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| author | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-25 22:21:55 +0000 |
|---|---|---|
| committer | Tom Lane <tgl@sss.pgh.pa.us> | 2007-09-25 22:21:55 +0000 |
| commit | f828f878e96b83cc50569305e2f2eccfde1e8181 (patch) | |
| tree | 35ba9fbb88249091cafc9bf8d379d3e5856eeade /src/include/utils/numeric.h | |
| parent | 7a315a09dc0f7a1f903b89022a2a833c1719145b (diff) | |
| download | postgresql-f828f878e96b83cc50569305e2f2eccfde1e8181.tar.gz | |
Change on-disk representation of NUMERIC datatype so that the sign_dscale
word comes before the weight instead of after. This will allow future
binary-compatible extension of the representation to support compact formats,
as discussed on pgsql-hackers around 2007/06/18. The reason to do it now is
that we've already pretty well broken any chance of simple in-place upgrade
from 8.2 to 8.3, but it's possible that 8.3 to 8.4 (or whenever we get around
to squeezing NUMERIC) could otherwise be data-compatible.
Diffstat (limited to 'src/include/utils/numeric.h')
| -rw-r--r-- | src/include/utils/numeric.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/src/include/utils/numeric.h b/src/include/utils/numeric.h index cffba1e164..e14251591e 100644 --- a/src/include/utils/numeric.h +++ b/src/include/utils/numeric.h @@ -7,7 +7,7 @@ * * Copyright (c) 1998-2007, PostgreSQL Global Development Group * - * $PostgreSQL: pgsql/src/include/utils/numeric.h,v 1.24 2007/02/27 23:48:10 tgl Exp $ + * $PostgreSQL: pgsql/src/include/utils/numeric.h,v 1.25 2007/09/25 22:21:55 tgl Exp $ * *------------------------------------------------------------------------- */ @@ -63,14 +63,14 @@ typedef struct NumericData { int32 vl_len_; /* varlena header (do not touch directly!) */ - int16 n_weight; /* Weight of 1st digit */ uint16 n_sign_dscale; /* Sign + display scale */ + int16 n_weight; /* Weight of 1st digit */ char n_data[1]; /* Digits (really array of NumericDigit) */ } NumericData; typedef NumericData *Numeric; -#define NUMERIC_HDRSZ (VARHDRSZ + sizeof(int16) + sizeof(uint16)) +#define NUMERIC_HDRSZ (VARHDRSZ + sizeof(uint16) + sizeof(int16)) /* |