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Increase the maximum value of extra_float_digits to 3, and have pg_dump

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use that value when the backend is new enough to allow it.  This responds
to bug report from Keh-Cheng Chu pointing out that although 2 extra digits
should be sufficient to dump and restore float8 exactly, it is possible to
need 3 extra digits for float4 values.
This commit is contained in:
Tom Lane
2009-09-11 19:17:04 +00:00
parent 680bf3268c
commit 8c5463a511
6 changed files with 15 additions and 13 deletions
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4
src/backend/utils/misc/guc.c
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@@ -10,7 +10,7 @@
* Written by Peter Eisentraut <peter_e@gmx.net>.
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.516 2009/09/08 17:08:36 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/misc/guc.c,v 1.517 2009/09/11 19:17:03 tgl Exp $
*
*--------------------------------------------------------------------
*/
@@ -1684,7 +1684,7 @@ static struct config_int ConfigureNamesInt[] =
"(FLT_DIG or DBL_DIG as appropriate).")
},
&extra_float_digits,
0, -15, 2, NULL, NULL
0, -15, 3, NULL, NULL
},
{

2
src/backend/utils/misc/postgresql.conf.sample
View File

@@ -445,7 +445,7 @@
# India
# You can create your own file in
# share/timezonesets/.
#extra_float_digits = 0 # min -15, max 2
#extra_float_digits = 0 # min -15, max 3
#client_encoding = sql_ascii # actually, defaults to database
# encoding