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8999f5ed3c
Historically, outToken has represented both NULL and empty-string strings as "<>", which readfuncs.c then read as NULL, thus failing to preserve empty-string fields accurately. Remarkably, this has not caused any serious problems yet, but let's fix it. We'll keep the "<>" notation for NULL, and use """" for empty string, because that matches other notational choices already in use. An actual input string of """" is converted to "\""" (this was true already, apparently as a hangover from an ancient time when string quoting was handled directly by pg_strtok). CHAR fields also use "<>", but for '\0'. Author: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://www.postgresql.org/message-id/flat/4159834.1657405226@sss.pgh.pa.us |
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