- About MogDB
- Quick Start
- Characteristic Description
- Overview
- High Performance
- CBO Optimizer
- LLVM
- Vectorized Engine
- Hybrid Row-Column Store
- Adaptive Compression
- Adaptive Two-phase Hash Aggregation
- SQL Bypass
- Kunpeng NUMA Architecture Optimization
- High Concurrency of Thread Pools
- SMP for Parallel Execution
- Xlog no Lock Flush
- Parallel Page-based Redo For Ustore
- Row-Store Execution to Vectorized Execution
- Astore Row Level Compression
- BTree Index Compression
- Tracing SQL Function
- Parallel Index Scan
- Parallel Query Optimization
- Enhancement of Tracing Backend Key Thread
- Ordering Operator Optimization
- OCK-accelerated Data Transmission
- OCK SCRLock Accelerate Distributed Lock
- Enhancement of WAL Redo Performance
- Enhancement of Dirty Pages Flushing Performance
- Sequential Scan Prefetch
- Ustore SMP Parallel Scanning
- Statement Level PLSQL Function Cache Support
- High Availability (HA)
- Primary/Standby
- Logical Replication
- Logical Backup
- Physical Backup
- Automatic Job Retry upon Failure
- Ultimate RTO
- High Availability Based on the Paxos Protocol
- Cascaded Standby Server
- Delayed Replay
- Adding or Deleting a Standby Server
- Delaying Entering the Maximum Availability Mode
- Parallel Logical Decoding
- DCF
- CM(Cluster Manager)
- Global SysCache
- Using a Standby Node to Build a Standby Node
- Two City and Three Center DR
- CM Cluster Management Component Supporting Two Node Deployment
- Query of the Original DDL Statement for a View
- MogDB/CM/PTK Dual Network Segment Support
- Enhanced Efficiency of Logical Backup and Restore
- Maintainability
- Workload Diagnosis Report (WDR)
- Slow SQL Diagnosis
- Session Performance Diagnosis
- System KPI-aided Diagnosis
- Fault Diagnosis
- Extension Splitting
- Built-in Stack Tool
- SQL PATCH
- Lightweight Lock Export and Analysis
- DCF Module Tracing
- Error When Writing Illegal Characters
- Support For Pageinspect & Pagehack
- Autonomous Transaction Management View and Termination
- Corrupt Files Handling
- Compatibility
- Add %rowtype Attribute To The View
- Aggregate Functions Distinct Performance Optimization
- Aggregate Functions Support Keep Clause
- Aggregate Functions Support Scenario Extensions
- Compatible With MySQL Alias Support For Single Quotes
- current_date/current_time Keywords As Field Name
- Custom Type Array
- For Update Support Outer Join
- MogDB Supports Insert All
- Oracle DBLink Syntax Compatibility
- Remove Type Conversion Hint When Creating PACKAGE/FUNCTION/PROCEDURE
- Support Bypass Method When Merge Into Hit Index
- Support For Adding Nocopy Attributes To Procedure And Function Parameters
- Support For Passing The Count Attribute Of An Array As A Parameter Of The Array Extend
- Support Q Quote Escape Character
- Support Subtracting Two Date Types To Return Numeric Type
- Support table()
- Support To Keep The Same Name After The End With Oracle
- Support Where Current Of
- Support For Constants In Package As Default Values
- Support PLPGSQL subtype
- Support Synonym Calls Without Parentheses For Function Without Parameters
- Support For dbms_utility.format_error_backtrace
- Support for PIVOT and UNPIVOT Syntax
- Mod Function Compatibility
- Support for Nesting of Aggregate Functions
- ORDER BY/GROUP BY Scenario Expansion
- Support for Modifying Table Log Properties After Table Creation
- Support for INSERT ON CONFLICT Clause
- Support for AUTHID CURRENT_USER
- Support for Stored Procedure OUT Parameters in PBE Mode
- Database Security
- Access Control Model
- Separation of Control and Access Permissions
- Database Encryption Authentication
- Data Encryption and Storage
- Database Audit
- Network Communication Security
- Resource Label
- Unified Audit
- Dynamic Data Anonymization
- Row-Level Access Control
- Password Strength Verification
- Equality Query in a Fully-encrypted Database
- Ledger Database Mechanism
- Transparent Data Encryption
- Enterprise-Level Features
- Support for Functions and Stored Procedures
- SQL Hints
- Full-Text Indexing
- Copy Interface for Error Tolerance
- Partitioning
- Support for Advanced Analysis Functions
- Materialized View
- HyperLogLog
- Creating an Index Online
- Autonomous Transaction
- Global Temporary Table
- Pseudocolumn ROWNUM
- Stored Procedure Debugging
- JDBC Client Load Balancing and Read/Write Isolation
- In-place Update Storage Engine
- Publication-Subscription
- Foreign Key Lock Enhancement
- Data Compression in OLTP Scenarios
- Transaction Async Submit
- Index Creation Parallel Control
- Dynamic Partition Pruning
- COPY Import Optimization
- SQL Running Status Observation
- BRIN Index
- BLOOM Index
- Event Trigger
- Scrollable Cursor Support for Reverse Retrieval
- Support for Pruning Subquery Projection Columns
- Pruning ORDER BY in Subqueries
- Automatic Creation of Indexes Supporting Fuzzy Matching
- Support for Importing and Exporting Specific Objects
- Application Development Interfaces
- AI Capabilities
- Middleware
- Workload Management
- Installation Guide
- Upgrade Guide
- Administrator Guide
- Localization
- Routine Maintenance
- Starting and Stopping MogDB
- Using the gsql Client for Connection
- Routine Maintenance
- Checking OS Parameters
- Checking MogDB Health Status
- Checking Database Performance
- Checking and Deleting Logs
- Checking Time Consistency
- Checking The Number of Application Connections
- Routinely Maintaining Tables
- Routinely Recreating an Index
- Exporting and Viewing the WDR
- Data Security Maintenance Suggestions
- Slow SQL Diagnosis
- Log Reference
- Primary and Standby Management
- Column-store Tables Management
- Backup and Restoration
- Database Deployment Solutions
- Importing and Exporting Data
- High Available Guide
- AI Features Guide
- AI4DB: Autonomous Database O&M
- DBMind Mode
- Components that Support DBMind
- AI Sub-functions of the DBMind
- ABO Optimizer
- DB4AI: Database-driven AI
- AI4DB: Autonomous Database O&M
- Security Guide
- Developer Guide
- Application Development Guide
- Development Specifications
- Development Based on JDBC
- JDBC Package, Driver Class, and Environment Class
- Development Process
- Loading the Driver
- Connecting to a Database
- Connecting to the Database (Using SSL)
- Connecting to the Database (Using UDS)
- Running SQL Statements
- Processing Data in a Result Set
- Closing a Connection
- Managing Logs
- Example: Common Operations
- Example: Retrying SQL Queries for Applications
- Example: Importing and Exporting Data Through Local Files
- Example 2: Migrating Data from a MY Database to MogDB
- Example: Logic Replication Code
- Example: Parameters for Connecting to the Database in Different Scenarios
- Example: JDBC Primary/Standby Cluster Load Balancing
- JDBC API Reference
- java.sql.Connection
- java.sql.CallableStatement
- java.sql.DatabaseMetaData
- java.sql.Driver
- java.sql.PreparedStatement
- java.sql.ResultSet
- java.sql.ResultSetMetaData
- java.sql.Statement
- javax.sql.ConnectionPoolDataSource
- javax.sql.DataSource
- javax.sql.PooledConnection
- javax.naming.Context
- javax.naming.spi.InitialContextFactory
- CopyManager
- JDBC-based Common Parameter Reference
- JDBC Release Notes
- Development Based on ODBC
- Development Based on libpq
- Psycopg2-Based Development
- Commissioning
- Stored Procedure
- User Defined Functions
- PL/pgSQL-SQL Procedural Language
- Scheduled Jobs
- Autonomous Transaction
- Logical Replication
- Extension
- MySQL Compatibility Description
- Dolphin Extension
- Dolphin Overview
- Dolphin Installation
- Dolphin Restrictions
- Dolphin Syntax
- SQL Reference
- Keywords
- Data Types
- Functions and Operators
- Assignment Operators
- Character Processing Functions and Operators
- Arithmetic Functions and Operators
- Dolphin Lock
- Date and Time Processing Functions and Operators
- Advisory Lock Functions
- Network Address Functions and Operators
- Conditional Expression Functions
- Aggregate Functions
- System Information Functions
- Logical Operators
- Bit String Functions and Operators
- JSON-JSONB Functions and Operators
- Type Conversion Functions
- Compatible Operators and Operations
- Comment Operators
- Expressions
- DDL Syntax
- DML Syntax
- DCL Syntax
- SQL Syntax
- ALTER DATABASE
- ALTER FUNCTION
- ALTER PROCEDURE
- ALTER SERVER
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLESPACE
- ALTER VIEW
- ANALYZE | ANALYSE
- AST
- CHECKSUM TABLE
- CREATE DATABASE
- CREATE FUNCTION
- CREATE INDEX
- CREATE PROCEDURE
- CREATE SERVER
- CREATE TABLE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TABLESPACE
- CREATE TRIGGER
- CREATE VIEW
- DESCRIBE TABLE
- DO
- DROP DATABASE
- DROP INDEX
- DROP TABLESPACE
- EXECUTE
- EXPLAIN
- FLUSH BINARY LOGS
- GRANT
- GRANT/REVOKE PROXY
- INSERT
- KILL
- LOAD DATA
- OPTIMIZE TABLE
- PREPARE
- RENAME TABLE
- RENAME USER
- REVOKE
- SELECT
- SELECT HINT
- SET CHARSET
- SET PASSWORD
- SHOW CHARACTER SET
- SHOW COLLATION
- SHOW COLUMNS
- SHOW CREATE DATABASE
- SHOW CREATE FUNCTION
- SHOW CREATE PROCEDURE
- SHOW CREATE TABLE
- SHOW CREATE TRIGGER
- SHOW CREATE VIEW
- SHOW DATABASES
- SHOW FUNCTION STATUS
- SHOW GRANTS
- SHOW INDEX
- SHOW MASTER STATUS
- SHOW PLUGINS
- SHOW PRIVILEGES
- SHOW PROCEDURE STATUS
- SHOW PROCESSLIST
- SHOW SLAVE HOSTS
- SHOW STATUS
- SHOW TABLES
- SHOW TABLE STATUS
- SHOW TRIGGERS
- SHOW VARIABLES
- SHOW WARNINGS/ERRORS
- UPDATE
- USE db_name
- System Views
- GUC Parameters
- Resetting Parameters
- Stored Procedures
- Identifiers
- SQL Reference
- MySQL Syntax Compatibility Assessment Tool
- Dolphin Extension
- Materialized View
- Partition Management
- Application Development Guide
- Performance Tuning Guide
- Reference Guide
- System Catalogs and System Views
- Overview
- Querying a System Catalog
- System Catalogs
- GS_ASP
- GS_AUDITING_POLICY
- GS_AUDITING_POLICY_ACCESS
- GS_AUDITING_POLICY_FILTERS
- GS_AUDITING_POLICY_PRIVILEGES
- GS_CLIENT_GLOBAL_KEYS
- GS_CLIENT_GLOBAL_KEYS_ARGS
- GS_COLUMN_KEYS
- GS_COLUMN_KEYS_ARGS
- GS_DB_PRIVILEGE
- GS_ENCRYPTED_COLUMNS
- GS_ENCRYPTED_PROC
- GS_GLOBAL_CHAIN
- GS_GLOBAL_CONFIG
- GS_MASKING_POLICY
- GS_MASKING_POLICY_ACTIONS
- GS_MASKING_POLICY_FILTERS
- GS_MATVIEW
- GS_MATVIEW_DEPENDENCY
- GS_MODEL_WAREHOUSE
- GS_OPT_MODEL
- GS_PACKAGE
- GS_POLICY_LABEL
- GS_RECYCLEBIN
- GS_TXN_SNAPSHOT
- GS_UID
- GS_WLM_EC_OPERATOR_INFO
- GS_WLM_INSTANCE_HISTORY
- GS_WLM_OPERATOR_INFO
- GS_WLM_PLAN_ENCODING_TABLE
- GS_WLM_PLAN_OPERATOR_INFO
- GS_WLM_SESSION_QUERY_INFO_ALL
- GS_WLM_USER_RESOURCE_HISTORY
- PG_AGGREGATE
- PG_AM
- PG_AMOP
- PG_AMPROC
- PG_APP_WORKLOADGROUP_MAPPING
- PG_ATTRDEF
- PG_ATTRIBUTE
- PG_AUTH_HISTORY
- PG_AUTH_MEMBERS
- PG_AUTHID
- PG_CAST
- PG_CLASS
- PG_COLLATION
- PG_CONSTRAINT
- PG_CONVERSION
- PG_DATABASE
- PG_DB_ROLE_SETTING
- PG_DEFAULT_ACL
- PG_DEPEND
- PG_DESCRIPTION
- PG_DIRECTORY
- PG_ENUM
- PG_EVENT_TRIGGER
- PG_EXTENSION
- PG_EXTENSION_DATA_SOURCE
- PG_FOREIGN_DATA_WRAPPER
- PG_FOREIGN_SERVER
- PG_FOREIGN_TABLE
- PG_HASHBUCKET
- PG_INDEX
- PG_INHERITS
- PG_JOB
- PG_JOB_PROC
- PG_LANGUAGE
- PG_LARGEOBJECT
- PG_LARGEOBJECT_METADATA
- PG_NAMESPACE
- PG_OBJECT
- PG_OPCLASS
- PG_OPERATOR
- PG_OPFAMILY
- PG_PARTITION
- PG_PLTEMPLATE
- PG_PROC
- PG_PUBLICATION
- PG_PUBLICATION_REL
- PG_RANGE
- PG_REPLICATION_ORIGIN
- PG_RESOURCE_POOL
- PG_REWRITE
- PG_RLSPOLICY
- PG_SECLABEL
- PG_SET
- PG_SHDEPEND
- PG_SHDESCRIPTION
- PG_SHSECLABEL
- PG_STATISTIC
- PG_STATISTIC_EXT
- PG_SUBSCRIPTION
- PG_SUBSCRIPTION_REL
- PG_SYNONYM
- PG_TABLESPACE
- PG_TRIGGER
- PG_TS_CONFIG
- PG_TS_CONFIG_MAP
- PG_TS_DICT
- PG_TS_PARSER
- PG_TS_TEMPLATE
- PG_TYPE
- PG_USER_MAPPING
- PG_USER_STATUS
- PG_WORKLOAD_GROUP
- PGXC_CLASS
- PGXC_GROUP
- PGXC_NODE
- PGXC_SLICE
- PLAN_TABLE_DATA
- STATEMENT_HISTORY
- System Views
- GET_GLOBAL_PREPARED_XACTS(Discarded)
- GS_ASYNC_SUBMIT_SESSIONS_STATUS
- GS_AUDITING
- GS_AUDITING_ACCESS
- GS_AUDITING_PRIVILEGE
- GS_CLUSTER_RESOURCE_INFO
- GS_COMPRESSION
- GS_DB_PRIVILEGES
- GS_FILE_STAT
- GS_GSC_MEMORY_DETAIL
- GS_INSTANCE_TIME
- GS_LABELS
- GS_LSC_MEMORY_DETAIL
- GS_MASKING
- GS_MATVIEWS
- GS_OS_RUN_INFO
- GS_REDO_STAT
- GS_SESSION_CPU_STATISTICS
- GS_SESSION_MEMORY
- GS_SESSION_MEMORY_CONTEXT
- GS_SESSION_MEMORY_DETAIL
- GS_SESSION_MEMORY_STATISTICS
- GS_SESSION_STAT
- GS_SESSION_TIME
- GS_SHARED_MEMORY_DETAIL
- GS_SQL_COUNT
- GS_STAT_SESSION_CU
- GS_THREAD_MEMORY_CONTEXT
- GS_TOTAL_MEMORY_DETAIL
- GS_WLM_CGROUP_INFO
- GS_WLM_EC_OPERATOR_STATISTICS
- GS_WLM_OPERATOR_HISTORY
- GS_WLM_OPERATOR_STATISTICS
- GS_WLM_PLAN_OPERATOR_HISTORY
- GS_WLM_REBUILD_USER_RESOURCE_POOL
- GS_WLM_RESOURCE_POOL
- GS_WLM_SESSION_HISTORY
- GS_WLM_SESSION_INFO
- GS_WLM_SESSION_INFO_ALL
- GS_WLM_SESSION_STATISTICS
- GS_WLM_USER_INFO
- IOS_STATUS
- MPP_TABLES
- PG_AVAILABLE_EXTENSION_VERSIONS
- PG_AVAILABLE_EXTENSIONS
- PG_COMM_DELAY
- PG_COMM_RECV_STREAM
- PG_COMM_SEND_STREAM
- PG_COMM_STATUS
- PG_CONTROL_GROUP_CONFIG
- PG_CURSORS
- PG_EXT_STATS
- PG_GET_INVALID_BACKENDS
- PG_GET_SENDERS_CATCHUP_TIME
- PG_GROUP
- PG_GTT_ATTACHED_PIDS
- PG_GTT_RELSTATS
- PG_GTT_STATS
- PG_INDEXES
- PG_LOCKS
- PG_NODE_ENV
- PG_OS_THREADS
- PG_PREPARED_STATEMENTS
- PG_PREPARED_XACTS
- PG_PUBLICATION_TABLES
- PG_REPLICATION_ORIGIN_STATUS
- PG_REPLICATION_SLOTS
- PG_RLSPOLICIES
- PG_ROLES
- PG_RULES
- PG_RUNNING_XACTS
- PG_SECLABELS
- PG_SESSION_IOSTAT
- PG_SESSION_WLMSTAT
- PG_SETTINGS
- PG_SHADOW
- PG_STAT_ACTIVITY
- PG_STAT_ACTIVITY_NG
- PG_STAT_ALL_INDEXES
- PG_STAT_ALL_TABLES
- PG_STAT_BAD_BLOCK
- PG_STAT_BGWRITER
- PG_STAT_DATABASE
- PG_STAT_DATABASE_CONFLICTS
- PG_STAT_REPLICATION
- PG_STAT_SUBSCRIPTION
- PG_STAT_SYS_INDEXES
- PG_STAT_SYS_TABLES
- PG_STAT_USER_FUNCTIONS
- PG_STAT_USER_INDEXES
- PG_STAT_USER_TABLES
- PG_STAT_XACT_ALL_TABLES
- PG_STAT_XACT_SYS_TABLES
- PG_STAT_XACT_USER_FUNCTIONS
- PG_STAT_XACT_USER_TABLES
- PG_STATIO_ALL_INDEXES
- PG_STATIO_ALL_SEQUENCES
- PG_STATIO_ALL_TABLES
- PG_STATIO_SYS_INDEXES
- PG_STATIO_SYS_SEQUENCES
- PG_STATIO_SYS_TABLES
- PG_STATIO_USER_INDEXES
- PG_STATIO_USER_SEQUENCES
- PG_STATIO_USER_TABLES
- PG_STATS
- PG_TABLES
- PG_TDE_INFO
- PG_THREAD_WAIT_STATUS
- PG_TIMEZONE_ABBREVS
- PG_TIMEZONE_NAMES
- PG_TOTAL_MEMORY_DETAIL
- PG_TOTAL_USER_RESOURCE_INFO
- PG_TOTAL_USER_RESOURCE_INFO_OID
- PG_USER
- PG_USER_MAPPINGS
- PG_VARIABLE_INFO
- PG_VIEWS
- PG_WLM_STATISTICS
- PGXC_PREPARED_XACTS
- PLAN_TABLE
- PATCH_INFORMATION_TABLE
- Functions and Operators
- Logical Operators
- Comparison Operators
- Character Processing Functions and Operators
- Binary String Functions and Operators
- Bit String Functions and Operators
- Mode Matching Operators
- Mathematical Functions and Operators
- Date and Time Processing Functions and Operators
- Type Conversion Functions
- Geometric Functions and Operators
- Network Address Functions and Operators
- Text Search Functions and Operators
- JSON/JSONB Functions and Operators
- HLL Functions and Operators
- SEQUENCE Functions
- Array Functions and Operators
- Range Functions and Operators
- Aggregate Functions
- Window Functions(Analysis Functions)
- Security Functions
- Ledger Database Functions
- Encrypted Equality Functions
- Set Returning Functions
- Conditional Expression Functions
- System Information Functions
- System Administration Functions
- Configuration Settings Functions
- Universal File Access Functions
- Server Signal Functions
- Backup and Restoration Control Functions
- Snapshot Synchronization Functions
- Database Object Functions
- Advisory Lock Functions
- Logical Replication Functions
- Segment-Page Storage Functions
- Other Functions
- Undo System Functions
- Row-store Compression System Functions
- Statistics Information Functions
- Trigger Functions
- Event Trigger Functions
- Hash Function
- Prompt Message Function
- Global Temporary Table Functions
- Fault Injection System Function
- AI Feature Functions
- Dynamic Data Masking Functions
- Other System Functions
- Internal Functions
- Global SysCache Feature Functions
- Data Damage Detection and Repair Functions
- XML Functions
- Obsolete Functions
- Supported Data Types
- SQL Syntax
- ABORT
- ALTER AGGREGATE
- ALTER AUDIT POLICY
- ALTER DATABASE
- ALTER DATA SOURCE
- ALTER DEFAULT PRIVILEGES
- ALTER DIRECTORY
- ALTER EVENT
- ALTER EVENT TRIGGER
- ALTER EXTENSION
- ALTER FOREIGN DATA WRAPPER
- ALTER FOREIGN TABLE
- ALTER FUNCTION
- ALTER GLOBAL CONFIGURATION
- ALTER GROUP
- ALTER INDEX
- ALTER LANGUAGE
- ALTER LARGE OBJECT
- ALTER MASKING POLICY
- ALTER MATERIALIZED VIEW
- ALTER OPERATOR
- ALTER PACKAGE
- ALTER PROCEDURE
- ALTER PUBLICATION
- ALTER RESOURCE LABEL
- ALTER RESOURCE POOL
- ALTER ROLE
- ALTER ROW LEVEL SECURITY POLICY
- ALTER RULE
- ALTER SCHEMA
- ALTER SEQUENCE
- ALTER SERVER
- ALTER SESSION
- ALTER SUBSCRIPTION
- ALTER SYNONYM
- ALTER SYSTEM KILL SESSION
- ALTER SYSTEM SET
- ALTER TABLE
- ALTER TABLE PARTITION
- ALTER TABLE SUBPARTITION
- ALTER TABLESPACE
- ALTER TEXT SEARCH CONFIGURATION
- ALTER TEXT SEARCH DICTIONARY
- ALTER TRIGGER
- ALTER TYPE
- ALTER USER
- ALTER USER MAPPING
- ALTER VIEW
- ANALYZE | ANALYSE
- BEGIN
- CALL
- CHECKPOINT
- CLEAN CONNECTION
- CLOSE
- CLUSTER
- COMMENT
- COMMIT | END
- COMMIT PREPARED
- CONNECT BY
- COPY
- CREATE AGGREGATE
- CREATE AUDIT POLICY
- CREATE CAST
- CREATE CLIENT MASTER KEY
- CREATE COLUMN ENCRYPTION KEY
- CREATE DATABASE
- CREATE DATA SOURCE
- CREATE DIRECTORY
- CREATE EVENT
- CREATE EVENT TRIGGER
- CREATE EXTENSION
- CREATE FOREIGN DATA WRAPPER
- CREATE FOREIGN TABLE
- CREATE FUNCTION
- CREATE GROUP
- CREATE INCREMENTAL MATERIALIZED VIEW
- CREATE INDEX
- CREATE LANGUAGE
- CREATE MASKING POLICY
- CREATE MATERIALIZED VIEW
- CREATE MODEL
- CREATE OPERATOR
- CREATE PACKAGE
- CREATE PROCEDURE
- CREATE PUBLICATION
- CREATE RESOURCE LABEL
- CREATE RESOURCE POOL
- CREATE ROLE
- CREATE ROW LEVEL SECURITY POLICY
- CREATE RULE
- CREATE SCHEMA
- CREATE SEQUENCE
- CREATE SERVER
- CREATE SUBSCRIPTION
- CREATE SYNONYM
- CREATE TABLE
- CREATE TABLE AS
- CREATE TABLE PARTITION
- CREATE TABLESPACE
- CREATE TABLE SUBPARTITION
- CREATE TEXT SEARCH CONFIGURATION
- CREATE TEXT SEARCH DICTIONARY
- CREATE TRIGGER
- CREATE TYPE
- CREATE USER
- CREATE USER MAPPING
- CREATE VIEW
- CREATE WEAK PASSWORD DICTIONARY
- CURSOR
- DEALLOCATE
- DECLARE
- DELETE
- DELIMITER
- DO
- DROP AGGREGATE
- DROP AUDIT POLICY
- DROP CAST
- DROP CLIENT MASTER KEY
- DROP COLUMN ENCRYPTION KEY
- DROP DATABASE
- DROP DATA SOURCE
- DROP DIRECTORY
- DROP EVENT
- DROP EVENT TRIGGER
- DROP EXTENSION
- DROP FOREIGN DATA WRAPPER
- DROP FOREIGN TABLE
- DROP FUNCTION
- DROP GLOBAL CONFIGURATION
- DROP GROUP
- DROP INDEX
- DROP LANGUAGE
- DROP MASKING POLICY
- DROP MATERIALIZED VIEW
- DROP MODEL
- DROP OPERATOR
- DROP OWNED
- DROP PACKAGE
- DROP PROCEDURE
- DROP PUBLICATION
- DROP RESOURCE LABEL
- DROP RESOURCE POOL
- DROP ROLE
- DROP ROW LEVEL SECURITY POLICY
- DROP RULE
- DROP SCHEMA
- DROP SEQUENCE
- DROP SERVER
- DROP SUBSCRIPTION
- DROP SYNONYM
- DROP TABLE
- DROP TABLESPACE
- DROP TEXT SEARCH CONFIGURATION
- DROP TEXT SEARCH DICTIONARY
- DROP TRIGGER
- DROP TYPE
- DROP USER
- DROP USER MAPPING
- DROP VIEW
- DROP WEAK PASSWORD DICTIONARY
- EXECUTE
- EXECUTE DIRECT
- EXPLAIN
- EXPLAIN PLAN
- FETCH
- GRANT
- INSERT
- LOCK
- MERGE INTO
- MOVE
- PREDICT BY
- PREPARE
- PREPARE TRANSACTION
- PURGE
- REASSIGN OWNED
- REFRESH INCREMENTAL MATERIALIZED VIEW
- REFRESH MATERIALIZED VIEW
- REINDEX
- RELEASE SAVEPOINT
- RESET
- REVOKE
- ROLLBACK
- ROLLBACK PREPARED
- ROLLBACK TO SAVEPOINT
- SAVEPOINT
- SELECT
- SELECT INTO
- SET
- SET CONSTRAINTS
- SET ROLE
- SET SESSION AUTHORIZATION
- SET TRANSACTION
- SHOW
- SHOW EVENTS
- SHRINK
- SHUTDOWN
- SNAPSHOT
- START TRANSACTION
- TIMECAPSULE TABLE
- TRUNCATE
- UPDATE
- VACUUM
- VALUES
- SQL Reference
- MogDB SQL
- Keywords
- Constant and Macro
- Expressions
- Type Conversion
- Full Text Search
- System Operation
- DDL Syntax Overview
- DML Syntax Overview
- DCL Syntax Overview
- Subquery
- LLVM
- Alias
- Lock
- Transaction
- Ordinary Table
- Partitioned Table
- Index
- Constraints
- Cursors
- Anonymous Block
- Trigger
- INSERT_RIGHT_REF_DEFAULT_VALUE
- Appendix
- GUC Parameters
- GUC Parameter Usage
- GUC Parameter List
- File Location
- Connection and Authentication
- Resource Consumption
- Write Ahead Log
- HA Replication
- Query Planning
- Error Reporting and Logging
- Alarm Detection
- Statistics During the Database Running
- Load Management
- Automatic Vacuuming
- Default Settings of Client Connection
- Lock Management
- Version and Platform Compatibility
- Faut Tolerance
- Connection Pool Parameters
- MogDB Transaction
- Replication Parameters of Two Database Instances
- Developer Options
- Auditing
- CM Parameters
- Backend Compression
- Upgrade Parameters
- Miscellaneous Parameters
- Wait Events
- Query
- System Performance Snapshot
- Security Configuration
- Global Temporary Table
- HyperLogLog
- Scheduled Task
- Thread Pool
- User-defined Functions
- Backup and Restoration
- DCF Parameters Settings
- Flashback
- Rollback Parameters
- Reserved Parameters
- AI Features
- Global SysCache Parameters
- Multi-Level Cache Management Parameters
- Resource Pooling Parameters
- Parameters Related to Efficient Data Compression Algorithms
- Writer Statement Parameters Supported by Standby Servers
- Data Import and Export
- Delimiter
- Appendix
- Schema
- Information Schema
- DBE_PERF
- OS
- Instance
- Memory
- File
- Object
- STAT_USER_TABLES
- SUMMARY_STAT_USER_TABLES
- GLOBAL_STAT_USER_TABLES
- STAT_USER_INDEXES
- SUMMARY_STAT_USER_INDEXES
- GLOBAL_STAT_USER_INDEXES
- STAT_SYS_TABLES
- SUMMARY_STAT_SYS_TABLES
- GLOBAL_STAT_SYS_TABLES
- STAT_SYS_INDEXES
- SUMMARY_STAT_SYS_INDEXES
- GLOBAL_STAT_SYS_INDEXES
- STAT_ALL_TABLES
- SUMMARY_STAT_ALL_TABLES
- GLOBAL_STAT_ALL_TABLES
- STAT_ALL_INDEXES
- SUMMARY_STAT_ALL_INDEXES
- GLOBAL_STAT_ALL_INDEXES
- STAT_DATABASE
- SUMMARY_STAT_DATABASE
- GLOBAL_STAT_DATABASE
- STAT_DATABASE_CONFLICTS
- SUMMARY_STAT_DATABASE_CONFLICTS
- GLOBAL_STAT_DATABASE_CONFLICTS
- STAT_XACT_ALL_TABLES
- SUMMARY_STAT_XACT_ALL_TABLES
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- SUMMARY_STAT_BAD_BLOCK
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- STATEMENT_RESPONSETIME_PERCENTILE
- STATEMENT_COMPLEX_RUNTIME
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- STATIO_ALL_TABLES
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- Utility
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- Error Code Reference
- Description of SQL Error Codes
- Third-Party Library Error Codes
- GAUSS-00001 - GAUSS-00100
- GAUSS-00101 - GAUSS-00200
- GAUSS 00201 - GAUSS 00300
- GAUSS 00301 - GAUSS 00400
- GAUSS 00401 - GAUSS 00500
- GAUSS 00501 - GAUSS 00600
- GAUSS 00601 - GAUSS 00700
- GAUSS 00701 - GAUSS 00800
- GAUSS 00801 - GAUSS 00900
- GAUSS 00901 - GAUSS 01000
- GAUSS 01001 - GAUSS 01100
- GAUSS 01101 - GAUSS 01200
- GAUSS 01201 - GAUSS 01300
- GAUSS 01301 - GAUSS 01400
- GAUSS 01401 - GAUSS 01500
- GAUSS 01501 - GAUSS 01600
- GAUSS 01601 - GAUSS 01700
- GAUSS 01701 - GAUSS 01800
- GAUSS 01801 - GAUSS 01900
- GAUSS 01901 - GAUSS 02000
- GAUSS 02001 - GAUSS 02100
- GAUSS 02101 - GAUSS 02200
- GAUSS 02201 - GAUSS 02300
- GAUSS 02301 - GAUSS 02400
- GAUSS 02401 - GAUSS 02500
- GAUSS 02501 - GAUSS 02600
- GAUSS 02601 - GAUSS 02700
- GAUSS 02701 - GAUSS 02800
- GAUSS 02801 - GAUSS 02900
- GAUSS 02901 - GAUSS 03000
- GAUSS 03001 - GAUSS 03100
- GAUSS 03101 - GAUSS 03200
- GAUSS 03201 - GAUSS 03300
- GAUSS 03301 - GAUSS 03400
- GAUSS 03401 - GAUSS 03500
- GAUSS 03501 - GAUSS 03600
- GAUSS 03601 - GAUSS 03700
- GAUSS 03701 - GAUSS 03800
- GAUSS 03801 - GAUSS 03900
- GAUSS 03901 - GAUSS 04000
- GAUSS 04001 - GAUSS 04100
- GAUSS 04101 - GAUSS 04200
- GAUSS 04201 - GAUSS 04300
- GAUSS 04301 - GAUSS 04400
- GAUSS 04401 - GAUSS 04500
- GAUSS 04501 - GAUSS 04600
- GAUSS 04601 - GAUSS 04700
- GAUSS 04701 - GAUSS 04800
- GAUSS 04801 - GAUSS 04900
- GAUSS 04901 - GAUSS 05000
- GAUSS 05001 - GAUSS 05100
- GAUSS 05101 - GAUSS 05200
- GAUSS 05201 - GAUSS 05300
- GAUSS 05301 - GAUSS 05400
- GAUSS 05401 - GAUSS 05500
- GAUSS 05501 - GAUSS 05600
- GAUSS 05601 - GAUSS 05700
- GAUSS 05701 - GAUSS 05800
- GAUSS 05801 - GAUSS 05900
- GAUSS 05901 - GAUSS 06000
- GAUSS 06001 - GAUSS 06100
- GAUSS 06101 - GAUSS 06200
- GAUSS 06201 - GAUSS 06300
- GAUSS 06301 - GAUSS 06400
- GAUSS 06401 - GAUSS 06500
- GAUSS 06501 - GAUSS 06600
- GAUSS 06601 - GAUSS 06700
- GAUSS 06701 - GAUSS 06800
- GAUSS 06801 - GAUSS 06900
- GAUSS 06901 - GAUSS 07000
- GAUSS 07001 - GAUSS 07100
- GAUSS 07101 - GAUSS 07200
- GAUSS 07201 - GAUSS 07300
- GAUSS 07301 - GAUSS 07400
- GAUSS 07401 - GAUSS 07500
- GAUSS 50000 - GAUSS 50999
- GAUSS 51000 - GAUSS 51999
- GAUSS 52000 - GAUSS 52999
- GAUSS 53000 - GAUSS 53699
- Error Log Reference
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- Common Faults and Identification
- Common Fault Locating Methods
- Common Fault Locating Cases
- Core Fault Locating
- Permission/Session/Data Type Fault Location
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- Standby Node in the Need Repair (WAL) State
- Service Startup Failure
- Primary Node Is Hung in Demoting During a Switchover
- "too many clients already" Is Reported or Threads Failed To Be Created in High Concurrency Scenarios
- Performance Deterioration Caused by Dirty Page Flushing Efficiency During TPCC High Concurrentcy Long Term Stable Running
- A Query Error Is Reported Due to Predicate Pushdown
- Table/Partition Table Fault Location
- File System/Disk/Memory Fault Location
- After You Run the du Command to Query Data File Size In the XFS File System, the Query Result Is Greater than the Actual File Size
- File Is Damaged in the XFS File System
- Insufficient Memory
- "Error:No space left on device" Is Displayed
- When the TPC-C is running and a disk to be injected is full, the TPC-C stops responding
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- Shared Memory Leakage
- SQL Fault Location
- Index Fault Location
- CM Two-Node Fault Location
- Source Code Parsing
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Statistics Information Functions (2)
-
pg_stat_get_backend_waiting(integer)
Description: True if the given server process is waiting for a lock, but only if the current user is a system administrator or the same user as that of the session being queried and track_activities is on
Return type: Boolean
-
pg_stat_get_backend_activity_start(integer)
Description: Specifies the time when the given server process's currently executing query is started only if the current user is the system administrator or the user of the session being queried and track_activities is enabled.
Return type: timestamp with time zone
-
pg_stat_get_backend_xact_start(integer)
Description: Specifies the time when the given server process's currently executing transaction is started only if the current user is the system administrator or the user of the session being queried and track_activities is enabled.
Return type: timestamp with time zone
-
pg_stat_get_backend_start(integer)
Description: Specifies the time when the given server process is started. If the current user is neither the system administrator nor the user of the session being queried, NULL is returned.
Return type: timestamp with time zone
-
pg_stat_get_backend_client_addr(integer)
Description: Specifies the IP address of the client connected to the given server process. If the connection is over a Unix domain socket, or if the current user is neither a system administrator nor the same user as that of the session being queried, NULL will be returned.
Return type: inet
-
pg_stat_get_backend_client_port(integer)
Description: Specifies the TCP port number of the client connected to the given server process. If the connection is over a Unix domain socket, -1 will be returned. If the current user is neither a system administrator nor the same user as that of the session being queried, NULL will be returned.
Return type: integer
-
pg_stat_get_bgwriter_timed_checkpoints()
Description: Specifies the time when the background writer starts scheduled checkpoints (because the checkpoint_timeout time has expired).
Return type: bigint
-
pg_stat_get_bgwriter_requested_checkpoints()
Description: Specifies the time when the background writer starts checkpoints based on requests from the backend because checkpoint_segments has been exceeded or the CHECKPOINT command has been executed.
Return type: bigint
-
pg_stat_get_bgwriter_buf_written_checkpoints()
Description: Specifies the number of buffers written by the background writer during checkpoints.
Return type: bigint
-
pg_stat_get_bgwriter_buf_written_clean()
Description: Specifies the number of buffers written by the background writer for routine cleaning of dirty pages.
Return type: bigint
-
pg_stat_get_bgwriter_maxwritten_clean()
Description: Specifies the time when the background writer stops its cleaning scan because it has written more buffers than specified in the bgwriter_lru_maxpages parameter.
Return type: bigint
-
pg_stat_get_buf_written_backend()
Description: Specifies the number of buffers written by the backend because they need to allocate a new buffer.
Return type: bigint
-
pg_stat_get_buf_alloc()
Description: Specifies the total number of the allocated buffers.
Return type: bigint
-
pg_stat_clear_snapshot()
Description: Discards the current statistics snapshot.
Return type: void
-
pg_stat_reset()
Description: Resets all statistics counters for the current database to zero (requires system administrator permissions).
Return type: void
-
pg_stat_reset_shared(text)
Description: Resets all statistics counters for the current database in each node in a shared cluster to zero (requires system administrator permissions).
Return type: void
-
pg_stat_reset_single_table_counters(oid)
Description: Resets statistics for a single table or index in the current database to zero (requires system administrator permissions).
Return type: void
-
pg_stat_reset_single_function_counters(oid)
Description: Resets statistics for a single function in the current database to zero (requires system administrator permissions).
Return type: void
-
pg_stat_session_cu(int, int, int)
Description: Obtains the compression unit (CU) hit statistics of sessions running on the current node.
Return type: record
-
pg_stat_get_cu_mem_hit(oid)
Description: Obtains the number of CU memory hits of a column storage table in the current database of the current node.
Return type: bigint
-
pg_stat_get_cu_hdd_sync(oid)
Description: Obtains the times CU is synchronously read from a disk by a column storage table in the current database of the current node.
Return type: bigint
-
pg_stat_get_cu_hdd_asyn(oid)
Description: Obtains the times CU is asynchronously read from a disk by a column storage table in the current database of the current node.
Return type: bigint
-
pg_stat_get_db_cu_mem_hit(oid)
Description: Obtains the CU memory hit in a database of the current node.
Return type: bigint
-
pg_stat_get_db_cu_hdd_sync(oid)
Description: Obtains the times CU is synchronously read from a disk by a database of the current node.
Return type: bigint
-
fenced_udf_process(integer)
Description: Shows the number of local UDF Master and Work processes. If the input parameter is set to 1, the number of Master processes is queried. If the input parameter is set to 2, the number of Worker processes is queried. If the input parameter is set to 3, all Worker processes are killed.
Return type: text
-
total_cpu()
Description: Obtains the CPU time used by the current node, in jiffies.
Return type: bigint
-
mot_global_memory_detail()
Description: Checks the size of the MOT global memory, including data and indexes.
Return type: record
-
mot_local_memory_detail()
Description: Checks the size of the MOT local memory, including data and indexes.
Return type: record
-
mot_session_memory_detail()
Description: Checks the MOT memory usage of all sessions.
Return type: record
-
total_memory()
Description: Obtains the size of the virtual memory used by the current node, in KB.
Return type: bigint
-
pg_stat_get_db_cu_hdd_asyn(oid)
Description: Obtains the times CU is asynchronously read from a disk by a database of the current node.
Return type: bigint
-
pg_stat_bad_block(text, int, int, int, int, int, timestamp with time zone, timestamp with time zone)
Description: Obtains damage information about pages or CUs after the current node is started.
Example: select * from pg_stat_bad_block();
Return type: record
-
pg_stat_bad_block_clear()
Description: Deletes the page and CU damage information that is read and recorded on the node (requires system administrator permissions).
Return type: void
-
gs_respool_exception_info(pool text)
Description: Queries the query rule of a specified resource pool.
Return type: record
-
gs_control_group_info(pool text)
Description: Queries information about Cgroups associated with a resource pool.
Return type: record
The command output is as follows:
Attribute Value Description name class_a:workload_a1 Class name and workload name class class_a Class Cgroup name workload workload_a1 Workload Cgroup name type DEFWD Cgroup type (Top, CLASS, BAKWD, DEFWD, and TSWD) gid 87 Cgroup ID shares 30 Percentage of CPU resources to those on the parent node limits 0 Percentage of CPU cores to those on the parent node rate 0 Allocation ratio in Timeshare cpucores 0-3 Number of CPU cores -
gs_all_control_group_info()
Description: Collects information about all Cgroups in the database.
Return type: record
-
gs_get_control_group_info()
Description: Collects information about all Cgroups.
Return type: record
-
get_instr_workload_info(integer)
Description: Obtains the transaction volume and time information on the primary database node.
Return type: record
Attribute Value Description resourcepool_oid 10 OID of the resource pool (the logic is equivalent to the load) commit_counter 4 Number of frontend transactions that were committed rollback_counter 1 Number of frontend transactions that were rolled back resp_min 949 Minimum response time of frontend transactions (unit: μs) resp_max 201891 Maximum response time of frontend transactions (unit: μs) resp_avg 43564 Average response time of frontend transactions (unit: μs) resp_total 217822 Total response time of frontend transactions (unit: μs) bg_commit_counter 910 Number of backend transactions that were committed bg_rollback_counter 0 Number of backend transactions that were rolled back bg_resp_min 97 Minimum response time of backend transactions (unit: μs) bg_resp_max 678080687 Maximum response time of backend transactions (unit: μs) bg_resp_avg 327847884 Average response time of backend transactions (unit: μs) bg_resp_total 298341575300 Total response time of backend transactions (unit: μs) -
pv_instance_time()
Description: Obtains the time consumed in each execution phase on the current node.
Return type: record
Stat_name Attribute Value Description DB_TIME 1062385 Total end-to-end wall time consumed by all threads (unit: μs) CPU_TIME 311777 Total CPU time consumed by all threads (unit: μs) EXECUTION_TIME 380037 Total time consumed on the executor (unit: μs) PARSE_TIME 6033 Total time consumed for parsing SQL statements (unit: μs) PLAN_TIME 173356 Total time consumed for generating an execution plan (unit: μs) REWRITE_TIME 2274 Total time consumed on query rewriting (unit: μs) PL_EXECUTION_TIME 0 Total time consumed for executing PL/SQL statements (unit: μs) PL_COMPILATION_TIME 557 Total time consumed for SQL compilation (unit: μs) NET_SEND_TIME 1673 Total time consumed for sending data over network (unit: μs) DATA_IO_TIME 426622 Total time consumed for data read and write (unit: μs) -
DBE_PERF.get_global_instance_time()
Description: Provides the time consumed in each key phase in MogDB. To query this function, you must have the sysadmin permission.
Return type: record
-
get_instr_unique_sql()
Description: Obtains information about execution statements (normalized SQL statements) on the current node as a user with the sysadmin permission.
Return type: record
-
reset_unique_sql(text, text, bigint)
Description: Resets information about system execution statements (normalized SQL statements) information as a user with the sysadmin permission. The value of the first parameter can be global or local. global indicates that information on all nodes is cleared, and local indicates that only information on the current node is cleared. The value of the second parameter can be ALL, BY_USERID, or BY_CNID. ALL indicates that all information is cleared. BY_USERID indicates that the SQL information of the user specified by USERID is cleared. BY_CNID indicates that the SQL information related to the primary node of the database in the system is cleared. The third parameter indicates CNID and USERID. If the second parameter is set to ALL, the third parameter does not take effect and can be set to any value.
Return type: Boolean
NOTE: This function involves distributed nodes. Currently, MogDB is a centralized database, for which the function of the value global is the same as that of the value local and the second parameter cannot set to be BY_CNID. -
get_instr_wait_event(NULL)
Description: Obtains the statistics on wait events of the current node.
Return type: record
-
get_instr_user_login()
Description: Obtains the number of user login and logout times on the current node. Only users with the sysadmin or monitor admin permission can execute this function.
Return type: record
-
get_instr_rt_percentile(integer)
Description: Obtains the SQL response time P80 and P95 distribution information of the database.
Return type: record
-
get_node_stat_reset_time()
Description: Obtains statistics about reset (restart, primary/standby switchover, and database deletion) time of the current node.
Return type: record
-
DBE_PERF.get_global_os_runtime()
Description: Displays the running status of the current operating system. To query this function, you must have the sysadmin permission.
Return type: record
-
DBE_PERF.get_global_os_threads()
Description: Provides information about the threads under all normal nodes of MogDB. To query this function, you must have the sysadmin permission.
Return type: record
-
DBE_PERF.get_summary_workload_sql_count()
Description: Provides statistics about the number of SELECT, UPDATE, INSERT, DELETE, DDL, DML, and DCL statements of different service loads in MogDB. To query this function, you must have the sysadmin permission.
Return type: record
-
DBE_PERF.get_summary_workload_sql_elapse_time()
Description: Provides statistics about the number of SELECT, UPDATE, INSERT, and DELETE statements and response time information (TOTAL, AVG, MIN, and MAX) for different loads in MogDB. To query this function, you must have the sysadmin permission.
Return type: record
-
DBE_PERF.get_global_workload_transaction()
Description: Obtains the transaction volume and time information on all nodes of MogDB. To query this function, you must have the sysadmin permission.
Return type: record
-
DBE_PERF.get_global_session_stat()
Description: Obtains the session status information on all nodes of MogDB. To query this function, you must have the sysadmin permission.
Return type: record
NOTE: The status information contains the following 17 items: commit, rollback, sql, table_scan, blocks_fetched, physical_read_operation, shared_blocks_dirtied, local_blocks_dirtied, shared_blocks_read, local_blocks_read, blocks_read_time, blocks_write_time, sort_imemory, sort_idisk, cu_mem_hit, cu_hdd_sync_read, and cu_hdd_asyread. -
DBE_PERF.get_global_session_time()
Description: Provides the time consumed in each key phase of each node in MogDB. To query this function, you must have the sysadmin permission.
Return type: record
-
DBE_PERF.get_global_session_memory()
Description: Displays statistics about memory usage at the session level on each node in the unit of MB, including all the memory allocated to Postgres and stream threads on DNs for jobs currently executed by users. To query this function, you must have the sysadmin permission.
Return type: record
-
DBE_PERF.get_global_session_memory_detail()
Description: Displays statistics about thread memory usage on each node by MemoryContext node. To query this function, you must have the sysadmin permission.
Return type: record
-
create_wlm_session_info(int flag)
Description: Clears top SQL query statement-level statistics recorded in the current memory. Only the administrator can execute this function.
Return type: int
-
pg_stat_get_wlm_session_info(int flag)
Description: Obtains top SQL query statement-level statistics recorded in the current memory. If the input parameter is not 0, the information is cleared from the memory. Only users with the system admin or monitor admin permission can execute this function.
Return type: record
-
gs_paxos_stat_replication()
Description: Queries the standby server information on the primary server. Currently, only the centralized DCF mode is supported.
Return type: setofrecord
The following table describes return columns.
Column Type Description local_role text Role of the node that sends logs peer_role text Role of the node that receives logs local_dcf_role text DCF role of the node that sends logs peer_dcf_role text DCF role of the node that receives logs peer_state text Status of the node that receives logs sender_write_location text Location in the Xlog buffer where the node that sends logs is written sender_commit_location text Consistency point reached for the DCF logs of the node that sends logs sender_flush_location text Location in the Xlog disk where the node that sends logs is written sender_replay_location text Location where the node that sends logs replays logs receiver_write_location text Location in the Xlog buffer where the node that receives logs is written receiver_commit_location text Consistency point reached for the DCF logs of the node that receives logs receiver_flush_location text Location in the Xlog disk where the node that receives logs is written receiver_replay_location text Location where the node that receives logs replays Xlogs sync_percent text Synchronization percentage dcf_run_mode int4 DCF synchronization mode channel text Channel information -
gs_wlm_get_resource_pool_info(int)
Description: Obtains resource usage statistics of all users. The input parameter can be any value of the INT type or be null.
Return type: record
-
gs_wlm_get_all_user_resource_info()
Description: Obtains resource usage statistics of all users.
Return type: record
-
gs_wlm_get_user_info(int)
Description: Obtains information about all users. The input parameter can be any value of the INT type or be null. Only users with the sysadmin permission can execute this function.
Return type: record
-
gs_wlm_get_workload_records()
Description: Obtains all job information in dynamic load management. This function is valid only when dynamic load management is enabled.
Return type: record
-
gs_wlm_readjust_user_space()
Description: Corrects the storage space usage of all users. Only the administrator can execute this function.
Return type: record
-
gs_wlm_readjust_user_space_through_username(text name)
Description: Corrects the storage space usage of a specified user. Common users can use this function to modify only their own usage. Only the administrator can modify the usage of all users. If the value of name is 0000, the usage of all users needs to be modified.
Return type: record
-
gs_wlm_readjust_user_space_with_reset_flag(text name, boolean isfirst)
Description: Corrects the storage space usage of a specified user. If the input parameter isfirst is set to true, statistics are collected from 0. Otherwise, statistics are collected from the previous result. Common users can use this function to modify only their own usage. Only the administrator can modify the usage of all users. If the value of name is 0000, the usage of all users needs to be modified.
Return type: record
-
gs_wlm_session_respool(bigint)
Description: Obtains the session resource pool information about all backend threads. The input parameter can be any value of the bigint type or can be null.
Return type: record
-
gs_wlm_get_session_info()
Description: This API has been discarded and is unavailable currently.
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gs_wlm_get_user_session_info()
Description: This API has been discarded and is unavailable currently.
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gs_io_wait_status()
Description: This API does not support single-node systems or centralized systems and is unavailable currently.
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global_stat_get_hotkeys_info()
Description: Obtains the statistics on hot keys in the entire database instance. This API does not support single-node systems or centralized systems and is unavailable currently.
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global_stat_clean_hotkeys()
Description: Clears statistics on hot keys in the entire database instance. This API does not support single-node systems or centralized systems and is unavailable currently.
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DBE_PERF.get_global_session_stat_activity()
Description: Displays information about threads that are running on each node in MogDB. To query this function, you must have the monitoradmin permission.
Return type: record
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DBE_PERF.get_global_thread_wait_status()
Description: Displays the block waiting status of backend threads and auxiliary threads on all nodes. To query this function, you must have the sysadmin or monitoradmin permission.
Return type: record
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DBE_PERF.get_global_operator_history_table()
Description: Displays the operator-related records (persistent) generated after jobs are executed on the primary database node of the current user. To query this function, you must have the sysadmin and monitoradmin permissions.
Return type: record
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DBE_PERF.get_global_operator_history()
Description: Displays the operator-related records generated after jobs are executed on the primary database node of the current user. To query this function, you must have the sysadmin and monitoradmin permissions.
Return type: record
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DBE_PERF.get_global_operator_runtime()
Description: Displays real-time operator-related records of jobs executed on the primary database node of the current user. To query this function, you must have the sysadmin and monitoradmin permissions.
Return type: record
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DBE_PERF.get_global_statement_complex_history()
Description: Displays the historical records of complex queries on the primary database node of the current user. To query this function, you must have the monitoradmin permission.
Return type: record
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DBE_PERF.get_global_statement_complex_history_table()
Description: Displays the historical records (persistent) of complex queries on the primary database node of the current user. To query this function, you must have the monitoradmin permission.
Return type: record
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DBE_PERF.get_global_statement_complex_runtime()
Description: Displays the real-time information of complex queries on the primary database node of the current user. To query this function, you must have the sysadmin or monadmin permission.
Return type: record
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DBE_PERF.get_global_memory_node_detail()
Description: Displays the memory usage of a certain database on all nodes. To query this function, you must have the monitoradmin permission.
Return type: record
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DBE_PERF.get_global_shared_memory_detail()
Description: Displays the usage information about all the shared memory contexts of all nodes. To query this function, you must have the monitoradmin permission.
Return type: record
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DBE_PERF.get_global_statio_all_indexes()
Description: Displays statistics about each index displayed in a row in the current database, showing I/O statistics about accesses to that specific index. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_summary_stat_all_tables()
Description: Displays statistics about a row in each table (including the TOAST table) on each node.
Return type: record
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DBE_PERF.get_global_stat_all_tables()
Description: Displays statistics about a row in each table (including the TOAST table) on each node.
Return type: record
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DBE_PERF.get_local_toastname_and_toastindexname()
Description: Provides the mapping between the name and index of the local TOAST table and its associated table. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_summary_statio_all_indexes()
Description: Collects statistics about each index displayed in a row in the current databases of all nodes and displays the I/O statistics of a specific index. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_all_sequences()
Description: Provides I/O status information about all sequences in the namespace. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_all_tables()
Description: Displays the I/O statistics about each table in databases on each node. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_summary_statio_all_tables()
Description: Collects I/O statistics about each table in databases in MogDB. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_local_toast_relation()
Description: Provides the mapping between the name of the local TOAST table and its associated table. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_sys_indexes()
Description: Displays the I/O status information about all system catalog indexes in namespaces on each node. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_summary_statio_sys_indexes()
Description: Collects the I/O status information about all system catalog indexes in namespaces on each node. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_sys_sequences()
Description: Provides the I/O status information about all the system sequences in the namespace. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_sys_tables()
Description: Provides I/O status information about all system catalogs in namespaces on each node. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_summary_statio_sys_tables()
Description: Displays the I/O status information of all system catalogs in the namespace in MogDB. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_user_indexes()
Description: Displays the I/O status information about all user relationship table indexes in namespaces on each node. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_summary_statio_user_indexes()
Description: Displays the I/O status information about all user relationship table indexes in namespaces in MogDB. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_user_sequences()
Description: Displays the I/O status information about all user sequences in the namespace of each node. To query this function, you must have the sysadmin permission.
Return type: record
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DBE_PERF.get_global_statio_user_tables()
Description: Displays the I/O status information about all user relationship tables in namespaces on each node. To query this function, you must have the sysadmin permission.
Return type: record