BladePipe 1.9.0: New data pipelines, faster Oracle writes, and improved stability.
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PostgreSQL 到 MySQL

选择对端数据库:

数据链路

基本功能

功能说明
Schema Migration

If the target schema does not exist, BladePipe will automatically generate and execute CREATE statements based on the source metadata and the mapping rule.

Full Data Migration

Migrate data by sequentially scanning data in tables and writing it in batches to the target database.

Incremental Data Sync

Sync of common DML like INSERT, UPDATE, DELETE is supported.

Data Verification and Correction

Verify all existing data. Optionally, you can correct the inconsistent data based on verification results. Scheduled DataTasks are supported.
For more information, see Create Verification and Correction DataJob.

Subscription Modification

Add, delete, or modify the subscribed tables with support for historical data migration. For more information, see Modify Subscription.

Table Name Mapping

Support the mapping rules, namely, keeping the name the same as that in Source, converting the text to lowercase, converting the text to uppercase, truncating the name by "_digit" suffix.

DDL Sync

PostgreSQL DDL sync is realized by triggers. The user should have the permissions on triggers and tables. For more information, see Permissions Required for PostgreSQL

Metadata Retrieval

Retrieve the target metadata with filtering conditions from the source table.

高级功能

功能说明
全量前清空目标数据

运行全量任务前清除老数据,包括重跑任务、定时全量迁移都会触发此能力

重建目标表

运行全量任务前重建目标表,包括重跑任务、定时全量迁移都会触发此能力

增量写入冲突策略

IGNORE: 主键冲突则忽略(不做写入),REPLACE: 主键冲突则整行替换

0 值时间处理

支持将 0 值时间设置成不同类型的值,防止写入对端报错

Scheduled Full Data Migration

For more information, see Create Scheduled Full Data DataJob.

Custom Code

For more information, see Custom Code Processing, Debug Custom Code and Logging in Custom Code.

Data Filtering Conditions

Support data filtering using WHERE conditions, with SQL-92 as the SQL language. For more information, see Data Filtering.

Setting Target Primary Key

Change the primary key to another field to facilitate data aggregation and other operations.

Adding Virtual Columns

Support adding custom virtual columns with fixed values, such as region, ID, etc.


源端数据源

前置条件

条件说明
账号权限

需要权限如下(以自建数据库为例):

  • GRANT ALL PRIVILEGES ON DATABASE 同步库 TO 同步账号(或同步库 information_schema 中所有视图的 SELECT 权限和需要同步表、索引、约束的 SELECT 权限)
  • ALTER USER 同步账号 REPLICATION
增量同步准备

准备动作按如下步骤进行:

  • 修改 postgresql.conf, 设置 wal_level=logical 和 wal_log_hints = on
  • 修改 pg_hba.conf, 设置 host replication 同步账号 CIDR网段 md5 , host 同步库 同步账号 CIDR网段 md5, host postgres 同步账号 CIDR网段 md5
  • 重启 PostgreSQL
网络准备

迁移同步节点(sidecar)可连接 PostgreSQL 标准交互接口(如 5432)

任务参数

参数名称说明
fullFetchSize

全量扫描数据设置的 fetch size

eventStoreSize

缓存解析完毕的增量事件缓存大小

ignoreGisSRID

解析 GIS 数据类型时是否忽略 SRID

defaultGisSRID

设置 GIS 数据类型的 SRID

Tips: 通用参数配置请参考 通用参数及功能


目标端数据源

前置条件

条件说明
账号权限

文档:MySQL / MariaDB 需要的权限

网络准备

迁移同步节点(sidecar)可连接 MySQL / MariaDB 标准交互接口(如 3306)

任务参数

参数名称说明
keyConflictStrategy

增量写入遇到主键冲突策略:

  • IGNORE 冲突忽略(默认)
  • REPLACE 冲突替换(可选)

dstWholeReplace

将 INSERT 和 UPDATE 操作变成对端整行覆盖

deCycle

双向同步过滤开关,过滤特定标记的 DML/DDL

specialSqlMode

初始化数据库连接时,可以设置特定的 SQL Mode

defaultGisSRID

设置 GIS 数据类型的 SRID

dstTimeZone

目标端时区,例如 +08:00, Asia/Shanghai, America/New_York等

increParallelApplyStrategy

关系型数据库对端写入数据并行策略:

  • KEY: 以主键进行分区并行写入
  • TABLE: 以表进行分区并行写入
  • KEY_UPGRADE_TABLE: 以主键进行分区并行写入,若有更新唯一键的操作升级为表进行分区写入

Tips: 通用参数配置请参考 通用参数及功能