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Add error about the use of FREEZE in COPY TO

Browse Source 
Also clarify some other error wording.

Reported-by: Kyotaro Horiguchi

Discussion: https://postgr.es/m/20220802.133046.1941977979333284049.horikyota.ntt@gmail.com

Backpatch-through: master
This commit is contained in:
Bruce Momjian
2023-11-13 12:53:03 -05:00
parent 103ed24e31
commit acc95f29ef
3 changed files with 26 additions and 19 deletions
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1
doc/src/sgml/ref/copy.sgml
View File

@@ -224,6 +224,7 @@ COPY { <replaceable class="parameter">table_name</replaceable> [ ( <replaceable
open and there are no older snapshots held by this transaction. It is
currently not possible to perform a <command>COPY FREEZE</command> on
a partitioned table.
This option is only allowed in <command>COPY FROM</command>.
</para>
<para>
Note that all other sessions will immediately be able to see the data

32
src/backend/commands/copy.c
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@@ -671,7 +671,7 @@ ProcessCopyOptions(ParseState *pstate,
if (!opts_out->csv_mode && opts_out->quote != NULL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY quote available only in CSV mode")));
errmsg("COPY QUOTE requires CSV mode")));
if (opts_out->csv_mode && strlen(opts_out->quote) != 1)
ereport(ERROR,
@@ -687,7 +687,7 @@ ProcessCopyOptions(ParseState *pstate,
if (!opts_out->csv_mode && opts_out->escape != NULL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY escape available only in CSV mode")));
errmsg("COPY ESCAPE requires CSV mode")));
if (opts_out->csv_mode && strlen(opts_out->escape) != 1)
ereport(ERROR,
@@ -698,46 +698,52 @@ ProcessCopyOptions(ParseState *pstate,
if (!opts_out->csv_mode && (opts_out->force_quote || opts_out->force_quote_all))
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force quote available only in CSV mode")));
errmsg("COPY FORCE_QUOTE requires CSV mode")));
if ((opts_out->force_quote || opts_out->force_quote_all) && is_from)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force quote only available using COPY TO")));
errmsg("COPY FORCE_QUOTE cannot be used with COPY FROM")));
/* Check force_notnull */
if (!opts_out->csv_mode && opts_out->force_notnull != NIL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force not null available only in CSV mode")));
errmsg("COPY FORCE_NOT_NULL requires CSV mode")));
if (opts_out->force_notnull != NIL && !is_from)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force not null only available using COPY FROM")));
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("COPY FORCE_NOT_NULL cannot be used with COPY TO")));
/* Check force_null */
if (!opts_out->csv_mode && opts_out->force_null != NIL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force null available only in CSV mode")));
errmsg("COPY FORCE_NULL requires CSV mode")));
if (opts_out->force_null != NIL && !is_from)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY force null only available using COPY FROM")));
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("COPY FORCE_NULL cannot be used with COPY TO")));
/* Don't allow the delimiter to appear in the null string. */
if (strchr(opts_out->null_print, opts_out->delim[0]) != NULL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
errmsg("COPY delimiter must not appear in the NULL specification")));
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("COPY delimiter character must not appear in the NULL specification")));
/* Don't allow the CSV quote char to appear in the null string. */
if (opts_out->csv_mode &&
strchr(opts_out->null_print, opts_out->quote[0]) != NULL)
ereport(ERROR,
(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("CSV quote character must not appear in the NULL specification")));
/* Check freeze */
if (opts_out->freeze && !is_from)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("COPY FREEZE cannot be used with COPY TO")));
if (opts_out->default_print)
{
if (!is_from)

12
src/test/regress/expected/copy2.out
View File

@@ -83,17 +83,17 @@ ERROR: cannot specify DELIMITER in BINARY mode
COPY x to stdin (format BINARY, null 'x');
ERROR: cannot specify NULL in BINARY mode
COPY x to stdin (format TEXT, force_quote(a));
ERROR: COPY force quote available only in CSV mode
ERROR: COPY FORCE_QUOTE requires CSV mode
COPY x from stdin (format CSV, force_quote(a));
ERROR: COPY force quote only available using COPY TO
ERROR: COPY FORCE_QUOTE cannot be used with COPY FROM
COPY x to stdout (format TEXT, force_not_null(a));
ERROR: COPY force not null available only in CSV mode
ERROR: COPY FORCE_NOT_NULL requires CSV mode
COPY x to stdin (format CSV, force_not_null(a));
ERROR: COPY force not null only available using COPY FROM
ERROR: COPY FORCE_NOT_NULL cannot be used with COPY TO
COPY x to stdout (format TEXT, force_null(a));
ERROR: COPY force null available only in CSV mode
ERROR: COPY FORCE_NULL requires CSV mode
COPY x to stdin (format CSV, force_null(a));
ERROR: COPY force null only available using COPY FROM
ERROR: COPY FORCE_NULL cannot be used with COPY TO
-- too many columns in column list: should fail
COPY x (a, b, c, d, e, d, c) from stdin;
ERROR: column "d" specified more than once