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提交 87e8014d 编写于 作者: T Tom Lane
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Respond to Jeremy Drake's original gripe that \copy needs to recognize 

E'...' syntax for strings in order to track the backend.
上级 6178762f
隐藏空白更改
内联 并排
Showing with 75 addition and 78 deletion
src/bin/psql/copy.c
浏览文件 @ 87e8014d
......@@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.63 2006/06/01 00:15:36 tgl Exp $
* $PostgreSQL: pgsql/src/bin/psql/copy.c,v 1.64 2006/06/01 01:28:00 tgl Exp $
*/
#include "postgres_fe.h"
#include "copy.h"
......@@ -127,7 +127,7 @@ parse_slash_copy(const char *args)
result = pg_calloc(1, sizeof(struct copy_options));
token = strtokx(line, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
......@@ -135,7 +135,7 @@ parse_slash_copy(const char *args)
{
result->binary = true;
token = strtokx(NULL, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
}
......@@ -143,7 +143,7 @@ parse_slash_copy(const char *args)
result->table = pg_strdup(token);
token = strtokx(NULL, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
......@@ -156,12 +156,12 @@ parse_slash_copy(const char *args)
/* handle schema . table */
xstrcat(&result->table, token);
token = strtokx(NULL, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
xstrcat(&result->table, token);
token = strtokx(NULL, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
}
......@@ -173,12 +173,12 @@ parse_slash_copy(const char *args)
for (;;)
{
token = strtokx(NULL, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token || strchr(".,()", token[0]))
goto error;
xstrcat(&result->column_list, token);
token = strtokx(NULL, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
xstrcat(&result->column_list, token);
......@@ -188,7 +188,7 @@ parse_slash_copy(const char *args)
goto error;
}
token = strtokx(NULL, whitespace, ".,()", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
}
......@@ -199,13 +199,13 @@ parse_slash_copy(const char *args)
if (pg_strcasecmp(token, "with") == 0)
{
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token || pg_strcasecmp(token, "oids") != 0)
goto error;
result->oids = true;
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token)
goto error;
}
......@@ -218,7 +218,7 @@ parse_slash_copy(const char *args)
goto error;
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, true, pset.encoding);
0, false, true, pset.encoding);
if (!token)
goto error;
......@@ -242,7 +242,7 @@ parse_slash_copy(const char *args)
}
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
0, false, false, pset.encoding);
/*
* Allows old COPY syntax for backward compatibility 2002-06-19
......@@ -250,19 +250,19 @@ parse_slash_copy(const char *args)
if (token && pg_strcasecmp(token, "using") == 0)
{
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!(token && pg_strcasecmp(token, "delimiters") == 0))
goto error;
}
if (token && pg_strcasecmp(token, "delimiters") == 0)
{
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (!token)
goto error;
result->delim = pg_strdup(token);
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
0, false, false, pset.encoding);
}
if (token)
......@@ -273,7 +273,7 @@ parse_slash_copy(const char *args)
*/
if (pg_strcasecmp(token, "with") == 0)
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
0, false, false, pset.encoding);
while (token)
{
......@@ -292,10 +292,10 @@ parse_slash_copy(const char *args)
else if (pg_strcasecmp(token, "delimiter") == 0)
{
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token && pg_strcasecmp(token, "as") == 0)
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token)
result->delim = pg_strdup(token);
else
......@@ -304,10 +304,10 @@ parse_slash_copy(const char *args)
else if (pg_strcasecmp(token, "null") == 0)
{
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token && pg_strcasecmp(token, "as") == 0)
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token)
result->null = pg_strdup(token);
else
......@@ -316,10 +316,10 @@ parse_slash_copy(const char *args)
else if (pg_strcasecmp(token, "quote") == 0)
{
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token && pg_strcasecmp(token, "as") == 0)
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token)
result->quote = pg_strdup(token);
else
......@@ -328,10 +328,10 @@ parse_slash_copy(const char *args)
else if (pg_strcasecmp(token, "escape") == 0)
{
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token && pg_strcasecmp(token, "as") == 0)
token = strtokx(NULL, whitespace, NULL, "'",
nonstd_backslash, false, pset.encoding);
nonstd_backslash, true, false, pset.encoding);
if (token)
result->escape = pg_strdup(token);
else
......@@ -340,7 +340,7 @@ parse_slash_copy(const char *args)
else if (pg_strcasecmp(token, "force") == 0)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (pg_strcasecmp(token, "quote") == 0)
{
/* handle column list */
......@@ -348,7 +348,7 @@ parse_slash_copy(const char *args)
for (;;)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token || strchr(",", token[0]))
goto error;
if (!result->force_quote_list)
......@@ -356,7 +356,7 @@ parse_slash_copy(const char *args)
else
xstrcat(&result->force_quote_list, token);
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token || token[0] != ',')
break;
xstrcat(&result->force_quote_list, token);
......@@ -365,7 +365,7 @@ parse_slash_copy(const char *args)
else if (pg_strcasecmp(token, "not") == 0)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (pg_strcasecmp(token, "null") != 0)
goto error;
/* handle column list */
......@@ -373,7 +373,7 @@ parse_slash_copy(const char *args)
for (;;)
{
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token || strchr(",", token[0]))
goto error;
if (!result->force_notnull_list)
......@@ -381,7 +381,7 @@ parse_slash_copy(const char *args)
else
xstrcat(&result->force_notnull_list, token);
token = strtokx(NULL, whitespace, ",", "\"",
0, false, pset.encoding);
0, false, false, pset.encoding);
if (!token || token[0] != ',')
break;
xstrcat(&result->force_notnull_list, token);
......@@ -395,7 +395,7 @@ parse_slash_copy(const char *args)
if (fetch_next)
token = strtokx(NULL, whitespace, NULL, NULL,
0, false, pset.encoding);
0, false, false, pset.encoding);
}
}
......@@ -415,6 +415,22 @@ error:
}
/*
* Handle one of the "string" options of COPY. If the user gave a quoted
* string, pass it to the backend as-is; if it wasn't quoted then quote
* and escape it.
*/
static void
emit_copy_option(PQExpBuffer query, const char *keyword, const char *option)
{
appendPQExpBufferStr(query, keyword);
if (option[0] == '\'' ||
((option[0] == 'E' || option[0] == 'e') && option[1] == '\''))
appendPQExpBufferStr(query, option);
else
appendStringLiteralConn(query, option, pset.db);
}
/*
* Execute a \copy command (frontend copy). We have to open a file, then
......@@ -462,29 +478,11 @@ do_copy(const char *args)
/* Uses old COPY syntax for backward compatibility 2002-06-19 */
if (options->delim)
{
/* if user gave a quoted string, use it as-is */
if (options->delim[0] == '\'')
appendPQExpBuffer(&query, " USING DELIMITERS %s", options->delim);
else
{
appendPQExpBuffer(&query, " USING DELIMITERS ");
appendStringLiteralConn(&query, options->delim, pset.db);
}
}
emit_copy_option(&query, " USING DELIMITERS ", options->delim);
/* There is no backward-compatible CSV syntax */
if (options->null)
{
/* if user gave a quoted string, use it as-is */
if (options->null[0] == '\'')
appendPQExpBuffer(&query, " WITH NULL AS %s", options->null);
else
{
appendPQExpBuffer(&query, " WITH NULL AS ");
appendStringLiteralConn(&query, options->null, pset.db);
}
}
emit_copy_option(&query, " WITH NULL AS ", options->null);
if (options->csv_mode)
appendPQExpBuffer(&query, " CSV");
......@@ -493,28 +491,10 @@ do_copy(const char *args)
appendPQExpBuffer(&query, " HEADER");
if (options->quote)
{
/* if user gave a quoted string, use it as-is */
if (options->quote[0] == '\'')
appendPQExpBuffer(&query, " QUOTE AS %s", options->quote);
else
{
appendPQExpBuffer(&query, " QUOTE AS ");
appendStringLiteralConn(&query, options->quote, pset.db);
}
}
emit_copy_option(&query, " QUOTE AS ", options->quote);
if (options->escape)
{
/* if user gave a quoted string, use it as-is */
if (options->escape[0] == '\'')
appendPQExpBuffer(&query, " ESCAPE AS %s", options->escape);
else
{
appendPQExpBuffer(&query, " ESCAPE AS ");
appendStringLiteralConn(&query, options->escape, pset.db);
}
}
emit_copy_option(&query, " ESCAPE AS ", options->escape);
if (options->force_quote_list)
appendPQExpBuffer(&query, " FORCE QUOTE %s", options->force_quote_list);
......
src/bin/psql/stringutils.c
浏览文件 @ 87e8014d
......@@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/stringutils.c,v 1.42 2006/03/05 15:58:52 momjian Exp $
* $PostgreSQL: pgsql/src/bin/psql/stringutils.c,v 1.43 2006/06/01 01:28:00 tgl Exp $
*/
#include "postgres_fe.h"
......@@ -32,7 +32,8 @@ static void strip_quotes(char *source, char quote, char escape, int encoding);
* delim - set of non-whitespace separator characters (or NULL)
* quote - set of characters that can quote a token (NULL if none)
* escape - character that can quote quotes (0 if none)
* del_quotes - if TRUE, strip quotes from the returned token, else return
* e_strings - if TRUE, treat E'...' syntax as a valid token
* del_quotes - if TRUE, strip quotes from the returned token, else return
* it exactly as found in the string
* encoding - the active character-set encoding
*
......@@ -43,6 +44,9 @@ static void strip_quotes(char *source, char quote, char escape, int encoding);
* a single quote character in the data. If escape isn't 0, then escape
* followed by anything (except \0) is a data character too.
*
* The combination of e_strings and del_quotes both TRUE is not currently
* handled. This could be fixed but it's not needed anywhere at the moment.
*
* Note that the string s is _not_ overwritten in this implementation.
*
* NB: it's okay to vary delim, quote, and escape from one call to the
......@@ -55,6 +59,7 @@ strtokx(const char *s,
const char *delim,
const char *quote,
char escape,
bool e_strings,
bool del_quotes,
int encoding)
{
......@@ -126,13 +131,24 @@ strtokx(const char *s,
return start;
}
/* check for E string */
p = start;
if (e_strings &&
(*p == 'E' || *p == 'e') &&
p[1] == '\'')
{
quote = "'";
escape = '\\'; /* if std strings before, not any more */
p++;
}
/* test if quoting character */
if (quote && strchr(quote, *start))
if (quote && strchr(quote, *p))
{
/* okay, we have a quoted token, now scan for the closer */
char thisquote = *start;
char thisquote = *p++;
for (p = start + 1; *p; p += PQmblen(p, encoding))
for (; *p; p += PQmblen(p, encoding))
{
if (*p == escape && p[1] != '\0')
p++; /* process escaped anything */
......
src/bin/psql/stringutils.h
浏览文件 @ 87e8014d
......@@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/stringutils.h,v 1.23 2006/03/05 15:58:52 momjian Exp $
* $PostgreSQL: pgsql/src/bin/psql/stringutils.h,v 1.24 2006/06/01 01:28:00 tgl Exp $
*/
#ifndef STRINGUTILS_H
#define STRINGUTILS_H
......@@ -15,6 +15,7 @@ extern char *strtokx(const char *s,
const char *delim,
const char *quote,
char escape,
bool e_strings,
bool del_quotes,
int encoding);
......
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