34 lines
1.4 KiB
Python
34 lines
1.4 KiB
Python
#------------------------------------------------------------------------------
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# Copyright 2017, Oracle and/or its affiliates. All rights reserved.
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# ReturnNumbersAsDecimals.py
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# Returns all numbers as decimals by means of an output type handler. This is
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# needed if the full decimal precision of Oracle numbers is required by the
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# application. See this article
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# (http://blog.reverberate.org/2016/02/06/floating-point-demystified-part2.html)
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# for an explanation of why decimal numbers (like Oracle numbers) cannot be
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# represented exactly by floating point numbers.
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#
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# This script requires cx_Oracle 5.0 and higher.
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#------------------------------------------------------------------------------
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from __future__ import print_function
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import cx_Oracle
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import decimal
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def OutputTypeHandler(cursor, name, defaultType, size, precision, scale):
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if defaultType == cx_Oracle.NUMBER:
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return cursor.var(str, size = 200, arraysize = cursor.arraysize,
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outconverter = decimal.Decimal)
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connection = cx_Oracle.Connection("cx_Oracle/dev@localhost/orcl")
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connection.outputtypehandler = OutputTypeHandler
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cursor = connection.cursor()
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cursor.execute("select * from TestNumbers")
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for row in cursor:
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print("Row:", row)
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