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

Sat, 7 Sep 2013 15:44:33 +0000 (11:44 -0400)

committer Bruce Momjian <bruce@momjian.us>

Sat, 7 Sep 2013 15:44:33 +0000 (11:44 -0400)

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

contrib/intarray/_int_tool.c patch | blob | blame | history

diff --git a/contrib/intarray/_int_tool.c b/contrib/intarray/_int_tool.c

index 863557672ee33e612b1a8780f8bb8df1cdbb7a20..fc462b20766054cff68fb6e0b345db58a77eacc8 100644 (file)

--- a/contrib/intarray/_int_tool.c

+++ b/contrib/intarray/_int_tool.c

@@ -246,6 +246,13 @@ resize_intArrayType(ArrayType *a, int num)

int nbytes = ARR_DATA_OFFSET(a) + sizeof(int) * num;

int i;

+ /* if no elements, return a zero-dimensional array */

+ if (num == 0)

+ {

+ ARR_NDIM(a) = 0;

+ return a;

+ }

if (num == ARRNELEMS(a))

return a;

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