## D.2. Unsupported Features

 The following features defined in SQL:2016 are not implemented in this release of PostgreSQL. In a few cases, equivalent functionality is available.

|Identifier|Core?|                                              Description                                               |                            Comment                             |
|----------|-----|--------------------------------------------------------------------------------------------------------|----------------------------------------------------------------|
|   B011   |     |                                              Embedded Ada                                              |                                                                |
|   B013   |     |                                             Embedded COBOL                                             |                                                                |
|   B014   |     |                                            Embedded Fortran                                            |                                                                |
|   B015   |     |                                             Embedded MUMPS                                             |                                                                |
|   B016   |     |                                            Embedded Pascal                                             |                                                                |
|   B017   |     |                                             Embedded PL/I                                              |                                                                |
|   B031   |     |                                           Basic dynamic SQL                                            |                                                                |
|   B032   |     |                                          Extended dynamic SQL                                          |                                                                |
| B032-01  |     |                                      \<describe input statement\>                                      |                                                                |
|   B033   |     |                                 Untyped SQL-invoked function arguments                                 |                                                                |
|   B034   |     |                               Dynamic specification of cursor attributes                               |                                                                |
|   B035   |     |                                     Non-extended descriptor names                                      |                                                                |
|   B041   |     |                           Extensions to embedded SQL exception declarations                            |                                                                |
|   B051   |     |                                       Enhanced execution rights                                        |                                                                |
|   B111   |     |                                          Module language Ada                                           |                                                                |
|   B112   |     |                                           Module language C                                            |                                                                |
|   B113   |     |                                         Module language COBOL                                          |                                                                |
|   B114   |     |                                        Module language Fortran                                         |                                                                |
|   B115   |     |                                         Module language MUMPS                                          |                                                                |
|   B116   |     |                                         Module language Pascal                                         |                                                                |
|   B117   |     |                                          Module language PL/I                                          |                                                                |
|   B121   |     |                                          Routine language Ada                                          |                                                                |
|   B122   |     |                                           Routine language C                                           |                                                                |
|   B123   |     |                                         Routine language COBOL                                         |                                                                |
|   B124   |     |                                        Routine language Fortran                                        |                                                                |
|   B125   |     |                                         Routine language MUMPS                                         |                                                                |
|   B126   |     |                                        Routine language Pascal                                         |                                                                |
|   B127   |     |                                         Routine language PL/I                                          |                                                                |
|   B128   |     |                                          Routine language SQL                                          |                                                                |
|   B200   |     |                                      Polymorphic table functions                                       |                                                                |
|   B201   |     |                               More than one PTF generic table parameter                                |                                                                |
|   B202   |     |                                           PTF Copartitioning                                           |                                                                |
|   B203   |     |                                More than one copartition specification                                 |                                                                |
|   B204   |     |                                            PRUNE WHEN EMPTY                                            |                                                                |
|   B205   |     |                                          Pass-through columns                                          |                                                                |
|   B206   |     |                                       PTF descriptor parameters                                        |                                                                |
|   B207   |     |                                    Cross products of partitionings                                     |                                                                |
|   B208   |     |                                   PTF component procedure interface                                    |                                                                |
|   B209   |     |                                           PTF extended names                                           |                                                                |
|   B211   |     |                            Module language Ada: VARCHAR and NUMERIC support                            |                                                                |
|   B221   |     |                           Routine language Ada: VARCHAR and NUMERIC support                            |                                                                |
|   F054   |     |                                 TIMESTAMP in DATE type precedence list                                 |                                                                |
|   F121   |     |                                      Basic diagnostics management                                      |                                                                |
| F121-01  |     |                                       GET DIAGNOSTICS statement                                        |                                                                |
| F121-02  |     |                           SET TRANSACTION statement: DIAGNOSTICS SIZE clause                           |                                                                |
|   F122   |     |                                    Enhanced diagnostics management                                     |                                                                |
|   F123   |     |                                            All diagnostics                                             |                                                                |
|   F263   |     |                          Comma-separated predicates in simple CASE expression                          |                                                                |
|   F291   |     |                                            UNIQUE predicate                                            |                                                                |
|   F301   |     |                                   CORRESPONDING in query expressions                                   |                                                                |
|   F312   |     |                                            MERGE statement                                             |           consider INSERT ... ON CONFLICT DO UPDATE            |
|   F313   |     |                                        Enhanced MERGE statement                                        |                                                                |
|   F314   |     |                                   MERGE statement with DELETE branch                                   |                                                                |
|   F403   |     |                                       Partitioned joined tables                                        |                                                                |
|   F451   |     |                                        Character set definition                                        |                                                                |
|   F461   |     |                                          Named character sets                                          |                                                                |
|   F492   |     |                                 Optional table constraint enforcement                                  |                                                                |
|   F521   |     |                                               Assertions                                               |                                                                |
|   F671   |     |                                          Subqueries in CHECK                                           |                     intentionally omitted                      |
|   F673   |     |                        Reads SQL-data routine invocations in CHECK constraints                         |                                                                |
|   F693   |     |                                SQL-session and client module collations                                |                                                                |
|   F695   |     |                                          Translation support                                           |                                                                |
|   F696   |     |                                  Additional translation documentation                                  |                                                                |
|   F721   |     |                                         Deferrable constraints                                         |                  foreign and unique keys only                  |
|   F741   |     |                                        Referential MATCH types                                         |                      no partial match yet                      |
|   F812   |Core |                                             Basic flagging                                             |                                                                |
|   F813   |     |                                           Extended flagging                                            |                                                                |
|   F821   |     |                                         Local table references                                         |                                                                |
|   F831   |     |                                           Full cursor update                                           |                                                                |
| F831-01  |     |                                      Updatable scrollable cursors                                      |                                                                |
| F831-02  |     |                                       Updatable ordered cursors                                        |                                                                |
|   F841   |     |                                         LIKE\_REGEX predicate                                          |                                                                |
|   F842   |     |                                      OCCURRENCES\_REGEX function                                       |                                                                |
|   F843   |     |                                        POSITION\_REGEX function                                        |                                                                |
|   F844   |     |                                       SUBSTRING\_REGEX function                                        |                                                                |
|   F845   |     |                                       TRANSLATE\_REGEX function                                        |                                                                |
|   F846   |     |                             Octet support in regular expression operators                              |                                                                |
|   F847   |     |                                    Nonconstant regular expressions                                     |                                                                |
|   F866   |     |                                   FETCH FIRST clause: PERCENT option                                   |                                                                |
|   R010   |     |                                  Row pattern recognition: FROM clause                                  |                                                                |
|   R020   |     |                                 Row pattern recognition: WINDOW clause                                 |                                                                |
|   R030   |     |                            Row pattern recognition: full aggregate support                             |                                                                |
|   S011   |Core |                                          Distinct data types                                           |                                                                |
| S011-01  |Core |                                       USER\_DEFINED\_TYPES view                                        |                                                                |
|   S023   |     |                                         Basic structured types                                         |                                                                |
|   S024   |     |                                       Enhanced structured types                                        |                                                                |
|   S025   |     |                                         Final structured types                                         |                                                                |
|   S026   |     |                                   Self-referencing structured types                                    |                                                                |
|   S027   |     |                                 Create method by specific method name                                  |                                                                |
|   S028   |     |                                      Permutable UDT options list                                       |                                                                |
|   S041   |     |                                         Basic reference types                                          |                                                                |
|   S043   |     |                                        Enhanced reference types                                        |                                                                |
|   S051   |     |                                          Create table of type                                          |                      partially supported                       |
|   S081   |     |                                               Subtables                                                |                                                                |
|   S091   |     |                                          Basic array support                                           |                      partially supported                       |
| S091-01  |     |                                     Arrays of built-in data types                                      |                                                                |
| S091-02  |     |                                        Arrays of distinct types                                        |                                                                |
| S091-03  |     |                                           Array expressions                                            |                                                                |
|   S094   |     |                                       Arrays of reference types                                        |                                                                |
|   S097   |     |                                        Array element assignment                                        |                                                                |
|   S151   |     |                                             Type predicate                                             |                        see pg\_typeof()                        |
|   S161   |     |                                           Subtype treatment                                            |                                                                |
|   S162   |     |                                    Subtype treatment for references                                    |                                                                |
|   S202   |     |                                   SQL-invoked routines on multisets                                    |                                                                |
|   S231   |     |                                        Structured type locators                                        |                                                                |
|   S232   |     |                                             Array locators                                             |                                                                |
|   S233   |     |                                           Multiset locators                                            |                                                                |
|   S241   |     |                                          Transform functions                                           |                                                                |
|   S242   |     |                                       Alter transform statement                                        |                                                                |
|   S251   |     |                                         User-defined orderings                                         |                                                                |
|   S261   |     |                                          Specific type method                                          |                                                                |
|   S271   |     |                                         Basic multiset support                                         |                                                                |
|   S272   |     |                                    Multisets of user-defined types                                     |                                                                |
|   S274   |     |                                      Multisets of reference types                                      |                                                                |
|   S275   |     |                                       Advanced multiset support                                        |                                                                |
|   S281   |     |                                        Nested collection types                                         |                                                                |
|   S291   |     |                                    Unique constraint on entire row                                     |                                                                |
|   S401   |     |                                  Distinct types based on array types                                   |                                                                |
|   S402   |     |                                 Distinct types based on distinct types                                 |                                                                |
|   S403   |     |                                        ARRAY\_MAX\_CARDINALITY                                         |                                                                |
|   T011   |     |                                    Timestamp in Information Schema                                     |                                                                |
|   T021   |     |                                    BINARY and VARBINARY data types                                     |                                                                |
|   T022   |     |                          Advanced support for BINARY and VARBINARY data types                          |                                                                |
|   T023   |     |                                        Compound binary literal                                         |                                                                |
|   T024   |     |                                       Spaces in binary literals                                        |                                                                |
|   T041   |     |                                      Basic LOB data type support                                       |                                                                |
| T041-01  |     |                                             BLOB data type                                             |                                                                |
| T041-02  |     |                                             CLOB data type                                             |                                                                |
| T041-03  |     |            POSITION, LENGTH, LOWER, TRIM, UPPER, and SUBSTRING functions for LOB data types            |                                                                |
| T041-04  |     |                                    Concatenation of LOB data types                                     |                                                                |
| T041-05  |     |                                       LOB locator: non-holdable                                        |                                                                |
|   T042   |     |                                     Extended LOB data type support                                     |                                                                |
|   T043   |     |                                              Multiplier T                                              |                                                                |
|   T044   |     |                                              Multiplier P                                              |                                                                |
|   T051   |     |                                               Row types                                                |                                                                |
|   T053   |     |                               Explicit aliases for all-fields reference                                |                                                                |
|   T061   |     |                                              UCS support                                               |                                                                |
|   T076   |     |                                           DECFLOAT data type                                           |                                                                |
|   T101   |     |                                   Enhanced nullability determination                                   |                                                                |
|   T111   |     |                                  Updatable joins, unions, and columns                                  |                                                                |
|   T175   |     |                                           Generated columns                                            |                        mostly supported                        |
|   T176   |     |                                       Sequence generator support                                       |              supported except for NEXT VALUE FOR               |
|   T180   |     |                                        System-versioned tables                                         |                                                                |
|   T181   |     |                                     Application-time period tables                                     |                                                                |
|   T211   |     |                                        Basic trigger capability                                        |                                                                |
| T211-06  |     |               Support for run-time rules for the interaction of triggers and constraints               |                                                                |
| T211-08  |     |Multiple triggers for the same event are executed in the order in which they were created in the catalog|                     intentionally omitted                      |
|   T231   |     |                                           Sensitive cursors                                            |                                                                |
|   T251   |     |                                SET TRANSACTION statement: LOCAL option                                 |                                                                |
|   T272   |     |                                     Enhanced savepoint management                                      |                                                                |
|   T301   |     |                                        Functional dependencies                                         |                      partially supported                       |
|   T321   |Core |                                       Basic SQL-invoked routines                                       |                                                                |
| T321-05  |Core |                                            RETURN statement                                            |                                                                |
|   T322   |     |                                     Declared data type attributes                                      |                                                                |
|   T324   |     |                                   Explicit security for SQL routines                                   |                                                                |
|   T326   |     |                                            Table functions                                             |                                                                |
|   T471   |     |                                        Result sets return value                                        |                                                                |
|   T472   |     |                                            DESCRIBE CURSOR                                             |                                                                |
|   T495   |     |                                   Combined data change and retrieval                                   |                        different syntax                        |
|   T502   |     |                                           Period predicates                                            |                                                                |
|   T511   |     |                                           Transaction counts                                           |                                                                |
|   T522   |     |                       Default values for IN parameters of SQL-invoked procedures                       |        supported except DEFAULT key word in invocation         |
|   T561   |     |                                           Holdable locators                                            |                                                                |
|   T571   |     |                             Array-returning external SQL-invoked functions                             |                                                                |
|   T572   |     |                           Multiset-returning external SQL-invoked functions                            |                                                                |
|   T601   |     |                                        Local cursor references                                         |                                                                |
|   T616   |     |                            Null treatment option for LEAD and LAG functions                            |                                                                |
|   T618   |     |                                          NTH\_VALUE function                                           |           function exists, but some options missing            |
|   T619   |     |                                        Nested window functions                                         |                                                                |
|   T625   |     |                                                LISTAGG                                                 |                                                                |
|   T641   |     |                                       Multiple column assignment                                       |              only some syntax variants supported               |
|   T652   |     |                                 SQL-dynamic statements in SQL routines                                 |                                                                |
|   T654   |     |                              SQL-dynamic statements in external routines                               |                                                                |
|   T811   |     |                                  Basic SQL/JSON constructor functions                                  |                                                                |
|   T812   |     |                                       SQL/JSON: JSON\_OBJECTAGG                                        |                                                                |
|   T813   |     |                                 SQL/JSON: JSON\_ARRAYAGG with ORDER BY                                 |                                                                |
|   T814   |     |                                Colon in JSON\_OBJECT or JSON\_OBJECTAGG                                |                                                                |
|   T821   |     |                                     Basic SQL/JSON query operators                                     |                                                                |
|   T822   |     |                              SQL/JSON: IS JSON WITH UNIQUE KEYS predicate                              |                                                                |
|   T823   |     |                                        SQL/JSON: PASSING clause                                        |                                                                |
|   T824   |     |                                   JSON\_TABLE: specific PLAN clause                                    |                                                                |
|   T825   |     |                                SQL/JSON: ON EMPTY and ON ERROR clauses                                 |                                                                |
|   T826   |     |                        General value expression in ON ERROR or ON EMPTY clauses                        |                                                                |
|   T827   |     |                              JSON\_TABLE: sibling NESTED COLUMNS clauses                               |                                                                |
|   T828   |     |                                              JSON\_QUERY                                               |                                                                |
|   T829   |     |                                   JSON\_QUERY: array wrapper options                                   |                                                                |
|   T830   |     |                        Enforcing unique keys in SQL/JSON constructor functions                         |                                                                |
|   T838   |     |                                    JSON\_TABLE: PLAN DEFAULT clause                                    |                                                                |
|   T839   |     |                         Formatted cast of datetimes to/from character strings                          |                                                                |
|   M001   |     |                                               Datalinks                                                |                                                                |
|   M002   |     |                                         Datalinks via SQL/CLI                                          |                                                                |
|   M003   |     |                                       Datalinks via Embedded SQL                                       |                                                                |
|   M004   |     |                                          Foreign data support                                          |                      partially supported                       |
|   M005   |     |                                         Foreign schema support                                         |                                                                |
|   M006   |     |                                          GetSQLString routine                                          |                                                                |
|   M007   |     |                                            TransmitRequest                                             |                                                                |
|   M009   |     |                                   GetOpts and GetStatistics routines                                   |                                                                |
|   M010   |     |                                      Foreign data wrapper support                                      |                         different API                          |
|   M011   |     |                                           Datalinks via Ada                                            |                                                                |
|   M012   |     |                                            Datalinks via C                                             |                                                                |
|   M013   |     |                                          Datalinks via COBOL                                           |                                                                |
|   M014   |     |                                         Datalinks via Fortran                                          |                                                                |
|   M015   |     |                                            Datalinks via M                                             |                                                                |
|   M016   |     |                                          Datalinks via Pascal                                          |                                                                |
|   M017   |     |                                           Datalinks via PL/I                                           |                                                                |
|   M018   |     |                             Foreign data wrapper interface routines in Ada                             |                                                                |
|   M019   |     |                              Foreign data wrapper interface routines in C                              |                         different API                          |
|   M020   |     |                            Foreign data wrapper interface routines in COBOL                            |                                                                |
|   M021   |     |                           Foreign data wrapper interface routines in Fortran                           |                                                                |
|   M022   |     |                            Foreign data wrapper interface routines in MUMPS                            |                                                                |
|   M023   |     |                           Foreign data wrapper interface routines in Pascal                            |                                                                |
|   M024   |     |                            Foreign data wrapper interface routines in PL/I                             |                                                                |
|   M030   |     |                                    SQL-server foreign data support                                     |                                                                |
|   M031   |     |                                 Foreign data wrapper general routines                                  |                                                                |
|   X012   |     |                                         Multisets of XML type                                          |                                                                |
|   X013   |     |                                       Distinct types of XML type                                       |                                                                |
|   X015   |     |                                           Fields of XML type                                           |                                                                |
|   X025   |     |                                                XMLCast                                                 |                                                                |
|   X030   |     |                                              XMLDocument                                               |                                                                |
|   X038   |     |                                                XMLText                                                 |                                                                |
|   X065   |     |                                XMLParse: BLOB input and CONTENT option                                 |                                                                |
|   X066   |     |                                XMLParse: BLOB input and DOCUMENT option                                |                                                                |
|   X068   |     |                                           XMLSerialize: BOM                                            |                                                                |
|   X069   |     |                                          XMLSerialize: INDENT                                          |                                                                |
|   X073   |     |                          XMLSerialize: BLOB serialization and CONTENT option                           |                                                                |
|   X074   |     |                          XMLSerialize: BLOB serialization and DOCUMENT option                          |                                                                |
|   X075   |     |                                    XMLSerialize: BLOB serialization                                    |                                                                |
|   X076   |     |                                         XMLSerialize: VERSION                                          |                                                                |
|   X077   |     |                                 XMLSerialize: explicit ENCODING option                                 |                                                                |
|   X078   |     |                                 XMLSerialize: explicit XML declaration                                 |                                                                |
|   X080   |     |                                      Namespaces in XML publishing                                      |                                                                |
|   X081   |     |                                 Query-level XML namespace declarations                                 |                                                                |
|   X082   |     |                                   XML namespace declarations in DML                                    |                                                                |
|   X083   |     |                                   XML namespace declarations in DDL                                    |                                                                |
|   X084   |     |                           XML namespace declarations in compound statements                            |                                                                |
|   X085   |     |                                     Predefined namespace prefixes                                      |                                                                |
|   X086   |     |                                 XML namespace declarations in XMLTable                                 |                                                                |
|   X091   |     |                                         XML content predicate                                          |                                                                |
|   X096   |     |                                               XMLExists                                                |                         XPath 1.0 only                         |
|   X100   |     |                             Host language support for XML: CONTENT option                              |                                                                |
|   X101   |     |                             Host language support for XML: DOCUMENT option                             |                                                                |
|   X110   |     |                             Host language support for XML: VARCHAR mapping                             |                                                                |
|   X111   |     |                              Host language support for XML: CLOB mapping                               |                                                                |
|   X112   |     |                              Host language support for XML: BLOB mapping                               |                                                                |
|   X113   |     |                         Host language support for XML: STRIP WHITESPACE option                         |                                                                |
|   X114   |     |                       Host language support for XML: PRESERVE WHITESPACE option                        |                                                                |
|   X131   |     |                                      Query-level XMLBINARY clause                                      |                                                                |
|   X132   |     |                                        XMLBINARY clause in DML                                         |                                                                |
|   X133   |     |                                        XMLBINARY clause in DDL                                         |                                                                |
|   X134   |     |                                XMLBINARY clause in compound statements                                 |                                                                |
|   X135   |     |                                     XMLBINARY clause in subqueries                                     |                                                                |
|   X141   |     |                                  IS VALID predicate: data-driven case                                  |                                                                |
|   X142   |     |                                IS VALID predicate: ACCORDING TO clause                                 |                                                                |
|   X143   |     |                                   IS VALID predicate: ELEMENT clause                                   |                                                                |
|   X144   |     |                                  IS VALID predicate: schema location                                   |                                                                |
|   X145   |     |                              IS VALID predicate outside check constraints                              |                                                                |
|   X151   |     |                                IS VALID predicate with DOCUMENT option                                 |                                                                |
|   X152   |     |                                 IS VALID predicate with CONTENT option                                 |                                                                |
|   X153   |     |                                IS VALID predicate with SEQUENCE option                                 |                                                                |
|   X155   |     |                          IS VALID predicate: NAMESPACE without ELEMENT clause                          |                                                                |
|   X157   |     |                          IS VALID predicate: NO NAMESPACE with ELEMENT clause                          |                                                                |
|   X160   |     |                          Basic Information Schema for registered XML Schemas                           |                                                                |
|   X161   |     |                         Advanced Information Schema for registered XML Schemas                         |                                                                |
|   X170   |     |                                       XML null handling options                                        |                                                                |
|   X171   |     |                                        NIL ON NO CONTENT option                                        |                                                                |
|   X181   |     |                                      XML(DOCUMENT(UNTYPED)) type                                       |                                                                |
|   X182   |     |                                        XML(DOCUMENT(ANY)) type                                         |                                                                |
|   X190   |     |                                           XML(SEQUENCE) type                                           |                                                                |
|   X191   |     |                                     XML(DOCUMENT(XMLSCHEMA)) type                                      |                                                                |
|   X192   |     |                                      XML(CONTENT(XMLSCHEMA)) type                                      |                                                                |
|   X200   |     |                                                XMLQuery                                                |                                                                |
|   X201   |     |                                      XMLQuery: RETURNING CONTENT                                       |                                                                |
|   X202   |     |                                      XMLQuery: RETURNING SEQUENCE                                      |                                                                |
|   X203   |     |                                    XMLQuery: passing a context item                                    |                                                                |
|   X204   |     |                               XMLQuery: initializing an XQuery variable                                |                                                                |
|   X205   |     |                                    XMLQuery: EMPTY ON EMPTY option                                     |                                                                |
|   X206   |     |                                     XMLQuery: NULL ON EMPTY option                                     |                                                                |
|   X211   |     |                                            XML 1.1 support                                             |                                                                |
|   X222   |     |                                      XML passing mechanism BY REF                                      |parser accepts BY REF but ignores it; passing is always BY VALUE|
|   X231   |     |                                       XML(CONTENT(UNTYPED)) type                                       |                                                                |
|   X232   |     |                                         XML(CONTENT(ANY)) type                                         |                                                                |
|   X241   |     |                                  RETURNING CONTENT in XML publishing                                   |                                                                |
|   X242   |     |                                  RETURNING SEQUENCE in XML publishing                                  |                                                                |
|   X251   |     |                          Persistent XML values of XML(DOCUMENT(UNTYPED)) type                          |                                                                |
|   X252   |     |                            Persistent XML values of XML(DOCUMENT(ANY)) type                            |                                                                |
|   X253   |     |                          Persistent XML values of XML(CONTENT(UNTYPED)) type                           |                                                                |
|   X254   |     |                            Persistent XML values of XML(CONTENT(ANY)) type                             |                                                                |
|   X255   |     |                              Persistent XML values of XML(SEQUENCE) type                               |                                                                |
|   X256   |     |                         Persistent XML values of XML(DOCUMENT(XMLSCHEMA)) type                         |                                                                |
|   X257   |     |                         Persistent XML values of XML(CONTENT(XMLSCHEMA)) type                          |                                                                |
|   X260   |     |                                        XML type: ELEMENT clause                                        |                                                                |
|   X261   |     |                               XML type: NAMESPACE without ELEMENT clause                               |                                                                |
|   X263   |     |                               XML type: NO NAMESPACE with ELEMENT clause                               |                                                                |
|   X264   |     |                                       XML type: schema location                                        |                                                                |
|   X271   |     |                                     XMLValidate: data-driven case                                      |                                                                |
|   X272   |     |                                    XMLValidate: ACCORDING TO clause                                    |                                                                |
|   X273   |     |                                      XMLValidate: ELEMENT clause                                       |                                                                |
|   X274   |     |                                      XMLValidate: schema location                                      |                                                                |
|   X281   |     |                                    XMLValidate with DOCUMENT option                                    |                                                                |
|   X282   |     |                                    XMLValidate with CONTENT option                                     |                                                                |
|   X283   |     |                                    XMLValidate with SEQUENCE option                                    |                                                                |
|   X284   |     |                             XMLValidate: NAMESPACE without ELEMENT clause                              |                                                                |
|   X286   |     |                             XMLValidate: NO NAMESPACE with ELEMENT clause                              |                                                                |
|   X300   |     |                                                XMLTable                                                |                         XPath 1.0 only                         |
|   X305   |     |                               XMLTable: initializing an XQuery variable                                |                                                                |

