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Provide FORCE_NULL * and FORCE_NOT_NULL * options for COPY FROM

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These options already exist, but you need to specify a column list for
them, which can be cumbersome. We already have the possibility of all
columns for FORCE QUOTE, so this is simply extending that facility to
FORCE_NULL and FORCE_NOT_NULL.

Author: Zhang Mingli
Reviewed-By: Richard Guo, Kyatoro Horiguchi, Michael Paquier.

Discussion: https://postgr.es/m/CACJufxEnVqzOFtqhexF2+AwOKFrV8zHOY3y=p+gPK6eB14pn_w@mail.gmail.com
This commit is contained in:
Andrew Dunstan
2023-09-30 12:34:41 -04:00
parent c181f2e2bc
commit f6d4c9cf16
8 changed files with 103 additions and 12 deletions
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12
src/backend/commands/copy.c
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@ -512,9 +512,11 @@ ProcessCopyOptions(ParseState *pstate,
}
else if (strcmp(defel->defname, "force_not_null") == 0)
{
if (opts_out->force_notnull)
if (opts_out->force_notnull || opts_out->force_notnull_all)
errorConflictingDefElem(defel, pstate);
if (defel->arg && IsA(defel->arg, List))
if (defel->arg && IsA(defel->arg, A_Star))
opts_out->force_notnull_all = true;
else if (defel->arg && IsA(defel->arg, List))
opts_out->force_notnull = castNode(List, defel->arg);
else
ereport(ERROR,
@ -525,9 +527,11 @@ ProcessCopyOptions(ParseState *pstate,
}
else if (strcmp(defel->defname, "force_null") == 0)
{
if (opts_out->force_null)
if (opts_out->force_null || opts_out->force_null_all)
errorConflictingDefElem(defel, pstate);
if (defel->arg && IsA(defel->arg, List))
if (defel->arg && IsA(defel->arg, A_Star))
opts_out->force_null_all = true;
else if (defel->arg && IsA(defel->arg, List))
opts_out->force_null = castNode(List, defel->arg);
else
ereport(ERROR,