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Add utility functions to PLPerl:

Browse Source 
quote_literal, quote_nullable, quote_ident,
    encode_bytea, decode_bytea, looks_like_number,
    encode_array_literal, encode_array_constructor.
Split SPI.xs into two - SPI.xs now contains only SPI functions. Remainder
are in new Util.xs.
Some more code and documentation cleanup along the way, as well as
adding some CVS markers to files missing them.

Original patch from Tim Bunce, with a little editing from me.
This commit is contained in:
Andrew Dunstan
2010-01-20 01:08:21 +00:00
parent 5b13d1ff53
commit 05672e5045
14 changed files with 747 additions and 211 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
src/pl/plperl/GNUmakefile
View File

@ -1,5 +1,5 @@
# Makefile for PL/Perl
# $PostgreSQL: pgsql/src/pl/plperl/GNUmakefile,v 1.41 2010/01/10 18:10:03 tgl Exp $
# $PostgreSQL: pgsql/src/pl/plperl/GNUmakefile,v 1.42 2010/01/20 01:08:21 adunstan Exp $
subdir = src/pl/plperl
top_builddir = ../../..
@ -34,14 +34,14 @@ rpathdir = $(perl_archlibexp)/CORE
NAME = plperl
OBJS = plperl.o spi_internal.o SPI.o
OBJS = plperl.o SPI.o Util.o
PERLCHUNKS = plc_perlboot.pl plc_safe_bad.pl plc_safe_ok.pl
SHLIB_LINK = $(perl_embed_ldflags)
REGRESS_OPTS = --dbname=$(PL_TESTDB) --load-language=plperl --load-language=plperlu
REGRESS = plperl plperl_trigger plperl_shared plperl_elog plperlu
REGRESS = plperl plperl_trigger plperl_shared plperl_elog plperl_util plperlu
# if Perl can support two interpreters in one backend,
# test plperl-and-plperlu cases
ifneq ($(PERL),)
@ -64,6 +64,9 @@ all: all-lib
SPI.c: SPI.xs
$(PERL) $(perl_privlibexp)/ExtUtils/xsubpp -typemap $(perl_privlibexp)/ExtUtils/typemap $< >$@
Util.c: Util.xs
$(PERL) $(perl_privlibexp)/ExtUtils/xsubpp -typemap $(perl_privlibexp)/ExtUtils/typemap $< >$@
install: all installdirs install-lib
installdirs: installdirs-lib
@ -78,7 +81,7 @@ submake:
$(MAKE) -C $(top_builddir)/src/test/regress pg_regress$(X)
clean distclean maintainer-clean: clean-lib
rm -f SPI.c $(OBJS) perlchunks.h
rm -f SPI.c Util.c $(OBJS) perlchunks.h
rm -rf results
rm -f regression.diffs regression.out

74
src/pl/plperl/SPI.xs
View File

@ -1,3 +1,12 @@
/**********************************************************************
* PostgreSQL::InServer::SPI
*
* SPI interface for plperl.
*
* $PostgreSQL: pgsql/src/pl/plperl/SPI.xs,v 1.21 2010/01/20 01:08:21 adunstan Exp $
*
**********************************************************************/
/* this must be first: */
#include "postgres.h"
/* Defined by Perl */
@ -7,40 +16,6 @@
#include "plperl.h"
/*
* Implementation of plperl's elog() function
*
* If the error level is less than ERROR, we'll just emit the message and
* return. When it is ERROR, elog() will longjmp, which we catch and
* turn into a Perl croak(). Note we are assuming that elog() can't have
* any internal failures that are so bad as to require a transaction abort.
*
* This is out-of-line to suppress "might be clobbered by longjmp" warnings.
*/
static void
do_spi_elog(int level, char *message)
{
MemoryContext oldcontext = CurrentMemoryContext;
PG_TRY();
{
elog(level, "%s", message);
}
PG_CATCH();
{
ErrorData *edata;
/* Must reset elog.c's state */
MemoryContextSwitchTo(oldcontext);
edata = CopyErrorData();
FlushErrorState();
/* Punt the error to Perl */
croak("%s", edata->message);
}
PG_END_TRY();
}
/*
* Interface routine to catch ereports and punt them to Perl
*/
@ -69,40 +44,11 @@ do_plperl_return_next(SV *sv)
}
MODULE = SPI PREFIX = spi_
MODULE = PostgreSQL::InServer::SPI PREFIX = spi_
PROTOTYPES: ENABLE
VERSIONCHECK: DISABLE
void
spi_elog(level, message)
int level
char* message
CODE:
if (level > ERROR) /* no PANIC allowed thanks */
level = ERROR;
if (level < DEBUG5)
level = DEBUG5;
do_spi_elog(level, message);
int
spi_DEBUG()
int
spi_LOG()
int
spi_INFO()
int
spi_NOTICE()
int
spi_WARNING()
int
spi_ERROR()
SV*
spi_spi_exec_query(query, ...)
char* query;

205
src/pl/plperl/Util.xs Normal file
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@ -0,0 +1,205 @@
/**********************************************************************
* PostgreSQL::InServer::Util
*
* $PostgreSQL: pgsql/src/pl/plperl/Util.xs,v 1.1 2010/01/20 01:08:21 adunstan Exp $
*
* Defines plperl interfaces for general-purpose utilities.
* This module is bootstrapped as soon as an interpreter is initialized.
* Currently doesn't define a PACKAGE= so all subs are in main:: to avoid
* the need for explicit importing.
*
**********************************************************************/
/* this must be first: */
#include "postgres.h"
#include "fmgr.h"
#include "utils/builtins.h"
#include "utils/bytea.h" /* for byteain & byteaout */
#include "mb/pg_wchar.h" /* for GetDatabaseEncoding */
/* Defined by Perl */
#undef _
/* perl stuff */
#include "plperl.h"
/*
* Implementation of plperl's elog() function
*
* If the error level is less than ERROR, we'll just emit the message and
* return. When it is ERROR, elog() will longjmp, which we catch and
* turn into a Perl croak(). Note we are assuming that elog() can't have
* any internal failures that are so bad as to require a transaction abort.
*
* This is out-of-line to suppress "might be clobbered by longjmp" warnings.
*/
static void
do_util_elog(int level, char *message)
{
MemoryContext oldcontext = CurrentMemoryContext;
PG_TRY();
{
elog(level, "%s", message);
}
PG_CATCH();
{
ErrorData *edata;
/* Must reset elog.c's state */
MemoryContextSwitchTo(oldcontext);
edata = CopyErrorData();
FlushErrorState();
/* Punt the error to Perl */
croak("%s", edata->message);
}
PG_END_TRY();
}
static SV *
newSVstring_len(const char *str, STRLEN len)
{
SV *sv;
sv = newSVpvn(str, len);
#if PERL_BCDVERSION >= 0x5006000L
if (GetDatabaseEncoding() == PG_UTF8)
SvUTF8_on(sv);
#endif
return sv;
}
static text *
sv2text(SV *sv)
{
STRLEN sv_len;
char *sv_pv;
if (!sv)
sv = &PL_sv_undef;
sv_pv = SvPV(sv, sv_len);
return cstring_to_text_with_len(sv_pv, sv_len);
}
MODULE = PostgreSQL::InServer::Util PREFIX = util_
PROTOTYPES: ENABLE
VERSIONCHECK: DISABLE
int
_aliased_constants()
PROTOTYPE:
ALIAS:
DEBUG = DEBUG2
LOG = LOG
INFO = INFO
NOTICE = NOTICE
WARNING = WARNING
ERROR = ERROR
CODE:
/* uses the ALIAS value as the return value */
RETVAL = ix;
OUTPUT:
RETVAL
void
util_elog(level, message)
int level
char* message
CODE:
if (level > ERROR) /* no PANIC allowed thanks */
level = ERROR;
if (level < DEBUG5)
level = DEBUG5;
do_util_elog(level, message);
SV *
util_quote_literal(sv)
SV *sv
CODE:
if (!sv || !SvOK(sv)) {
RETVAL = &PL_sv_undef;
}
else {
text *arg = sv2text(sv);
text *ret = DatumGetTextP(DirectFunctionCall1(quote_literal, PointerGetDatum(arg)));
RETVAL = newSVstring_len(VARDATA(ret), (VARSIZE(ret) - VARHDRSZ));
}
OUTPUT:
RETVAL
SV *
util_quote_nullable(sv)
SV *sv
CODE:
if (!sv || !SvOK(sv))
{
RETVAL = newSVstring_len("NULL", 4);
}
else
{
text *arg = sv2text(sv);
text *ret = DatumGetTextP(DirectFunctionCall1(quote_nullable, PointerGetDatum(arg)));
RETVAL = newSVstring_len(VARDATA(ret), (VARSIZE(ret) - VARHDRSZ));
}
OUTPUT:
RETVAL
SV *
util_quote_ident(sv)
SV *sv
PREINIT:
text *arg;
text *ret;
CODE:
arg = sv2text(sv);
ret = DatumGetTextP(DirectFunctionCall1(quote_ident, PointerGetDatum(arg)));
RETVAL = newSVstring_len(VARDATA(ret), (VARSIZE(ret) - VARHDRSZ));
OUTPUT:
RETVAL
SV *
util_decode_bytea(sv)
SV *sv
PREINIT:
char *arg;
text *ret;
CODE:
arg = SvPV_nolen(sv);
ret = DatumGetTextP(DirectFunctionCall1(byteain, PointerGetDatum(arg)));
/* not newSVstring_len because this is raw bytes not utf8'able */
RETVAL = newSVpvn(VARDATA(ret), (VARSIZE(ret) - VARHDRSZ));
OUTPUT:
RETVAL
SV *
util_encode_bytea(sv)
SV *sv
PREINIT:
text *arg;
char *ret;
CODE:
arg = sv2text(sv);
ret = DatumGetCString(DirectFunctionCall1(byteaout, PointerGetDatum(arg)));
RETVAL = newSVstring_len(ret, strlen(ret));
OUTPUT:
RETVAL
SV *
looks_like_number(sv)
SV *sv
CODE:
if (!SvOK(sv))
RETVAL = &PL_sv_undef;
else if ( looks_like_number(sv) )
RETVAL = &PL_sv_yes;
else
RETVAL = &PL_sv_no;
OUTPUT:
RETVAL
BOOT:
items = 0; /* avoid 'unused variable' warning */

1
src/pl/plperl/expected/plperl_elog.out
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@ -21,7 +21,6 @@ create or replace function perl_warn(text) returns void language plperl as $$
$$;
select perl_warn('implicit elog via warn');
NOTICE: implicit elog via warn at line 4.
CONTEXT: PL/Perl function "perl_warn"
perl_warn
-----------

171
src/pl/plperl/expected/plperl_util.out Normal file
View File

@ -0,0 +1,171 @@
-- test plperl utility functions (defined in Util.xs)
-- test quote_literal
create or replace function perl_quote_literal() returns setof text language plperl as $$
return_next "undef: ".quote_literal(undef);
return_next sprintf"$_: ".quote_literal($_)
for q{foo}, q{a'b}, q{a"b}, q{c''d}, q{e\f}, q{};
return undef;
$$;
select perl_quote_literal();
perl_quote_literal
--------------------
undef:
foo: 'foo'
a'b: 'a''b'
a"b: 'a"b'
c''d: 'c''''d'
e\f: E'e\\f'
: ''
(7 rows)
-- test quote_nullable
create or replace function perl_quote_nullable() returns setof text language plperl as $$
return_next "undef: ".quote_nullable(undef);
return_next sprintf"$_: ".quote_nullable($_)
for q{foo}, q{a'b}, q{a"b}, q{c''d}, q{e\f}, q{};
return undef;
$$;
select perl_quote_nullable();
perl_quote_nullable
---------------------
undef: NULL
foo: 'foo'
a'b: 'a''b'
a"b: 'a"b'
c''d: 'c''''d'
e\f: E'e\\f'
: ''
(7 rows)
-- test quote_ident
create or replace function perl_quote_ident() returns setof text language plperl as $$
return_next "undef: ".quote_ident(undef); # generates undef warning if warnings enabled
return_next "$_: ".quote_ident($_)
for q{foo}, q{a'b}, q{a"b}, q{c''d}, q{e\f}, q{g.h}, q{};
return undef;
$$;
select perl_quote_ident();
perl_quote_ident
------------------
undef: ""
foo: foo
a'b: "a'b"
a"b: "a""b"
c''d: "c''d"
e\f: "e\f"
g.h: "g.h"
: ""
(8 rows)
-- test decode_bytea
create or replace function perl_decode_bytea() returns setof text language plperl as $$
return_next "undef: ".decode_bytea(undef); # generates undef warning if warnings enabled
return_next "$_: ".decode_bytea($_)
for q{foo}, q{a\047b}, q{};
return undef;
$$;
select perl_decode_bytea();
perl_decode_bytea
-------------------
undef:
foo: foo
a\047b: a'b
:
(4 rows)
-- test encode_bytea
create or replace function perl_encode_bytea() returns setof text language plperl as $$
return_next encode_bytea(undef); # generates undef warning if warnings enabled
return_next encode_bytea($_)
for q{@}, qq{@\x01@}, qq{@\x00@}, q{};
return undef;
$$;
select perl_encode_bytea();
perl_encode_bytea
-------------------
\x
\x40
\x400140
\x400040
\x
(5 rows)
-- test encode_array_literal
create or replace function perl_encode_array_literal() returns setof text language plperl as $$
return_next encode_array_literal(undef);
return_next encode_array_literal(0);
return_next encode_array_literal(42);
return_next encode_array_literal($_)
for [], [0], [1..5], [[]], [[1,2,[3]],4];
return_next encode_array_literal($_,'|')
for [], [0], [1..5], [[]], [[1,2,[3]],4];
return undef;
$$;
select perl_encode_array_literal();
perl_encode_array_literal
---------------------------
0
42
{}
{"0"}
{"1", "2", "3", "4", "5"}
{{}}
{{"1", "2", {"3"}}, "4"}
{}
{"0"}
{"1"|"2"|"3"|"4"|"5"}
{{}}
{{"1"|"2"|{"3"}}|"4"}
(13 rows)
-- test encode_array_constructor
create or replace function perl_encode_array_constructor() returns setof text language plperl as $$
return_next encode_array_constructor(undef);
return_next encode_array_constructor(0);
return_next encode_array_constructor(42);
return_next encode_array_constructor($_)
for [], [0], [1..5], [[]], [[1,2,[3]],4];
return undef;
$$;
select perl_encode_array_constructor();
perl_encode_array_constructor
-----------------------------------------
NULL
'0'
'42'
ARRAY[]
ARRAY['0']
ARRAY['1', '2', '3', '4', '5']
ARRAY[ARRAY[]]
ARRAY[ARRAY['1', '2', ARRAY['3']], '4']
(8 rows)
-- test looks_like_number
create or replace function perl_looks_like_number() returns setof text language plperl as $$
return_next "undef is undef" if not defined looks_like_number(undef);
return_next quote_nullable($_).": ". (looks_like_number($_) ? "number" : "not number")
for 'foo', 0, 1, 1.3, '+3.e-4',
'42 x', # trailing garbage
'99 ', # trailing space
' 99', # leading space
' ', # only space
''; # empty string
return undef;
$$;
select perl_looks_like_number();
perl_looks_like_number
------------------------
undef is undef
'foo': not number
'0': number
'1': number
'1.3': number
'+3.e-4': number
'42 x': not number
'99 ': number
' 99': number
' ': not number
'': not number
(11 rows)

67
src/pl/plperl/plc_perlboot.pl
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@ -1,24 +1,33 @@
SPI::bootstrap();
# $PostgreSQL: pgsql/src/pl/plperl/plc_perlboot.pl,v 1.2 2010/01/20 01:08:21 adunstan Exp $
PostgreSQL::InServer::Util::bootstrap();
PostgreSQL::InServer::SPI::bootstrap();
use strict;
use warnings;
use vars qw(%_SHARED);
sub ::plperl_warn {
(my $msg = shift) =~ s/\(eval \d+\) //g;
chomp $msg;
&elog(&NOTICE, $msg);
}
$SIG{__WARN__} = \&::plperl_warn;
sub ::plperl_die {
(my $msg = shift) =~ s/\(eval \d+\) //g;
die $msg;
die $msg;
}
$SIG{__DIE__} = \&::plperl_die;
sub ::mkunsafefunc {
my $ret = eval(qq[ sub { $_[0] $_[1] } ]);
$@ =~ s/\(eval \d+\) //g if $@;
return $ret;
}
use strict;
sub ::mk_strict_unsafefunc {
@ -27,24 +36,36 @@ sub ::mk_strict_unsafefunc {
return $ret;
}
sub ::_plperl_to_pg_array {
my $arg = shift;
ref $arg eq 'ARRAY' || return $arg;
my $res = '';
my $first = 1;
foreach my $elem (@$arg) {
$res .= ', ' unless $first; $first = undef;
if (ref $elem) {
$res .= _plperl_to_pg_array($elem);
}
elsif (defined($elem)) {
my $str = qq($elem);
$str =~ s/([\"\\])/\\$1/g;
$res .= qq(\"$str\");
}
else {
$res .= 'NULL' ;
}
}
return qq({$res});
sub ::encode_array_literal {
my ($arg, $delim) = @_;
return $arg
if ref $arg ne 'ARRAY';
$delim = ', ' unless defined $delim;
my $res = '';
foreach my $elem (@$arg) {
$res .= $delim if length $res;
if (ref $elem) {
$res .= ::encode_array_literal($elem, $delim);
}
elsif (defined $elem) {
(my $str = $elem) =~ s/(["\\])/\\$1/g;
$res .= qq("$str");
}
else {
$res .= 'NULL';
}
}
return qq({$res});
}
sub ::encode_array_constructor {
my $arg = shift;
return quote_nullable($arg)
if ref $arg ne 'ARRAY';
my $res = join ", ", map {
(ref $_) ? ::encode_array_constructor($_)
: ::quote_nullable($_)
} @$arg;
return "ARRAY[$res]";
}

3
src/pl/plperl/plc_safe_bad.pl
View File

@ -1,3 +1,6 @@
# $PostgreSQL: pgsql/src/pl/plperl/plc_safe_bad.pl,v 1.2 2010/01/20 01:08:21 adunstan Exp $
use vars qw($PLContainer);
$PLContainer = new Safe('PLPerl');

9
src/pl/plperl/plc_safe_ok.pl
View File

@ -1,3 +1,7 @@
# $PostgreSQL: pgsql/src/pl/plperl/plc_safe_ok.pl,v 1.2 2010/01/20 01:08:21 adunstan Exp $
use vars qw($PLContainer);
$PLContainer = new Safe('PLPerl');
@ -7,8 +11,11 @@ $PLContainer->permit(qw[:base_math !:base_io sort time]);
$PLContainer->share(qw[&elog &return_next
&spi_query &spi_fetchrow &spi_cursor_close &spi_exec_query
&spi_prepare &spi_exec_prepared &spi_query_prepared &spi_freeplan
&_plperl_to_pg_array
&DEBUG &LOG &INFO &NOTICE &WARNING &ERROR %_SHARED
&quote_literal &quote_nullable &quote_ident
&encode_bytea &decode_bytea
&encode_array_literal &encode_array_constructor
&looks_like_number
]);
# Load strict into the container.

14
src/pl/plperl/plperl.c
View File

@ -1,7 +1,7 @@
/**********************************************************************
* plperl.c - perl as a procedural language for PostgreSQL
*
* $PostgreSQL: pgsql/src/pl/plperl/plperl.c,v 1.159 2010/01/09 02:40:50 adunstan Exp $
* $PostgreSQL: pgsql/src/pl/plperl/plperl.c,v 1.160 2010/01/20 01:08:21 adunstan Exp $
*
**********************************************************************/
@ -589,12 +589,12 @@ plperl_convert_to_pg_array(SV *src)
XPUSHs(src);
PUTBACK;
count = call_pv("::_plperl_to_pg_array", G_SCALAR);
count = perl_call_pv("::encode_array_literal", G_SCALAR);
SPAGAIN;
if (count != 1)
elog(ERROR, "unexpected _plperl_to_pg_array failure");
elog(ERROR, "unexpected encode_array_literal failure");
rv = POPs;
@ -1089,7 +1089,8 @@ plperl_create_sub(plperl_proc_desc *prodesc, char *s)
**********************************************************************/
EXTERN_C void boot_DynaLoader(pTHX_ CV *cv);
EXTERN_C void boot_SPI(pTHX_ CV *cv);
EXTERN_C void boot_PostgreSQL__InServer__SPI(pTHX_ CV *cv);
EXTERN_C void boot_PostgreSQL__InServer__Util(pTHX_ CV *cv);
static void
plperl_init_shared_libs(pTHX)
@ -1097,7 +1098,10 @@ plperl_init_shared_libs(pTHX)
char *file = __FILE__;
newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
newXS("SPI::bootstrap", boot_SPI, file);
newXS("PostgreSQL::InServer::SPI::bootstrap",
boot_PostgreSQL__InServer__SPI, file);
newXS("PostgreSQL::InServer::Util::bootstrap",
boot_PostgreSQL__InServer__Util, file);
}

23
src/pl/plperl/plperl.h
View File

@ -8,7 +8,7 @@
* Portions Copyright (c) 1996-2010, PostgreSQL Global Development Group
* Portions Copyright (c) 1995, Regents of the University of California
*
* $PostgreSQL: pgsql/src/pl/plperl/plperl.h,v 1.10 2010/01/02 16:58:12 momjian Exp $
* $PostgreSQL: pgsql/src/pl/plperl/plperl.h,v 1.11 2010/01/20 01:08:21 adunstan Exp $
*/
#ifndef PL_PERL_H
@ -30,28 +30,19 @@
#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"
#include "ppport.h"
/* just in case these symbols aren't provided */
#ifndef pTHX_
#define pTHX_
#define pTHX void
#endif
/* perl version and platform portability */
#define NEED_eval_pv
#define NEED_newRV_noinc
#define NEED_sv_2pv_flags
#include "ppport.h"
/* perl may have a different width of "bool", don't buy it */
#ifdef bool
#undef bool
#endif
/* routines from spi_internal.c */
int spi_DEBUG(void);
int spi_LOG(void);
int spi_INFO(void);
int spi_NOTICE(void);
int spi_WARNING(void);
int spi_ERROR(void);
/* routines from plperl.c */
/* declare routines from plperl.c for access by .xs files */
HV *plperl_spi_exec(char *, int);
void plperl_return_next(SV *);
SV *plperl_spi_query(char *);

51
src/pl/plperl/spi_internal.c
View File

@ -1,51 +0,0 @@
/*
* $PostgreSQL: pgsql/src/pl/plperl/spi_internal.c,v 1.10 2009/06/11 14:49:14 momjian Exp $
*
*
* This kludge is necessary because of the conflicting
* definitions of 'DEBUG' between postgres and perl.
* we'll live.
*/
#include "postgres.h"
/* Defined by Perl */
#undef _
/* perl stuff */
#include "plperl.h"
int
spi_DEBUG(void)
{
return DEBUG2;
}
int
spi_LOG(void)
{
return LOG;
}
int
spi_INFO(void)
{
return INFO;
}
int
spi_NOTICE(void)
{
return NOTICE;
}
int
spi_WARNING(void)
{
return WARNING;
}
int
spi_ERROR(void)
{
return ERROR;
}

100
src/pl/plperl/sql/plperl_util.sql Normal file
View File

@ -0,0 +1,100 @@
-- test plperl utility functions (defined in Util.xs)
-- test quote_literal
create or replace function perl_quote_literal() returns setof text language plperl as $$
return_next "undef: ".quote_literal(undef);
return_next sprintf"$_: ".quote_literal($_)
for q{foo}, q{a'b}, q{a"b}, q{c''d}, q{e\f}, q{};
return undef;
$$;
select perl_quote_literal();
-- test quote_nullable
create or replace function perl_quote_nullable() returns setof text language plperl as $$
return_next "undef: ".quote_nullable(undef);
return_next sprintf"$_: ".quote_nullable($_)
for q{foo}, q{a'b}, q{a"b}, q{c''d}, q{e\f}, q{};
return undef;
$$;
select perl_quote_nullable();
-- test quote_ident
create or replace function perl_quote_ident() returns setof text language plperl as $$
return_next "undef: ".quote_ident(undef); # generates undef warning if warnings enabled
return_next "$_: ".quote_ident($_)
for q{foo}, q{a'b}, q{a"b}, q{c''d}, q{e\f}, q{g.h}, q{};
return undef;
$$;
select perl_quote_ident();
-- test decode_bytea
create or replace function perl_decode_bytea() returns setof text language plperl as $$
return_next "undef: ".decode_bytea(undef); # generates undef warning if warnings enabled
return_next "$_: ".decode_bytea($_)
for q{foo}, q{a\047b}, q{};
return undef;
$$;
select perl_decode_bytea();
-- test encode_bytea
create or replace function perl_encode_bytea() returns setof text language plperl as $$
return_next encode_bytea(undef); # generates undef warning if warnings enabled
return_next encode_bytea($_)
for q{@}, qq{@\x01@}, qq{@\x00@}, q{};
return undef;
$$;
select perl_encode_bytea();
-- test encode_array_literal
create or replace function perl_encode_array_literal() returns setof text language plperl as $$
return_next encode_array_literal(undef);
return_next encode_array_literal(0);
return_next encode_array_literal(42);
return_next encode_array_literal($_)
for [], [0], [1..5], [[]], [[1,2,[3]],4];
return_next encode_array_literal($_,'|')
for [], [0], [1..5], [[]], [[1,2,[3]],4];
return undef;
$$;
select perl_encode_array_literal();
-- test encode_array_constructor
create or replace function perl_encode_array_constructor() returns setof text language plperl as $$
return_next encode_array_constructor(undef);
return_next encode_array_constructor(0);
return_next encode_array_constructor(42);
return_next encode_array_constructor($_)
for [], [0], [1..5], [[]], [[1,2,[3]],4];
return undef;
$$;
select perl_encode_array_constructor();
-- test looks_like_number
create or replace function perl_looks_like_number() returns setof text language plperl as $$
return_next "undef is undef" if not defined looks_like_number(undef);
return_next quote_nullable($_).": ". (looks_like_number($_) ? "number" : "not number")
for 'foo', 0, 1, 1.3, '+3.e-4',
'42 x', # trailing garbage
'99 ', # trailing space
' 99', # leading space
' ', # only space
''; # empty string
return undef;
$$;
select perl_looks_like_number();

3
src/pl/plperl/text2macro.pl
View File

@ -1,3 +1,6 @@
# $PostgreSQL: pgsql/src/pl/plperl/text2macro.pl,v 1.2 2010/01/20 01:08:21 adunstan Exp $
=head1 NAME
text2macro.pl - convert text files into C string-literal macro definitions