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Commit878ce16

Browse files
committed
Convert contrib/seg's input function to report errors softly
Reviewed by Tom LaneDiscussion:https://postgr.es/m/a8dc5700-c341-3ba8-0507-cc09881e6200@dunslane.net
1 parent7a31033 commit878ce16

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6 files changed

+70
-18
lines changed

6 files changed

+70
-18
lines changed

‎contrib/seg/expected/seg.out‎

Lines changed: 20 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1273,3 +1273,23 @@ FROM test_seg WHERE s @> '11.2..11.3' OR s IS NULL ORDER BY s;
12731273
| |
12741274
(144 rows)
12751275

1276+
-- test non error throwing API
1277+
SELECT str as seg,
1278+
pg_input_is_valid(str,'seg') as ok,
1279+
pg_input_error_message(str,'seg') as errmsg
1280+
FROM unnest(ARRAY['-1 .. 1'::text,
1281+
'100(+-)1',
1282+
'',
1283+
'ABC',
1284+
'1 e7',
1285+
'1e700']) str;
1286+
seg | ok | errmsg
1287+
----------+----+---------------------------------------
1288+
-1 .. 1 | t |
1289+
100(+-)1 | t |
1290+
| f | bad seg representation
1291+
ABC | f | bad seg representation
1292+
1 e7 | f | bad seg representation
1293+
1e700 | f | "1e700" is out of range for type real
1294+
(6 rows)
1295+

‎contrib/seg/seg.c‎

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -108,8 +108,8 @@ seg_in(PG_FUNCTION_ARGS)
108108

109109
seg_scanner_init(str);
110110

111-
if (seg_yyparse(result)!=0)
112-
seg_yyerror(result,"bogus input");
111+
if (seg_yyparse(result,fcinfo->context)!=0)
112+
seg_yyerror(result,fcinfo->context,"bogus input");
113113

114114
seg_scanner_finish();
115115

‎contrib/seg/segdata.h‎

Lines changed: 3 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -16,9 +16,10 @@ extern intsignificant_digits(const char *s);
1616

1717
/* in segscan.l */
1818
externintseg_yylex(void);
19-
externvoidseg_yyerror(SEG*result,constchar*message)pg_attribute_noreturn();
19+
externvoidseg_yyerror(SEG*result,structNode*escontext,
20+
constchar*message);
2021
externvoidseg_scanner_init(constchar*str);
2122
externvoidseg_scanner_finish(void);
2223

2324
/* in segparse.y */
24-
externintseg_yyparse(SEG*result);
25+
externintseg_yyparse(SEG*result,structNode*escontext);

‎contrib/seg/segparse.y‎

Lines changed: 23 additions & 11 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,9 @@
77
#include<math.h>
88

99
#include"fmgr.h"
10+
#include"nodes/miscnodes.h"
1011
#include"utils/builtins.h"
12+
#include"utils/float.h"
1113

1214
#include"segdata.h"
1315

@@ -19,7 +21,7 @@
1921
#defineYYMALLOC palloc
2022
#defineYYFREE pfree
2123

22-
staticfloatseg_atof(constchar *value);
24+
staticboolseg_atof(char *value,float *result,structNode *escontext);
2325

2426
staticintsig_digits(constchar *value);
2527

@@ -35,6 +37,7 @@ static char strbuf[25] = {
3537

3638
/* BISON Declarations*/
3739
%parse-param {SEG *result}
40+
%parse-param {structNode *escontext}
3841
%expect0
3942
%name-prefix="seg_yy"
4043

@@ -77,7 +80,7 @@ range: boundary PLUMIN deviation
7780
result->lower = $1.val;
7881
result->upper = $3.val;
7982
if ( result->lower > result->upper ) {
80-
ereport(ERROR,
83+
errsave(escontext,
8184
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
8285
errmsg("swapped boundaries: %g is greater than %g",
8386
result->lower, result->upper)));
@@ -121,7 +124,10 @@ range: boundary PLUMIN deviation
121124
boundary: SEGFLOAT
122125
{
123126
/* temp variable avoids a gcc 3.3.x bug on Sparc64*/
124-
floatval = seg_atof($1);
127+
floatval;
128+
129+
if (!seg_atof($1, &val, escontext))
130+
YYABORT;
125131

126132
$$.ext ='\0';
127133
$$.sigd =sig_digits($1);
@@ -130,7 +136,10 @@ boundary: SEGFLOAT
130136
| EXTENSION SEGFLOAT
131137
{
132138
/* temp variable avoids a gcc 3.3.x bug on Sparc64*/
133-
floatval = seg_atof($2);
139+
floatval;
140+
141+
if (!seg_atof($2, &val, escontext))
142+
YYABORT;
134143

135144
$$.ext = $1[0];
136145
$$.sigd =sig_digits($2);
@@ -141,7 +150,10 @@ boundary: SEGFLOAT
141150
deviation: SEGFLOAT
142151
{
143152
/* temp variable avoids a gcc 3.3.x bug on Sparc64*/
144-
floatval = seg_atof($1);
153+
floatval;
154+
155+
if (!seg_atof($1, &val, escontext))
156+
YYABORT;
145157

146158
$$.ext ='\0';
147159
$$.sigd =sig_digits($1);
@@ -152,13 +164,13 @@ deviation: SEGFLOAT
152164
%%
153165

154166

155-
staticfloat
156-
seg_atof(constchar *value)
167+
staticbool
168+
seg_atof(char *value,float *result,structNode *escontext)
157169
{
158-
Datumdatum;
159-
160-
datum =DirectFunctionCall1(float4in,CStringGetDatum(value));
161-
returnDatumGetFloat4(datum);
170+
*result =float4in_internal(value,NULL,"seg", value, escontext);
171+
if (SOFT_ERROR_OCCURRED(escontext))
172+
returnfalse;
173+
returntrue;
162174
}
163175

164176
staticint

‎contrib/seg/segscan.l‎

Lines changed: 9 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -4,6 +4,8 @@
44
*/
55
#include "postgres.h"
66

7+
#include "nodes/miscnodes.h"
8+
79
/*
810
* NB: include segparse.h only AFTER including segdata.h, because segdata.h
911
* contains the definition for SEG.
@@ -65,19 +67,23 @@ float ({integer}|{real})([eE]{integer})?
6567
/* LCOV_EXCL_STOP */
6668

6769
void
68-
seg_yyerror(SEG *result,constchar *message)
70+
seg_yyerror(SEG *result,structNode *escontext,constchar *message)
6971
{
72+
/* if we already reported an error, don't overwrite it */
73+
if (SOFT_ERROR_OCCURRED(escontext))
74+
return;
75+
7076
if (*yytext == YY_END_OF_BUFFER_CHAR)
7177
{
72-
ereport(ERROR,
78+
errsave(escontext,
7379
(errcode(ERRCODE_SYNTAX_ERROR),
7480
errmsg("bad seg representation"),
7581
/* translator: %s is typically "syntax error" */
7682
errdetail("%s at end of input", message)));
7783
}
7884
else
7985
{
80-
ereport(ERROR,
86+
errsave(escontext,
8187
(errcode(ERRCODE_SYNTAX_ERROR),
8288
errmsg("bad seg representation"),
8389
/* translator: first %s is typically "syntax error" */

‎contrib/seg/sql/seg.sql‎

Lines changed: 13 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -238,3 +238,16 @@ SELECT * FROM test_seg WHERE s @> '11..11.3' GROUP BY s;
238238
-- Test functions
239239
SELECT seg_lower(s), seg_center(s), seg_upper(s)
240240
FROM test_segWHERE s @>'11.2..11.3'OR s ISNULLORDER BY s;
241+
242+
243+
-- test non error throwing API
244+
245+
SELECT stras seg,
246+
pg_input_is_valid(str,'seg')as ok,
247+
pg_input_error_message(str,'seg')as errmsg
248+
FROM unnest(ARRAY['-1 .. 1'::text,
249+
'100(+-)1',
250+
'',
251+
'ABC',
252+
'1 e7',
253+
'1e700']) str;

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