Oracle9i SQL Reference Release 1 (9.0.1) Part Number A90125-01 |
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Functions, 37 of 166
dump::=
dump
DUMP
returns a VARCHAR2
value containing the datatype code, length in bytes, and internal representation of expr. The returned result is always in the database character set. For the datatype corresponding to each code, see Table 2-1.
The argument return_fmt specifies the format of the return value and can have any of the following values:
By default, the return value contains no character set information. To retrieve the character set name of expr, specify any of the format values above, plus 1000. For example, a return_fmt of 1008 returns the result in octal, plus provides the character set name of expr
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The arguments start_position and length combine to determine which portion of the internal representation to return. The default is to return the entire internal representation in decimal notation.
If expr is null, this function returns a null.
Note:
This function does not support |
The following examples show how to extract dump information from a string expression and a column:
SELECT DUMP('abc', 1016) FROM DUAL; DUMP('ABC',1016) ------------------------------------------ Typ=96 Len=3 CharacterSet=WE8DEC: 61,62,63 SELECT DUMP(last_name, 8, 3, 2) "OCTAL" FROM employees WHERE last_name = 'Hunold'; OCTAL ------------------------------------------------------------------- Typ=1 Len=6: 156,157 SELECT DUMP(last_name, 10, 3, 2) "ASCII" FROM employees WHERE last_name = 'Hunold'; ASCII -------------------------------------------------------------------- Typ=1 Len=6: 110,111
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