// 右侧第一个 <= cur 的元素, 所以用大于的就弹出
TransformStream creates a readable/writable pair with processing logic in between. The transform() function executes on write, not on read. Processing of the transform happens eagerly as data arrives, regardless of whether any consumer is ready. This causes unnecessary work when consumers are slow, and the backpressure signaling between the two sides has gaps that can cause unbounded buffering under load. The expectation in the spec is that the producer of the data being transformed is paying attention to the writer.ready signal on the writable side of the transform but quite often producers just simply ignore it.
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平台支持全量数据迁移与增量同步，基于 Flink CDC 实现低延迟实时入湖。同时自动完成 DDL 转换、表结构映射与元数据同步，并内置数据校验机制，确保数据完整性与一致性，满足企业级合规要求。
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