[ , SSPACE = <replaceable class="parameter">state_data_size</replaceable> ]
[ , FINALFUNC = <replaceable class="parameter">ffunc</replaceable> ]
[ , FINALFUNC_EXTRA ]
- [ , FINALFUNC_MODIFY = { READ_ONLY | SHARABLE | READ_WRITE } ]
+ [ , FINALFUNC_MODIFY = { READ_ONLY | SHAREABLE | READ_WRITE } ]
[ , COMBINEFUNC = <replaceable class="parameter">combinefunc</replaceable> ]
[ , SERIALFUNC = <replaceable class="parameter">serialfunc</replaceable> ]
[ , DESERIALFUNC = <replaceable class="parameter">deserialfunc</replaceable> ]
[ , MSSPACE = <replaceable class="parameter">mstate_data_size</replaceable> ]
[ , MFINALFUNC = <replaceable class="parameter">mffunc</replaceable> ]
[ , MFINALFUNC_EXTRA ]
- [ , MFINALFUNC_MODIFY = { READ_ONLY | SHARABLE | READ_WRITE } ]
+ [ , MFINALFUNC_MODIFY = { READ_ONLY | SHAREABLE | READ_WRITE } ]
[ , MINITCOND = <replaceable class="parameter">minitial_condition</replaceable> ]
[ , SORTOP = <replaceable class="parameter">sort_operator</replaceable> ]
[ , PARALLEL = { SAFE | RESTRICTED | UNSAFE } ]
[ , SSPACE = <replaceable class="parameter">state_data_size</replaceable> ]
[ , FINALFUNC = <replaceable class="parameter">ffunc</replaceable> ]
[ , FINALFUNC_EXTRA ]
- [ , FINALFUNC_MODIFY = { READ_ONLY | SHARABLE | READ_WRITE } ]
+ [ , FINALFUNC_MODIFY = { READ_ONLY | SHAREABLE | READ_WRITE } ]
[ , INITCOND = <replaceable class="parameter">initial_condition</replaceable> ]
[ , PARALLEL = { SAFE | RESTRICTED | UNSAFE } ]
[ , HYPOTHETICAL ]
[ , SSPACE = <replaceable class="parameter">state_data_size</replaceable> ]
[ , FINALFUNC = <replaceable class="parameter">ffunc</replaceable> ]
[ , FINALFUNC_EXTRA ]
- [ , FINALFUNC_MODIFY = { READ_ONLY | SHARABLE | READ_WRITE } ]
+ [ , FINALFUNC_MODIFY = { READ_ONLY | SHAREABLE | READ_WRITE } ]
[ , COMBINEFUNC = <replaceable class="parameter">combinefunc</replaceable> ]
[ , SERIALFUNC = <replaceable class="parameter">serialfunc</replaceable> ]
[ , DESERIALFUNC = <replaceable class="parameter">deserialfunc</replaceable> ]
[ , MSSPACE = <replaceable class="parameter">mstate_data_size</replaceable> ]
[ , MFINALFUNC = <replaceable class="parameter">mffunc</replaceable> ]
[ , MFINALFUNC_EXTRA ]
- [ , MFINALFUNC_MODIFY = { READ_ONLY | SHARABLE | READ_WRITE } ]
+ [ , MFINALFUNC_MODIFY = { READ_ONLY | SHAREABLE | READ_WRITE } ]
[ , MINITCOND = <replaceable class="parameter">minitial_condition</replaceable> ]
[ , SORTOP = <replaceable class="parameter">sort_operator</replaceable> ]
)
</varlistentry>
<varlistentry>
- <term><literal>FINALFUNC_MODIFY</literal> = { <literal>READ_ONLY</literal> | <literal>SHARABLE</literal> | <literal>READ_WRITE</literal> }</term>
+ <term><literal>FINALFUNC_MODIFY</literal> = { <literal>READ_ONLY</literal> | <literal>SHAREABLE</literal> | <literal>READ_WRITE</literal> }</term>
<listitem>
<para>
This option specifies whether the final function is a pure function
</varlistentry>
<varlistentry>
- <term><literal>MFINALFUNC_MODIFY</literal> = { <literal>READ_ONLY</literal> | <literal>SHARABLE</literal> | <literal>READ_WRITE</literal> }</term>
+ <term><literal>MFINALFUNC_MODIFY</literal> = { <literal>READ_ONLY</literal> | <literal>SHAREABLE</literal> | <literal>READ_WRITE</literal> }</term>
<listitem>
<para>
This option is like <literal>FINALFUNC_MODIFY</literal>, but it describes
Likewise, while an aggregate final function is normally expected not to
modify its input values, sometimes it is impractical to avoid modifying
the transition-state argument. Such behavior must be declared using
- the <literal>FINALFUNC_MODIFY</literal> parameter. The <literal>READ_WRITE</literal>
+ the <literal>FINALFUNC_MODIFY</literal> parameter.
+ The <literal>READ_WRITE</literal>
value indicates that the final function modifies the transition state in
unspecified ways. This value prevents use of the aggregate as a window
function, and it also prevents merging of transition states for aggregate
calls that share the same input values and transition functions.
- The <literal>SHARABLE</literal> value indicates that the transition function
+ The <literal>SHAREABLE</literal> value indicates that the transition function
cannot be applied after the final function, but multiple final-function
calls can be performed on the ending transition state value. This value
prevents use of the aggregate as a window function, but it allows merging
to continue adding input rows by executing the transition function again
later. This means the final function is not <literal>READ_ONLY</literal>;
it must be declared in <xref linkend="sql-createaggregate"/>
- as <literal>READ_WRITE</literal>, or as <literal>SHARABLE</literal> if it's
- possible for additional final-function calls to make use of the
+ as <literal>READ_WRITE</literal>, or as <literal>SHAREABLE</literal> if
+ it's possible for additional final-function calls to make use of the
already-sorted state.
</para>
if (strcmp(val, "read_only") == 0)
return AGGMODIFY_READ_ONLY;
- if (strcmp(val, "sharable") == 0)
- return AGGMODIFY_SHARABLE;
+ if (strcmp(val, "shareable") == 0)
+ return AGGMODIFY_SHAREABLE;
if (strcmp(val, "read_write") == 0)
return AGGMODIFY_READ_WRITE;
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
- errmsg("parameter \"%s\" must be READ_ONLY, SHARABLE, or READ_WRITE",
+ errmsg("parameter \"%s\" must be READ_ONLY, SHAREABLE, or READ_WRITE",
defel->defname)));
return 0; /* keep compiler quiet */
}
static int find_compatible_peragg(Aggref *newagg, AggState *aggstate,
int lastaggno, List **same_input_transnos);
static int find_compatible_pertrans(AggState *aggstate, Aggref *newagg,
- bool sharable,
+ bool shareable,
Oid aggtransfn, Oid aggtranstype,
Oid aggserialfn, Oid aggdeserialfn,
Datum initValue, bool initValueIsNull,
AclResult aclresult;
Oid transfn_oid,
finalfn_oid;
- bool sharable;
+ bool shareable;
Oid serialfn_oid,
deserialfn_oid;
Expr *finalfnexpr;
/*
* If finalfn is marked read-write, we can't share transition states;
- * but it is okay to share states for AGGMODIFY_SHARABLE aggs. Also,
+ * but it is okay to share states for AGGMODIFY_SHAREABLE aggs. Also,
* if we're not executing the finalfn here, we can share regardless.
*/
- sharable = (aggform->aggfinalmodify != AGGMODIFY_READ_WRITE) ||
+ shareable = (aggform->aggfinalmodify != AGGMODIFY_READ_WRITE) ||
(finalfn_oid == InvalidOid);
- peragg->sharable = sharable;
+ peragg->shareable = shareable;
serialfn_oid = InvalidOid;
deserialfn_oid = InvalidOid;
* 2. Build working state for invoking the transition function, or
* look up previously initialized working state, if we can share it.
*
- * find_compatible_peragg() already collected a list of sharable
+ * find_compatible_peragg() already collected a list of shareable
* per-Trans's with the same inputs. Check if any of them have the
* same transition function and initial value.
*/
existing_transno = find_compatible_pertrans(aggstate, aggref,
- sharable,
+ shareable,
transfn_oid, aggtranstype,
serialfn_oid, deserialfn_oid,
initValue, initValueIsNull,
* with this one, with the same input parameters. If no compatible aggregate
* can be found, returns -1.
*
- * As a side-effect, this also collects a list of existing, sharable per-Trans
+ * As a side-effect, this also collects a list of existing, shareable per-Trans
* structs with matching inputs. If no identical Aggref is found, the list is
* passed later to find_compatible_pertrans, to see if we can at least reuse
* the state value of another aggregate.
* we might report a transno more than once. find_compatible_pertrans
* is cheap enough that it's not worth spending cycles to avoid that.)
*/
- if (peragg->sharable)
+ if (peragg->shareable)
*same_input_transnos = lappend_int(*same_input_transnos,
peragg->transno);
}
* verified to match.)
*/
static int
-find_compatible_pertrans(AggState *aggstate, Aggref *newagg, bool sharable,
+find_compatible_pertrans(AggState *aggstate, Aggref *newagg, bool shareable,
Oid aggtransfn, Oid aggtranstype,
Oid aggserialfn, Oid aggdeserialfn,
Datum initValue, bool initValueIsNull,
ListCell *lc;
/* If this aggregate can't share transition states, give up */
- if (!sharable)
+ if (!shareable)
return -1;
foreach(lc, transnos)
case AGGMODIFY_READ_ONLY:
appendPQExpBufferStr(details, ",\n FINALFUNC_MODIFY = READ_ONLY");
break;
- case AGGMODIFY_SHARABLE:
- appendPQExpBufferStr(details, ",\n FINALFUNC_MODIFY = SHARABLE");
+ case AGGMODIFY_SHAREABLE:
+ appendPQExpBufferStr(details, ",\n FINALFUNC_MODIFY = SHAREABLE");
break;
case AGGMODIFY_READ_WRITE:
appendPQExpBufferStr(details, ",\n FINALFUNC_MODIFY = READ_WRITE");
case AGGMODIFY_READ_ONLY:
appendPQExpBufferStr(details, ",\n MFINALFUNC_MODIFY = READ_ONLY");
break;
- case AGGMODIFY_SHARABLE:
- appendPQExpBufferStr(details, ",\n MFINALFUNC_MODIFY = SHARABLE");
+ case AGGMODIFY_SHAREABLE:
+ appendPQExpBufferStr(details, ",\n MFINALFUNC_MODIFY = SHAREABLE");
break;
case AGGMODIFY_READ_WRITE:
appendPQExpBufferStr(details, ",\n MFINALFUNC_MODIFY = READ_WRITE");
basetype = int4,
stype = _int8,
finalfunc = int8_avg,
- finalfunc_modify = sharable,
+ finalfunc_modify = shareable,
initcond1 = \'{0,0}\'
);',
regexp => qr/^
\n\s+\QSTYPE = bigint[],\E
\n\s+\QINITCOND = '{0,0}',\E
\n\s+\QFINALFUNC = int8_avg,\E
- \n\s+\QFINALFUNC_MODIFY = SHARABLE\E
+ \n\s+\QFINALFUNC_MODIFY = SHAREABLE\E
\n\);/xm,
like => {
%full_runs,
* transfn cannot be applied anymore after the first finalfn call.
*/
#define AGGMODIFY_READ_ONLY 'r'
-#define AGGMODIFY_SHARABLE 's'
+#define AGGMODIFY_SHAREABLE 's'
#define AGGMODIFY_READ_WRITE 'w'
#endif /* EXPOSE_TO_CLIENT_CODE */
bool resulttypeByVal;
/*
- * "sharable" is false if this agg cannot share state values with other
+ * "shareable" is false if this agg cannot share state values with other
* aggregates because the final function is read-write.
*/
- bool sharable;
+ bool shareable;
} AggStatePerAggData;
/*
serialfunc = numeric_avg_serialize,
deserialfunc = numeric_avg_deserialize,
combinefunc = numeric_avg_combine,
- finalfunc_modify = sharable -- just to test a non-default setting
+ finalfunc_modify = shareable -- just to test a non-default setting
);
-- Ensure all these functions made it into the catalog
SELECT aggfnoid, aggtransfn, aggcombinefn, aggtranstype::regtype,
serialfunc = numeric_avg_serialize,
deserialfunc = numeric_avg_deserialize,
combinefunc = numeric_avg_combine,
- finalfunc_modify = sharable -- just to test a non-default setting
+ finalfunc_modify = shareable -- just to test a non-default setting
);
-- Ensure all these functions made it into the catalog