Add a flag to restore old CSV import behaviour #605
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mildbyte
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Jan 5, 2022
When using `sgr csv import`, we load data using `COPY FROM STDIN` which doesn't let us treat empty strings as NULLs, whereas with the CSV FDW we can do that. To get around this, we use the empty strings in the type inference in the former case (so that integer columns with empty strings still end up as VARCHARs).
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See 65e9d43#commitcomment-62867837 for context