pgsql: Support use of function argument names to identify which actual

Log Message:
-----------
Support use of function argument names to identify which actual arguments
match which function parameters.  The syntax uses AS, for example
    funcname(value AS arg1, anothervalue AS arg2)

Pavel Stehule

Modified Files:
--------------
    pgsql/doc/src/sgml/ref:
        create_function.sgml (r1.87 -> r1.88)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/ref/create_function.sgml?r1=1.87&r2=1.88)
    pgsql/doc/src/sgml:
        sources.sgml (r2.34 -> r2.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/sources.sgml?r1=2.34&r2=2.35)
        syntax.sgml (r1.136 -> r1.137)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/syntax.sgml?r1=1.136&r2=1.137)
        xfunc.sgml (r1.139 -> r1.140)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/xfunc.sgml?r1=1.139&r2=1.140)
    pgsql/src/backend/catalog:
        namespace.c (r1.118 -> r1.119)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/namespace.c?r1=1.118&r2=1.119)
        pg_aggregate.c (r1.102 -> r1.103)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/pg_aggregate.c?r1=1.102&r2=1.103)
        pg_proc.c (r1.167 -> r1.168)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/catalog/pg_proc.c?r1=1.167&r2=1.168)
    pgsql/src/backend/commands:
        aggregatecmds.c (r1.49 -> r1.50)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/aggregatecmds.c?r1=1.49&r2=1.50)
        functioncmds.c (r1.111 -> r1.112)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/functioncmds.c?r1=1.111&r2=1.112)
        tsearchcmds.c (r1.17 -> r1.18)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tsearchcmds.c?r1=1.17&r2=1.18)
        typecmds.c (r1.137 -> r1.138)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/typecmds.c?r1=1.137&r2=1.138)
    pgsql/src/backend/nodes:
        copyfuncs.c (r1.441 -> r1.442)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/copyfuncs.c?r1=1.441&r2=1.442)
        equalfuncs.c (r1.364 -> r1.365)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/equalfuncs.c?r1=1.364&r2=1.365)
        nodeFuncs.c (r1.42 -> r1.43)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/nodeFuncs.c?r1=1.42&r2=1.43)
        outfuncs.c (r1.365 -> r1.366)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/outfuncs.c?r1=1.365&r2=1.366)
        readfuncs.c (r1.223 -> r1.224)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/readfuncs.c?r1=1.223&r2=1.224)
    pgsql/src/backend/optimizer/plan:
        planner.c (r1.256 -> r1.257)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/planner.c?r1=1.256&r2=1.257)
    pgsql/src/backend/optimizer/util:
        clauses.c (r1.278 -> r1.279)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/clauses.c?r1=1.278&r2=1.279)
    pgsql/src/backend/parser:
        gram.y (r2.681 -> r2.682)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/gram.y?r1=2.681&r2=2.682)
        parse_expr.c (r1.243 -> r1.244)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_expr.c?r1=1.243&r2=1.244)
        parse_func.c (r1.216 -> r1.217)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/parser/parse_func.c?r1=1.216&r2=1.217)
    pgsql/src/backend/utils/adt:
        regproc.c (r1.110 -> r1.111)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/regproc.c?r1=1.110&r2=1.111)
        ruleutils.c (r1.306 -> r1.307)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/ruleutils.c?r1=1.306&r2=1.307)
    pgsql/src/backend/utils/fmgr:
        funcapi.c (r1.45 -> r1.46)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/fmgr/funcapi.c?r1=1.45&r2=1.46)
    pgsql/src/include/catalog:
        catversion.h (r1.542 -> r1.543)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/catversion.h?r1=1.542&r2=1.543)
        namespace.h (r1.59 -> r1.60)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/catalog/namespace.h?r1=1.59&r2=1.60)
    pgsql/src/include:
        funcapi.h (r1.29 -> r1.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/funcapi.h?r1=1.29&r2=1.30)
    pgsql/src/include/nodes:
        nodes.h (r1.227 -> r1.228)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/nodes.h?r1=1.227&r2=1.228)
        primnodes.h (r1.150 -> r1.151)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/nodes/primnodes.h?r1=1.150&r2=1.151)
    pgsql/src/include/parser:
        parse_func.h (r1.65 -> r1.66)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/parser/parse_func.h?r1=1.65&r2=1.66)
    pgsql/src/test/regress/expected:
        polymorphism.out (r1.20 -> r1.21)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/polymorphism.out?r1=1.20&r2=1.21)
        rangefuncs.out (r1.22 -> r1.23)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/expected/rangefuncs.out?r1=1.22&r2=1.23)
    pgsql/src/test/regress/sql:
        polymorphism.sql (r1.11 -> r1.12)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/polymorphism.sql?r1=1.11&r2=1.12)
        rangefuncs.sql (r1.11 -> r1.12)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/test/regress/sql/rangefuncs.sql?r1=1.11&r2=1.12)