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existsNode → public boolean existsNode(java.lang.String xpath, java.lang.String nsmap) throws
EXISTSNODE → Syntax existsnode::= Text description of existsnode Purpose EXISTSNODE determines whether traversal … WHERE EXISTSNODE(warehouse_spec, '/Warehouse/Docks') = 1; WAREHOUSE_ID WAREHOUSE_NAME
existsNode Function → The syntax for the existsNode() function is described in Figure 4-2 and also as follows: existsNode … NUMBER Figure 4-2 existsNode() Syntax Text description of the illustration existsnode.gif … existsNode() function on XMLType checks if the given XPath evaluation results in at least a single XML … namespace(s).
Using existsNode() → The existsNode() syntax is shown in Figure 3-1. Figure 3-1 existsNode() Syntax Text description of … the illustration existsnode.gif Example 3-4 existsNode() Examples That Find a Node to Match the … XPath Expression Given this sample XML document, the following existsNode() operators return true (1 … ). SELECT
XPath Expression Rewrites for existsNode() → existsNode() returns a numerical value 0 or 1 indicating if the XPath returns any nodes ( text() or … element nodes). Based on the mapping discussed in the earlier section, an existsNode() simply … the scalar column. existsNode Mapping with Document Order Maintained Table 5-12 shows the mapping of … various XPaths in the case
Querying XML Data: Use CONTAINS or existsNode()? → important semantic differences between the CONTAINS operator and the existsNode() function. The … existsNode, extract() and extractValue() SQL functions (and the corresponding member functions of XMLType … Text CONTAINS() and existsNode() searching. Table 7-6 lists and compares CONTAINS() and existsNode … () features
Oracle XML DB: Using CTXXPATH Indexes for existsNode() → The existsNode() SQL function, unlike the CONTAINS operator, cannot use ConText indexes to speed up … its evaluation. To improve the performance of XPath searches in existsNode(), this release … designed to serve as a primary filter for existsNode() processing, that is, it produces a superset
CREATE_POLICY → an XPATH query expression with existsNode. See Also: Oracle9i XML Developer's Guide - Oracle XML DB
Syntax for CTXXPATH Indextype → Create this index when you need to speed up ExistsNode() queries on an XMLType column. CREATE INDEX
CTXXPATH Examples → ('storage my_storage memory 40M'); Querying the table with ExistsNode: select xml_id from xml_tab x
Example → => 'mystop', wordlist => 'mywordlist'); Then you can issue the following ExistsNode() query with your … own defined policy: select id from xmltab where existsNode(doc, '/book/chapter[ ora:contains
XMLType Payloads → queue Query XMLType columns using the operators ExistsNode() and SchemaMatch() Specify the operators in subscriber rules or dequeue conditions
Oracle Text → Stem Indexing Chinese Lexer URIType indexing CTXXPATH ORA:CONTAINS Support in ExistsNode() Document … indexes on URIType columns. CTXXPATH The CTXXPATH indextype enables you to speed up ExistsNode … () queries on XMLType columns. ORA:CONTAINS Support in ExistsNode() You can call the CONTAINS function … within an ExistsNode()
Methods → the XMLType. extract Function to extract the given set of nodes from the XMLType. existsNode Function
EXTRACT (XML) → EXISTSNODE function. It applies a VARCHAR2 XPath string and returns an XMLType instance containing an XML
getXML() → returns it as a sys.XMLType. XMLType operations can be performed on the results, including ExistsNode … results, including ExistsNode and Extract. This also provides a way of obtaining the results as a
getXML() → sys.XMLType. XMLType operations can be performed on the results, including ExistsNode and Extract … , including ExistsNode and Extract. This also provides a way of obtaining the results as a string by using the
XML Database Features Introduced in Oracle9 i Release 2 (9.2) → Updates extract(), existsNode(), and extractValue() support namespace-based operation. extract … (), existsNode(), and extractValue() support the full XPath function set, including axis operators … query and as part of the existsNode() function. CTXXPATH is a new index type for use with … existsNode() to speedup