SEM_APIS.GETV$STRINGVAL

Format

SEM_APIS.GETV$STRINGVAL(
     value_type     IN VARCHAR2,
     vname_prefix   IN VARCHAR2,
     vname_suffix   IN VARCHAR2,
     literal_type   IN VARCHAR2,
     language_type  IN VARCHAR2,
     ) RETURN TIMESTAMP WITH TIME ZONE;

Description

Returns a VARCHAR2 string of the lexical form of plain literals and xsd:string typed literals, and returns a null value for all other RDF terms. CHR(0) is returned for empty literals.

Parameters

value_type

Type of the RDF term.

vname_prefix

Prefix value of the RDF term.

vname_suffix

Suffix value of the RDF term.

literal_type

Literal type of the RDF term.

language_type

Language type of the RDF term.

Usage Notes

For better performance, consider creating a function-based index on this function. For more information, see Function-Based Indexes for FILTER Constructs Involving Typed Literals.

Examples

The following example returns lexical values for all plain literals and xsd:string literals in the RDF_VALUE$ table:

SELECT SEM_APIS.GETV$STRINGVAL(value_type, vname_prefix, vname_suffix,
  literal_type, language_type)
  FROM RDF_VALUE$;