Remove unnecessary limitations on lengths of bpchar and varchar constants.

Since we detect oversize tuples elsewhere, I see no reason not to allow
string constants that are 'too long' --- after all, they might never get
stored in a tuple at all.

diff --git a/src/backend/utils/adt/varchar.c b/src/backend/utils/adt/varchar.c
index eb3f165..8028f0b 100644 (file)
--- a/src/backend/utils/adt/varchar.c
+++ b/src/backend/utils/adt/varchar.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *       $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.58 2000/01/26 05:57:14 momjian Exp $
+ *       $Header: /cvsroot/pgsql/src/backend/utils/adt/varchar.c,v 1.59 2000/03/13 01:54:07 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -71,22 +71,15 @@ bpcharin(char *s, int dummy, int32 atttypmod)
        if (s == NULL)
                return (char *) NULL;
 
-       if (atttypmod == -1)
+       if (atttypmod < (int32) VARHDRSZ)
        {
-
-               /*
-                * this is here because some functions can't supply the atttypmod
-                */
+               /* If typmod is -1 (or invalid), use the actual string length */
                len = strlen(s);
                atttypmod = len + VARHDRSZ;
        }
        else
                len = atttypmod - VARHDRSZ;
 
-       if (len > MaxAttrSize)
-               elog(ERROR, "bpcharin: length of char() must be less than %ld",
-                               MaxAttrSize);
-
        result = (char *) palloc(atttypmod);
        VARSIZE(result) = atttypmod;
        r = VARDATA(result);
@@ -149,15 +142,12 @@ bpchar(char *s, int32 len)
        if (s == NULL)
                return (char *) NULL;
 
-       if ((len == -1) || (len == VARSIZE(s)))
+       /* No work if typmod is invalid or supplied data matches it already */
+       if (len < (int32) VARHDRSZ || len == VARSIZE(s))
                return s;
 
        rlen = len - VARHDRSZ;
 
-       if (rlen > MaxAttrSize)
-               elog(ERROR, "bpchar: length of char() must be less than %ld",
-                       MaxAttrSize);
-
 #ifdef STRINGDEBUG
        printf("bpchar- convert string length %d (%d) ->%d (%d)\n",
                   VARSIZE(s) - VARHDRSZ, VARSIZE(s), rlen, len);
@@ -333,13 +323,9 @@ varcharin(char *s, int dummy, int32 atttypmod)
                return (char *) NULL;
 
        len = strlen(s) + VARHDRSZ;
-       if (atttypmod != -1 && len > atttypmod)
+       if (atttypmod >= (int32) VARHDRSZ && len > atttypmod)
                len = atttypmod;                /* clip the string at max length */
 
-       if (len > MaxAttrSize)
-               elog(ERROR, "varcharin: length of char() must be less than %ld",
-                               MaxAttrSize);
-
        result = (char *) palloc(len);
        VARSIZE(result) = len;
        strncpy(VARDATA(result), s, len - VARHDRSZ);
@@ -391,7 +377,7 @@ varchar(char *s, int32 slen)
                return (char *) NULL;
 
        len = VARSIZE(s);
-       if ((slen == -1) || (len <= slen))
+       if (slen < (int32) VARHDRSZ || len <= slen)
                return (char *) s;
 
        /* only reach here if we need to truncate string... */
@@ -408,10 +394,6 @@ varchar(char *s, int32 slen)
        len = slen - VARHDRSZ;
 #endif
 
-       if (len > MaxAttrSize)
-               elog(ERROR, "varchar: length of varchar() must be less than %ld",
-                       MaxAttrSize);
-
        result = (char *) palloc(slen);
        VARSIZE(result) = slen;
        strncpy(VARDATA(result), VARDATA(s), len);