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- bitnot(target_arg)
- DESCRIPTION:
Function performs a bitwise complement on the binary representation of the input argument.
The bitwise NOT, or complement, is a unary operation which performs logical negation on
each bit, forming the ones' complement of the specified binary value. The digits in the
argument which were 0 become 1, and vice versa.
PARAMETERS:
target_arg:
Required Argument.
Specifies a ColumnExpression of an integer or byte column or a numeric or byte
literal value.
If the argument is NULL, the function returns NULL.
Format of a ColumnExpression of a column: '<dataframe>.<dataframe_column>.expression'.
Supported SQL column types: BYTEINT, SMALLINT, INTEGER, BIGINT, and VARBYTE(n)
NOTE:
Function accepts positional arguments only.
EXAMPLES:
# Load the data to run the example.
>>> load_example_data("dataframe", "bytes_table")
>>>
# Create a DataFrame on 'bytes_table' table.
>>> bytes_table = DataFrame("bytes_table")
>>> bytes_table
byte_col varbyte_col blob_col
id_col
2 b'61' b'616263643132' b'6162636431323233'
1 b'62' b'62717765' b'3331363136323633'
0 b'63' b'627A7863' b'3330363136323633'
>>>
# Example performs a bitwise complement operation on "varbyte_col" column.
# Import func from sqlalchemy to execute bitnot function.
>>> from sqlalchemy import func
# Create a sqlalchemy Function object.
# Note: Function name case does not matter. We can use the function name in
# lower case, upper case or mixed case.
>>> bit_byte_func_ = func.BITNOT(bytes_table.varbyte_col.expression)
>>>
# Pass the Function object as input to DataFrame.assign().
>>> df = bytes_table.assign(bitnot_byte_=bit_byte_func_)
>>> print(df)
byte_col varbyte_col blob_col bitnot_byte_
id_col
2 b'61' b'616263643132' b'6162636431323233' b'-616263643133'
1 b'62' b'62717765' b'3331363136323633' b'-62717766'
0 b'63' b'627A7863' b'3330363136323633' b'-627A7864'
>>>
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