipScan with varchar column
* #3733 Fix ANALYZE crash with custom statistics for custom types
* #3747 Always reset expr context in DecompressChunk

**Thanks**
* @binakot and @sebvett for reporting an issue with DISTINCT queries
* @hardikm10, @DavidPavlicek and @pafiti for reporting bugs on TRUNCATE
* @mjf for reporting an issue with ordered append and JOINs
* @phemmer for reporting the issues on multinode with aggregate queries
and evaluation of now()
* @abolognino for reporting an issue with INSERTs into compressed
hypertables that have cagg
* @tanglebones for reporting the ANALYZE crash with custom types on
multinode
fabriziomello added a commit that referenced this pull request Oct 27, 2021
This release adds major new features since the 2.4.2 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:

* Continuous Aggregates for Distributed Hypertables
* Support for PostgreSQL 14
* Experimental: Support for timezones in `time_bucket_ng()`, including
the `origin` argument

This release also includes several bug fixes.

**Features**
* #3034 Add support for PostgreSQL 14
* #3435 Add continuous aggregates for distributed hypertables
* #3505 Add support for timezones in `time_bucket_ng()`

**Bugfixes**
* #3580 Fix memory context bug executing TRUNCATE
* #3592 Allow alter column type on distributed hypertable
* #3598 Improve evaluation of stable functions such as now() on access
node
* #3618 Fix execution of refresh_caggs from user actions
* #3625 Add shared dependencies when creating chunk
* #3626 Fix memory context bug executing TRUNCATE
* #3627 Schema qualify UDTs in multi-node
* #3638 Allow owner change of a data node
* #3654 Fix index attnum mapping in reorder_chunk
* #3661 Fix SkipScan path generation with constant DISTINCT column
* #3667 Fix compress_policy for multi txn handling
* #3673 Fix distributed hypertable DROP within a procedure
* #3701 Allow anyone to use size utilities on distributed hypertables
* #3708 Fix crash in get_aggsplit
* #3709 Fix ordered append pathkey check
* #3712 Fix GRANT/REVOKE ALL IN SCHEMA handling
* #3717 Support transparent decompression on individual chunks
* #3724 Fix inserts into compressed chunks on hypertables with caggs
* #3727 Fix DirectFunctionCall crash in distributed_exec
* #3728 Fix SkipScan with varchar column
* #3733 Fix ANALYZE crash with custom statistics for custom types
* #3747 Always reset expr context in DecompressChunk

**Thanks**
* @binakot and @sebvett for reporting an issue with DISTINCT queries
* @hardikm10, @DavidPavlicek and @pafiti for reporting bugs on TRUNCATE
* @mjf for reporting an issue with ordered append and JOINs
* @phemmer for reporting the issues on multinode with aggregate queries
and evaluation of now()
* @abolognino for reporting an issue with INSERTs into compressed
hypertables that have cagg
* @tanglebones for reporting the ANALYZE crash with custom types on
multinode
fabriziomello added a commit that referenced this pull request Oct 27, 2021
This release adds major new features since the 2.4.2 release.
We deem it moderate priority for upgrading.

This release includes these noteworthy features:

* Continuous Aggregates for Distributed Hypertables
* Support for PostgreSQL 14
* Experimental: Support for timezones in `time_bucket_ng()`, including
the `origin` argument

This release also includes several bug fixes.

**Features**
* #3034 Add support for PostgreSQL 14
* #3435 Add continuous aggregates for distributed hypertables
* #3505 Add support for timezones in `time_bucket_ng()`

**Bugfixes**
* #3580 Fix memory context bug executing TRUNCATE
* #3592 Allow alter column type on distributed hypertable
* #3598 Improve evaluation of stable functions such as now() on access
node
* #3618 Fix execution of refresh_caggs from user actions
* #3625 Add shared dependencies when creating chunk
* #3626 Fix memory context bug executing TRUNCATE
* #3627 Schema qualify UDTs in multi-node
* #3638 Allow owner change of a data node
* #3654 Fix index attnum mapping in reorder_chunk
* #3661 Fix SkipScan path generation with constant DISTINCT column
* #3667 Fix compress_policy for multi txn handling
* #3673 Fix distributed hypertable DROP within a procedure
* #3701 Allow anyone to use size utilities on distributed hypertables
* #3708 Fix crash in get_aggsplit
* #3709 Fix ordered append pathkey check
* #3712 Fix GRANT/REVOKE ALL IN SCHEMA handling
* #3717 Support transparent decompression on individual chunks
* #3724 Fix inserts into compressed chunks on hypertables with caggs
* #3727 Fix DirectFunctionCall crash in distributed_exec
* #3728 Fix SkipScan with varchar column
* #3733 Fix ANALYZE crash with custom statistics for custom types
* #3747 Always reset expr context in DecompressChunk

**Thanks**
* @binakot and @sebvett for reporting an issue with DISTINCT queries
* @hardikm10, @DavidPavlicek and @pafiti for reporting bugs on TRUNCATE
* @mjf for reporting an issue with ordered append and JOINs
* @phemmer for reporting the issues on multinode with aggregate queries
and evaluation of now()
* @abolognino for reporting an issue with INSERTs into compressed
hypertables that have cagg
* @tanglebones for reporting the ANALYZE crash with custom types on
multinode
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Wrong result returned by hypertable_size if no privileges granted on foreign servers
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