31 lines
1.3 KiB
Python
31 lines
1.3 KiB
Python
#------------------------------------------------------------------------------
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# Copyright (c) 2017, 2020, 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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import cx_Oracle
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import decimal
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import sample_env
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def output_type_handler(cursor, name, defaultType, size, precision, scale):
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if defaultType == cx_Oracle.NUMBER:
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return cursor.var(decimal.Decimal, arraysize = cursor.arraysize)
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connection = cx_Oracle.connect(sample_env.get_main_connect_string())
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connection.outputtypehandler = output_type_handler
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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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