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doc: Update uses of the word "procedure"
Historically, the term procedure was used as a synonym for function in Postgres/PostgreSQL. Now we have procedures as separate objects from functions, so we need to clean up the documentation to not mix those terms. In particular, mentions of "trigger procedures" are changed to "trigger functions", and access method "support procedures" are changed to "support functions". (The latter already used FUNCTION in the SQL syntax anyway.) Also, the terminology in the SPI chapter has been cleaned up. A few tests, examples, and code comments are also adjusted to be consistent with documentation changes, but not everything. Reported-by: Peter Geoghegan <pg@bowt.ie> Reviewed-by: Jonathan S. Katz <jonathan.katz@excoventures.com>
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@@ -38,7 +38,7 @@ CREATE OPERATOR CLASS <replaceable class="parameter">name</replaceable> [ DEFAUL
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An operator class defines how a particular data type can be used with
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an index. The operator class specifies that certain operators will fill
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particular roles or <quote>strategies</quote> for this data type and this
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index method. The operator class also specifies the support procedures to
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index method. The operator class also specifies the support functions to
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be used by
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the index method when the operator class is selected for an
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index column. All the operators and functions used by an operator
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@@ -201,7 +201,7 @@ CREATE OPERATOR CLASS <replaceable class="parameter">name</replaceable> [ DEFAUL
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<term><replaceable class="parameter">support_number</replaceable></term>
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<listitem>
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<para>
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The index method's support procedure number for a
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The index method's support function number for a
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function associated with the operator class.
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</para>
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</listitem>
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@@ -212,7 +212,7 @@ CREATE OPERATOR CLASS <replaceable class="parameter">name</replaceable> [ DEFAUL
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<listitem>
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<para>
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The name (optionally schema-qualified) of a function that is an
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index method support procedure for the operator class.
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index method support function for the operator class.
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</para>
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</listitem>
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</varlistentry>
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