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Accept 'on' and 'off' as input for boolean data type, unifying the syntax

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that the data type and GUC accepts.

ITAGAKI Takahiro
This commit is contained in:
Peter Eisentraut 2009-03-09 14:34:35 +00:00
parent fd497ab650
commit 05a7db0582
7 changed files with 149 additions and 115 deletions
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4
doc/src/sgml/datatype.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.235 2008/12/19 01:34:19 tgl Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/datatype.sgml,v 1.236 2009/03/09 14:34:34 petere Exp $ -->
<chapter id="datatype">
<title id="datatype-title">Data Types</title>
@ -2686,6 +2686,7 @@ P <optional> <replaceable>years</>-<replaceable>months</>-<replaceable>days</> <
<member><literal>'true'</literal></member>
<member><literal>'y'</literal></member>
<member><literal>'yes'</literal></member>
<member><literal>'on'</literal></member>
<member><literal>'1'</literal></member>
</simplelist>
For the <quote>false</quote> state, the following values can be
@ -2696,6 +2697,7 @@ P <optional> <replaceable>years</>-<replaceable>months</>-<replaceable>days</> <
<member><literal>'false'</literal></member>
<member><literal>'n'</literal></member>
<member><literal>'no'</literal></member>
<member><literal>'off'</literal></member>
<member><literal>'0'</literal></member>
</simplelist>
Leading and trailing whitespace is ignored. Using the key words

141
src/backend/utils/adt/bool.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/bool.c,v 1.45 2009/01/01 17:23:49 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/bool.c,v 1.46 2009/03/09 14:34:34 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -20,6 +20,99 @@
#include "libpq/pqformat.h"
#include "utils/builtins.h"
/*
* Try to interpret value as boolean value. Valid values are: true,
* false, yes, no, on, off, 1, 0; as well as unique prefixes thereof.
* If the string parses okay, return true, else false.
* If okay and result is not NULL, return the value in *result.
*/
bool
parse_bool(const char *value, bool *result)
{
return parse_bool_with_len(value, strlen(value), result);
}
bool
parse_bool_with_len(const char *value, size_t len, bool *result)
{
switch (*value)
{
case 't':
case 'T':
if (pg_strncasecmp(value, "true", len) == 0)
{
if (result)
*result = true;
return true;
}
break;
case 'f':
case 'F':
if (pg_strncasecmp(value, "false", len) == 0)
{
if (result)
*result = false;
return true;
}
break;
case 'y':
case 'Y':
if (pg_strncasecmp(value, "yes", len) == 0)
{
if (result)
*result = true;
return true;
}
break;
case 'n':
case 'N':
if (pg_strncasecmp(value, "no", len) == 0)
{
if (result)
*result = false;
return true;
}
break;
case 'o':
case 'O':
/* 'o' is not unique enough */
if (pg_strncasecmp(value, "on", (len > 2 ? len : 2)) == 0)
{
if (result)
*result = true;
return true;
}
else if (pg_strncasecmp(value, "off", (len > 2 ? len : 2)) == 0)
{
if (result)
*result = false;
return true;
}
break;
case '1':
if (len == 1)
{
if (result)
*result = true;
return true;
}
break;
case '0':
if (len == 1)
{
if (result)
*result = false;
return true;
}
break;
default:
break;
}
*result = false; /* suppress compiler warning */
return false;
}
/*****************************************************************************
* USER I/O ROUTINES *
*****************************************************************************/
@ -27,8 +120,8 @@
/*
* boolin - converts "t" or "f" to 1 or 0
*
* Check explicitly for "true/false" and TRUE/FALSE, 1/0, YES/NO.
* Reject other values. - thomas 1997-10-05
* Check explicitly for "true/false" and TRUE/FALSE, 1/0, YES/NO, ON/OFF.
* Reject other values.
*
* In the switch statement, check the most-used possibilities first.
*/
@ -38,6 +131,7 @@ boolin(PG_FUNCTION_ARGS)
const char *in_str = PG_GETARG_CSTRING(0);
const char *str;
size_t len;
bool result;
/*
* Skip leading and trailing whitespace
@ -50,45 +144,8 @@ boolin(PG_FUNCTION_ARGS)
while (len > 0 && isspace((unsigned char) str[len - 1]))
len--;
switch (*str)
{
case 't':
case 'T':
if (pg_strncasecmp(str, "true", len) == 0)
PG_RETURN_BOOL(true);
break;
case 'f':
case 'F':
if (pg_strncasecmp(str, "false", len) == 0)
PG_RETURN_BOOL(false);
break;
case 'y':
case 'Y':
if (pg_strncasecmp(str, "yes", len) == 0)
PG_RETURN_BOOL(true);
break;
case '1':
if (pg_strncasecmp(str, "1", len) == 0)
PG_RETURN_BOOL(true);
break;
case 'n':
case 'N':
if (pg_strncasecmp(str, "no", len) == 0)
PG_RETURN_BOOL(false);
break;
case '0':
if (pg_strncasecmp(str, "0", len) == 0)
PG_RETURN_BOOL(false);
break;
default:
break;
}
if (parse_bool_with_len(str, len, &result))
PG_RETURN_BOOL(result);
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),

70
src/backend/utils/misc/guc.c
View File

@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.496 2009/02/28 00:10:51 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.497 2009/03/09 14:34:34 petere Exp $
*
*--------------------------------------------------------------------
*/
@ -4086,74 +4086,6 @@ ReportGUCOption(struct config_generic * record)
}
}
/*
* Try to interpret value as boolean value. Valid values are: true,
* false, yes, no, on, off, 1, 0; as well as unique prefixes thereof.
* If the string parses okay, return true, else false.
* If okay and result is not NULL, return the value in *result.
*/
bool
parse_bool(const char *value, bool *result)
{
size_t len = strlen(value);
if (pg_strncasecmp(value, "true", len) == 0)
{
if (result)
*result = true;
}
else if (pg_strncasecmp(value, "false", len) == 0)
{
if (result)
*result = false;
}
else if (pg_strncasecmp(value, "yes", len) == 0)
{
if (result)
*result = true;
}
else if (pg_strncasecmp(value, "no", len) == 0)
{
if (result)
*result = false;
}
/* 'o' is not unique enough */
else if (pg_strncasecmp(value, "on", (len > 2 ? len : 2)) == 0)
{
if (result)
*result = true;
}
else if (pg_strncasecmp(value, "off", (len > 2 ? len : 2)) == 0)
{
if (result)
*result = false;
}
else if (pg_strcasecmp(value, "1") == 0)
{
if (result)
*result = true;
}
else if (pg_strcasecmp(value, "0") == 0)
{
if (result)
*result = false;
}
else
{
if (result)
*result = false; /* suppress compiler warning */
return false;
}
return true;
}
/*
* Try to parse value as an integer. The accepted formats are the
* usual decimal, octal, or hexadecimal formats, optionally followed by

4
src/include/utils/builtins.h
View File

@ -7,7 +7,7 @@
* Portions Copyright (c) 1996-2009, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.331 2009/02/06 21:15:12 tgl Exp $
* $PostgreSQL: pgsql/src/include/utils/builtins.h,v 1.332 2009/03/09 14:34:34 petere Exp $
*
*-------------------------------------------------------------------------
*/
@ -109,6 +109,8 @@ extern Datum boolle(PG_FUNCTION_ARGS);
extern Datum boolge(PG_FUNCTION_ARGS);
extern Datum booland_statefunc(PG_FUNCTION_ARGS);
extern Datum boolor_statefunc(PG_FUNCTION_ARGS);
extern bool parse_bool(const char *value, bool *result);
extern bool parse_bool_with_len(const char *value, size_t len, bool *result);
/* char.c */
extern Datum charin(PG_FUNCTION_ARGS);

3
src/include/utils/guc.h
View File

@ -7,7 +7,7 @@
* Copyright (c) 2000-2009, PostgreSQL Global Development Group
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* $PostgreSQL: pgsql/src/include/utils/guc.h,v 1.100 2009/01/01 17:24:02 momjian Exp $
* $PostgreSQL: pgsql/src/include/utils/guc.h,v 1.101 2009/03/09 14:34:35 petere Exp $
*--------------------------------------------------------------------
*/
#ifndef GUC_H
@ -257,7 +257,6 @@ extern int NewGUCNestLevel(void);
extern void AtEOXact_GUC(bool isCommit, int nestLevel);
extern void BeginReportingGUCOptions(void);
extern void ParseLongOption(const char *string, char **name, char **value);
extern bool parse_bool(const char *value, bool *result);
extern bool parse_int(const char *value, int *result, int flags,
const char **hintmsg);
extern bool parse_real(const char *value, double *result);

30
src/test/regress/expected/boolean.out
View File

@ -88,6 +88,36 @@ SELECT bool 'nay' AS error;
ERROR: invalid input syntax for type boolean: "nay"
LINE 1: SELECT bool 'nay' AS error;
^
SELECT bool 'on' AS true;
true
------
t
(1 row)
SELECT bool 'off' AS false;
false
-------
f
(1 row)
SELECT bool 'of' AS false;
false
-------
f
(1 row)
SELECT bool 'o' AS error;
ERROR: invalid input syntax for type boolean: "o"
LINE 1: SELECT bool 'o' AS error;
^
SELECT bool 'on_' AS error;
ERROR: invalid input syntax for type boolean: "on_"
LINE 1: SELECT bool 'on_' AS error;
^
SELECT bool 'off_' AS error;
ERROR: invalid input syntax for type boolean: "off_"
LINE 1: SELECT bool 'off_' AS error;
^
SELECT bool '1' AS true;
true
------

12
src/test/regress/sql/boolean.sql
View File

@ -40,6 +40,18 @@ SELECT bool 'no' AS false;
SELECT bool 'nay' AS error;
SELECT bool 'on' AS true;
SELECT bool 'off' AS false;
SELECT bool 'of' AS false;
SELECT bool 'o' AS error;
SELECT bool 'on_' AS error;
SELECT bool 'off_' AS error;
SELECT bool '1' AS true;
SELECT bool '11' AS error;