Question

我有一个XML文件，我加载到XMLType变量中，我想从具有不同属性值的几个.../ExtendedData/SchemaData/SimpleData节点和一个.../Polygon/outerBoundaryIs/LinearRing/coordinates节点中提取不同的值，将它们插入此表中：

CREATE TABLE LIE_GEOF
(
IDE_GEO VARCHAR2(24) NOT NULL,
COD_COM VARCHAR2(3) ,
COD_VIL VARCHAR2(5) ,
NOM_COM VARCHAR2(50) ,
ALT_MOY NUMBER(4,0) ,
SUP_HEC NUMBER(12,0) ,
NBR_POP NUMBER(10,0) ,
COD_ARR VARCHAR2(1) ,
COD_DEP VARCHAR2(2) ,
NOM_DEP VARCHAR2(30) ,
COD_REG VARCHAR2(2) NOT NULL,
NOM_REG VARCHAR2(35) NOT NULL,
TXT_POL CLOB ,
CONSTRAINT LIE_GEOF_PK PRIMARY KEY (IDE_GEO) USING INDEX
);

插入必须遵循以下规则：

具有特定属性值的/Document/Folder/Placemark/ExtendedData/SchemaData/SimpleData个节点的值进入表格的11个第一个字段。
节点/Document/Folder/Placemark/Polygon/outerBoundaryIs/LinearRing/coordinates的值进入表的最后一个字段（TXT_POL，这是一个CLOB）。

E.g。插入：

COMMUNE0000000000000000进入ID_GEOFLA
216进入COD_COM
...
0.523147623541907,43.45799199978569 0.523016926446493,43.458214941462735 ... into TXT_POL

这是我的XML文件：

<?xml version="1.0" encoding="utf-8" ?>
<kml xmlns="http://www.opengis.net/kml/2.2">
<Document id="root_doc">
<Schema name="COMMUNE" id="COMMUNE">
<SimpleField name="ID_GEOFLA" type="string"></SimpleField>
<SimpleField name="CODE_COM" type="string"></SimpleField>
<SimpleField name="INSEE_COM" type="string"></SimpleField>
<SimpleField name="NOM_COM" type="string"></SimpleField>
<SimpleField name="STATUT" type="string"></SimpleField>
<SimpleField name="X_CHF_LIEU" type="int"></SimpleField>
<SimpleField name="Y_CHF_LIEU" type="int"></SimpleField>
<SimpleField name="X_CENTROID" type="int"></SimpleField>
<SimpleField name="Y_CENTROID" type="int"></SimpleField>
<SimpleField name="Z_MOYEN" type="int"></SimpleField>
<SimpleField name="SUPERFICIE" type="float"></SimpleField>
<SimpleField name="POPULATION" type="int"></SimpleField>
<SimpleField name="CODE_ARR" type="string"></SimpleField>
<SimpleField name="CODE_DEPT" type="string"></SimpleField>
<SimpleField name="NOM_DEPT" type="string"></SimpleField>
<SimpleField name="CODE_REG" type="string"></SimpleField>
<SimpleField name="NOM_REG" type="string"></SimpleField>
</Schema>
<Folder><name>COMMUNE</name>
<Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#COMMUNE">
<SimpleData name="ID_GEOFLA">COMMUNE00000000000000001</SimpleData>
<SimpleData name="CODE_COM">216</SimpleData>
<SimpleData name="INSEE_COM">32216</SimpleData>
<SimpleData name="NOM_COM">LOURTIES-MONBRUN</SimpleData>
<SimpleData name="STATUT">Commune simple</SimpleData>
<SimpleData name="X_CHF_LIEU">500820</SimpleData>
<SimpleData name="Y_CHF_LIEU">6264958</SimpleData>
<SimpleData name="X_CENTROID">500515</SimpleData>
<SimpleData name="Y_CENTROID">6265413</SimpleData>
<SimpleData name="Z_MOYEN">252</SimpleData>
<SimpleData name="SUPERFICIE">966</SimpleData>
<SimpleData name="POPULATION">139</SimpleData>
<SimpleData name="CODE_ARR">3</SimpleData>
<SimpleData name="CODE_DEPT">32</SimpleData>
<SimpleData name="NOM_DEPT">GERS</SimpleData>
<SimpleData name="CODE_REG">76</SimpleData>
<SimpleData name="NOM_REG">LANGUEDOC-ROUSSILLON-MIDI-PYRENEES</SimpleData>
</SchemaData></ExtendedData>
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</Placemark>
<Placemark>
<Style><LineStyle><color>ff0000ff</color></LineStyle><PolyStyle><fill>0</fill></PolyStyle></Style>
<ExtendedData><SchemaData schemaUrl="#COMMUNE">
<SimpleData name="ID_GEOFLA">COMMUNE00000000000000002</SimpleData>
<SimpleData name="CODE_COM">033</SimpleData>
<SimpleData name="INSEE_COM">47033</SimpleData>
<SimpleData name="NOM_COM">BOUDY-DE-BEAUREGARD</SimpleData>
<SimpleData name="STATUT">Commune simple</SimpleData>
<SimpleData name="X_CHF_LIEU">516424</SimpleData>
<SimpleData name="Y_CHF_LIEU">6384852</SimpleData>
<SimpleData name="X_CENTROID">515575</SimpleData>
<SimpleData name="Y_CENTROID">6385938</SimpleData>
<SimpleData name="Z_MOYEN">112</SimpleData>
<SimpleData name="SUPERFICIE">1019</SimpleData>
<SimpleData name="POPULATION">414</SimpleData>
<SimpleData name="CODE_ARR">3</SimpleData>
<SimpleData name="CODE_DEPT">47</SimpleData>
<SimpleData name="NOM_DEPT">LOT-ET-GARONNE</SimpleData>
<SimpleData name="CODE_REG">75</SimpleData>
<SimpleData name="NOM_REG">AQUITAINE-LIMOUSIN-POITOU-CHARENTES</SimpleData>
</SchemaData></ExtendedData>
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<ExtendedData><SchemaData schemaUrl="#COMMUNE">
<SimpleData name="ID_GEOFLA">COMMUNE00000000000000003</SimpleData>
<SimpleData name="CODE_COM">009</SimpleData>
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<SimpleData name="NOM_COM">ARMOUS-ET-CAU</SimpleData>
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<SimpleData name="Z_MOYEN">221</SimpleData>
<SimpleData name="SUPERFICIE">932</SimpleData>
<SimpleData name="POPULATION">95</SimpleData>
<SimpleData name="CODE_ARR">3</SimpleData>
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<SimpleData name="NOM_DEPT">GERS</SimpleData>
<SimpleData name="CODE_REG">76</SimpleData>
<SimpleData name="NOM_REG">LANGUEDOC-ROUSSILLON-MIDI-PYRENEES</SimpleData>
</SchemaData></ExtendedData>
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<ExtendedData><SchemaData schemaUrl="#COMMUNE">
<SimpleData name="ID_GEOFLA">COMMUNE00000000000000005</SimpleData>
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<SimpleData name="INSEE_COM">62890</SimpleData>
<SimpleData name="NOM_COM">WILLEMAN</SimpleData>
<SimpleData name="STATUT">Commune simple</SimpleData>
<SimpleData name="X_CHF_LIEU">640049</SimpleData>
<SimpleData name="Y_CHF_LIEU">7028672</SimpleData>
<SimpleData name="X_CENTROID">640115</SimpleData>
<SimpleData name="Y_CENTROID">7029900</SimpleData>
<SimpleData name="Z_MOYEN">79</SimpleData>
<SimpleData name="SUPERFICIE">1023</SimpleData>
<SimpleData name="POPULATION">178</SimpleData>
<SimpleData name="CODE_ARR">4</SimpleData>
<SimpleData name="CODE_DEPT">62</SimpleData>
<SimpleData name="NOM_DEPT">PAS-DE-CALAIS</SimpleData>
<SimpleData name="CODE_REG">32</SimpleData>
<SimpleData name="NOM_REG">NORD-PAS-DE-CALAIS-PICARDIE</SimpleData>
</SchemaData></ExtendedData>
<Polygon><outerBoundaryIs><LinearRing><coordinates>2.151357610477108,50.342723579428736 2.150582398840049,50.343853128809613 2.150439420398362,50.344345961981944 2.147781898036236,50.348429901247719 2.144643960903647,50.352848920107654 2.142170362713468,50.354312287967623 2.139785273502974,50.354442932204655 2.139147310728909,50.356057285129864 2.136459688875384,50.361894178627317 2.136303634967463,50.362073550534305 2.136457891197435,50.362163514907749 2.143309717417935,50.367975295072092 2.149574739686743,50.375379804640581 2.151353800635636,50.377701211726055 2.152307917736184,50.378321866071232 2.155756214194353,50.379913059929052 2.154864354931062,50.380685355552338 2.155973798477377,50.381259457705227 2.156409086307008,50.380669881870404 2.157182705972685,50.37999822017963 2.158308050333875,50.379282265278022 2.159644626590358,50.378610832073001 2.166473449179359,50.37565036238319 2.167106098271396,50.375426588179472 2.167893230445291,50.375114070985006 2.168055448620143,50.374896996422471 2.168526372902896,50.37426272358401 2.169092409895663,50.373051795846251 2.169942448266939,50.370531964916502 2.170719245301723,50.368962416427962 2.175080979569476,50.369372312649269 2.183859825720376,50.370773789773402 2.18505079929214,50.370999825609218 2.185191902200479,50.370954968509238 2.18564361921614,50.370190318886401 2.184787545948869,50.370002412843633 2.183708661363136,50.369617304240514 2.182463727449356,50.36830454074083 2.181402963860765,50.366544971983508 2.182476664280656,50.364123484539761 2.185726357443533,50.356526912933504 2.186427269755563,50.356662618447764 2.186638577991434,50.356438655774838 2.187202454197396,50.355496954539362 2.188401939261542,50.353075312390636 2.186319206527587,50.348124388463035 2.184784410495321,50.343586432428438 2.184713679145266,50.343361503403536 2.18317169343704,50.343538954992638 2.166941973276032,50.344953195994378 2.152128396725606,50.342859066974349 2.151357610477108,50.342723579428736</coordinates></LinearRing></outerBoundaryIs></Polygon>
</Placemark>
</Folder>
</Document></kml>

到目前为止我尝试的是提取与属性ID_GEOFLA匹配的节点值;但这没有用：

CREATE OR REPLACE PROCEDURE load_xml (p_dir       IN  VARCHAR2,
                                  p_filename  IN  VARCHAR2) AS
l_bfile  BFILE := BFILENAME(p_dir, p_filename);
l_clob   CLOB;
xml_data xmltype;
ID_GEOFLA varchar2(255);   

BEGIN

DBMS_LOB.createtemporary (l_clob, TRUE);
DBMS_LOB.fileopen(l_bfile, DBMS_LOB.file_readonly);
DBMS_LOB.loadfromfile(l_clob, l_bfile, DBMS_LOB.getlength(l_bfile));
DBMS_LOB.fileclose(l_bfile);

xml_data :=XMLTYPE.createXML(l_clob);

for x in (

select a.ID  
from 
   XMLTABLE('/Document/Folder/Placemark/ExtendedData/SchemaData'
          PASSING xml_data
          COLUMNS ID VARCHAR2(100) PATH '//SimpleData/text()'

         ) a) loop
         dbms_output.put_line(x.ID);

         end loop;

  DBMS_LOB.freetemporary (l_clob);

  END;
  /

如何将XML数据存入我的表格？

Answer 1

你有多个地标需要XMLTable XPath来引用它们;然后是列路径来引用每个节点，指定相关的属性：

xmltable(xmlnamespaces(default 'http://www.opengis.net/kml/2.2'),
    '/kml/Document/Folder/Placemark'
  passing xmltype(l_clob)
  columns ide_geo varchar2(24) path 'ExtendedData/SchemaData/SimpleData[@name="ID_GEOFLA"]',
    cod_com varchar2(3) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_COM"]',
    cod_vil varchar2(5) path 'ExtendedData/SchemaData/SimpleData[@name="INSEE_COM"]',
    nom_com varchar2(50) path 'ExtendedData/SchemaData/SimpleData[@name="NOM_COM"]',
    alt_moy number(4,0) path 'ExtendedData/SchemaData/SimpleData[@name="Z_MOYEN"]',
    sup_hec number(12,0) path 'ExtendedData/SchemaData/SimpleData[@name="SUPERFICIE"]',
    nbr_pop number(10,0) path 'ExtendedData/SchemaData/SimpleData[@name="POPULATION"]',
    cod_arr varchar2(1) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_ARR"]',
    cod_dep varchar2(2) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_DEPT"]',
    nom_dep varchar2(30) path 'ExtendedData/SchemaData/SimpleData[@name="NOM_DEPT"]',
    cod_reg varchar2(2) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_REG"]',
    nom_reg varchar2(35) path 'ExtendedData/SchemaData/SimpleData[@name="NOM_REG"]',
    txt_pol clob path 'Polygon/outerBoundaryIs/LinearRing/coordinates'
);

还要注意包含/kml根节点和默认命名空间的声明。

调整您的过程以使用从BFILE加载的CLOB，并使用单个insert ... select（不需要游标循环），您可以执行以下操作：

create or replace procedure load_xml (p_dir in  varchar2,
  p_filename  in  varchar2)
as
  l_clob clob;
  l_bfile bfile := bfilename(p_dir, p_filename);
  l_dest_offset pls_integer := 1;
  l_src_offset pls_integer := 1;
  l_lang_context pls_integer := 0;
  l_warning pls_integer;
begin
  dbms_lob.createtemporary (l_clob, true);
  dbms_lob.fileopen(l_bfile, dbms_lob.file_readonly);
  dbms_lob.loadclobfromfile(dest_lob=>l_clob,
    src_bfile=>l_bfile,
    amount=>dbms_lob.lobmaxsize,
    dest_offset=>l_dest_offset,
    src_offset=>l_src_offset,
    bfile_csid=>0,
    lang_context=>l_lang_context,
    warning=>l_warning);
  dbms_lob.fileclose(l_bfile);

  insert into lie_geof (ide_geo, cod_com, cod_vil, nom_com, alt_moy, sup_hec,
    nbr_pop, cod_arr, cod_dep, nom_dep, cod_reg, nom_reg, txt_pol)
  select ide_geo, cod_com, cod_vil, nom_com, alt_moy, sup_hec,
    nbr_pop, cod_arr, cod_dep, nom_dep, cod_reg, nom_reg, txt_pol
  from xmltable(xmlnamespaces(default 'http://www.opengis.net/kml/2.2'),
    '/kml/Document/Folder/Placemark'
    passing xmltype(l_clob)
    columns ide_geo varchar2(24) path 'ExtendedData/SchemaData/SimpleData[@name="ID_GEOFLA"]',
      cod_com varchar2(3) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_COM"]',
      cod_vil varchar2(5) path 'ExtendedData/SchemaData/SimpleData[@name="INSEE_COM"]',
      nom_com varchar2(50) path 'ExtendedData/SchemaData/SimpleData[@name="NOM_COM"]',
      alt_moy number(4,0) path 'ExtendedData/SchemaData/SimpleData[@name="Z_MOYEN"]',
      sup_hec number(12,0) path 'ExtendedData/SchemaData/SimpleData[@name="SUPERFICIE"]',
      nbr_pop number(10,0) path 'ExtendedData/SchemaData/SimpleData[@name="POPULATION"]',
      cod_arr varchar2(1) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_ARR"]',
      cod_dep varchar2(2) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_DEPT"]',
      nom_dep varchar2(30) path 'ExtendedData/SchemaData/SimpleData[@name="NOM_DEPT"]',
      cod_reg varchar2(2) path 'ExtendedData/SchemaData/SimpleData[@name="CODE_REG"]',
      nom_reg varchar2(35) path 'ExtendedData/SchemaData/SimpleData[@name="NOM_REG"]',
      txt_pol clob path 'Polygon/outerBoundaryIs/LinearRing/coordinates'
  );

  dbms_lob.freetemporary (l_clob);
end;
/

...当你的文件运行时，获取：

select * from lie_geof;

IDE_GEO                  COD COD_V NOM_COM                                               ALT_MOY    SUP_HEC    NBR_POP C CO NOM_DEP                        CO NOM_REG                             TXT_POL                                                                         
------------------------ --- ----- -------------------------------------------------- ---------- ---------- ---------- - -- ------------------------------ -- ----------------------------------- --------------------------------------------------------------------------------
COMMUNE00000000000000001 216 32216 LOURTIES-MONBRUN                                          252        966        139 3 32 GERS                           76 LANGUEDOC-ROUSSILLON-MIDI-PYRENEES  0.523147623541907,43.45799199978569 0.523016926446493,43.458214941462735 0.52281
COMMUNE00000000000000002 033 47033 BOUDY-DE-BEAUREGARD                                       112       1019        414 3 47 LOT-ET-GARONNE                 75 AQUITAINE-LIMOUSIN-POITOU-CHARENTES 0.662777282430262,44.533218568792947 0.662625822063777,44.533683684987352 0.6641
COMMUNE00000000000000003 009 32009 ARMOUS-ET-CAU                                             221        932         95 3 32 GERS                           76 LANGUEDOC-ROUSSILLON-MIDI-PYRENEES  0.211253773793326,43.587275605450763 0.211662108609333,43.586825129365288 0.2114
COMMUNE00000000000000004 225 38225 AUTRANS-MEAUDRE EN VERCORS                               1234       3371       2973 1 38 ISERE                          84 AUVERGNE-RHONE-ALPES                5.577223028135769,45.242894349342798 5.57832596943672,45.243222059527241 5.57940
COMMUNE00000000000000005 890 62890 WILLEMAN                                                   79       1023        178 4 62 PAS-DE-CALAIS                  32 NORD-PAS-DE-CALAIS-PICARDIE         2.151357610477108,50.342723579428736 2.150582398840049,50.343853128809613 2.1504

如何从XML中提取值并将其插入表中？

1 个答案: