pgsql: array_length() function, and for SQL compatibility also - Mailing list pgsql-committers

Log Message:
-----------
array_length() function, and for SQL compatibility also cardinality()
function as a special case.

This version still has the suspicious behavior of returning null for an
empty array (rather than zero), but this may need a wholesale revision of
empty array behavior, currently under discussion.

Jim Nasby, Robert Haas, Peter Eisentraut

Modified Files:
--------------
    pgsql/doc/src/sgml:
        array.sgml (r1.67 -> r1.68)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/array.sgml?r1=1.67&r2=1.68)
        func.sgml (r1.456 -> r1.457)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/func.sgml?r1=1.456&r2=1.457)
    pgsql/src/backend/utils/adt:
        arrayfuncs.c (r1.148 -> r1.149)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/arrayfuncs.c?r1=1.148&r2=1.149)
    pgsql/src/include/catalog:
        catversion.h (r1.503 -> r1.504)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h?r1=1.503&r2=1.504)
        pg_proc.h (r1.524 -> r1.525)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/pg_proc.h?r1=1.524&r2=1.525)
    pgsql/src/include/utils:
        array.h (r1.69 -> r1.70)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/utils/array.h?r1=1.69&r2=1.70)
    pgsql/src/test/regress/expected:
        arrays.out (r1.42 -> r1.43)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/arrays.out?r1=1.42&r2=1.43)
    pgsql/src/test/regress/sql:
        arrays.sql (r1.31 -> r1.32)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/arrays.sql?r1=1.31&r2=1.32)