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Commit368b7c6

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Fix numeric abbreviation for --disable-float8-byval.
When committingabd94bc, I tried to makeit decide what kind of abbreviation to use based only on SIZEOF_DATUM,without regard to USE_FLOAT8_BYVAL. That attempt was a few bricks shortof a load, so try to fix it, and add a comment explaining what we'reabout.Patch by me; review (but not a full endorsement) by Andrew Gierth.
1 parentb7e1652 commit368b7c6

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+14
-6
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1 file changed

+14
-6
lines changed

‎src/backend/utils/adt/numeric.c‎

Lines changed: 14 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -296,13 +296,21 @@ typedef struct
296296
hyperLogLogStateabbr_card;/* cardinality estimator */
297297
}NumericSortSupport;
298298

299+
/*
300+
* We define our own macros for packing and unpacking abbreviated-key
301+
* representations for numeric values in order to avoid depending on
302+
* USE_FLOAT8_BYVAL. The type of abbreviation we use is based only on
303+
* the size of a datum, not the argument-passing convention for float8.
304+
*/
299305
#defineNUMERIC_ABBREV_BITS (SIZEOF_DATUM * BITS_PER_BYTE)
300306
#ifSIZEOF_DATUM==8
301-
#defineDatumGetNumericAbbrev(d) ((int64) d)
302-
#defineNUMERIC_ABBREV_NAN Int64GetDatum(PG_INT64_MIN)
307+
#defineNumericAbbrevGetDatum(X) ((Datum) SET_8_BYTES(X))
308+
#defineDatumGetNumericAbbrev(X) ((int64) GET_8_BYTES(X))
309+
#defineNUMERIC_ABBREV_NAN NumericAbbrevGetDatum(PG_INT64_MIN)
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#else
304-
#defineDatumGetNumericAbbrev(d) ((int32) d)
305-
#defineNUMERIC_ABBREV_NAN Int32GetDatum(PG_INT32_MIN)
311+
#defineNumericAbbrevGetDatum(X) ((Datum) SET_4_BYTES(X))
312+
#defineDatumGetNumericAbbrev(X) ((int32) GET_4_BYTES(X))
313+
#defineNUMERIC_ABBREV_NAN NumericAbbrevGetDatum(PG_INT32_MIN)
306314
#endif
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308316

@@ -1883,7 +1891,7 @@ numeric_abbrev_convert_var(NumericVar *var, NumericSortSupport *nss)
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addHyperLogLog(&nss->abbr_card,DatumGetUInt32(hash_uint32(tmp)));
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}
18851893

1886-
returnInt64GetDatum(result);
1894+
returnNumericAbbrevGetDatum(result);
18871895
}
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18891897
#endif/* NUMERIC_ABBREV_BITS == 64 */
@@ -1960,7 +1968,7 @@ numeric_abbrev_convert_var(NumericVar *var, NumericSortSupport *nss)
19601968
addHyperLogLog(&nss->abbr_card,DatumGetUInt32(hash_uint32(tmp)));
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}
19621970

1963-
returnInt32GetDatum(result);
1971+
returnNumericAbbrevGetDatum(result);
19641972
}
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19661974
#endif/* NUMERIC_ABBREV_BITS == 32 */

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