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An initial Obsidian vault as a knowledge base.
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docs/WFS_makeWindowFunctionStep.md
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docs/WFS_makeWindowFunctionStep.md
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WFS adds extra columns into RG that must be removed after WFS. There is a block here that restores the original deliveredCols only there is no DISTINCT or GROUP BY b/c DISTINCT/GB does a similar filtering modifying jobInfo.distinctColVec.
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[[WFS_initialize]]
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