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15 lines
558 B
Markdown
15 lines
558 B
Markdown
Statements:
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- WFS adds extra aux columns into projection.
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- WFS sorts using the outer ORDER BY key column list()
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jobInfo.windowDels is used as a temp storage to pass unchanged list of jobInfo.deliveredCols(read as projection list of delivered cols) through WFS if there is no GB/DISTINCT involved.
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GB/DISTINCT can clean the list up on their own.
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This method might implicitly add GB column in case of aggregates over WF and w/o explicit GROUP BY. This is disabled in WFS::AddSimpleColumn
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```SQL
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SELECT min(fist_value(i) partition over i) from tab1;
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```
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