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Update reference documentation on may/can/might:
Standard English uses "may", "can", and "might" in different ways: may - permission, "You may borrow my rake." can - ability, "I can lift that log." might - possibility, "It might rain today." Unfortunately, in conversational English, their use is often mixed, as in, "You may use this variable to do X", when in fact, "can" is a better choice. Similarly, "It may crash" is better stated, "It might crash".
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@@ -1,5 +1,5 @@
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<!--
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$PostgreSQL: pgsql/doc/src/sgml/ref/create_opclass.sgml,v 1.19 2007/01/23 05:07:17 tgl Exp $
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$PostgreSQL: pgsql/doc/src/sgml/ref/create_opclass.sgml,v 1.20 2007/01/31 23:26:03 momjian Exp $
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PostgreSQL documentation
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-->
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@@ -88,7 +88,7 @@ CREATE OPERATOR CLASS <replaceable class="parameter">name</replaceable> [ DEFAUL
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<term><replaceable class="parameter">name</replaceable></term>
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<listitem>
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<para>
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The name of the operator class to be created. The name may be
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The name of the operator class to be created. The name can be
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schema-qualified.
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</para>
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</listitem>
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@@ -161,7 +161,7 @@ CREATE OPERATOR CLASS <replaceable class="parameter">name</replaceable> [ DEFAUL
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In an <literal>OPERATOR</> clause,
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the operand data type(s) of the operator, or <literal>NONE</> to
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signify a left-unary or right-unary operator. The operand data
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types may be omitted in the normal case where they are the same
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types can be omitted in the normal case where they are the same
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as the operator class's data type.
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</para>
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@@ -236,7 +236,7 @@ CREATE OPERATOR CLASS <replaceable class="parameter">name</replaceable> [ DEFAUL
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<para>
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The <literal>OPERATOR</>, <literal>FUNCTION</>, and <literal>STORAGE</>
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clauses may appear in any order.
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clauses can appear in any order.
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</para>
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</refsect1>
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