"Edge table"

Is there an easy to implement way to get a schema-independent representation of the content stored in an XMLTYPE column? Rather than building XMLTABLEs & manually specifying PATH a thousand times, I'd like an easy way to free the content from the hierarchy of xml and get it into a key,value-ish representation as quickly and painlessly as possible.
Kinda like this?
http://www.informit.com/articles/article.aspx?p=169590&seqNum=5
Schema-Independent Representation
One possibility for handling the vagaries of full XML is to use a relational representation
that is totally independent of the schema of the XML data. An example of such a representation
is an edge table, in which a single table contains information about the relationship between
parent and child elements (using node identifiers), and another column contains simple
element content. Listing 6.14 provides an example of an XML fragment and an edge-table
representation of it.
Listing 6.14 An Edge Table for an XML Fragment
<Department id="A12x" name="Physics">
  <Employee id="555-23-4567">
    <name>Mary Phillips</name>
    <office>21</office>
  </Employee>
  <Employee id="544-12-3456">
edge table
parentid  childid  name         value
null      1        Department   null
1         2        @id          A12x
1         3        @name        Physics
1         4        Employee     null
4         5        @id          555-23-4567
4         6        name         Mary Phillips
4         7        office       21
1         8        Employee     null
8         9        @id          544-12-3456

Actually, I think I can use CONNECT BY to build that list once the XML's dumped into a table to build those xpaths.That's one way, indeed.
If you want the positional predicates too, you'll need an additional step, for example :
SQL> SELECT node_id
  2       , parent_node_id
  3       , node_name
  4       , node_value
  5       , sys_connect_by_path(xpath_step, '/') as xpath
  6  FROM (
  7    SELECT x.node_id
  8         , x.parent_node_id
  9         , x.node_name
10         , x.node_value
11         , case x.node_kind
12             when 'attribute' then '@' || x.node_name
13             when 'element' then x.node_name || '[' ||
14                                 to_char( row_number() over( partition by x.parent_node_id
15                                                                        , x.node_name
16                                                             order by x.node_position ) ) || ']'
17           end as xpath_step
18         , x.node_position
19    FROM xml_test t
20       , XMLTable('/ROWSET/ROW'
21          passing xmltransform(t.doc, t.xsl)
22          columns node_id         varchar2(100)   path '@id'
23                , node_name       varchar2(30)    path '@name'
24                , node_value      varchar2(2000)  path 'text()'
25                , parent_node_id  varchar2(100)   path '@pid'
26                , node_kind       varchar2(30)    path '@kind'
27                , node_position   for ordinality
28         ) x
29  )
30  CONNECT BY PRIOR node_id = parent_node_id
31  START WITH parent_node_id IS NULL
32  ORDER SIBLINGS BY node_position
33  ;
NODE_ID    PARENT_NOD NODE_NAME                      NODE_VALUE                               XPATH
K1                    Product                                                                 /Product[1]
K2         K1         Type                           Laptop                                   /Product[1]/@Type
K3         K1         Notebook                                                                /Product[1]/Notebook[1]
K4         K3         Brand                          HP                                       /Product[1]/Notebook[1]/@Brand
K5         K3         Model                          Pavilion dv6-3132TX Notebook             /Product[1]/Notebook[1]/@Model
K6         K3         Harddisk                       640 GB                                   /Product[1]/Notebook[1]/Harddisk[1]
K8         K3         Processor                      Intel Core i7                            /Product[1]/Notebook[1]/Processor[1]
K10        K3         RAM                            4 GB                                     /Product[1]/Notebook[1]/RAM[1]
K12        K1         Notebook                                                                /Product[1]/Notebook[2]
K13        K12        Brand                          HP                                       /Product[1]/Notebook[2]/@Brand
K14        K12        Model                          HP Pavilion dv6-3032TX Notebook          /Product[1]/Notebook[2]/@Model
K15        K12        Harddisk                       640 GB                                   /Product[1]/Notebook[2]/Harddisk[1]
K17        K12        Processor                      Intel Core i7                            /Product[1]/Notebook[2]/Processor[1]
K19        K12        RAM                            6 GB                                     /Product[1]/Notebook[2]/RAM[1]
K21        K1         Notebook                                                                /Product[1]/Notebook[3]
K22        K21        Brand                          Toshiba                                  /Product[1]/Notebook[3]/@Brand
K23        K21        Model                          Satellite A660/07R 3D Notebook           /Product[1]/Notebook[3]/@Model
K24        K21        Harddisk                       640 GB                                   /Product[1]/Notebook[3]/Harddisk[1]
K26        K21        Processor                      Intel Core i7                            /Product[1]/Notebook[3]/Processor[1]
K28        K21        RAM                            4 GB                                     /Product[1]/Notebook[3]/RAM[1]
K30        K1         Notebook                                                                /Product[1]/Notebook[4]
K31        K30        Brand                          Toshiba                                  /Product[1]/Notebook[4]/@Brand
K32        K30        Model                          Satellite A660/15J Notebook              /Product[1]/Notebook[4]/@Model
K33        K30        Harddisk                       640 GB                                   /Product[1]/Notebook[4]/Harddisk[1]
K35        K30        Processor                      Intel Core i5                            /Product[1]/Notebook[4]/Processor[1]
K37        K30        RAM                            6 GB                                     /Product[1]/Notebook[4]/RAM[1]
26 rows selected

Similar Messages

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    hey i have found the solution myself :)

  • Strange error in SDO_ROUTER_PARTITION.PARTITION_ROUTER

    Hi,
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  • RoutingEngineException

    Hi,
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    Hi Siva / Cfreiwal,
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    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
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    SQL> select unique(SOURCE_P_ID) from edge_part;
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    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    32 rows selected.
    Looking forward for a quick response..
    Thanks and Regards
    Ashish Dhawan

  • Query on Topology for working with Routing Server

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  • ROUTING SERVER ERROR

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  • Exception while Route Requests using un-geocoded addresses

    Hi,
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    Hi Siva,
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    1|(2001, 8307, (2188960.66, 648363.592, ), , )|2
    2|(2001, 8307, (2189028.967, 647964.749, ), , )|2
    3|(2001, 8307, (2189230.556, 647707.982, ), , )|2
    4|(2001, 8307, (2189455.414, 648925.465, ), , )|2
    5|(2001, 8307, (2189561.739, 639546.905, ), , )|2
    6|(2001, 8307, (2189685.175, 643866.604, ), , )|2
    7|(2001, 8307, (2189711.672, 646828.068, ), , )|2
    8|(2001, 8307, (2189800.212, 643839.681, ), , )|2
    9|(2001, 8307, (2189819.514, 644169.93, ), , )|2
    10|(2001, 8307, (2189841.689, 648495.18, ), , )|2
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    1|50|57|2|2|10.5||(2002, 8307, , (1, 2, 1, , , , , , , ), (2191225.85, 649495.947, 2191525.681, 649506.262, , , , , , , , , , , , , , ))|Shady Lane
    2|69|73|2|2|10.5||(2002, 8307, , (1, 2, 1, , , , , , , , , , , , , , ), (2191934.235, 649451.044, 2192022.915, 649859.637, 2192120.978, 650151.819, , , , , , , , , , , , ))|Wilson's Mills
    3|57|69|2|2|10.5||(2002, 8307, , (1, 2, 1, , , , , , , , , , , , , ), (2191525.681, 649506.262, 2191583.829, 649531.754, 2191934.235, 649451.044, , , , , , , , , , , , , ))|Shady Lane
    4|96|97|2|2|10.5||(2002, 8307, , (1, 2, 1, , , , , , , , , , , , ), (2193317.397, 649360.341, 2193348.534, 649693.946, , , , , , , , , , , , , ))|Hillcrest
    5|68|69|2|2|10.5||(2002, 8307, , (1, 2, 1, , , , , , , , , , , , , , ), (2191918.389, 649325.733, 2191934.235, 649451.044, , , , , , , , , , , , ))|Wilson's Mills
    6|96|102|2|2|10.5||(2002, 8307, , (1, 2, 1, , , , , , , , , ), (2193317.397, 649360.341, 2193560.118, 649187.223, , , , , , , , , , , , ))|Poplar
    Thanks and Regards
    Aravindan

  • Oracle Routing NEW_PARTITION object

    Hi forum,
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    Do Nov 12 13:52:11 2009
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    Do Nov 12 13:52:11 2009
    INFO: cleanup partitioning temporary tables
    Do Nov 12 13:52:11 2009
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