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Commiteba4184

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committed
Clarify maximum tuple and max attribute lengths.
1 parentb31aa64 commiteba4184

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4 files changed

+18
-16
lines changed

4 files changed

+18
-16
lines changed

‎src/backend/parser/gram.y

Lines changed: 3 additions & 3 deletions
Original file line numberDiff line numberDiff line change
@@ -10,7 +10,7 @@
1010
*
1111
*
1212
* IDENTIFICATION
13-
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.85 1999/07/03 00:32:44 momjian Exp $
13+
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.86 1999/07/04 04:55:59 momjian Exp $
1414
*
1515
* HISTORY
1616
* AUTHORDATEMAJOR EVENT
@@ -3385,9 +3385,9 @@ Character: character '(' Iconst ')'
33853385

33863386
if ($3 < 1)
33873387
elog(ERROR,"length for '%s' type must be at least 1",$1);
3388-
else if ($3 >MaxTupleSize)
3388+
else if ($3 >MaxAttrSize)
33893389
elog(ERROR,"length for type '%s' cannot exceed %d",$1,
3390-
MaxTupleSize);
3390+
MaxAttrSize);
33913391

33923392
/* we actually implement this sort of like a varlen, so
33933393
* the first 4 bytes is the length. (the difference

‎src/backend/utils/adt/varchar.c

Lines changed: 9 additions & 9 deletions
Original file line numberDiff line numberDiff line change
@@ -7,7 +7,7 @@
77
*
88
*
99
* IDENTIFICATION
10-
* $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.47 1999/07/03 00:32:50 momjian Exp $
10+
* $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.48 1999/07/04 04:56:00 momjian Exp $
1111
*
1212
*-------------------------------------------------------------------------
1313
*/
@@ -82,9 +82,9 @@ bpcharin(char *s, int dummy, int32 atttypmod)
8282
else
8383
len=atttypmod-VARHDRSZ;
8484

85-
if (len>MaxTupleSize)
85+
if (len>MaxAttrSize)
8686
elog(ERROR,"bpcharin: length of char() must be less than %d",
87-
MaxTupleSize);
87+
MaxAttrSize);
8888

8989
result= (char*)palloc(atttypmod);
9090
VARSIZE(result)=atttypmod;
@@ -153,9 +153,9 @@ bpchar(char *s, int32 len)
153153

154154
rlen=len-VARHDRSZ;
155155

156-
if (rlen>MaxTupleSize)
156+
if (rlen>MaxAttrSize)
157157
elog(ERROR,"bpchar: length of char() must be less than %d",
158-
MaxTupleSize);
158+
MaxAttrSize);
159159

160160
#ifdefSTRINGDEBUG
161161
printf("bpchar- convert string length %d (%d) ->%d (%d)\n",
@@ -335,9 +335,9 @@ varcharin(char *s, int dummy, int32 atttypmod)
335335
if (atttypmod!=-1&&len>atttypmod)
336336
len=atttypmod;/* clip the string at max length */
337337

338-
if (len>MaxTupleSize)
338+
if (len>MaxAttrSize)
339339
elog(ERROR,"varcharin: length of char() must be less than %d",
340-
MaxTupleSize);
340+
MaxAttrSize);
341341

342342
result= (char*)palloc(len);
343343
VARSIZE(result)=len;
@@ -407,9 +407,9 @@ varchar(char *s, int32 slen)
407407
len=slen-VARHDRSZ;
408408
#endif
409409

410-
if (len>MaxTupleSize)
410+
if (len>MaxAttrSize)
411411
elog(ERROR,"varchar: length of varchar() must be less than %d",
412-
MaxTupleSize);
412+
MaxAttrSize);
413413

414414
result= (char*)palloc(slen);
415415
VARSIZE(result)=slen;

‎src/include/access/htup.h

Lines changed: 4 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -6,7 +6,7 @@
66
*
77
* Copyright (c) 1994, Regents of the University of California
88
*
9-
* $Id: htup.h,v 1.18 1999/07/03 01:57:53 momjian Exp $
9+
* $Id: htup.h,v 1.19 1999/07/04 04:56:01 momjian Exp $
1010
*
1111
*-------------------------------------------------------------------------
1212
*/
@@ -56,7 +56,9 @@ typedef HeapTupleHeaderData *HeapTupleHeader;
5656
#defineMinTupleSize(DOUBLEALIGN(sizeof (PageHeaderData) + \
5757
sizeof(HeapTupleHeaderData) + sizeof(int4)))
5858

59-
#defineMaxTupleSize(BLCKSZ/2 - MinTupleSize)
59+
#defineMaxTupleSize(BLCKSZ - MinTupleSize)
60+
61+
#defineMaxAttrSize(MaxTupleSize - sizeof(HeapTupleHeaderData))
6062

6163
#defineSelfItemPointerAttributeNumber(-1)
6264
#defineObjectIdAttributeNumber(-2)

‎src/interfaces/ecpg/preproc/preproc.y

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -3354,8 +3354,8 @@ Character: character '(' Iconst ')'
33543354
sprintf(errortext,"length for '%s' type must be at least 1",$1);
33553355
yyerror(errortext);
33563356
}
3357-
elseif (atol($3) >MaxTupleSize) {
3358-
sprintf(errortext,"length for type '%s' cannot exceed %d",$1,MaxTupleSize);
3357+
elseif (atol($3) >MaxAttrSize) {
3358+
sprintf(errortext,"length for type '%s' cannot exceed %d",$1,MaxAttrSize);
33593359
yyerror(errortext);
33603360
}
33613361

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