ORA-19279 error extracting one-to-many sequence

Question

I have an xml table built from a registered schema that I'm trying to extract data from using a view. The lowest level is a polygon with multiple vertices -- vertices number, latitude, and longitude. The xml file lists data as
POLYGON
SEQ_NUM
LAT
LON
SEQ_NUM
LAT
LON
SEQ_NUM
LAT
LON
/POLYGON
The method I use to extract the data returns an ORA-19279 error: "XQuery dymanic type mismatch: expected singleton sequence - got multi-item sequence." The error is pointing to the polygon data; however the polygon sequence tag in the xsd file has the attribute of maxOccurs="unbounded".
Below is the xsd file, a samlpe xml file and the Select statement I use.
ABC.xsd file:
<?xml version="1.0"?>
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"
elementFormDefault="qualified" attributeFormDefault="unqualified">
<xs:element name="A_B_C">
<xs:complexType>
<xs:sequence>
<xs:element name="A">
<xs:complexType>
<xs:sequence>
<xs:element name="B">
<xs:simpleType>
<xs:restriction base="xs:string">
<xs:enumeration value="1A"/>
<xs:enumeration value="1B"/>
<xs:enumeration value="2A"/>
<xs:enumeration value="2B"/>
<xs:enumeration value="2C"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:choice>
<xs:element name="D" maxOccurs="unbounded">
<xs:complexType>
<xs:sequence>
<xs:element name="D_ID" type="xs:string">
</xs:element>
<xs:element name="D_UQ_ID" type="xs:string">
</xs:element>
<xs:element name="D_TIME">
<xs:simpleType>
<xs:restriction base="xs:string"/>
</xs:simpleType>
</xs:element>
<xs:choice>
<xs:element name="F">
<xs:complexType>
<xs:sequence>
<xs:element name="F_TYPE" type="xs:string">
</xs:element>
<xs:element name="F_SUBTYPE" type="xs:string">
</xs:element>
<xs:element name="G" minOccurs="0">
<xs:complexType>
<xs:choice>
<xs:element name="H">
<xs:complexType>
<xs:sequence>
<xs:element name="H_TYPE" type="xs:string" minOccurs="0">
</xs:element>
<xs:element name="H_MODE" type="xs:string" minOccurs="0">
</xs:element>
<xs:element name="H_SHAPE" minOccurs="0">
<xs:complexType>
<xs:choice>
<xs:element name="POLYGON">
<xs:complexType>
{color:#ff0000}*<xs:sequence maxOccurs="unbounded">*{color}
<xs:element name="SEQ_NUM" type="xs:unsignedInt">
<xs:annotation>
<xs:documentation>sequence number in the polygon</xs:documentation>
</xs:annotation>
</xs:element>
<xs:element name="LAT" type="xs:float"/>
<xs:element name="LON" type="xs:float"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="CIRCLE">
<xs:complexType>
<xs:sequence>
<xs:element name="LAT" type="xs:float"/>
<xs:element name="LON" type="xs:float"/>
<xs:element name="RAD" type="xs:float"/>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="ELLIPSE">
<xs:complexType>
<xs:sequence>
<xs:element name="ORIENT">
<xs:simpleType>
<xs:restriction base="xs:float">
<xs:minInclusive value="0"/>
<xs:maxInclusive value="360"/>
</xs:restriction>
</xs:simpleType>
</xs:element>
<xs:element name="MAJ_AX" type="xs:float">
</xs:element>
<xs:element name="MIN_AX" type="xs:float">
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:choice>
</xs:complexType>
</xs:element>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="E">
<xs:complexType/>
</xs:element>
</xs:choice>
</xs:sequence>
</xs:complexType>
</xs:element>
<xs:element name="C">
</xs:element>
</xs:choice>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
abc.xml file:
<?xml version="1.0" encoding="utf-8"?>
<A_B_C>
<A>
<B>1B</B>
</A>
<D>
<D_ID>D_0001</D_ID>
<D_UQ_ID>UQ_D_0001</D_UQ_ID>
<D_TIME>2007 FEB 11:11:11.11</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
<G>
<H>
<H_TYPE>Ipod</H_TYPE>
<H_MODE>SCANNING</H_MODE>
<H_SHAPE>
<POLYGON>
<SEQ_NUM>1</SEQ_NUM>
<LAT>10.1</LAT>
<LON>11.1</LON>
<SEQ_NUM>2</SEQ_NUM>
<LAT>20.2</LAT>
<LON>22.2</LON>
<SEQ_NUM>3</SEQ_NUM>
<LAT>30.3</LAT>
<LON>33.3</LON>
<SEQ_NUM>4</SEQ_NUM>
<LAT>40.4</LAT>
<LON>44.4</LON>
</POLYGON>
<CIRCLE>
<LAT>12.3</LAT>
<LON>45.6</LON>
<RAD>78.9</RAD>
</CIRCLE>
<ELLIPSE>
<ORIENT>99.90</ORIENT>
<MAJ_AX>111.10</MAJ_AX>
<MIN_AX>222.20</MIN_AX>
</ELLIPSE>
</H_SHAPE>
</H>
</G>
</F>
<E></E>
</D>
<D>
<D_ID>D_0002</D_ID>
<D_UQ_ID>UQ_D_0002</D_UQ_ID>
<D_TIME>2007 FEB 22:22:22.22</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
<G>
<H>
<H_TYPE>Ipod</H_TYPE>
<H_MODE>SCANNING</H_MODE>
<H_SHAPE>
<POLYGON>
<SEQ_NUM>1</SEQ_NUM>
<LAT>10.1</LAT>
<LON>11.1</LON>
<SEQ_NUM>2</SEQ_NUM>
<LAT>20.2</LAT>
<LON>22.2</LON>
<SEQ_NUM>3</SEQ_NUM>
<LAT>30.3</LAT>
<LON>33.3</LON>
<SEQ_NUM>4</SEQ_NUM>
<LAT>40.4</LAT>
<LON>44.4</LON>
</POLYGON>
<CIRCLE>
<LAT>12.3</LAT>
<LON>45.6</LON>
<RAD>78.9</RAD>
</CIRCLE>
<ELLIPSE>
<ORIENT>99.90</ORIENT>
<MAJ_AX>111.10</MAJ_AX>
<MIN_AX>222.20</MIN_AX>
</ELLIPSE>
</H_SHAPE>
</H>
</G>
</F>
<E></E>
</D>
<D>
<D_ID>D_0003</D_ID>
<D_UQ_ID>UQ_D_0003</D_UQ_ID>
<D_TIME>2007 FEB 33:33:33.33</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
<G>
<H>
<H_TYPE>Ipod</H_TYPE>
<H_MODE>SCANNING</H_MODE>
</H>
</G>
</F>
<E></E>
</D>
<D>
<D_ID>D_0004</D_ID>
<D_UQ_ID>UQ_D_0004</D_UQ_ID>
<D_TIME>2007 FEB 44:44:44.44</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
<G>
<H>
<H_TYPE>Ipod</H_TYPE>
<H_MODE>SCANNING</H_MODE>
<H_SHAPE>
<POLYGON>
<SEQ_NUM>1</SEQ_NUM>
<LAT>10.1</LAT>
<LON>11.1</LON>
<SEQ_NUM>2</SEQ_NUM>
<LAT>20.2</LAT>
<LON>22.2</LON>
<SEQ_NUM>3</SEQ_NUM>
<LAT>30.3</LAT>
<LON>33.3</LON>
<SEQ_NUM>4</SEQ_NUM>
<LAT>40.4</LAT>
<LON>44.4</LON>
</POLYGON>
<CIRCLE>
<LAT>12.3</LAT>
<LON>45.6</LON>
<RAD>78.9</RAD>
</CIRCLE>
<ELLIPSE>
<ORIENT>99.90</ORIENT>
<MAJ_AX>111.10</MAJ_AX>
<MIN_AX>222.20</MIN_AX>
</ELLIPSE>
</H_SHAPE>
</H>
</G>
</F>
<E></E>
</D>
<D>
<D_ID>D_0005</D_ID>
<D_UQ_ID>UQ_D_0005</D_UQ_ID>
<D_TIME>2007 FEB 55:55:55.55</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
</F>
<E></E>
</D>
<D>
<D_ID>D_0006</D_ID>
<D_UQ_ID>UQ_D_0006</D_UQ_ID>
<D_TIME>2007 FEB 66:66:66.66</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
<G>
<H>
<H_TYPE>Ipod</H_TYPE>
<H_MODE>SCANNING</H_MODE>
<H_SHAPE>
<POLYGON>
<SEQ_NUM>1</SEQ_NUM>
<LAT>10.1</LAT>
<LON>11.1</LON>
<SEQ_NUM>2</SEQ_NUM>
<LAT>20.2</LAT>
<LON>22.2</LON>
<SEQ_NUM>3</SEQ_NUM>
<LAT>30.3</LAT>
<LON>33.3</LON>
<SEQ_NUM>4</SEQ_NUM>
<LAT>40.4</LAT>
<LON>44.4</LON>
</POLYGON>
<CIRCLE>
<LAT>12.3</LAT>
<LON>45.6</LON>
<RAD>78.9</RAD>
</CIRCLE>
<ELLIPSE>
<ORIENT>99.90</ORIENT>
<MAJ_AX>111.10</MAJ_AX>
<MIN_AX>222.20</MIN_AX>
</ELLIPSE>
</H_SHAPE>
</H>
</G>
</F>
<E></E>
</D>
<D>
<D_ID>D_0007</D_ID>
<D_UQ_ID>UQ_D_0007</D_UQ_ID>
<D_TIME>2007 FEB 77:77:77.77</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
<G>
<H>
<H_TYPE>Ipod</H_TYPE>
<H_MODE>SCANNING</H_MODE>
</H>
</G>
</F>
<E></E>
</D>
<D>
<D_ID>D_0008</D_ID>
<D_UQ_ID>UQ_D_0008</D_UQ_ID>
<D_TIME>2007 FEB 88:88:88.88</D_TIME>
<F>
<F_TYPE>F_TYPE_TEST</F_TYPE>
<F_SUBTYPE>SUB_TEST</F_SUBTYPE>
<G>
<H>
<H_TYPE>Ipod</H_TYPE>
<H_MODE>SCANNING</H_MODE>
<H_SHAPE>
<POLYGON>
<SEQ_NUM>1</SEQ_NUM>
<LAT>10.1</LAT>
<LON>11.1</LON>
<SEQ_NUM>2</SEQ_NUM>
<LAT>20.2</LAT>
<LON>22.2</LON>
<SEQ_NUM>3</SEQ_NUM>
<LAT>30.3</LAT>
<LON>33.3</LON>
<SEQ_NUM>4</SEQ_NUM>
<LAT>40.4</LAT>
<LON>44.4</LON>
</POLYGON>
<CIRCLE>
<LAT>12.3</LAT>
<LON>45.6</LON>
<RAD>78.9</RAD>
</CIRCLE>
<ELLIPSE>
<ORIENT>88.80</ORIENT>
<MAJ_AX>111.10</MAJ_AX>
<MIN_AX>222.20</MIN_AX>
</ELLIPSE>
</H_SHAPE>
</H>
</G>
</F>
<E></E>
</D>
<C>TPS Report 4</C>
</A_B_C>
SELECT statement:
SELECT a_level.a_class
, d_level.D_UQ_ID
, d_level.D_TIME
, h_level.SEQ_NUM
, h_level.LAT
, h_level.LON
FROM ABC_XML,
XMLTABLE('/A_B_C'
PASSING ABC_XML.ABC_SPEC
COLUMNS
A_CLASS VARCHAR2(4000 BYTE) PATH '/A_B_C/A/B'
, D XMLTYPE PATH 'D'
) a_level,
XMLTABLE ('/D'
PASSING a_level.D
COLUMNS
D_UQ_ID varchar2(4000) PATH 'D_UQ_ID'
, D_TIME varchar2(4000) PATH 'D_TIME'
, POLYGON XMLTYPE PATH 'F/G/H/H_SHAPE/POLYGON'
) d_level
XMLTABLE('/POLYGON'
passing d_level.POLYGON
COLUMNS
SEQ_NUM NUMBER PATH 'SEQ_NUM'
, LAT NUMBER PATH 'LAT)'
, LON NUMBER PATH 'LON'
) h_level;
As you see I need to return data from three levels of data (a, d and h). I can remark out the bottom level (h_level) and the statement runs returning 8 rows from the xml file above (which is correct). The h_level XMLTABLE reference returns the ORA-19279 error. The full statement should return 20 rows of data.

Answer 1

Yes. I looked at that string.
Never mind on this one. You helped solve the problem in another string
XMLTable 'For $i in ... return ROW' clause help needed