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Minor corrections to docs related to opclass options
Reported-by: Peter Geoghegan Discussion: https://postgr.es/m/CAH2-WzmwhYbxuoL0WjTLaiCxW3gj6qadeNpBhWAo_KZsE5-FGw%40mail.gmail.com
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@ -207,7 +207,7 @@
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<para>
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As shown in <xref linkend="xindex-btree-support-table"/>, btree defines
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one required and three optional support functions. The four
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one required and four optional support functions. The five
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user-defined methods are:
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</para>
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<variablelist>
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@ -284,7 +284,7 @@
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<para>
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There are five user-defined methods that an index operator class for
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<acronym>SP-GiST</acronym> must provide, and one is optional. All five
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<acronym>SP-GiST</acronym> must provide, and two are optional. All five
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mandatory methods follow the convention of accepting two <type>internal</type>
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arguments, the first of which is a pointer to a C struct containing input
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values for the support method, while the second argument is a pointer to a
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@ -295,7 +295,9 @@
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cases, the output struct is initialized to zeroes before calling the
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user-defined method. The optional sixth method <function>compress</function>
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accepts datum to be indexed as the only argument and returns a value suitable
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for physical storage in a leaf tuple.
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for physical storage in a leaf tuple. The optional seventh method
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<function>options</function> accepts internal pointer to a C struct, where
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opclass-specific parameters should be placed, and returns <type>void</type>.
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</para>
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<para>
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