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Add prokind column, replacing proisagg and proiswindow

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The new column distinguishes normal functions, procedures, aggregates,
and window functions.  This replaces the existing columns proisagg and
proiswindow, and replaces the convention that procedures are indicated
by prorettype == 0.  Also change prorettype to be VOIDOID for procedures.

Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>
Reviewed-by: Michael Paquier <michael@paquier.xyz>
This commit is contained in:
Peter Eisentraut
2018-03-02 08:57:38 -05:00
parent 1733460f02
commit fd1a421fe6
40 changed files with 3246 additions and 3174 deletions
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31
doc/src/sgml/catalogs.sgml
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@ -5062,15 +5062,17 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
</indexterm>
<para>
The catalog <structname>pg_proc</structname> stores information about functions (or procedures).
See <xref linkend="sql-createfunction"/>
and <xref linkend="xfunc"/> for more information.
The catalog <structname>pg_proc</structname> stores information about
functions, procedures, aggregate functions, and window functions
(collectively also known as routines). See <xref
linkend="sql-createfunction"/>, <xref linkend="sql-createprocedure"/>, and
<xref linkend="xfunc"/> for more information.
</para>
<para>
The table contains data for aggregate functions as well as plain functions.
If <structfield>proisagg</structfield> is true, there should be a matching
row in <structfield>pg_aggregate</structfield>.
If <structfield>prokind</structfield> indicates that the entry is for an
aggregate function, there should be a matching row in
<structfield>pg_aggregate</structfield>.
</para>
<table>
@ -5157,17 +5159,12 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
</row>
<row>
<entry><structfield>proisagg</structfield></entry>
<entry><type>bool</type></entry>
<entry><structfield>prokind</structfield></entry>
<entry><type>char</type></entry>
<entry></entry>
<entry>Function is an aggregate function</entry>
</row>
<row>
<entry><structfield>proiswindow</structfield></entry>
<entry><type>bool</type></entry>
<entry></entry>
<entry>Function is a window function</entry>
<entry><literal>f</literal> for a normal function, <literal>p</literal>
for a procedure, <literal>a</literal> for an aggregate function, or
<literal>w</literal> for a window function</entry>
</row>
<row>
@ -5264,7 +5261,7 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
<entry><structfield>prorettype</structfield></entry>
<entry><type>oid</type></entry>
<entry><literal><link linkend="catalog-pg-type"><structname>pg_type</structname></link>.oid</literal></entry>
<entry>Data type of the return value, or null for a procedure</entry>
<entry>Data type of the return value</entry>
</row>
<row>