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Tags: upstream-8.4.0
Import upstream version 8.4.0

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src/backend/parser/parse_type.c
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 *
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 *
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 * IDENTIFICATION
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 *        $PostgreSQL: pgsql/src/backend/parser/parse_type.c,v 1.102 2009/01/01 17:23:46 momjian Exp $
 
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 *        $PostgreSQL: pgsql/src/backend/parser/parse_type.c,v 1.103 2009/06/11 14:49:00 momjian Exp $
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 *
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 *-------------------------------------------------------------------------
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 */
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                                                                  typioparam, atttypmod);
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#ifdef RANDOMIZE_ALLOCATED_MEMORY
 
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        /*
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         * For pass-by-reference data types, repeat the conversion to see if the
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         * input function leaves any uninitialized bytes in the result.  We can
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         * only detect that reliably if RANDOMIZE_ALLOCATED_MEMORY is enabled,
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         * so we don't bother testing otherwise.  The reason we don't want any
 
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         * only detect that reliably if RANDOMIZE_ALLOCATED_MEMORY is enabled, so
 
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         * we don't bother testing otherwise.  The reason we don't want any
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         * instability in the input function is that comparison of Const nodes
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         * relies on bytewise comparison of the datums, so if the input function
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         * leaves garbage then subexpressions that should be identical may not get
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         * recognized as such.  See pgsql-hackers discussion of 2008-04-04.
 
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         * recognized as such.  See pgsql-hackers discussion of 2008-04-04.
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         */
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        if (string && !typform->typbyval)
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        {