add: csv_read function - #14
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The `csv_read(anyelement, text)` function can read inline text values, respecting quoting and escaping inside quotes. ```sql select id, name from csv_read(null::projects, E'1,IOS,4\n2,"Win""dows",4') where id = 2; id | name ----+---------- 2 | Win"dows ``` This allows for greater flexibility, csv_read can be combined with pg_read_file, inserts, limit/offset, etc. Notes ----- - For performance it uses SIMD parsing (via cparsec.h, which uses memchr) and avoids pallocing in the hot path (see `csv_slice_to_cstr`, which is a bit of a trick). - Performance is checked by comparing to COPY CSV, this is included in the bench tests.
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The
csv_read(anyelement, text)function can read inline text values, respecting quoting and escaping inside quotes.This allows for greater flexibility, csv_read can be combined with pg_read_file, inserts, limit/offset, etc.
Notes
csv_slice_to_cstr, which is a bit of a trick).