PREHOOK: query: DESCRIBE FUNCTION xpath_number
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION xpath_number
POSTHOOK: type: DESCFUNCTION
xpath_number(xml, xpath) - Returns a double value that matches the xpath expression
PREHOOK: query: DESCRIBE FUNCTION EXTENDED xpath_number
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED xpath_number
POSTHOOK: type: DESCFUNCTION
xpath_number(xml, xpath) - Returns a double value that matches the xpath expression
Synonyms: xpath_double
Example:
  > SELECT xpath_number('<a><b>1</b><b>2</b></a>','sum(a/b)') FROM src LIMIT 1;
  3.0
PREHOOK: query: DESCRIBE FUNCTION xpath_double
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION xpath_double
POSTHOOK: type: DESCFUNCTION
xpath_double(xml, xpath) - Returns a double value that matches the xpath expression
PREHOOK: query: DESCRIBE FUNCTION EXTENDED xpath_double
PREHOOK: type: DESCFUNCTION
POSTHOOK: query: DESCRIBE FUNCTION EXTENDED xpath_double
POSTHOOK: type: DESCFUNCTION
xpath_double(xml, xpath) - Returns a double value that matches the xpath expression
Synonyms: xpath_number
Example:
  > SELECT xpath_double('<a><b>1</b><b>2</b></a>','sum(a/b)') FROM src LIMIT 1;
  3.0
PREHOOK: query: SELECT xpath_double ('<a>this is not a number</a>', 'a') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a>this is not a number</a>', 'a') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
NaN
PREHOOK: query: SELECT xpath_double ('<a>this 2 is not a number</a>', 'a') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a>this 2 is not a number</a>', 'a') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
NaN
PREHOOK: query: SELECT xpath_double ('<a><b>2000000000</b><c>40000000000</c></a>', 'a/b * a/c') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a><b>2000000000</b><c>40000000000</c></a>', 'a/b * a/c') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
8.0E19
PREHOOK: query: SELECT xpath_double ('<a>try a boolean</a>', 'a = 10') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a>try a boolean</a>', 'a = 10') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
0.0
PREHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'a/b') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'a/b') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
1.0
PREHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'sum(a/*)') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'sum(a/*)') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
15.0
PREHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'sum(a/b)') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'sum(a/b)') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
7.0
PREHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'sum(a/b[@class="odd"])') FROM src LIMIT 1
PREHOOK: type: QUERY
PREHOOK: Input: default@src
#### A masked pattern was here ####
POSTHOOK: query: SELECT xpath_double ('<a><b class="odd">1</b><b class="even">2</b><b class="odd">4</b><c>8</c></a>', 'sum(a/b[@class="odd"])') FROM src LIMIT 1
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
#### A masked pattern was here ####
5.0