SAP HANA 到 Doris
| 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. |
Subscription Modification | Add, delete, or modify the subscribed tables with support for historical data migration. For more information, see Modify Subscription. |
Position Resetting | Reset positions by data ID or timestamp. Allow re-consumption of CDC data in a past period. |
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. |
Metadata Retrieval | Retrieve the target metadata with filtering conditions or target primary keys set from the source table. |
高级功能
| 功能 | 说明 |
|---|---|
基于 Trigger 增量同步 | 任务会自动创建表的触发器,触发器能捕获数据的 INSERT / UPDATE / DELETE 事件并写入增量 CDC 数据表 |
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 |
Stream Load 数据写入 | 采用 Stream Load 到 Doris / SelectDB be 写入数据, 默认攒批写入,可动态调节刷出数据节奏和批次大小 |
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 |
Custom Table Properties | Include settings for properties such as bucket count and replica count. |
Setting Data Partitions | When creating a DataJob, specify partition definitions at the table level (static or dynamic). Automatically add these partition definitions during schema migration. |
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. |
限制和注意点
| 限制项 | 说明 |
|---|---|
DDL 变化处理方案 | SAP HANA 源端通过触发器捕获增量数据,不支持 DDL 同步。若发生 DDL 变更,可参考文档:SAP HANA 源端表结构变更 |
HANA 增量同步数据类型 | HANA 增量阶段,触发器不支持捕获 TEXT、BIN_TEXT、ST_POINT、ST_GEOMETRY 类型的数据变更 |
对端表类型 | 仅支持 唯一键模型(Unique) |
源端表类型 | 不支持 无主键表 迁移同步 |
数据类型 | 不支持 BINARY, BLOB 等二进制类型 |
增量写入冲突策略 | Stream Load 写入以主键进行整行替换 |