- Release Notes and Announcements
- Product Introduction
- Purchase Guide
- Getting Started
- Preparations
- Business Evaluation
- Network Preparation
- DTS Service Permission Preparation
- Database and Permission Preparation
- Configuring Binlog in Self-Built MySQL
- Data Migration
- Databases Supported by Data Migration
- Cross-Account TencentDB Instance Migration
- Migration to MySQL Series
- Migrating to MySQL
- Migrating to MariaDB
- Migrating to TDSQL-C for MySQL
- Migrating to TDSQL MySQL
- Migrating to TDSQL TDStore
- Advanced Operations for MySQL Series Migration
- Processing for MySQL Series Pre-Check Failure
- Database Connection Check
- Peripheral Check
- Version Check
- Source Instance Permission Check
- Partial Database Parameter Check
- Target Instance Permission Check
- Target Database Content Conflict Check
- Target Database Space Check
- Binlog Parameter Check
- Foreign Key Dependency Check
- View Check
- Advanced Object Check
- Warning Item Check
- TDSQL Proxy Check
- TDSQL Kernel Check
- DDL Ring Linkage Synchronization Detection for Same Database and Table Objects
- DDL Synchronization Conflict Detection for the Same Target and Same Database and Table Object
- Offline Migration of MySQL Data
- Migrating to PostgreSQL
- Migration from PostgreSQL to TencentDB for PostgreSQL
- Migration from TDSQL-C PostgreSQL to TencentDB for PostgreSQL
- PostgreSQL Physical Migration
- Processing for PostgreSQL Series Pre-Check Failure
- Database Connection Check
- Object Dependency Check
- Version Check
- Source or Target Instance Permission Check
- Incremental Migration Pre Check
- Structural Compatibility Check
- Structural Conflict Check
- Account Conflict Check
- Parameter Configuration Conflict Check
- Plugin Compatibility Check
- Multi Task Conflict Detection
- Long Transaction Check
- Migrating to MongoDB
- Migration from MongoDB to MongoDB
- Fix for Verification Failure
- MongoDB Connection Check
- Database/Table Content Conflict Check
- Source Database Node Role Check
- Oplog Check
- Source/Target Database Account Permission Check
- Database Version Check
- Database Capacity Check
- Target Database Load Check
- ShardKey Check
- Source Database Balancer Check
- Time Series Collection Verification
- Compression Algorithm Verification
- MongoDB Data Consistency Verification
- Migrating to SQL Server
- Migrating to TencentDB for Redis
- Migrating to KeeWiDB
- Task Management
- Task Status Description
- Viewing Task
- Configuring Task
- Verifying Task
- Start Task
- Retrying Task (MySQL)
- Retrying Task (Redis)
- Speed Limit (MySQL)
- Speed Limit (Redis)
- Complete Task
- Terminating Task
- Deleting Task
- Pausing Task
- Resuming Task
- Changing Configuration
- Terminating Task
- Deisolating Task
- Deleting Task
- Managing Tag
- Creating a Similar Task
- Viewing Log
- Data Sync
- Databases Supported by Data Sync
- Cross-Account TencentDB Instance Sync
- Sync to MySQL series
- Sync to MySQL
- Sync to MariaDB
- Sync to TDSQL-C for MySQL
- Sync to TDSQL for MySQL
- Sync to TDSQL TDStore
- MySQL Series Advanced Sync Operations
- MySQL series Pre Validation Failed Processing
- Database Connection Check
- Peripheral Check
- Version Check
- Source Instance Permission Check
- Partial Database Parameter Check
- Target Database Content Conflict Check
- Target Database Space Check
- Binlog Parameter Check
- Foreign Key Dependency Check
- View Check
- Advanced Object Check
- Warning Item Check
- TDSQL Proxy Check
- TDSQL kernel check
- DLL Ring Sync Check for Single Database/Table Object
- DLL Sync Conflict Check for Single Database/Table Object in the Same Target
- Synchronize to PostgreSQL
- Synchronization from PostgreSQL to PostgreSQL
- PostgreSQL Pre Validation does not Pass Processing
- Database Connection Check
- Object Dependency Check
- Version Check
- Source or Target Instance Permission Check
- Incremental Migration Pre Check
- Structural Compatibility Check
- Structural Conflict Check
- Account Conflict Check
- Parameter Configuration Conflict Check
- Plugin Compatibility Check
- Primary Key Dependency Check
- Check the Key Parameters of the Instance
- Multi Task Conflict Detection
- Synchronize to Kafka
- Task Management
- Task Status Description
- Viewing Task
- Configuring Task
- Verifying Task
- Starting Task
- Retrying Task (MySQL)
- Speed Limit
- Stopping Task
- Modify Sync configuration
- Pausing Task
- Resuming Task
- Resetting Task
- Deleting Task
- Changing Configuration
- Pay-as-You-Go to Monthly Subscription
- Terminating/Returning Instance
- Renewing Task
- Deisolating Task
- Deleting Instance
- Creating a Similar Task
- Viewing Log
- Deleting Task
- Data Subscription (Kafka Edition)
- Databases Supported by Data Subscription
- MySQL series Data Subscription
- Creating MySQL or TDSQL for MySQL Data Subscription
- Creating TDSQL for MySQL Data Subscription
- Creating MariaDB/Percona Data Subscription
- Consuming MySQL Data
- Advanced Subscription Operations
- Fix for Verification Failure
- Data Subscription for TDSQL PostgreSQL
- MongoDB Data Subscription
- Task Management
- Consumption Management
- Fix for Verification Failure
- Cutover Description
- Monitoring and Alarms
- Ops Management
- Practical Tutorial
- Synchronizing Local Database to the Cloud
- Creating Two-Way Sync Data Structure
- Creating Many-to-One Sync Data Structure
- Creating Multi-Site Active-Active IDC Architecture
- Selecting Data Sync Conflict Resolution Policy
- Using CLB as Proxy for Cross-Account Database Migration
- Migrating Self-Built Databases to Tencent Cloud Databases via CCN
- Best Practices for DTS Performance Tuning
- FAQs
- Error Handling
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- (NewDTS) Data Migration APIs
- DescribeMigrationJobs
- ModifyMigrationJob
- CompleteMigrateJob
- DescribeMigrationDetail
- CreateMigrationService
- CreateMigrateCheckJob
- DescribeMigrationCheckJob
- SkipCheckItem
- StartMigrateJob
- StopMigrateJob
- ResumeMigrateJob
- RecoverMigrateJob
- ModifyMigrateName
- ModifyMigrateJobSpec
- IsolateMigrateJob
- DestroyMigrateJob
- DescribeMigrateDBInstances
- PauseMigrateJob
- ContinueMigrateJob
- Data Sync APIs
- DescribeSyncJobs
- ModifySyncJobConfig
- CreateModifyCheckSyncJob
- DescribeModifyCheckSyncJobResult
- StartModifySyncJob
- CreateSyncJob
- ConfigureSyncJob
- CreateCheckSyncJob
- SkipSyncCheckItem
- DescribeCheckSyncJobResult
- StartSyncJob
- StopSyncJob
- ResumeSyncJob
- ResizeSyncJob
- RecoverSyncJob
- IsolateSyncJob
- DestroySyncJob
- PauseSyncJob
- ContinueSyncJob
- Data Consistency Check APIs
- Data Types
- Error Codes
- DTS API 2018-03-30
- SDK Documentation
- Service Agreement
- Release Notes and Announcements
- Product Introduction
- Purchase Guide
- Getting Started
- Preparations
- Business Evaluation
- Network Preparation
- DTS Service Permission Preparation
- Database and Permission Preparation
- Configuring Binlog in Self-Built MySQL
- Data Migration
- Databases Supported by Data Migration
- Cross-Account TencentDB Instance Migration
- Migration to MySQL Series
- Migrating to MySQL
- Migrating to MariaDB
- Migrating to TDSQL-C for MySQL
- Migrating to TDSQL MySQL
- Migrating to TDSQL TDStore
- Advanced Operations for MySQL Series Migration
- Processing for MySQL Series Pre-Check Failure
- Database Connection Check
- Peripheral Check
- Version Check
- Source Instance Permission Check
- Partial Database Parameter Check
- Target Instance Permission Check
- Target Database Content Conflict Check
- Target Database Space Check
- Binlog Parameter Check
- Foreign Key Dependency Check
- View Check
- Advanced Object Check
- Warning Item Check
- TDSQL Proxy Check
- TDSQL Kernel Check
- DDL Ring Linkage Synchronization Detection for Same Database and Table Objects
- DDL Synchronization Conflict Detection for the Same Target and Same Database and Table Object
- Offline Migration of MySQL Data
- Migrating to PostgreSQL
- Migration from PostgreSQL to TencentDB for PostgreSQL
- Migration from TDSQL-C PostgreSQL to TencentDB for PostgreSQL
- PostgreSQL Physical Migration
- Processing for PostgreSQL Series Pre-Check Failure
- Database Connection Check
- Object Dependency Check
- Version Check
- Source or Target Instance Permission Check
- Incremental Migration Pre Check
- Structural Compatibility Check
- Structural Conflict Check
- Account Conflict Check
- Parameter Configuration Conflict Check
- Plugin Compatibility Check
- Multi Task Conflict Detection
- Long Transaction Check
- Migrating to MongoDB
- Migration from MongoDB to MongoDB
- Fix for Verification Failure
- MongoDB Connection Check
- Database/Table Content Conflict Check
- Source Database Node Role Check
- Oplog Check
- Source/Target Database Account Permission Check
- Database Version Check
- Database Capacity Check
- Target Database Load Check
- ShardKey Check
- Source Database Balancer Check
- Time Series Collection Verification
- Compression Algorithm Verification
- MongoDB Data Consistency Verification
- Migrating to SQL Server
- Migrating to TencentDB for Redis
- Migrating to KeeWiDB
- Task Management
- Task Status Description
- Viewing Task
- Configuring Task
- Verifying Task
- Start Task
- Retrying Task (MySQL)
- Retrying Task (Redis)
- Speed Limit (MySQL)
- Speed Limit (Redis)
- Complete Task
- Terminating Task
- Deleting Task
- Pausing Task
- Resuming Task
- Changing Configuration
- Terminating Task
- Deisolating Task
- Deleting Task
- Managing Tag
- Creating a Similar Task
- Viewing Log
- Data Sync
- Databases Supported by Data Sync
- Cross-Account TencentDB Instance Sync
- Sync to MySQL series
- Sync to MySQL
- Sync to MariaDB
- Sync to TDSQL-C for MySQL
- Sync to TDSQL for MySQL
- Sync to TDSQL TDStore
- MySQL Series Advanced Sync Operations
- MySQL series Pre Validation Failed Processing
- Database Connection Check
- Peripheral Check
- Version Check
- Source Instance Permission Check
- Partial Database Parameter Check
- Target Database Content Conflict Check
- Target Database Space Check
- Binlog Parameter Check
- Foreign Key Dependency Check
- View Check
- Advanced Object Check
- Warning Item Check
- TDSQL Proxy Check
- TDSQL kernel check
- DLL Ring Sync Check for Single Database/Table Object
- DLL Sync Conflict Check for Single Database/Table Object in the Same Target
- Synchronize to PostgreSQL
- Synchronization from PostgreSQL to PostgreSQL
- PostgreSQL Pre Validation does not Pass Processing
- Database Connection Check
- Object Dependency Check
- Version Check
- Source or Target Instance Permission Check
- Incremental Migration Pre Check
- Structural Compatibility Check
- Structural Conflict Check
- Account Conflict Check
- Parameter Configuration Conflict Check
- Plugin Compatibility Check
- Primary Key Dependency Check
- Check the Key Parameters of the Instance
- Multi Task Conflict Detection
- Synchronize to Kafka
- Task Management
- Task Status Description
- Viewing Task
- Configuring Task
- Verifying Task
- Starting Task
- Retrying Task (MySQL)
- Speed Limit
- Stopping Task
- Modify Sync configuration
- Pausing Task
- Resuming Task
- Resetting Task
- Deleting Task
- Changing Configuration
- Pay-as-You-Go to Monthly Subscription
- Terminating/Returning Instance
- Renewing Task
- Deisolating Task
- Deleting Instance
- Creating a Similar Task
- Viewing Log
- Deleting Task
- Data Subscription (Kafka Edition)
- Databases Supported by Data Subscription
- MySQL series Data Subscription
- Creating MySQL or TDSQL for MySQL Data Subscription
- Creating TDSQL for MySQL Data Subscription
- Creating MariaDB/Percona Data Subscription
- Consuming MySQL Data
- Advanced Subscription Operations
- Fix for Verification Failure
- Data Subscription for TDSQL PostgreSQL
- MongoDB Data Subscription
- Task Management
- Consumption Management
- Fix for Verification Failure
- Cutover Description
- Monitoring and Alarms
- Ops Management
- Practical Tutorial
- Synchronizing Local Database to the Cloud
- Creating Two-Way Sync Data Structure
- Creating Many-to-One Sync Data Structure
- Creating Multi-Site Active-Active IDC Architecture
- Selecting Data Sync Conflict Resolution Policy
- Using CLB as Proxy for Cross-Account Database Migration
- Migrating Self-Built Databases to Tencent Cloud Databases via CCN
- Best Practices for DTS Performance Tuning
- FAQs
- Error Handling
- API Documentation
- History
- Introduction
- API Category
- Making API Requests
- (NewDTS) Data Migration APIs
- DescribeMigrationJobs
- ModifyMigrationJob
- CompleteMigrateJob
- DescribeMigrationDetail
- CreateMigrationService
- CreateMigrateCheckJob
- DescribeMigrationCheckJob
- SkipCheckItem
- StartMigrateJob
- StopMigrateJob
- ResumeMigrateJob
- RecoverMigrateJob
- ModifyMigrateName
- ModifyMigrateJobSpec
- IsolateMigrateJob
- DestroyMigrateJob
- DescribeMigrateDBInstances
- PauseMigrateJob
- ContinueMigrateJob
- Data Sync APIs
- DescribeSyncJobs
- ModifySyncJobConfig
- CreateModifyCheckSyncJob
- DescribeModifyCheckSyncJobResult
- StartModifySyncJob
- CreateSyncJob
- ConfigureSyncJob
- CreateCheckSyncJob
- SkipSyncCheckItem
- DescribeCheckSyncJobResult
- StartSyncJob
- StopSyncJob
- ResumeSyncJob
- ResizeSyncJob
- RecoverSyncJob
- IsolateSyncJob
- DestroySyncJob
- PauseSyncJob
- ContinueSyncJob
- Data Consistency Check APIs
- Data Types
- Error Codes
- DTS API 2018-03-30
- SDK Documentation
- Service Agreement
Check Details
Check requirements: check the following parameter values of the source and target databases. If a parameter has different values in the source database and target database, a verification warning will be reported, which will not block the migration task but will affect the business. You need to assess and determine whether to modify the parameter.
TimeZone, lc_monetary, lc_numeric, array_nulls, server_encoding, DateStyle, extra_float_digits, gin_fuzzy_search_limit, xmlbinary, and constraint_exclusion.
Impact on the business: if the parameter values are different, data inconsistency between the source and target databases may be caused. Below is the specific impact:
TimeZone: sets the instance time zone. If this parameter has different values, data may be incorrect after migration.
lc_monetary: sets the instance currency mode. If this parameter has different values, currency numbers may be incorrect after migration.
lc_numeric: sets the instance numeric mode. If this parameter has different values, data may be incorrect after migration.
array_nulls: sets whether arrays can be empty. If this parameter has different values, data inconsistency may occur, and certain data may fail to be migrated.
server_encoding: sets the instance character set. If this parameter has different values, garbled characters may be present in the stored data.
DateStyle: sets the date format. If this parameter has different values, data migration may fail.
extra_float_digits: sets the floating-point value output precision. If this parameter has values, data precision will be affected. In high-precision database use cases, data inconsistency will occur after migration.
gin_fuzzy_search_limit: sets the upper limit of the size of the set returned by the GIN index. If this parameter has different values, data display inconsistency will occur after migration.
xmlbinary: sets the XML function conversion result. If this parameter has different values, function execution in the target database may be different from that in the source database.
constraint_exclusion: sets whether the restraints take effect. If this parameter has different values, data inconsistency may occur after migration.
Fix
1. Log in to the source database with the
superuser account.2. Run the following sample statements to modify the corresponding parameters:
You can choose to first modify the parameters in the source database. If such parameters cannot be modified, you need to modify them in the target database by submitting a ticket.
The
server_encoding parameter cannot be modified in the source database. If it is exceptional, check whether it has been created in the target database, and if so and it is different from that in the source database, you need to apply for a new instance; and if not, modify it as follows (currently, TencentDB instances only support two character sets: UTF-8 and LATIN):alter system set timezone='parameter value';alter system set lc_monetary='parameter value';alter system set lc_numeric='parameter value';
Yes
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