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Change the UNKNOWN type to have an internal representation matching

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cstring, rather than text, so as to eliminate useless conversions
inside the parser.  Per recent discussion.
This commit is contained in:
Tom Lane
2005-05-30 01:20:50 +00:00
parent c8f81df41b
commit cfd9be939e
5 changed files with 37 additions and 47 deletions
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49
src/backend/utils/adt/varlena.c
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@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/varlena.c,v 1.122 2005/05/27 00:57:49 neilc Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/varlena.c,v 1.123 2005/05/30 01:20:50 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -330,18 +330,10 @@ textsend(PG_FUNCTION_ARGS)
Datum
unknownin(PG_FUNCTION_ARGS)
{
char *inputStr = PG_GETARG_CSTRING(0);
unknown *result;
int len;
char *str = PG_GETARG_CSTRING(0);
len = strlen(inputStr) + VARHDRSZ;
result = (unknown *) palloc(len);
VARATT_SIZEP(result) = len;
memcpy(VARDATA(result), inputStr, len - VARHDRSZ);
PG_RETURN_UNKNOWN_P(result);
/* representation is same as cstring */
PG_RETURN_CSTRING(pstrdup(str));
}
/*
@ -350,16 +342,10 @@ unknownin(PG_FUNCTION_ARGS)
Datum
unknownout(PG_FUNCTION_ARGS)
{
unknown *t = PG_GETARG_UNKNOWN_P(0);
int len;
char *result;
/* representation is same as cstring */
char *str = PG_GETARG_CSTRING(0);
len = VARSIZE(t) - VARHDRSZ;
result = (char *) palloc(len + 1);
memcpy(result, VARDATA(t), len);
result[len] = '\0';
PG_RETURN_CSTRING(result);
PG_RETURN_CSTRING(pstrdup(str));
}
/*
@ -369,28 +355,27 @@ Datum
unknownrecv(PG_FUNCTION_ARGS)
{
StringInfo buf = (StringInfo) PG_GETARG_POINTER(0);
unknown *result;
char *str;
int nbytes;
nbytes = buf->len - buf->cursor;
result = (unknown *) palloc(nbytes + VARHDRSZ);
VARATT_SIZEP(result) = nbytes + VARHDRSZ;
pq_copymsgbytes(buf, VARDATA(result), nbytes);
PG_RETURN_UNKNOWN_P(result);
str = pq_getmsgtext(buf, buf->len - buf->cursor, &nbytes);
/* representation is same as cstring */
PG_RETURN_CSTRING(str);
}
/*
* unknownsend - converts unknown to binary format
*
* This is a special case: just copy the input, since it's
* effectively the same format as bytea
*/
Datum
unknownsend(PG_FUNCTION_ARGS)
{
unknown *vlena = PG_GETARG_UNKNOWN_P_COPY(0);
/* representation is same as cstring */
char *str = PG_GETARG_CSTRING(0);
StringInfoData buf;
PG_RETURN_UNKNOWN_P(vlena);
pq_begintypsend(&buf);
pq_sendtext(&buf, str, strlen(str));
PG_RETURN_BYTEA_P(pq_endtypsend(&buf));
}