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Make USING and WITH optional to bring the syntax of \copy into exact

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agreement with what the backend grammar actually accepts (which is a
bit looser than what its documentation claims).  Per report from Bill
Moran, though I did not use his patch since it removed all the
undocumented flexibility that the code historically had and the backend
still has.
This commit is contained in:
Tom Lane 2004-01-28 22:14:04 +00:00
parent 2f0d43b251
commit 18f9d7c74e
1 changed files with 33 additions and 9 deletions
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42
src/bin/psql/copy.c
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@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2003, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.40 2004/01/26 22:35:32 tgl Exp $
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.41 2004/01/28 22:14:04 tgl Exp $
*/
#include "postgres_fe.h"
#include "copy.h"
@ -36,11 +36,19 @@
* parse_slash_copy
* -- parses \copy command line
*
* Accepted syntax: \copy table [(columnlist)] [with oids] from|to filename [with ] [ oids ] [ delimiter char] [ null as string ]
* The documented preferred syntax is:
* \copy tablename [(columnlist)] from|to filename
* [ with ] [ oids ] [ delimiter [as] char ] [ null [as] string ]
* (binary is not here yet)
*
* Old syntax for backward compatibility: (2002-06-19):
* \copy table [(columnlist)] [with oids] from|to filename [ using delimiters char] [ with null as string ]
* The pre-7.3 syntax was:
* \copy tablename [(columnlist)] [with oids] from|to filename
* [ [using] delimiters char ] [ with null as string ]
*
* The actual accepted syntax is a rather unholy combination of these,
* plus some undocumented flexibility (for instance, the clauses after
* WITH can appear in any order). The accepted syntax matches what
* the backend grammar actually accepts (see backend/parser/gram.y).
*
* table name can be double-quoted and can have a schema part.
* column names can be double-quoted.
@ -243,6 +251,9 @@ parse_slash_copy(const char *args)
0, false, pset.encoding);
if (!(token && strcasecmp(token, "delimiters") == 0))
goto error;
}
if (token && strcasecmp(token, "delimiters") == 0)
{
token = strtokx(NULL, whitespace, NULL, "'",
'\\', false, pset.encoding);
if (!token)
@ -254,12 +265,22 @@ parse_slash_copy(const char *args)
if (token)
{
if (strcasecmp(token, "with") != 0)
goto error;
while ((token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding)) != NULL)
/*
* WITH is optional. Also, the backend will allow WITH followed by
* nothing, so we do too.
*/
if (strcasecmp(token, "with") == 0)
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
while (token)
{
if (strcasecmp(token, "delimiter") == 0)
/* someday allow BINARY here */
if (strcasecmp(token, "oids") == 0)
{
result->oids = true;
}
else if (strcasecmp(token, "delimiter") == 0)
{
token = strtokx(NULL, whitespace, NULL, "'",
'\\', false, pset.encoding);
@ -285,6 +306,9 @@ parse_slash_copy(const char *args)
}
else
goto error;
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
}
}