-- Tests for less-than (<) operator on rdfnode type
\pset null NULL

-- Numeric comparisons
SELECT '"1"^^xsd:int'::rdfnode < '"2"^^xsd:int'::rdfnode; -- Returns t
SELECT '"1"^^xsd:int'::rdfnode < '"1"^^xsd:int'::rdfnode; -- Returns t
SELECT '"42.0"^^xsd:decimal'::rdfnode < '"42.1"^^xsd:decimal'::rdfnode; -- Returns t
SELECT '"42.0"^^xsd:double'::rdfnode < '"42.0"^^xsd:decimal'::rdfnode; -- Returns t
SELECT '"0.0"^^xsd:decimal'::rdfnode < '"-0.0"^^xsd:decimal'::rdfnode; -- Returns t
SELECT '"1e308"^^xsd:double'::rdfnode < '"INF"^^xsd:double'::rdfnode; -- Returns t
SELECT '"42"^^xsd:int'::rdfnode < '"43"^^xsd:short'::rdfnode; -- Returns t
SELECT '"42"^^xsd:byte'::rdfnode < '"42"^^xsd:int'::rdfnode; -- Returns t

-- Date
SELECT '"2020-01-01"^^xsd:date'::rdfnode < '"2021-01-01"^^xsd:date'::rdfnode; -- Returns t

-- Datetime
SELECT '"2025-04-25T18:45:00"^^xsd:dateTime'::rdfnode < '"2025-04-25T18:45:00"^^xsd:dateTime'::rdfnode; -- Returns t
SELECT '"2025-04-25T14:00:00+02:00"^^xsd:dateTime'::rdfnode < '"2025-04-25T12:00:00Z"^^xsd:dateTime'::rdfnode; -- Returns t
SELECT '"2025-04-25T12:00:00"^^xsd:dateTime'::rdfnode < '"2025-04-25T12:00:00Z"^^xsd:dateTime'::rdfnode; -- Error or defined behavior

-- Time
SELECT '"10:00:00"^^xsd:time'::rdfnode < '"11:00:00"^^xsd:time'::rdfnode;
SELECT '"11:00:00"^^xsd:time'::rdfnode < '"10:00:00"^^xsd:time'::rdfnode;
-- timezone-aware ordering
SELECT '"10:00:00+02:00"^^xsd:time'::rdfnode < '"09:00:00+02:00"^^xsd:time'::rdfnode;
SELECT '"09:00:00+02:00"^^xsd:time'::rdfnode < '"10:00:00+02:00"^^xsd:time'::rdfnode;
-- mixed tz/no-tz
SELECT '"10:00:00+02:00"^^xsd:time'::rdfnode < '"10:00:00"^^xsd:time'::rdfnode;
SELECT '"10:00:00"^^xsd:time'::rdfnode < '"10:00:00+02:00"^^xsd:time'::rdfnode;

-- String and simple literals
SELECT '"abc"^^xsd:string'::rdfnode < '"abd"^^xsd:string'::rdfnode; -- Returns t
SELECT '"abc"^^xsd:string'::rdfnode < '"abc"^^xsd:string'::rdfnode; -- Returns t
SELECT '"a"'::rdfnode < '"b"'::rdfnode; -- Returns t
SELECT '""^^xsd:string'::rdfnode < '"a"^^xsd:string'::rdfnode; -- Returns t
SELECT '"\u00E9"^^xsd:string'::rdfnode < '"\u00EA"^^xsd:string'::rdfnode; -- Returns t

-- Language-tagged literals
SELECT '"a"@en'::rdfnode < '"b"@en'::rdfnode; -- ERROR: cannot compare language-tagged literals
SELECT '"chat"@en'::rdfnode < '"chat"@fr'::rdfnode; -- ERROR: cannot compare language-tagged literals
SELECT '"abc"@de'::rdfnode < '"abc"@en'::rdfnode; -- ERROR: cannot compare language-tagged literals
SELECT '"abc"@en'::rdfnode < '"abc"@EN'::rdfnode; -- ERROR: cannot compare language-tagged literals

-- xsd:anyURI comparisons
SELECT '"http://a"^^xsd:anyURI'::rdfnode < '"http://b"^^xsd:anyURI'::rdfnode; -- Returns t
SELECT '"http://a"^^xsd:anyURI'::rdfnode < '"http://a"^^xsd:anyURI'::rdfnode; -- Returns t
SELECT '""^^xsd:anyURI'::rdfnode < '"http://b"^^xsd:anyURI'::rdfnode; -- Returns t
SELECT '"http://\u00E9"^^xsd:anyURI'::rdfnode < '"http://\u00EA"^^xsd:anyURI'::rdfnode; -- Returns t

-- Incompatible datatype comparisons
SELECT '"41"'::rdfnode < '"42"^^xsd:int'::rdfnode; -- ERROR: cannot compare literals of different datatypes
SELECT '"abc"^^xsd:string'::rdfnode < '"2020-01-01"^^xsd:date'::rdfnode; -- ERROR: cannot compare literals of different datatypes
SELECT '"2020-01-01"^^xsd:date'::rdfnode < '"abc"^^xsd:string'::rdfnode; -- ERROR: cannot compare literals of different datatypes
SELECT '"41"^^xsd:int'::rdfnode < '"42"^^ex:customDatatype'::rdfnode; -- ERROR: cannot compare literals of different datatypes

-- NaN and infinities
SELECT '"42"^^xsd:double'::rdfnode < '"NaN"^^xsd:double'::rdfnode; -- Returns f
SELECT '"NaN"^^xsd:double'::rdfnode < '"NaN"^^xsd:double'::rdfnode; -- Returns f
SELECT '"NaN"^^xsd:double'::rdfnode < '"42"^^xsd:double'::rdfnode; -- Returns f
SELECT '"999999999"^^xsd:double'::rdfnode < '"INF"^^xsd:double'::rdfnode; -- Returns t
SELECT '"-999999999"^^xsd:double'::rdfnode < '"-INF"^^xsd:double'::rdfnode; -- Returns f

-- Boolean comparisons
SELECT '"true"^^xsd:boolean'::rdfnode < '"false"^^xsd:boolean'::rdfnode;
SELECT '"false"^^xsd:boolean'::rdfnode < '"true"^^xsd:boolean'::rdfnode;
SELECT '"true"^^xsd:boolean'::rdfnode < '"true"^^xsd:boolean'::rdfnode;
SELECT '"false"^^xsd:boolean'::rdfnode < '"false"^^xsd:boolean'::rdfnode;

-- Durations
SELECT '"P1Y"^^xsd:duration'::rdfnode < '"-P1Y"^^xsd:duration'::rdfnode;
SELECT '"-P1Y"^^xsd:duration'::rdfnode < '"P1Y"^^xsd:duration'::rdfnode;
SELECT '"-P1Y"^^xsd:duration'::rdfnode < '"-P1Y"^^xsd:duration'::rdfnode;
SELECT '"-P1Y"^^xsd:duration'::rdfnode < '"-P2Y"^^xsd:duration'::rdfnode;
SELECT '"P7D"^^xsd:duration'::rdfnode < '"P1W"^^xsd:duration'::rdfnode;
SELECT '"P1M"^^xsd:duration'::rdfnode < '"P1M"^^xsd:duration'::rdfnode;
SELECT '"PT0S"^^xsd:duration'::rdfnode < '"P0D"^^xsd:duration'::rdfnode;
SELECT '"PT1H"^^xsd:duration'::rdfnode < '"P1D"^^xsd:duration'::rdfnode;