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sql: introduce crdb_internal.cluster_locks virtual table
This change introduces the new virtual table `crdb_internal.cluster_locks`, as proposed in the KV Lock Observability RFC (#75541), to expose lock contention. This virtual table displays the locks currently tracked in the lock tables in ranges across a cluster, utilizing the KV `QueryLocksRequest` API to gather information on the lock holders as well as the operations waiting on the locks before converting to a user-friendly SQL view that incorporates information about the database, table, schema, and index. For example, ``` root@localhost:26261/defaultdb> select range_id, table_name, lock_key_pretty, txn_id, ts, lock_strength, durability, granted, contended, duration from crdb_internal.cluster_locks; range_id | table_name | lock_key_pretty | txn_id | ts | lock_strength | durability | granted | contended | duration -----------+------------+--------------------------+--------------------------------------+----------------------------+---------------+------------+---------+-----------+------------------ 235 | kv | /Table/115/1/"alex"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.916745 | Exclusive | Replicated | true | true | 00:01:50.607386 235 | kv | /Table/115/1/"alex"/0 | d71ea8eb-21b9-48a0-98b6-82eed84ed76f | 2022-03-26 00:24:02.137125 | None | Replicated | false | true | 00:01:50.607376 235 | kv | /Table/115/1/"bob"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.916745 | Exclusive | Replicated | true | false | 00:01:50.607384 235 | kv | /Table/115/1/"chris"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.916745 | Exclusive | Replicated | true | false | 00:01:50.607383 255 | kv | /Table/115/1/"lauren"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.819704 | Exclusive | Replicated | true | true | 00:01:50.607757 255 | kv | /Table/115/1/"lauren"/0 | d71ea8eb-21b9-48a0-98b6-82eed84ed76f | 2022-03-26 00:24:02.137125 | None | Replicated | false | true | 00:01:50.60773 255 | kv | /Table/115/1/"marilyn"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.819704 | Exclusive | Replicated | true | false | 00:01:50.607755 255 | kv | /Table/115/1/"mike"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.819704 | Exclusive | Replicated | true | false | 00:01:50.607754 255 | kv | /Table/115/1/"nancy"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.819704 | Exclusive | Replicated | true | false | 00:01:50.607745 255 | kv | /Table/115/1/"noah"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.819704 | Exclusive | Replicated | true | false | 00:01:50.607744 255 | kv | /Table/115/1/"paul"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.819704 | Exclusive | Replicated | true | false | 00:01:50.607744 255 | kv | /Table/115/1/"peter"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.819704 | Exclusive | Replicated | true | false | 00:01:50.607743 256 | kv | /Table/115/1/"sam"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.740235 | Exclusive | Replicated | true | true | 00:01:50.607582 256 | kv | /Table/115/1/"sam"/0 | d71ea8eb-21b9-48a0-98b6-82eed84ed76f | 2022-03-26 00:24:02.137125 | None | Replicated | false | true | 00:01:50.607573 256 | kv | /Table/115/1/"thomas"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.740235 | Exclusive | Replicated | true | false | 00:01:50.607581 256 | kv | /Table/115/1/"zebra"/0 | 7471e67b-bbc3-4dd9-a42f-43ec97949b14 | 2022-03-26 00:23:45.740235 | Exclusive | Replicated | true | false | 00:01:50.60758 (16 rows) ``` This internal table is usable for system tenants as well as secondary tenants. It is also useful in conjunction with other `crdb_internal.cluster_*` tables used for observability, and also can be joined with itself to visualize blocked operations, and the transactions that are blocking them. This feature is gated on v22.1, to ensure that older nodes will not receive `kv.Batch` requests with `QueryLocksRequest`s in them. Closes #74834 Release justification: Low risk, high benefit change. Release note (sql change): introducing the `crdb_internal.cluster_locks` virtual table, which exposes the current state of locks on keys tracked by concurrency control. The virtual table displays metadata on locks currently held by transactions, as well as operations waiting to obtain the locks, and as such can be used to visualize active contention. The `VIEWACTIVITY` or `VIEWACTIVITYREDACTED` role option, or the `admin` role, is required to access the virtual table; however, if the user only has the `VIEWACTIVITYREDACTED` role option, the key on which a lock is held will be redacted.
1 parent 6c4c32c commit c80047e

20 files changed

Lines changed: 2629 additions & 1797 deletions

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‎pkg/ccl/logictestccl/testdata/logic_test/cluster_locks_tenant‎

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# LogicTest: 3node-tenant
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# Create a table, write a row, lock it, then switch users.
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statement ok
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CREATE TABLE t (k STRING PRIMARY KEY, v STRING, FAMILY (k,v))
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statement ok
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GRANT ALL ON t TO testuser
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statement ok
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INSERT INTO t VALUES ('a', 'val1'), ('b', 'val2'), ('c', 'val3'), ('l', 'val4'), ('m', 'val5'), ('p', 'val6'), ('s', 'val7'), ('t', 'val8'), ('z', 'val9')
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# Also create an additional user with VIEWACTIVITYREDACTED, with only permissions on t
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statement ok
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CREATE USER testuser2 WITH VIEWACTIVITYREDACTED
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statement ok
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GRANT ALL ON t TO testuser2
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statement ok
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CREATE TABLE t2 (k STRING PRIMARY KEY, v STRING, FAMILY (k,v))
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statement ok
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INSERT INTO t2 VALUES ('a', 'val1'), ('b', 'val2')
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# Start txn1 where we acquire replicated locks
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statement ok
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BEGIN PRIORITY HIGH
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statement ok
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UPDATE t SET v = '_updated' WHERE k >= 'b' AND k < 'x'
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let $root_session
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SHOW session_id
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user testuser
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let $testuser_session
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SHOW session_id
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statement ok
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BEGIN
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# switch back to root, collect data needed for validation
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user root
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let $txn1
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SELECT txns.id FROM crdb_internal.cluster_transactions txns WHERE txns.session_id = '$root_session'
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let $txn2
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SELECT txns.id FROM crdb_internal.cluster_transactions txns WHERE txns.session_id = '$testuser_session'
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user testuser
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query TT async,rowsort readReq
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SELECT * FROM t
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----
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a val1
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b _updated
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c _updated
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l _updated
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m _updated
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p _updated
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s _updated
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t _updated
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z val9
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user root
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query TTT colnames,retry
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SELECT user_name, query, phase FROM crdb_internal.cluster_queries WHERE txn_id='$txn2'
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----
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user_name query phase
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testuser SELECT * FROM t executing
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# looking at each transaction separately, validate the expected results in the lock table
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query TTTTTTBB colnames,retry
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SELECT database_name, schema_name, table_name, lock_key_pretty, lock_strength, durability, granted, contended FROM crdb_internal.cluster_locks WHERE table_name='t' AND txn_id='$txn1'
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----
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database_name schema_name table_name lock_key_pretty lock_strength durability granted contended
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test public t /Table/106/1/"b"/0 Exclusive Replicated true true
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test public t /Table/106/1/"c"/0 Exclusive Replicated true false
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test public t /Table/106/1/"l"/0 Exclusive Replicated true false
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test public t /Table/106/1/"m"/0 Exclusive Replicated true false
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test public t /Table/106/1/"p"/0 Exclusive Replicated true false
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test public t /Table/106/1/"s"/0 Exclusive Replicated true false
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test public t /Table/106/1/"t"/0 Exclusive Replicated true false
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query TTTTTTBB colnames
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SELECT database_name, schema_name, table_name, lock_key_pretty, lock_strength, durability, granted, contended FROM crdb_internal.cluster_locks WHERE table_name='t' AND txn_id='$txn2'
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----
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database_name schema_name table_name lock_key_pretty lock_strength durability granted contended
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test public t /Table/106/1/"b"/0 None Replicated false true
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# check that we can't see keys, potentially revealing PII, with VIEWACTIVITYREDACTED
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user testuser2
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query TTTTTTBB colnames
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SELECT database_name, schema_name, table_name, lock_key_pretty, lock_strength, durability, granted, contended FROM crdb_internal.cluster_locks WHERE table_name='t' AND txn_id='$txn1'
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----
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database_name schema_name table_name lock_key_pretty lock_strength durability granted contended
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test public t · Exclusive Replicated true true
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test public t · Exclusive Replicated true false
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test public t · Exclusive Replicated true false
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test public t · Exclusive Replicated true false
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test public t · Exclusive Replicated true false
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test public t · Exclusive Replicated true false
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test public t · Exclusive Replicated true false
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user root
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query I
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SELECT count(*) FROM crdb_internal.cluster_locks WHERE table_name = 't'
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----
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8
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statement ok
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COMMIT
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query I retry
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SELECT count(*) FROM crdb_internal.cluster_locks WHERE table_name = 't'
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----
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0
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user testuser
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awaitquery readReq
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statement ok
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COMMIT
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user root
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# start txn3
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statement ok
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BEGIN
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user testuser
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# start txn4
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statement ok
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BEGIN
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user root
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query TT rowsort
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SELECT * FROM t FOR UPDATE
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----
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a val1
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b _updated
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c _updated
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l _updated
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m _updated
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p _updated
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s _updated
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t _updated
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z val9
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let $txn3
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SELECT txns.id FROM crdb_internal.cluster_transactions txns WHERE txns.session_id = '$root_session'
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let $txn4
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SELECT txns.id FROM crdb_internal.cluster_transactions txns WHERE txns.session_id = '$testuser_session'
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user testuser
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statement async deleteReq count 7
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DELETE FROM t WHERE k >= 'b' AND k < 'x'
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user root
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query TTT colnames,retry
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SELECT user_name, query, phase FROM crdb_internal.cluster_queries WHERE txn_id='$txn4'
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----
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user_name query phase
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testuser DELETE FROM t WHERE (k >= 'b') AND (k < 'x') executing
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# looking at each transaction separately, validate the expected results in the lock table
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query TTTTTTBB colnames,retry
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SELECT database_name, schema_name, table_name, lock_key_pretty, lock_strength, durability, granted, contended FROM crdb_internal.cluster_locks WHERE table_name='t' AND txn_id='$txn3'
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----
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database_name schema_name table_name lock_key_pretty lock_strength durability granted contended
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test public t /Table/106/1/"a"/0 Exclusive Unreplicated true false
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test public t /Table/106/1/"b"/0 Exclusive Unreplicated true true
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test public t /Table/106/1/"c"/0 Exclusive Unreplicated true false
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test public t /Table/106/1/"l"/0 Exclusive Unreplicated true false
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test public t /Table/106/1/"m"/0 Exclusive Unreplicated true false
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test public t /Table/106/1/"p"/0 Exclusive Unreplicated true false
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test public t /Table/106/1/"s"/0 Exclusive Unreplicated true false
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test public t /Table/106/1/"t"/0 Exclusive Unreplicated true false
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test public t /Table/106/1/"z"/0 Exclusive Unreplicated true false
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query TTTTTTBB colnames
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SELECT database_name, schema_name, table_name, lock_key_pretty, lock_strength, durability, granted, contended FROM crdb_internal.cluster_locks WHERE table_name='t' AND txn_id='$txn4'
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----
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database_name schema_name table_name lock_key_pretty lock_strength durability granted contended
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test public t /Table/106/1/"b"/0 Exclusive Unreplicated false true
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query I
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SELECT count(*) FROM crdb_internal.cluster_locks WHERE table_name = 't'
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----
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10
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statement ok
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ROLLBACK
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user testuser
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awaitstatement deleteReq
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statement ok
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COMMIT
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user root
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query I retry
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SELECT count(*) FROM crdb_internal.cluster_locks WHERE table_name = 't'
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----
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0
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# validate that only locks on keys in privileged tables can be seen
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statement ok
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BEGIN
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query TT rowsort
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SELECT * FROM t FOR UPDATE
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----
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a val1
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z val9
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query TT rowsort
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SELECT * FROM t2 FOR UPDATE
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----
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a val1
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b val2
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query I retry
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SELECT count(*) FROM crdb_internal.cluster_locks WHERE table_name IN ('t','t2')
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----
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4
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user testuser
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query error pq: user testuser does not have VIEWACTIVITY or VIEWACTIVITYREDACTED privilege
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SELECT database_name, schema_name, table_name, lock_key_pretty, lock_strength, durability, granted, contended FROM crdb_internal.cluster_locks
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user testuser2
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query TTTTTTBB colnames
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SELECT database_name, schema_name, table_name, lock_key_pretty, lock_strength, durability, granted, contended FROM crdb_internal.cluster_locks WHERE table_name IN ('t', 't2')
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----
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database_name schema_name table_name lock_key_pretty lock_strength durability granted contended
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test public t · Exclusive Unreplicated true false
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test public t · Exclusive Unreplicated true false
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user root
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statement ok
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ROLLBACK
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query I retry
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SELECT count(*) FROM crdb_internal.cluster_locks WHERE table_name IN ('t','t2')
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----
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0

‎pkg/ccl/logictestccl/testdata/logic_test/crdb_internal_tenant‎

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@@ -43,6 +43,7 @@ crdb_internal cluster_contention_events table NULL NULL NULL
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crdb_internal cluster_database_privileges table NULL NULL NULL
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crdb_internal cluster_distsql_flows table NULL NULL NULL
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crdb_internal cluster_inflight_traces table NULL NULL NULL
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crdb_internal cluster_locks table NULL NULL NULL
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crdb_internal cluster_queries table NULL NULL NULL
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crdb_internal cluster_sessions table NULL NULL NULL
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crdb_internal cluster_settings table NULL NULL NULL

‎pkg/cli/testdata/zip/partial1‎

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@@ -12,6 +12,7 @@ debug zip --concurrency=1 --cpu-profile-duration=0s /dev/null
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[cluster] retrieving SQL data for crdb_internal.cluster_contention_events... writing output: debug/crdb_internal.cluster_contention_events.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows... writing output: debug/crdb_internal.cluster_distsql_flows.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_database_privileges... writing output: debug/crdb_internal.cluster_database_privileges.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_locks... writing output: debug/crdb_internal.cluster_locks.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_queries... writing output: debug/crdb_internal.cluster_queries.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_sessions... writing output: debug/crdb_internal.cluster_sessions.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_settings... writing output: debug/crdb_internal.cluster_settings.txt... done

‎pkg/cli/testdata/zip/partial1_excluded‎

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@@ -12,6 +12,7 @@ debug zip /dev/null --concurrency=1 --exclude-nodes=2 --cpu-profile-duration=0
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[cluster] retrieving SQL data for crdb_internal.cluster_contention_events... writing output: debug/crdb_internal.cluster_contention_events.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows... writing output: debug/crdb_internal.cluster_distsql_flows.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_database_privileges... writing output: debug/crdb_internal.cluster_database_privileges.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_locks... writing output: debug/crdb_internal.cluster_locks.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_queries... writing output: debug/crdb_internal.cluster_queries.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_sessions... writing output: debug/crdb_internal.cluster_sessions.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_settings... writing output: debug/crdb_internal.cluster_settings.txt... done

‎pkg/cli/testdata/zip/partial2‎

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@@ -12,6 +12,7 @@ debug zip --concurrency=1 --cpu-profile-duration=0 /dev/null
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[cluster] retrieving SQL data for crdb_internal.cluster_contention_events... writing output: debug/crdb_internal.cluster_contention_events.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows... writing output: debug/crdb_internal.cluster_distsql_flows.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_database_privileges... writing output: debug/crdb_internal.cluster_database_privileges.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_locks... writing output: debug/crdb_internal.cluster_locks.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_queries... writing output: debug/crdb_internal.cluster_queries.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_sessions... writing output: debug/crdb_internal.cluster_sessions.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_settings... writing output: debug/crdb_internal.cluster_settings.txt... done

‎pkg/cli/testdata/zip/testzip‎

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[cluster] retrieving SQL data for crdb_internal.cluster_contention_events... writing output: debug/crdb_internal.cluster_contention_events.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows... writing output: debug/crdb_internal.cluster_distsql_flows.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_database_privileges... writing output: debug/crdb_internal.cluster_database_privileges.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_locks... writing output: debug/crdb_internal.cluster_locks.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_queries... writing output: debug/crdb_internal.cluster_queries.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_sessions... writing output: debug/crdb_internal.cluster_sessions.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_settings... writing output: debug/crdb_internal.cluster_settings.txt... done

‎pkg/cli/testdata/zip/testzip_concurrent‎

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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows...
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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows: done
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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows: writing output: debug/crdb_internal.cluster_distsql_flows.txt...
66+
[cluster] retrieving SQL data for crdb_internal.cluster_locks...
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[cluster] retrieving SQL data for crdb_internal.cluster_locks: done
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[cluster] retrieving SQL data for crdb_internal.cluster_locks: writing output: debug/crdb_internal.cluster_locks.txt...
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[cluster] retrieving SQL data for crdb_internal.cluster_queries...
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[cluster] retrieving SQL data for crdb_internal.cluster_queries: done
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[cluster] retrieving SQL data for crdb_internal.cluster_queries: writing output: debug/crdb_internal.cluster_queries.txt...

‎pkg/cli/testdata/zip/testzip_tenant‎

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@@ -20,6 +20,7 @@ debug zip --concurrency=1 --cpu-profile-duration=1s /dev/null
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[cluster] retrieving SQL data for crdb_internal.cluster_contention_events... writing output: debug/crdb_internal.cluster_contention_events.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_distsql_flows... writing output: debug/crdb_internal.cluster_distsql_flows.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_database_privileges... writing output: debug/crdb_internal.cluster_database_privileges.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_locks... writing output: debug/crdb_internal.cluster_locks.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_queries... writing output: debug/crdb_internal.cluster_queries.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_sessions... writing output: debug/crdb_internal.cluster_sessions.txt... done
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[cluster] retrieving SQL data for crdb_internal.cluster_settings... writing output: debug/crdb_internal.cluster_settings.txt... done

‎pkg/cli/zip_cluster_wide.go‎

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@@ -77,6 +77,7 @@ var debugZipTablesPerCluster = []string{
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"crdb_internal.cluster_contention_events",
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"crdb_internal.cluster_distsql_flows",
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"crdb_internal.cluster_database_privileges",
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"crdb_internal.cluster_locks",
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"crdb_internal.cluster_queries",
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"crdb_internal.cluster_sessions",
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"crdb_internal.cluster_settings",

‎pkg/sql/BUILD.bazel‎

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@@ -271,6 +271,7 @@ go_library(
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"//pkg/kv/kvclient/kvtenant",
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"//pkg/kv/kvclient/rangecache",
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"//pkg/kv/kvclient/rangefeed",
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"//pkg/kv/kvserver/concurrency/lock",
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"//pkg/kv/kvserver/kvserverbase",
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"//pkg/kv/kvserver/liveness/livenesspb",
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"//pkg/kv/kvserver/protectedts",

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