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Commit950b6ab

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Fixes: Using LIKE or ~ operator on text type files which are null valued
 causes segmentation fault.Thanks to: Salvador Ortiz Garcia, Robert Patrick, Paul 'Shag' Walmsley, and James Cooper for finding and fixing the problem.
1 parent25bb718 commit950b6ab

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2 files changed

+8
-2
lines changed

2 files changed

+8
-2
lines changed

‎src/backend/utils/adt/like.c‎

Lines changed: 3 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -120,6 +120,7 @@ char16nlike(char *s, struct varlena *p)
120120
bool
121121
namelike(NameData*n,structvarlena*p)
122122
{
123+
if (!n)return FALSE;
123124
return (fixedlen_like(n->data,p,NAMEDATALEN));
124125
}
125126

@@ -132,6 +133,7 @@ namenlike(NameData *s, struct varlena *p)
132133
bool
133134
textlike(structvarlena*s,structvarlena*p)
134135
{
136+
if (!s)return FALSE;
135137
return (fixedlen_like(VARDATA(s),p,VARSIZE(s)-VARHDRSZ));
136138
}
137139

@@ -141,7 +143,7 @@ bool textnlike(struct varlena *s, struct varlena *p)
141143
}
142144

143145

144-
/* $Revision: 1.1.1.1 $
146+
/* $Revision: 1.2 $
145147
** "like.c" A first attempt at a LIKE operator for Postgres95.
146148
**
147149
** Originally written by Rich $alz, mirror!rs, Wed Nov 26 19:03:17 EST 1986.

‎src/backend/utils/adt/regexp.c‎

Lines changed: 5 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
*
88
*
99
* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regexp.c,v 1.1.1.1 1996/07/09 06:22:05 scrappy Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/utils/adt/regexp.c,v 1.2 1996/07/09 06:39:19 scrappy Exp $
1111
*
1212
* Alistair Crooks added the code for the regex caching
1313
*agc - cached the regular expressions used - there's a good chance
@@ -240,6 +240,7 @@ char16regexne(char *s, struct varlena *p)
240240
bool
241241
nameregexeq(NameData*n,structvarlena*p)
242242
{
243+
if (!n)return FALSE;
243244
return (fixedlen_regexeq(n->data,p,NAMEDATALEN,REG_EXTENDED));
244245
}
245246
bool
@@ -251,6 +252,7 @@ nameregexne(NameData *s, struct varlena *p)
251252
bool
252253
textregexeq(structvarlena*s,structvarlena*p)
253254
{
255+
if (!s)return (FALSE);
254256
return (fixedlen_regexeq(VARDATA(s),p,VARSIZE(s)-VARHDRSZ,REG_EXTENDED));
255257
}
256258

@@ -319,6 +321,7 @@ char16icregexne(char *s, struct varlena *p)
319321
bool
320322
texticregexeq(structvarlena*s,structvarlena*p)
321323
{
324+
if (!s)return FALSE;
322325
return (fixedlen_regexeq(VARDATA(s),p,VARSIZE(s)-VARHDRSZ,
323326
REG_ICASE |REG_EXTENDED));
324327
}
@@ -332,6 +335,7 @@ texticregexne(struct varlena *s, struct varlena *p)
332335
bool
333336
nameicregexeq(NameData*n,structvarlena*p)
334337
{
338+
if (!n)return FALSE;
335339
return (fixedlen_regexeq(n->data,p,NAMEDATALEN,
336340
REG_ICASE |REG_EXTENDED));
337341
}

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