diff options
| -rw-r--r-- | doc/src/sgml/array.sgml | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/doc/src/sgml/array.sgml b/doc/src/sgml/array.sgml index b1e0b293107..9b0e658d81a 100644 --- a/doc/src/sgml/array.sgml +++ b/doc/src/sgml/array.sgml @@ -1,4 +1,4 @@ -<!-- $PostgreSQL: pgsql/doc/src/sgml/array.sgml,v 1.62 2007/06/07 14:49:56 tgl Exp $ --> +<!-- $PostgreSQL: pgsql/doc/src/sgml/array.sgml,v 1.63 2008/03/26 14:43:20 momjian Exp $ --> <sect1 id="arrays"> <title>Arrays</title> @@ -258,6 +258,9 @@ SELECT schedule[1:2][2] FROM sal_emp WHERE name = 'Bill'; {{meeting,lunch},{training,presentation}} (1 row) </programlisting> + + To avoid confusion with slices, use slice syntax for all dimmension + references, e.g. <literal>[1:2][1:1]</>, not <literal>[2][1:1]</>. </para> <para> @@ -275,7 +278,8 @@ SELECT schedule[1:2][2] FROM sal_emp WHERE name = 'Bill'; any of the subscript expressions are null. However, in other corner cases such as selecting an array slice that is completely outside the current array bounds, a slice expression - yields an empty (zero-dimensional) array instead of null. + yields an empty (zero-dimensional) array instead of null. (This + does not match non-slice behavior and is done for historical reasons.) If the requested slice partially overlaps the array bounds, then it is silently reduced to just the overlapping region. </para> |