74d9d71484
tests. Although the two are aliases of one another, it makes sense to be consistent and to use the one that the DB API prefers as well.
52 lines
1.8 KiB
Python
52 lines
1.8 KiB
Python
#------------------------------------------------------------------------------
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# Copyright (c) 2016, 2018, Oracle and/or its affiliates. All rights reserved.
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#------------------------------------------------------------------------------
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#------------------------------------------------------------------------------
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# ArrayDMLRowCounts.py
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#
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# Demonstrate the use of the 12.1 feature that allows cursor.executemany()
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# to return the number of rows affected by each individual execution as a list.
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# The parameter "arraydmlrowcounts" must be set to True in the call to
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# cursor.executemany() after which cursor.getarraydmlrowcounts() can be called.
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#
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# This script requires cx_Oracle 5.2 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 SampleEnv
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connection = cx_Oracle.connect(SampleEnv.MAIN_CONNECT_STRING)
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cursor = connection.cursor()
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# show the number of rows for each parent ID as a means of verifying the
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# output from the delete statement
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for parentId, count in cursor.execute("""
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select ParentId, count(*)
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from ChildTable
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group by ParentId
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order by ParentId"""):
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print("Parent ID:", parentId, "has", int(count), "rows.")
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print()
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# delete the following parent IDs only
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parentIdsToDelete = [20, 30, 50]
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print("Deleting Parent IDs:", parentIdsToDelete)
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print()
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# enable array DML row counts for each iteration executed in executemany()
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cursor.executemany("""
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delete from ChildTable
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where ParentId = :1""",
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[(i,) for i in parentIdsToDelete],
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arraydmlrowcounts = True)
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# display the number of rows deleted for each parent ID
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rowCounts = cursor.getarraydmlrowcounts()
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for parentId, count in zip(parentIdsToDelete, rowCounts):
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print("Parent ID:", parentId, "deleted", count, "rows.")
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