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Use wrappers of PG_DETOAST_DATUM_PACKED() more.

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This makes almost all core code follow the policy introduced in the
previous commit.  Specific decisions:

- Text search support functions with char* and length arguments, such as
  prsstart and lexize, may receive unaligned strings.  I doubt
  maintainers of non-core text search code will notice.

- Use plain VARDATA() on values detoasted or synthesized earlier in the
  same function.  Use VARDATA_ANY() on varlenas sourced outside the
  function, even if they happen to always have four-byte headers.  As an
  exception, retain the universal practice of using VARDATA() on return
  values of SendFunctionCall().

- Retain PG_GETARG_BYTEA_P() in pageinspect.  (Page images are too large
  for a one-byte header, so this misses no optimization.)  Sites that do
  not call get_page_from_raw() typically need the four-byte alignment.

- For now, do not change btree_gist.  Its use of four-byte headers in
  memory is partly entangled with storage of 4-byte headers inside
  GBT_VARKEY, on disk.

- For now, do not change gtrgm_consistent() or gtrgm_distance().  They
  incorporate the varlena header into a cache, and there are multiple
  credible implementation strategies to consider.
This commit is contained in:
Noah Misch
2017-03-12 19:35:34 -04:00
parent 9d7726c2ba
commit 3a0d473192
59 changed files with 521 additions and 529 deletions
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44
src/backend/utils/adt/numeric.c
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@@ -3601,7 +3601,7 @@ numeric_avg_serialize(PG_FUNCTION_ARGS)
temp = DirectFunctionCall1(numeric_send,
NumericGetDatum(make_result(&tmp_var)));
sumX = DatumGetByteaP(temp);
sumX = DatumGetByteaPP(temp);
free_var(&tmp_var);
pq_begintypsend(&buf);
@@ -3610,7 +3610,7 @@ numeric_avg_serialize(PG_FUNCTION_ARGS)
pq_sendint64(&buf, state->N);
/* sumX */
pq_sendbytes(&buf, VARDATA(sumX), VARSIZE(sumX) - VARHDRSZ);
pq_sendbytes(&buf, VARDATA_ANY(sumX), VARSIZE_ANY_EXHDR(sumX));
/* maxScale */
pq_sendint(&buf, state->maxScale, 4);
@@ -3643,14 +3643,15 @@ numeric_avg_deserialize(PG_FUNCTION_ARGS)
if (!AggCheckCallContext(fcinfo, NULL))
elog(ERROR, "aggregate function called in non-aggregate context");
sstate = PG_GETARG_BYTEA_P(0);
sstate = PG_GETARG_BYTEA_PP(0);
/*
* Copy the bytea into a StringInfo so that we can "receive" it using the
* standard recv-function infrastructure.
*/
initStringInfo(&buf);
appendBinaryStringInfo(&buf, VARDATA(sstate), VARSIZE(sstate) - VARHDRSZ);
appendBinaryStringInfo(&buf,
VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
result = makeNumericAggStateCurrentContext(false);
@@ -3713,12 +3714,12 @@ numeric_serialize(PG_FUNCTION_ARGS)
accum_sum_final(&state->sumX, &tmp_var);
temp = DirectFunctionCall1(numeric_send,
NumericGetDatum(make_result(&tmp_var)));
sumX = DatumGetByteaP(temp);
sumX = DatumGetByteaPP(temp);
accum_sum_final(&state->sumX2, &tmp_var);
temp = DirectFunctionCall1(numeric_send,
NumericGetDatum(make_result(&tmp_var)));
sumX2 = DatumGetByteaP(temp);
sumX2 = DatumGetByteaPP(temp);
free_var(&tmp_var);
@@ -3728,10 +3729,10 @@ numeric_serialize(PG_FUNCTION_ARGS)
pq_sendint64(&buf, state->N);
/* sumX */
pq_sendbytes(&buf, VARDATA(sumX), VARSIZE(sumX) - VARHDRSZ);
pq_sendbytes(&buf, VARDATA_ANY(sumX), VARSIZE_ANY_EXHDR(sumX));
/* sumX2 */
pq_sendbytes(&buf, VARDATA(sumX2), VARSIZE(sumX2) - VARHDRSZ);
pq_sendbytes(&buf, VARDATA_ANY(sumX2), VARSIZE_ANY_EXHDR(sumX2));
/* maxScale */
pq_sendint(&buf, state->maxScale, 4);
@@ -3765,14 +3766,15 @@ numeric_deserialize(PG_FUNCTION_ARGS)
if (!AggCheckCallContext(fcinfo, NULL))
elog(ERROR, "aggregate function called in non-aggregate context");
sstate = PG_GETARG_BYTEA_P(0);
sstate = PG_GETARG_BYTEA_PP(0);
/*
* Copy the bytea into a StringInfo so that we can "receive" it using the
* standard recv-function infrastructure.
*/
initStringInfo(&buf);
appendBinaryStringInfo(&buf, VARDATA(sstate), VARSIZE(sstate) - VARHDRSZ);
appendBinaryStringInfo(&buf,
VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
result = makeNumericAggStateCurrentContext(false);
@@ -4114,7 +4116,7 @@ numeric_poly_serialize(PG_FUNCTION_ARGS)
#endif
temp = DirectFunctionCall1(numeric_send,
NumericGetDatum(make_result(&num)));
sumX = DatumGetByteaP(temp);
sumX = DatumGetByteaPP(temp);
#ifdef HAVE_INT128
int128_to_numericvar(state->sumX2, &num);
@@ -4123,7 +4125,7 @@ numeric_poly_serialize(PG_FUNCTION_ARGS)
#endif
temp = DirectFunctionCall1(numeric_send,
NumericGetDatum(make_result(&num)));
sumX2 = DatumGetByteaP(temp);
sumX2 = DatumGetByteaPP(temp);
free_var(&num);
}
@@ -4134,10 +4136,10 @@ numeric_poly_serialize(PG_FUNCTION_ARGS)
pq_sendint64(&buf, state->N);
/* sumX */
pq_sendbytes(&buf, VARDATA(sumX), VARSIZE(sumX) - VARHDRSZ);
pq_sendbytes(&buf, VARDATA_ANY(sumX), VARSIZE_ANY_EXHDR(sumX));
/* sumX2 */
pq_sendbytes(&buf, VARDATA(sumX2), VARSIZE(sumX2) - VARHDRSZ);
pq_sendbytes(&buf, VARDATA_ANY(sumX2), VARSIZE_ANY_EXHDR(sumX2));
result = pq_endtypsend(&buf);
@@ -4163,14 +4165,15 @@ numeric_poly_deserialize(PG_FUNCTION_ARGS)
if (!AggCheckCallContext(fcinfo, NULL))
elog(ERROR, "aggregate function called in non-aggregate context");
sstate = PG_GETARG_BYTEA_P(0);
sstate = PG_GETARG_BYTEA_PP(0);
/*
* Copy the bytea into a StringInfo so that we can "receive" it using the
* standard recv-function infrastructure.
*/
initStringInfo(&buf);
appendBinaryStringInfo(&buf, VARDATA(sstate), VARSIZE(sstate) - VARHDRSZ);
appendBinaryStringInfo(&buf,
VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
result = makePolyNumAggStateCurrentContext(false);
@@ -4338,7 +4341,7 @@ int8_avg_serialize(PG_FUNCTION_ARGS)
#endif
temp = DirectFunctionCall1(numeric_send,
NumericGetDatum(make_result(&num)));
sumX = DatumGetByteaP(temp);
sumX = DatumGetByteaPP(temp);
free_var(&num);
}
@@ -4349,7 +4352,7 @@ int8_avg_serialize(PG_FUNCTION_ARGS)
pq_sendint64(&buf, state->N);
/* sumX */
pq_sendbytes(&buf, VARDATA(sumX), VARSIZE(sumX) - VARHDRSZ);
pq_sendbytes(&buf, VARDATA_ANY(sumX), VARSIZE_ANY_EXHDR(sumX));
result = pq_endtypsend(&buf);
@@ -4372,14 +4375,15 @@ int8_avg_deserialize(PG_FUNCTION_ARGS)
if (!AggCheckCallContext(fcinfo, NULL))
elog(ERROR, "aggregate function called in non-aggregate context");
sstate = PG_GETARG_BYTEA_P(0);
sstate = PG_GETARG_BYTEA_PP(0);
/*
* Copy the bytea into a StringInfo so that we can "receive" it using the
* standard recv-function infrastructure.
*/
initStringInfo(&buf);
appendBinaryStringInfo(&buf, VARDATA(sstate), VARSIZE(sstate) - VARHDRSZ);
appendBinaryStringInfo(&buf,
VARDATA_ANY(sstate), VARSIZE_ANY_EXHDR(sstate));
result = makePolyNumAggStateCurrentContext(false);