DBCLOB
The DBCLOB function returns a graphic-string representation.
Integer to DBCLOB
Decimal to DBCLOB
Floating-point to DBCLOB
Decimal floating-point to DBCLOB
Character to DBCLOB
Graphic to DBCLOB
Datetime to DBCLOB
The DBCLOB function returns a graphic-string representation of:
- An integer number if the first argument is a SMALLINT, INTEGER, or BIGINT
- A decimal number if the first argument is a packed or zoned decimal number
- A double-precision floating-point number if the first argument is a DOUBLE or REAL
- A decimal floating-point number if the first argument is a DECFLOAT
- A character string if the first argument is any type of character string
- A graphic string if the first argument is any type of graphic string
- A date value if the first argument is a DATE.
- A time value if the first argument is a TIME.
- A timestamp value if the first argument is a TIMESTAMP.
The result of the function is a DBCLOB. If the first argument can be null, the result can be null; if the first argument is null, the result is the null value.
Integer to DBCLOB
- integer-expression
- An expression that returns a value that is a built-in integer data type (either SMALLINT, INTEGER, or BIGINT).
The result is a varying-length graphic string of the argument in the form of an SQL integer constant. The result consists of n characters that are the significant digits that represent the value of the argument with a preceding minus sign if the argument is negative. The result is left justified.
- If the argument is a small integer, the length attribute of the result is 6.
- If the argument is a large integer, the length attribute of the result is 11.
- If the argument is a big integer, the length attribute of the result is 20.
The actual length of the result is the smallest number of characters that can be used to represent the value of the argument. Leading zeroes are not included. If the argument is negative, the first character of the result is a minus sign. Otherwise, the first character is a digit or the decimal-character.
The CCSID of the result is 1200 (UTF-16).
Decimal to DBCLOB
- decimal-expression
- An expression that returns a value that is a built-in decimal data type (either DECIMAL or NUMERIC). If a different precision and scale is wanted, the DECIMAL scalar function can be used to make the change.
- decimal-character
- Specifies the single-byte character constant that is used to delimit the decimal digits in the result character string. The character must be a period or comma. If the second argument is not specified, the decimal point is the default decimal point. For more information, see Decimal point.
The result is a varying-length graphic string representation of the argument. The result includes a decimal character and up to p digits, where p is the precision of the decimal-expression with a preceding minus sign if the argument is negative. Leading zeros are not returned. Trailing zeros are returned. If the scale of decimal-expression is zero, the decimal character is not returned.
The length attribute of the result is 2+p where p is the precision of the decimal-expression. The actual length of the result is the smallest number of characters that can be used to represent the result, except that trailing characters are included. Leading zeros are not included. If the argument is negative, the result begins with a minus sign. Otherwise, the result begins with a digit or the decimal-character.
The CCSID of the result is 1200 (UTF-16).
Floating-point to DBCLOB
- floating-point expression
- An expression that returns a value that is a built-in floating-point data type (DOUBLE or REAL).
- decimal-character
- Specifies the single-byte character constant that is used to delimit the decimal digits in the result character string. The character must be a period or comma. If the second argument is not specified, the decimal point is the default decimal point. For more information, see Decimal point.
The result is a varying-length graphic string representation of the argument in the form of a floating-point constant.
The length attribute of the result is 24. The actual length of the result is the smallest number of characters that can represent the value of the argument such that the mantissa consists of a single digit other than zero followed by the decimal-character and a sequence of digits. If the argument is negative, the first character of the result is a minus sign; otherwise, the first character is a digit or the decimal-character. If the argument is zero, the result is 0E0.
The CCSID of the result is 1200 (UTF-16).
Decimal floating-point to DBCLOB
- decimal floating-point expression
- An expression that returns a value that is a built-in decimal floating-point data type.
- decimal-character
- Specifies the single-byte character constant that is used to delimit the decimal digits in the result character string. The character must be a period or comma. If the second argument is not specified, the decimal point is the default decimal point. For more information, see Decimal point.
The result is a varying-length graphic string representation of the argument in the form of a decimal floating-point constant.
The length attribute of the result is 42. The actual length of the result is the smallest number of characters that represents the value of the argument, including the sign, digits, and decimal-character. Trailing zeros are significant. If the argument is negative, the first character of the result is a minus sign; otherwise, the first character is a digit or the decimal-character. If the argument is zero, the result is 0.
If the DECFLOAT value is Infinity, sNaN, or NaN, the strings 'INFINITY', 'SNAN', and 'NAN', respectively, are returned. If the special value is negative, a minus sign will be the first character in the string. The DECFLOAT special value sNaN does not result in an exception when converted to a string.
The CCSID of the result is 1200 (UTF-16).
Character to DBCLOB
- character-expression
- An expression that returns a value that is a built-in character-string data type. It cannot be CHAR or VARCHAR bit data. If the expression is an empty string or the EBCDIC string X'0E0F', the result is an empty string.
- length
- An integer constant that specifies the length attribute
for the resulting varying length character string. The value must
be between 1 and 1 073 741 823.
If the second argument is not specified or DEFAULT is specified:
- If the character-expression is the empty string constant, the length attribute of the result is 1.
- Otherwise, the length attribute of the result is the same as the length attribute of the first argument.
The actual length of the result is the minimum of the length attribute of the result and the actual length of character-expression. If the length of the character-expression is greater than the length attribute of the result, truncation is performed. A warning (SQLSTATE 01004) is returned unless the truncated characters were all blanks.
- integer
- An integer constant that specifies the CCSID for the
resulting varying-length graphic string. It must be a DBCS, UTF-16,
or UCS-2 CCSID. The CCSID cannot be 65535.
In the following rules, S denotes one of the following:
- If the string expression is a host variable containing data in a foreign encoding scheme, S is the result of the expression after converting the data to a CCSID in a native encoding scheme. (See Character conversion for more information.)
- If the string expression is data in a native encoding scheme, S is that string expression.
If the third argument is not specified and the first argument is character, then the CCSID of the result is determined by a mixed CCSID. Let M denote that mixed CCSID. M is determined as follows:
- If the CCSID of S is a mixed CCSID, M is that CCSID.
- If the CCSID of S is an SBCS CCSID:
- If the CCSID of S has an associated mixed CCSID, M is that CCSID.
- Otherwise the operation is not allowed.
The following table summarizes the result CCSID based on M.
M Result CCSID Description DBCS Substitution Character 930 300 Japanese EBCDIC X'FEFE' 933 834 Korean EBCDIC X'FEFE' 935 837 S-Chinese EBCDIC X'FEFE' 937 835 T-Chinese EBCDIC X'FEFE' 939 300 Japanese EBCDIC X'FEFE' 5026 4396 Japanese EBCDIC X'FEFE' 5035 4396 Japanese EBCDIC X'FEFE'
If the result is DBCS-graphic data, the equivalence of SBCS and DBCS characters depends on M. Regardless of the CCSID, every double-byte code point in the argument is considered a DBCS character, and every single-byte code point in the argument is considered an SBCS character with the exception of the EBCDIC mixed data shift codes X'0E' and X'0F'.
- If the nth character of the argument is a DBCS character, the nth character of the result is that DBCS character.
- If the nth character of the argument is an SBCS character that has an equivalent DBCS character, the nth character of the result is that equivalent DBCS character.
- If the nth character of the argument is an SBCS character that does not have an equivalent DBCS character, the nth character of the result is the DBCS substitution character.
If the result is Unicode graphic data, each character of the argument determines a character of the result. The nth character of the result is the UTF-16 or UCS-2 equivalent of the nth character of the argument.
Graphic to DBCLOB
- graphic-expression
- An expression that returns a value that is a built-in graphic-string data type.
- length
- An integer constant that specifies the length attribute
for the resulting varying length character string. The value must
be between 1 and 1 073 741 823.
If the second argument is not specified or DEFAULT is specified:
- If the graphic-expression is the empty string constant, the length attribute of the result is 1.
- Otherwise, the length attribute of the result is the same as the length attribute of the first argument.
The actual length of the result is the minimum of the length attribute of the result and the actual length of graphic-expression. If the length of the graphic-expression is greater than the length attribute of the result, truncation is performed. A warning (SQLSTATE 01004) is returned unless the truncated characters were all blanks.
- integer
- An integer constant that specifies the CCSID for the
resulting varying-length graphic string. It must be a DBCS, UTF-16,
or UCS-2 CCSID. The CCSID cannot be 65535.
In the following rules, S denotes one of the following:
- If the string expression is a host variable containing data in a foreign encoding scheme, S is the result of the expression after converting the data to a CCSID in a native encoding scheme. (See Character conversion for more information.)
- If the string expression is data in a native encoding scheme, S is that string expression.
If the third argument is not specified, then the CCSID of the result is the same as the CCSID of the first argument.
Datetime to DBCLOB
- datetime-expression
- An expression that is one of the following three built-in data
types
- date
- The result is the varying-length graphic string representation of the date in the format specified by the second argument. If the second argument is not specified, the format used is the default date format. If the format is ISO, USA, EUR, or JIS, the length attribute and actual length of the result is 10. Otherwise the length attribute and actual length of the result is the length of the default date format. For more information see String representations of datetime values.
- time
- The result is the varying-length graphic string representation of the time in the format specified by the second argument. If the second argument is not specified, the format used is the default time format. The length attribute and actual length of the result is 8. For more information see String representations of datetime values.
- timestamp
- The second argument is not applicable and must not be specified.
The result is the varying-length graphic string representation of the timestamp. If datetime-expression is a TIMESTAMP(0), the length attribute and actual length of the result is 19. If the data type of datetime-expression is a TIMESTAMP(n), the length attribute and actual length of the result is 20+n. Otherwise, the length attribute and actual length of the result is 26.
- ISO, EUR, USA, or JIS
- Specifies the date or time format of the resulting graphic string. For more information, see String representations of datetime values.
- LOCAL
- Specifies that the date or time format of the resulting graphic string should come from the DATFMT, DATSEP, TIMFMT, and TIMSEP attributes of the job at the current server.
Note
Syntax alternatives: The CAST specification should be used to increase the portability of applications when the first argument is a string and the length attribute is specified. For more information, see CAST specification.
Example
- Using the EMPLOYEE table, set the host variable VAR_DESC (VARGRAPHIC(24))
to the DBCLOB equivalent of the first name (FIRSTNME) for employee
number (EMPNO) '000050'.
SELECT DBCLOB(VARGRAPHIC(FIRSTNME)) INTO :VAR_DESC FROM EMPLOYEE WHERE EMPNO = '000050'