Help Center/ GaussDB(DWS)/ SQL Syntax Reference/ SQL Syntax Reference (8.3.0.x)/ Functions and Operators/ XML Functions/ Mapping a Table to XML
Updated on 2024-04-28 GMT+08:00
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Mapping a Table to XML

table_to_xml(tbl regclass, nulls boolean, tableforest boolean, targetns text)

Description: Maps the contents of a table to XML values.

Return type: XML

table_to_xmlschema(tbl regclass, nulls boolean, tableforest boolean, targetns text)

Description: Maps a relational table schema to an XML schema document.

Return type: XML

table_to_xml_and_xmlschema(tbl regclass, nulls boolean, tableforest boolean, targetns text)

Description: Maps a relational table to XML values and schema documents.

Return type: XML

query_to_xml(query text, nulls boolean, tableforest boolean, targetns text)

Description: Maps the contents of an SQL query to XML values.

Return type: XML

query_to_xmlschema(query text, nulls boolean, tableforest boolean, targetns text)

Description: Maps an SQL query into an XML schema document.

Return type: XML

query_to_xml_and_xmlschema(query text, nulls boolean, tableforest boolean, targetns text)

Description: Maps SQL queries to XML values and schema documents.

Return type: XML

cursor_to_xml(cursor refcursor, count int, nulls boolean, tableforest boolean, targetns text)

Description: Maps a cursor query to an XML value.

Return type: XML

cursor_to_xmlschema(cursor refcursor, nulls boolean, tableforest boolean, targetns text)

Description: Maps a cursor query to an XML schema document.

Return type: XML

schema_to_xml(schema name, nulls boolean, tableforest boolean, targetns text)

Description: Maps a table in a schema to an XML value.

Return type: XML

schema_to_xmlschema(schema name, nulls boolean, tableforest boolean, targetns text)

Description: Maps a table in a schema to an XML schema document.

Return type: XML

schema_to_xml_and_xmlschema(schema name, nulls boolean, tableforest boolean, targetns text)

Description: Maps a table in a schema to an XML value and a schema document.

Return type: XML

database_to_xml(nulls boolean, tableforest boolean, targetns text)

Description: Maps a database table to an XML value.

Return type: XML

database_to_xmlschema(nulls boolean, tableforest boolean, targetns text)

Description: Maps a database table to an XML schema document.

Return type: XML

database_to_xml_and_xmlschema(nulls boolean, tableforest boolean, targetns text)

Description: Maps database tables to XML values and schema documents.

Return type: XML

The parameters for mapping a table to an XML value are described as follows:

  • tbl: table name.
  • nulls: indicates whether the output contains null values. If the value is true, the null value in the column is <columnname xsi:nil="true"/>. If the value is false, the columns containing null values are omitted from the output.
  • tableforest: If this parameter is set to true, XML fragments are generated. If this parameter is set to false, XML files are generated.
  • targetns: specifies the XML namespace of the desired result. If this parameter is not specified, an empty string is passed.
  • query: SQL query statement
  • cursor: cursor name
  • count: amount of data obtained from the cursor
  • schema: schema name
Parent topic: XML Functions