ClickHouse v21.2 Documentation
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system.current_roles
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2021-03-09 08:14:46
system.current_roles
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Introduction
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F.A.Q.
General
Why ClickHouse is so fast?
What does “Не тормозит” mean?
What is OLAP?
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What is a columnar database?
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What if I have a problem with encodings when connecting to Oracle via ODBC?
How to import JSON into ClickHouse?
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Can I use ClickHouse as a time-series database?
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Which ClickHouse version to use in production?
Is it possible to delete old records from a ClickHouse table?
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any
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uniqCombined64
quantileTDigestWeighted
sum
simpleLinearRegression
avgWeighted
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argMin
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stochasticLogisticRegression
varPop(x)
uniq
corr
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min
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max
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merge
Introduction
null function
numbers
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url
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mysql
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view
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Nothing
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Map(key, value)
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Operations
Introduction
ClickHouse Upgrade
Requirements
Troubleshooting
Monitoring
Access Control and Account Management
Testing Hardware
Optimizing Performance
Query Profiling
System Tables
system.licenses
system.current_roles
system.roles
System Tables
system.detached_parts
system.numbers_mt
system.databases
system.role_grants
system.row_policies
system.enabled_roles
system.opentelemetry_span_log
system.settings_profiles
system.replicas
system.quota_usage
system.functions
system.settings_profile_elements
system.errors
system.grants
system.merge_tree_settings
system.quota_limits
system.trace_log
system.events
system.distributed_ddl_queue
system.storage_policies
system.metric_log
system.contributors
system.numbers
system.mutations
system.table_engines
system.one
system.graphite_retentions
system.quotas
system.time_zones
system.processes
system.settings
system.replication_queue
system.asynchronous_metric_log
system.distribution_queue
system.query_log
system.columns
system.quotas_usage
system.replicated_fetches
system.part_log
system.parts_columns
system.metrics
system.crash_log
system.asynchronous_metrics
system.text_log
system.disks
system.data_type_families
system.users
system.query_thread_log
system.stack_trace
system.tables
system.zookeeper
system.parts
system.merges
system.dictionaries
system.clusters
Server Configuration Parameters
Server Settings
Introduction
Settings
Constraints on Settings
Settings
Settings Profiles
Introduction
Restrictions on Query Complexity
MergeTree tables settings
User Settings
Permissions for Queries
Utilities
clickhouse-copier
Usage Recommendations
Caches
Overview
OpenTelemetry Support
clickhouse-local
clickhouse-odbc-bridge
clickhouse-benchmark
ClickHouse obfuscator
ClickHouse compressor
External User Authenticators and Directories
LDAP
Data Backup
Configuration Files
Introduction
Quotas
Development
Build on Linux for AARCH64 (ARM64)
Third-Party Libraries Used
Continuous Integration Checks
Build on Linux
Source Code Browser
Architecture Overview
C++ Guide
Build on Mac OS X
Testing
How to add test queries to ClickHouse CI
For Beginners
CMake in ClickHouse
Build on Linux for Mac OS X
Commercial
Cloud
Support
Introduction
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