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Support index INCLUDE in the AM properties interface.
This rectifies an oversight in commit 8224de4f4, by adding a new property 'can_include' for pg_indexam_has_property, and adjusting the results of pg_index_column_has_property to give more appropriate results for INCLUDEd columns.
This commit is contained in:
Andrew Gierth
parent
d234602c28
commit
49b0e300f7
@ -17555,6 +17555,12 @@ SELECT currval(pg_get_serial_sequence('sometable', 'id'));
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<entry>Does the access method support exclusion constraints?
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</entry>
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</row>
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<row>
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<entry><literal>can_include</literal></entry>
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<entry>Does the access method support the <literal>INCLUDE</literal>
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clause of <literal>CREATE INDEX</literal>?
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</entry>
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</row>
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</tbody>
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</tgroup>
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</table>
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@ -80,7 +80,10 @@ static const struct am_propname am_propnames[] =
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},
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{
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"can_exclude", AMPROP_CAN_EXCLUDE
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}
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},
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{
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"can_include", AMPROP_CAN_INCLUDE
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},
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};
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static IndexAMProperty
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@ -101,7 +104,8 @@ lookup_prop_name(const char *name)
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/*
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* Common code for properties that are just bit tests of indoptions.
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*
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* relid/attno: identify the index column to test the indoptions of.
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* tuple: the pg_index heaptuple
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* attno: identify the index column to test the indoptions of.
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* guard: if false, a boolean false result is forced (saves code in caller).
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* iopt_mask: mask for interesting indoption bit.
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* iopt_expect: value for a "true" result (should be 0 or iopt_mask).
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@ -110,12 +114,10 @@ lookup_prop_name(const char *name)
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* otherwise sets *res to the boolean value to return.
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*/
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static bool
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test_indoption(Oid relid, int attno, bool guard,
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test_indoption(HeapTuple tuple, int attno, bool guard,
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int16 iopt_mask, int16 iopt_expect,
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bool *res)
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{
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HeapTuple tuple;
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Form_pg_index rd_index PG_USED_FOR_ASSERTS_ONLY;
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Datum datum;
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bool isnull;
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int2vector *indoption;
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@ -127,14 +129,6 @@ test_indoption(Oid relid, int attno, bool guard,
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return true;
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}
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tuple = SearchSysCache1(INDEXRELID, ObjectIdGetDatum(relid));
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if (!HeapTupleIsValid(tuple))
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return false;
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rd_index = (Form_pg_index) GETSTRUCT(tuple);
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Assert(relid == rd_index->indexrelid);
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Assert(attno > 0 && attno <= rd_index->indnatts);
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datum = SysCacheGetAttr(INDEXRELID, tuple,
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Anum_pg_index_indoption, &isnull);
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Assert(!isnull);
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@ -144,8 +138,6 @@ test_indoption(Oid relid, int attno, bool guard,
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*res = (indoption_val & iopt_mask) == iopt_expect;
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ReleaseSysCache(tuple);
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return true;
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}
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@ -195,9 +187,10 @@ indexam_property(FunctionCallInfo fcinfo,
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}
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/*
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* At this point, either index_oid == InvalidOid or it's a valid index
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* OID. Also, after this test, either attno == 0 for index-wide or
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* AM-wide tests, or it's a valid column number in a valid index.
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* At this point, either index_oid == InvalidOid or it's a valid index OID.
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* Also, after this test and the one below, either attno == 0 for
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* index-wide or AM-wide tests, or it's a valid column number in a valid
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* index.
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*/
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if (attno < 0 || attno > natts)
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PG_RETURN_NULL();
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@ -224,80 +217,138 @@ indexam_property(FunctionCallInfo fcinfo,
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if (attno > 0)
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{
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/* Handle column-level properties */
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HeapTuple tuple;
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Form_pg_index rd_index;
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bool iskey = true;
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/*
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* Handle column-level properties. Many of these need the pg_index row
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* (which we also need to use to check for nonkey atts) so we fetch
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* that first.
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*/
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tuple = SearchSysCache1(INDEXRELID, ObjectIdGetDatum(index_oid));
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if (!HeapTupleIsValid(tuple))
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PG_RETURN_NULL();
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rd_index = (Form_pg_index) GETSTRUCT(tuple);
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Assert(index_oid == rd_index->indexrelid);
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Assert(attno > 0 && attno <= rd_index->indnatts);
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isnull = true;
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/*
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* If amcaninclude, we might be looking at an attno for a nonkey
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* column, for which we (generically) assume that most properties are
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* null.
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*/
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if (routine->amcaninclude
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&& attno > rd_index->indnkeyatts)
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iskey = false;
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switch (prop)
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{
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case AMPROP_ASC:
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if (test_indoption(index_oid, attno, routine->amcanorder,
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if (iskey &&
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test_indoption(tuple, attno, routine->amcanorder,
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INDOPTION_DESC, 0, &res))
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PG_RETURN_BOOL(res);
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PG_RETURN_NULL();
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isnull = false;
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break;
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case AMPROP_DESC:
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if (test_indoption(index_oid, attno, routine->amcanorder,
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if (iskey &&
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test_indoption(tuple, attno, routine->amcanorder,
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INDOPTION_DESC, INDOPTION_DESC, &res))
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PG_RETURN_BOOL(res);
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PG_RETURN_NULL();
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isnull = false;
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break;
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case AMPROP_NULLS_FIRST:
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if (test_indoption(index_oid, attno, routine->amcanorder,
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if (iskey &&
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test_indoption(tuple, attno, routine->amcanorder,
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INDOPTION_NULLS_FIRST, INDOPTION_NULLS_FIRST, &res))
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PG_RETURN_BOOL(res);
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PG_RETURN_NULL();
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isnull = false;
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break;
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case AMPROP_NULLS_LAST:
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if (test_indoption(index_oid, attno, routine->amcanorder,
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if (iskey &&
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test_indoption(tuple, attno, routine->amcanorder,
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INDOPTION_NULLS_FIRST, 0, &res))
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PG_RETURN_BOOL(res);
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PG_RETURN_NULL();
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isnull = false;
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break;
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case AMPROP_ORDERABLE:
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PG_RETURN_BOOL(routine->amcanorder);
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/*
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* generic assumption is that nonkey columns are not orderable
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*/
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res = iskey ? routine->amcanorder : false;
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isnull = false;
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break;
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case AMPROP_DISTANCE_ORDERABLE:
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/*
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* The conditions for whether a column is distance-orderable
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* are really up to the AM (at time of writing, only GiST
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* supports it at all). The planner has its own idea based on
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* supports it at all). The planner has its own idea based on
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* whether it finds an operator with amoppurpose 'o', but
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* getting there from just the index column type seems like a
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* lot of work. So instead we expect the AM to handle this in
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* its amproperty routine. The generic result is to return
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* false if the AM says it never supports this, and null
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* otherwise (meaning we don't know).
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* lot of work. So instead we expect the AM to handle this in
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* its amproperty routine. The generic result is to return
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* false if the AM says it never supports this, or if this is a
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* nonkey column, and null otherwise (meaning we don't know).
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*/
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if (!routine->amcanorderbyop)
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PG_RETURN_BOOL(false);
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PG_RETURN_NULL();
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if (!iskey || !routine->amcanorderbyop)
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{
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res = false;
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isnull = false;
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}
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break;
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case AMPROP_RETURNABLE:
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if (!routine->amcanreturn)
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PG_RETURN_BOOL(false);
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/*
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* If possible, the AM should handle this test in its
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* amproperty function without opening the rel. But this is
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* the generic fallback if it does not.
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*/
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/* note that we ignore iskey for this property */
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isnull = false;
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res = false;
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if (routine->amcanreturn)
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{
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/*
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* If possible, the AM should handle this test in its
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* amproperty function without opening the rel. But this is the
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* generic fallback if it does not.
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*/
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Relation indexrel = index_open(index_oid, AccessShareLock);
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res = index_can_return(indexrel, attno);
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index_close(indexrel, AccessShareLock);
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}
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PG_RETURN_BOOL(res);
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break;
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case AMPROP_SEARCH_ARRAY:
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PG_RETURN_BOOL(routine->amsearcharray);
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if (iskey)
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{
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res = routine->amsearcharray;
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isnull = false;
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}
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break;
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case AMPROP_SEARCH_NULLS:
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PG_RETURN_BOOL(routine->amsearchnulls);
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if (iskey)
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{
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res = routine->amsearchnulls;
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isnull = false;
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}
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break;
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default:
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PG_RETURN_NULL();
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break;
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}
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ReleaseSysCache(tuple);
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if (!isnull)
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PG_RETURN_BOOL(res);
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PG_RETURN_NULL();
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}
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if (OidIsValid(index_oid))
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@ -344,6 +395,9 @@ indexam_property(FunctionCallInfo fcinfo,
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case AMPROP_CAN_EXCLUDE:
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PG_RETURN_BOOL(routine->amgettuple ? true : false);
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case AMPROP_CAN_INCLUDE:
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PG_RETURN_BOOL(routine->amcaninclude);
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default:
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PG_RETURN_NULL();
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}
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@ -50,7 +50,8 @@ typedef enum IndexAMProperty
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AMPROP_CAN_ORDER, /* AM properties */
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AMPROP_CAN_UNIQUE,
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AMPROP_CAN_MULTI_COL,
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AMPROP_CAN_EXCLUDE
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AMPROP_CAN_EXCLUDE,
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AMPROP_CAN_INCLUDE
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} IndexAMProperty;
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@ -196,6 +197,12 @@ typedef struct IndexAmRoutine
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/* type of data stored in index, or InvalidOid if variable */
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Oid amkeytype;
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/*
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* If you add new properties to either the above or the below lists, then
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* they should also (usually) be exposed via the property API (see
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* IndexAMProperty at the top of the file, and utils/adt/amutils.c).
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*/
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/* interface functions */
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ambuild_function ambuild;
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ambuildempty_function ambuildempty;
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@ -12,7 +12,7 @@ select prop,
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'clusterable', 'index_scan', 'bitmap_scan',
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'backward_scan',
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'can_order', 'can_unique', 'can_multi_col',
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'can_exclude',
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'can_exclude', 'can_include',
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'bogus']::text[])
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with ordinality as u(prop,ord)
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where a.amname = 'btree'
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@ -36,8 +36,9 @@ select prop,
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can_unique | t | |
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can_multi_col | t | |
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can_exclude | t | |
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can_include | t | |
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bogus | | |
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(18 rows)
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(19 rows)
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select prop,
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pg_indexam_has_property(a.oid, prop) as "AM",
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@ -50,7 +51,7 @@ select prop,
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'clusterable', 'index_scan', 'bitmap_scan',
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'backward_scan',
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'can_order', 'can_unique', 'can_multi_col',
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'can_exclude',
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'can_exclude', 'can_include',
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'bogus']::text[])
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with ordinality as u(prop,ord)
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where a.amname = 'gist'
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@ -74,8 +75,9 @@ select prop,
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can_unique | f | |
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can_multi_col | t | |
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can_exclude | t | |
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can_include | f | |
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bogus | | |
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(18 rows)
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(19 rows)
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select prop,
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pg_index_column_has_property('onek_hundred'::regclass, 1, prop) as btree,
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@ -128,7 +130,7 @@ select prop,
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select amname, prop, pg_indexam_has_property(a.oid, prop) as p
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from pg_am a,
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unnest(array['can_order', 'can_unique', 'can_multi_col',
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'can_exclude', 'bogus']::text[])
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'can_exclude', 'can_include', 'bogus']::text[])
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with ordinality as u(prop,ord)
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where amtype = 'i'
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order by amname, ord;
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@ -138,33 +140,39 @@ select amname, prop, pg_indexam_has_property(a.oid, prop) as p
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brin | can_unique | f
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brin | can_multi_col | t
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brin | can_exclude | f
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brin | can_include | f
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brin | bogus |
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btree | can_order | t
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btree | can_unique | t
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btree | can_multi_col | t
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btree | can_exclude | t
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btree | can_include | t
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btree | bogus |
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gin | can_order | f
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gin | can_unique | f
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gin | can_multi_col | t
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gin | can_exclude | f
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gin | can_include | f
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gin | bogus |
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gist | can_order | f
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gist | can_unique | f
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gist | can_multi_col | t
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gist | can_exclude | t
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gist | can_include | f
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gist | bogus |
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hash | can_order | f
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hash | can_unique | f
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hash | can_multi_col | f
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hash | can_exclude | t
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hash | can_include | f
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hash | bogus |
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spgist | can_order | f
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spgist | can_unique | f
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spgist | can_multi_col | f
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spgist | can_exclude | t
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spgist | can_include | f
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spgist | bogus |
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(30 rows)
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(36 rows)
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--
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-- additional checks for pg_index_column_has_property
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@ -206,3 +214,40 @@ select col, prop, pg_index_column_has_property(o, col, prop)
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4 | bogus |
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(24 rows)
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CREATE INDEX foocover ON foo (f1) INCLUDE (f2,f3);
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select col, prop, pg_index_column_has_property(o, col, prop)
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from (values ('foocover'::regclass)) v1(o),
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(values (1,'orderable'),(2,'asc'),(3,'desc'),
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(4,'nulls_first'),(5,'nulls_last'),
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(6,'distance_orderable'),(7,'returnable'),
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(8, 'bogus')) v2(idx,prop),
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generate_series(1,3) col
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order by col, idx;
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col | prop | pg_index_column_has_property
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-----+--------------------+------------------------------
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1 | orderable | t
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1 | asc | t
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1 | desc | f
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1 | nulls_first | f
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1 | nulls_last | t
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1 | distance_orderable | f
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1 | returnable | t
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1 | bogus |
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2 | orderable | f
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2 | asc |
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2 | desc |
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2 | nulls_first |
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2 | nulls_last |
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2 | distance_orderable | f
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2 | returnable | t
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2 | bogus |
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3 | orderable | f
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3 | asc |
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3 | desc |
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3 | nulls_first |
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3 | nulls_last |
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3 | distance_orderable | f
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3 | returnable | t
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3 | bogus |
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(24 rows)
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@ -13,7 +13,7 @@ select prop,
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'clusterable', 'index_scan', 'bitmap_scan',
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'backward_scan',
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'can_order', 'can_unique', 'can_multi_col',
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'can_exclude',
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'can_exclude', 'can_include',
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'bogus']::text[])
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with ordinality as u(prop,ord)
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where a.amname = 'btree'
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@ -30,7 +30,7 @@ select prop,
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'clusterable', 'index_scan', 'bitmap_scan',
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'backward_scan',
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'can_order', 'can_unique', 'can_multi_col',
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'can_exclude',
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'can_exclude', 'can_include',
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'bogus']::text[])
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with ordinality as u(prop,ord)
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where a.amname = 'gist'
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@ -66,7 +66,7 @@ select prop,
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select amname, prop, pg_indexam_has_property(a.oid, prop) as p
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from pg_am a,
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unnest(array['can_order', 'can_unique', 'can_multi_col',
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'can_exclude', 'bogus']::text[])
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'can_exclude', 'can_include', 'bogus']::text[])
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with ordinality as u(prop,ord)
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where amtype = 'i'
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order by amname, ord;
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@ -85,3 +85,14 @@ select col, prop, pg_index_column_has_property(o, col, prop)
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(6, 'bogus')) v2(idx,prop),
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generate_series(1,4) col
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order by col, idx;
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CREATE INDEX foocover ON foo (f1) INCLUDE (f2,f3);
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select col, prop, pg_index_column_has_property(o, col, prop)
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from (values ('foocover'::regclass)) v1(o),
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(values (1,'orderable'),(2,'asc'),(3,'desc'),
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(4,'nulls_first'),(5,'nulls_last'),
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(6,'distance_orderable'),(7,'returnable'),
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(8, 'bogus')) v2(idx,prop),
|
||||
generate_series(1,3) col
|
||||
order by col, idx;
|
||||
|
||||
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Reference in New Issue
Block a user