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intarray: return empty zero-dimensional array for an empty array

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Previously a one-dimensional empty array was returned, but its text
representation matched a zero-dimensional array, and there is no way to
dump/reload a one-dimensional empty array.

BACKWARD INCOMPATIBILITY

Per report from elein
This commit is contained in:
Bruce Momjian 2013-09-07 11:44:33 -04:00
parent b8104730c8
commit c155f654b4
1 changed files with 7 additions and 0 deletions
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7
contrib/intarray/_int_tool.c
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@ -246,6 +246,13 @@ resize_intArrayType(ArrayType *a, int num)
int nbytes = ARR_DATA_OFFSET(a) + sizeof(int) * num; int nbytes = ARR_DATA_OFFSET(a) + sizeof(int) * num;
int i; int i;
/* if no elements, return a zero-dimensional array */
if (num == 0)
{
ARR_NDIM(a) = 0;
return a;
}
if (num == ARRNELEMS(a)) if (num == ARRNELEMS(a))
return a; return a;