2/29/2024 0 Comments Generate xml from sql queryKeyword SCHEMACHECK can be used to obtain backward compatibility.Ī similar check is always made at compile time, regardless of the presence or absence of NOSCHEMACHECK. In releases prior to 12c Release 1 (12.1), the default behavior is to perform the check. The default behavior is that provided by NOSCHEMACHECK: no check is made. Keywords SCHEMACHECK and NOSCHEMACHECK determine whether or not a run-time check is made of the generated attributes, to see if any of them specify a schema location that corresponds to an XML schema that is registered with Oracle XML DB, and, if so, to try to generate XML schema-based XML data accordingly. If a value argument evaluates to NULL, then no content is created for that argument.įigure 8-2 XMLAttributes Clause Syntax (XMLATTRIBUTES)ĭescription of "Figure 8-2 XMLAttributes Clause Syntax (XMLATTRIBUTES)" Each of the content-argument expressions is evaluated, and the result is converted to XML format. If an XML-attributes-clause argument is also present then these content arguments must follow the XML-attributes-clause argument. In addition to the optional XML-attributes-clause argument, function XMLElement accepts zero or more value_expr arguments that make up the content of the root element (child elements and text content). Figure 8-2 shows the syntax of this argument. The optional XML-attributes-clause argument of function XMLElement specifies the attributes of the root element to be generated. The possibility of using EVALNAME is an Oracle extension to standard SQL/XML function XMLElement. However it is defined, the identifier must not be NULL or else an error is raised. The root-element identifier argument can be defined using a literal identifier ( identifier, in Figure 8-1) or by EVALNAME followed by an expression ( value_expr) that evaluates to an identifier. The first argument to function XMLElement defines an identifier that names the root XML element to be created. These keywords are Oracle extensions to standard SQL/XML functions XMLElement and XMLAttributes. You use Oracle SQL function XMLCDATA to generate an XML CDATA section.ĭescription of "Figure 8-1 XMLELEMENT Syntax"įor an explanation of keywords ENTITYESCAPING and NOENTITYESCAPING, see Escape of Characters in Generated XML Data. This function is an Oracle extension to the SQL/XML ANSI-ISO standard functions. Oracle SQL function XMLColAttVal generates a forest of XML column elements containing the values of the arguments passed in. You use SQL/XML standard function XMLParse to parse a string containing XML data and construct a corresponding XMLType instance. You use SQL/XML standard function XMLSerialize to obtain a string or LOB representation of XML data. You use SQL/XML standard function XMLComment to construct an XML comment. You use SQL/XML standard function XMLPI to construct an XML processing instruction (PI). You use SQL/XML standard function XMLAgg to construct a forest of XML elements from a collection of XML elements - it is an aggregate function. You use SQL/XML standard function XMLConcat to construct an XML fragment by concatenating multiple XMLType instances. You use SQL/XML standard function XMLForest to construct a forest of XML elements. SQL/XML standard function XMLAttributes can be used together with XMLElement, to specify attributes for the generated elements. SQL/XML standard function XMLElement constructs XML elements from relational data.
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