Better UNION handling in the compile and optimization phase of the access plan.
在访问计划的编译和优化阶段提供更好的UNION处理。
The advantage of compiled phase and run phase compile only once in the whole process.
编译阶段和运行阶段分开的好处使得整个过程只编译一次。
The advantage of compiled phase and run phase compile only once in the whole process.
编译阶段和运行阶段分开的好处使得整个过程只编译一次。
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