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Commite1089e3

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Add a compatibility note about plpgsql's treatment of SELECT INTO rec.fld
when fld is of composite type. Per discussion of bug #5644 from ValentineGogichashvili.
1 parent79b5481 commite1089e3

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‎doc/src/sgml/release-9.0.sgml

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<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.55 2010/09/01 15:14:42 tgl Exp $ -->
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<!-- $PostgreSQL: pgsql/doc/src/sgml/release-9.0.sgml,v 2.56 2010/09/15 17:45:57 tgl Exp $ -->
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<sect1 id="release-9-0">
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<title>Release 9.0</title>
@@ -434,6 +434,31 @@
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</para>
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</listitem>
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<listitem>
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<para>
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PL/pgSQL now treats selection into composite fields more consistently
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(Tom Lane)
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</para>
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<para>
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Formerly, a statement like
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<literal>SELECT ... INTO <replaceable>rec</>.<replaceable>fld</> FROM ...</literal>
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was treated as a scalar assignment even if the record field
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<replaceable>fld</> was of composite type. Now it is treated as a
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record assignment, the same as when the <literal>INTO</> target is a
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regular variable of composite type. So the values to be assigned to the
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field's subfields should be written as separate columns of the
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<command>SELECT</> list, not as a <literal>ROW(...)</> construct as in
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previous versions.
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</para>
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<para>
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If you need to do this in a way that will work in both 9.0 and previous
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releases, you can write something like
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<literal><replaceable>rec</>.<replaceable>fld</> := ROW(...) FROM ...</literal>.
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</para>
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</listitem>
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<listitem>
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<para>
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Remove PL/pgSQL's <literal>RENAME</> declaration (Tom Lane)

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