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-rw-r--r--src/backend/utils/adt/datetime.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/backend/utils/adt/datetime.c b/src/backend/utils/adt/datetime.c
index d1666138958..b74889039d8 100644
--- a/src/backend/utils/adt/datetime.c
+++ b/src/backend/utils/adt/datetime.c
@@ -3376,7 +3376,7 @@ DecodeInterval(char **field, int *ftype, int nf, int range,
* to dump in postgres style, not SQL style.)
*----------
*/
- if (IntervalStyle == INTSTYLE_SQL_STANDARD && *field[0] == '-')
+ if (IntervalStyle == INTSTYLE_SQL_STANDARD && nf > 0 && *field[0] == '-')
{
force_negative = true;
/* Check for additional explicit signs */