How traditional query execution engines work I will quickly go into the Volcano execution model. Almost all traditional and modern Systems use it or some variation
Bloat & bytecode from 1987 AD
。关于这个话题，im钱包官方下载提供了深入分析
Browse the implementors of #beVariable message and you will find other filters under BPatternVariableNode class, such as #beInstVar or #beLocalVar. If you miss something, just add a method. No new syntax required.
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