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Clarify maximum tuple and max attribute lengths.

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This commit is contained in:
Bruce Momjian 1999-07-04 04:56:02 +00:00
parent b31aa64f4a
commit eba41848aa
4 changed files with 18 additions and 16 deletions
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6
src/backend/parser/gram.y
View File

@ -10,7 +10,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.85 1999/07/03 00:32:44 momjian Exp $ * $Header: /cvsroot/pgsql/src/backend/parser/gram.y,v 2.86 1999/07/04 04:55:59 momjian Exp $
* *
* HISTORY * HISTORY
* AUTHOR DATE MAJOR EVENT * AUTHOR DATE MAJOR EVENT
@ -3385,9 +3385,9 @@ Character: character '(' Iconst ')'
if ($3 < 1) if ($3 < 1)
elog(ERROR,"length for '%s' type must be at least 1",$1); elog(ERROR,"length for '%s' type must be at least 1",$1);
else if ($3 > MaxTupleSize) else if ($3 > MaxAttrSize)
elog(ERROR,"length for type '%s' cannot exceed %d",$1, elog(ERROR,"length for type '%s' cannot exceed %d",$1,
MaxTupleSize); MaxAttrSize);
/* we actually implement this sort of like a varlen, so /* we actually implement this sort of like a varlen, so
* the first 4 bytes is the length. (the difference * the first 4 bytes is the length. (the difference

18
src/backend/utils/adt/varchar.c
View File

@ -7,7 +7,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.47 1999/07/03 00:32:50 momjian Exp $ * $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.48 1999/07/04 04:56:00 momjian Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -82,9 +82,9 @@ bpcharin(char *s, int dummy, int32 atttypmod)
else else
len = atttypmod - VARHDRSZ; len = atttypmod - VARHDRSZ;
if (len > MaxTupleSize) if (len > MaxAttrSize)
elog(ERROR, "bpcharin: length of char() must be less than %d", elog(ERROR, "bpcharin: length of char() must be less than %d",
MaxTupleSize); MaxAttrSize);
result = (char *) palloc(atttypmod); result = (char *) palloc(atttypmod);
VARSIZE(result) = atttypmod; VARSIZE(result) = atttypmod;
@ -153,9 +153,9 @@ bpchar(char *s, int32 len)
rlen = len - VARHDRSZ; rlen = len - VARHDRSZ;
if (rlen > MaxTupleSize) if (rlen > MaxAttrSize)
elog(ERROR, "bpchar: length of char() must be less than %d", elog(ERROR, "bpchar: length of char() must be less than %d",
MaxTupleSize); MaxAttrSize);
#ifdef STRINGDEBUG #ifdef STRINGDEBUG
printf("bpchar- convert string length %d (%d) ->%d (%d)\n", printf("bpchar- convert string length %d (%d) ->%d (%d)\n",
@ -335,9 +335,9 @@ varcharin(char *s, int dummy, int32 atttypmod)
if (atttypmod != -1 && len > atttypmod) if (atttypmod != -1 && len > atttypmod)
len = atttypmod; /* clip the string at max length */ len = atttypmod; /* clip the string at max length */
if (len > MaxTupleSize) if (len > MaxAttrSize)
elog(ERROR, "varcharin: length of char() must be less than %d", elog(ERROR, "varcharin: length of char() must be less than %d",
MaxTupleSize); MaxAttrSize);
result = (char *) palloc(len); result = (char *) palloc(len);
VARSIZE(result) = len; VARSIZE(result) = len;
@ -407,9 +407,9 @@ varchar(char *s, int32 slen)
len = slen - VARHDRSZ; len = slen - VARHDRSZ;
#endif #endif
if (len > MaxTupleSize) if (len > MaxAttrSize)
elog(ERROR, "varchar: length of varchar() must be less than %d", elog(ERROR, "varchar: length of varchar() must be less than %d",
MaxTupleSize); MaxAttrSize);
result = (char *) palloc(slen); result = (char *) palloc(slen);
VARSIZE(result) = slen; VARSIZE(result) = slen;

6
src/include/access/htup.h
View File

@ -6,7 +6,7 @@
* *
* Copyright (c) 1994, Regents of the University of California * Copyright (c) 1994, Regents of the University of California
* *
* $Id: htup.h,v 1.18 1999/07/03 01:57:53 momjian Exp $ * $Id: htup.h,v 1.19 1999/07/04 04:56:01 momjian Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -56,7 +56,9 @@ typedef HeapTupleHeaderData *HeapTupleHeader;
#define MinTupleSize (DOUBLEALIGN(sizeof (PageHeaderData) + \ #define MinTupleSize (DOUBLEALIGN(sizeof (PageHeaderData) + \
sizeof(HeapTupleHeaderData) + sizeof(int4))) sizeof(HeapTupleHeaderData) + sizeof(int4)))
#define MaxTupleSize (BLCKSZ/2 - MinTupleSize) #define MaxTupleSize (BLCKSZ - MinTupleSize)
#define MaxAttrSize (MaxTupleSize - sizeof(HeapTupleHeaderData))
#define SelfItemPointerAttributeNumber (-1) #define SelfItemPointerAttributeNumber (-1)
#define ObjectIdAttributeNumber (-2) #define ObjectIdAttributeNumber (-2)

4
src/interfaces/ecpg/preproc/preproc.y
View File

@ -3354,8 +3354,8 @@ Character: character '(' Iconst ')'
sprintf(errortext, "length for '%s' type must be at least 1",$1); sprintf(errortext, "length for '%s' type must be at least 1",$1);
yyerror(errortext); yyerror(errortext);
} }
else if (atol($3) > MaxTupleSize) { else if (atol($3) > MaxAttrSize) {
sprintf(errortext, "length for type '%s' cannot exceed %d",$1,MaxTupleSize); sprintf(errortext, "length for type '%s' cannot exceed %d",$1,MaxAttrSize);
yyerror(errortext); yyerror(errortext);
} }