greenplumn brin_inclusion 源码
greenplumn brin_inclusion 代码
文件路径：/src/backend/access/brin/brin_inclusion.c
/*
* brin_inclusion.c
* Implementation of inclusion opclasses for BRIN
*
* This module provides framework BRIN support functions for the "inclusion"
* operator classes. A few SQL-level support functions are also required for
* each opclass.
*
* The "inclusion" BRIN strategy is useful for types that support R-Tree
* operations. This implementation is a straight mapping of those operations
* to the block-range nature of BRIN, with two exceptions: (a) we explicitly
* support "empty" elements: at least with range types, we need to consider
* emptiness separately from regular R-Tree strategies; and (b) we need to
* consider "unmergeable" elements, that is, a set of elements for whose union
* no representation exists. The only case where that happens as of this
* writing is the INET type, where IPv6 values cannot be merged with IPv4
* values.
*
* Portions Copyright (c) 1996-2019, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* IDENTIFICATION
* src/backend/access/brin/brin_inclusion.c
*/
#include "postgres.h"
#include "access/brin_internal.h"
#include "access/brin_tuple.h"
#include "access/genam.h"
#include "access/skey.h"
#include "catalog/pg_amop.h"
#include "catalog/pg_type.h"
#include "utils/builtins.h"
#include "utils/datum.h"
#include "utils/lsyscache.h"
#include "utils/rel.h"
#include "utils/syscache.h"
/*
* Additional SQL level support functions
*
* Procedure numbers must not use values reserved for BRIN itself; see
* brin_internal.h.
*/
#define INCLUSION_MAX_PROCNUMS 4 /* maximum support procs we need */
#define PROCNUM_MERGE 11 /* required */
#define PROCNUM_MERGEABLE 12 /* optional */
#define PROCNUM_CONTAINS 13 /* optional */
#define PROCNUM_EMPTY 14 /* optional */
/*
* Subtract this from procnum to obtain index in InclusionOpaque arrays
* (Must be equal to minimum of private procnums).
*/
#define PROCNUM_BASE 11
/*-
* The values stored in the bv_values arrays correspond to:
*
* INCLUSION_UNION
* the union of the values in the block range
* INCLUSION_UNMERGEABLE
* whether the values in the block range cannot be merged
* (e.g. an IPv6 address amidst IPv4 addresses)
* INCLUSION_CONTAINS_EMPTY
* whether an empty value is present in any tuple
* in the block range
*/
#define INCLUSION_UNION 0
#define INCLUSION_UNMERGEABLE 1
#define INCLUSION_CONTAINS_EMPTY 2
typedef struct InclusionOpaque
{
FmgrInfo extra_procinfos[INCLUSION_MAX_PROCNUMS];
bool extra_proc_missing[INCLUSION_MAX_PROCNUMS];
Oid cached_subtype;
FmgrInfo strategy_procinfos[RTMaxStrategyNumber];
} InclusionOpaque;
static FmgrInfo *inclusion_get_procinfo(BrinDesc *bdesc, uint16 attno,
uint16 procnum);
static FmgrInfo *inclusion_get_strategy_procinfo(BrinDesc *bdesc, uint16 attno,
Oid subtype, uint16 strategynum);
/*
* BRIN inclusion OpcInfo function
*/
Datum
brin_inclusion_opcinfo(PG_FUNCTION_ARGS)
{
Oid typoid = PG_GETARG_OID(0);
BrinOpcInfo *result;
TypeCacheEntry *bool_typcache = lookup_type_cache(BOOLOID, 0);
/*
* All members of opaque are initialized lazily; both procinfo arrays
* start out as non-initialized by having fn_oid be InvalidOid, and
* "missing" to false, by zeroing here. strategy_procinfos elements can
* be invalidated when cached_subtype changes by zeroing fn_oid.
* extra_procinfo entries are never invalidated, but if a lookup fails
* (which is expected), extra_proc_missing is set to true, indicating not
* to look it up again.
*/
result = palloc0(MAXALIGN(SizeofBrinOpcInfo(3)) + sizeof(InclusionOpaque));
result->oi_nstored = 3;
result->oi_opaque = (InclusionOpaque *)
MAXALIGN((char *) result + SizeofBrinOpcInfo(3));
/* the union */
result->oi_typcache[INCLUSION_UNION] =
lookup_type_cache(typoid, 0);
/* includes elements that are not mergeable */
result->oi_typcache[INCLUSION_UNMERGEABLE] = bool_typcache;
/* includes the empty element */
result->oi_typcache[INCLUSION_CONTAINS_EMPTY] = bool_typcache;
PG_RETURN_POINTER(result);
}
/*
* BRIN inclusion add value function
*
* Examine the given index tuple (which contains partial status of a certain
* page range) by comparing it to the given value that comes from another heap
* tuple. If the new value is outside the union specified by the existing
* tuple values, update the index tuple and return true. Otherwise, return
* false and do not modify in this case.
*/
Datum
brin_inclusion_add_value(PG_FUNCTION_ARGS)
{
BrinDesc *bdesc = (BrinDesc *) PG_GETARG_POINTER(0);
BrinValues *column = (BrinValues *) PG_GETARG_POINTER(1);
Datum newval = PG_GETARG_DATUM(2);
bool isnull = PG_GETARG_BOOL(3);
Oid colloid = PG_GET_COLLATION();
FmgrInfo *finfo;
Datum result;
bool new = false;
AttrNumber attno;
Form_pg_attribute attr;
/*
* If the new value is null, we record that we saw it if it's the first
* one; otherwise, there's nothing to do.
*/
if (isnull)
{
if (column->bv_hasnulls)
PG_RETURN_BOOL(false);
column->bv_hasnulls = true;
PG_RETURN_BOOL(true);
}
attno = column->bv_attno;
attr = TupleDescAttr(bdesc->bd_tupdesc, attno - 1);
/*
* If the recorded value is null, copy the new value (which we know to be
* not null), and we're almost done.
*/
if (column->bv_allnulls)
{
column->bv_values[INCLUSION_UNION] =
datumCopy(newval, attr->attbyval, attr->attlen);
column->bv_values[INCLUSION_UNMERGEABLE] = BoolGetDatum(false);
column->bv_values[INCLUSION_CONTAINS_EMPTY] = BoolGetDatum(false);
column->bv_allnulls = false;
new = true;
}
/*
* No need for further processing if the block range is marked as
* containing unmergeable values.
*/
if (DatumGetBool(column->bv_values[INCLUSION_UNMERGEABLE]))
PG_RETURN_BOOL(false);
/*
* If the opclass supports the concept of empty values, test the passed
* new value for emptiness; if it returns true, we need to set the
* "contains empty" flag in the element (unless already set).
*/
finfo = inclusion_get_procinfo(bdesc, attno, PROCNUM_EMPTY);
if (finfo != NULL && DatumGetBool(FunctionCall1Coll(finfo, colloid, newval)))
{
if (!DatumGetBool(column->bv_values[INCLUSION_CONTAINS_EMPTY]))
{
column->bv_values[INCLUSION_CONTAINS_EMPTY] = BoolGetDatum(true);
PG_RETURN_BOOL(true);
}
PG_RETURN_BOOL(false);
}
if (new)
PG_RETURN_BOOL(true);
/* Check if the new value is already contained. */
finfo = inclusion_get_procinfo(bdesc, attno, PROCNUM_CONTAINS);
if (finfo != NULL &&
DatumGetBool(FunctionCall2Coll(finfo, colloid,
column->bv_values[INCLUSION_UNION],
newval)))
PG_RETURN_BOOL(false);
/*
* Check if the new value is mergeable to the existing union. If it is
* not, mark the value as containing unmergeable elements and get out.
*
* Note: at this point we could remove the value from the union, since
* it's not going to be used any longer. However, the BRIN framework
* doesn't allow for the value not being present. Improve someday.
*/
finfo = inclusion_get_procinfo(bdesc, attno, PROCNUM_MERGEABLE);
if (finfo != NULL &&
!DatumGetBool(FunctionCall2Coll(finfo, colloid,
column->bv_values[INCLUSION_UNION],
newval)))
{
column->bv_values[INCLUSION_UNMERGEABLE] = BoolGetDatum(true);
PG_RETURN_BOOL(true);
}
/* Finally, merge the new value to the existing union. */
finfo = inclusion_get_procinfo(bdesc, attno, PROCNUM_MERGE);
Assert(finfo != NULL);
result = FunctionCall2Coll(finfo, colloid,
column->bv_values[INCLUSION_UNION], newval);
if (!attr->attbyval)
pfree(DatumGetPointer(column->bv_values[INCLUSION_UNION]));
column->bv_values[INCLUSION_UNION] = result;
PG_RETURN_BOOL(true);
}
/*
* BRIN inclusion consistent function
*
* All of the strategies are optional.
*/
Datum
brin_inclusion_consistent(PG_FUNCTION_ARGS)
{
BrinDesc *bdesc = (BrinDesc *) PG_GETARG_POINTER(0);
BrinValues *column = (BrinValues *) PG_GETARG_POINTER(1);
ScanKey key = (ScanKey) PG_GETARG_POINTER(2);
Oid colloid = PG_GET_COLLATION(),
subtype;
Datum unionval;
AttrNumber attno;
Datum query;
FmgrInfo *finfo;
Datum result;
Assert(key->sk_attno == column->bv_attno);
/* Handle IS NULL/IS NOT NULL tests. */
if (key->sk_flags & SK_ISNULL)
{
if (key->sk_flags & SK_SEARCHNULL)
{
if (column->bv_allnulls || column->bv_hasnulls)
PG_RETURN_BOOL(true);
PG_RETURN_BOOL(false);
}
/*
* For IS NOT NULL, we can only skip ranges that are known to have
* only nulls.
*/
if (key->sk_flags & SK_SEARCHNOTNULL)
PG_RETURN_BOOL(!column->bv_allnulls);
/*
* Neither IS NULL nor IS NOT NULL was used; assume all indexable
* operators are strict and return false.
*/
PG_RETURN_BOOL(false);
}
/* If it is all nulls, it cannot possibly be consistent. */
if (column->bv_allnulls)
PG_RETURN_BOOL(false);
/* It has to be checked, if it contains elements that are not mergeable. */
if (DatumGetBool(column->bv_values[INCLUSION_UNMERGEABLE]))
PG_RETURN_BOOL(true);
attno = key->sk_attno;
subtype = key->sk_subtype;
query = key->sk_argument;
unionval = column->bv_values[INCLUSION_UNION];
switch (key->sk_strategy)
{
/*
* Placement strategies
*
* These are implemented by logically negating the result of the
* converse placement operator; for this to work, the converse
* operator must be part of the opclass. An error will be thrown
* by inclusion_get_strategy_procinfo() if the required strategy
* is not part of the opclass.
*
* These all return false if either argument is empty, so there is
* no need to check for empty elements.
*/
case RTLeftStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTOverRightStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
case RTOverLeftStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTRightStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
case RTOverRightStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTLeftStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
case RTRightStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTOverLeftStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
case RTBelowStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTOverAboveStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
case RTOverBelowStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTAboveStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
case RTOverAboveStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTBelowStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
case RTAboveStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTOverBelowStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
/*
* Overlap and contains strategies
*
* These strategies are simple enough that we can simply call the
* operator and return its result. Empty elements don't change
* the result.
*/
case RTOverlapStrategyNumber:
case RTContainsStrategyNumber:
case RTOldContainsStrategyNumber:
case RTContainsElemStrategyNumber:
case RTSubStrategyNumber:
case RTSubEqualStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
key->sk_strategy);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_DATUM(result);
/*
* Contained by strategies
*
* We cannot just call the original operator for the contained by
* strategies because some elements can be contained even though
* the union is not; instead we use the overlap operator.
*
* We check for empty elements separately as they are not merged
* to the union but contained by everything.
*/
case RTContainedByStrategyNumber:
case RTOldContainedByStrategyNumber:
case RTSuperStrategyNumber:
case RTSuperEqualStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTOverlapStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
if (DatumGetBool(result))
PG_RETURN_BOOL(true);
PG_RETURN_DATUM(column->bv_values[INCLUSION_CONTAINS_EMPTY]);
/*
* Adjacent strategy
*
* We test for overlap first but to be safe we need to call the
* actual adjacent operator also.
*
* An empty element cannot be adjacent to any other, so there is
* no need to check for it.
*/
case RTAdjacentStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTOverlapStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
if (DatumGetBool(result))
PG_RETURN_BOOL(true);
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTAdjacentStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_DATUM(result);
/*
* Basic comparison strategies
*
* It is straightforward to support the equality strategies with
* the contains operator. Generally, inequality strategies do not
* make much sense for the types which will be used with the
* inclusion BRIN family of opclasses, but it is possible to
* implement them with logical negation of the left-of and
* right-of operators.
*
* NB: These strategies cannot be used with geometric datatypes
* that use comparison of areas! The only exception is the "same"
* strategy.
*
* Empty elements are considered to be less than the others. We
* cannot use the empty support function to check the query is an
* empty element, because the query can be another data type than
* the empty support function argument. So we will return true,
* if there is a possibility that empty elements will change the
* result.
*/
case RTLessStrategyNumber:
case RTLessEqualStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTRightStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
if (!DatumGetBool(result))
PG_RETURN_BOOL(true);
PG_RETURN_DATUM(column->bv_values[INCLUSION_CONTAINS_EMPTY]);
case RTSameStrategyNumber:
case RTEqualStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTContainsStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
if (DatumGetBool(result))
PG_RETURN_BOOL(true);
PG_RETURN_DATUM(column->bv_values[INCLUSION_CONTAINS_EMPTY]);
case RTGreaterEqualStrategyNumber:
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTLeftStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
if (!DatumGetBool(result))
PG_RETURN_BOOL(true);
PG_RETURN_DATUM(column->bv_values[INCLUSION_CONTAINS_EMPTY]);
case RTGreaterStrategyNumber:
/* no need to check for empty elements */
finfo = inclusion_get_strategy_procinfo(bdesc, attno, subtype,
RTLeftStrategyNumber);
result = FunctionCall2Coll(finfo, colloid, unionval, query);
PG_RETURN_BOOL(!DatumGetBool(result));
default:
/* shouldn't happen */
elog(ERROR, "invalid strategy number %d", key->sk_strategy);
PG_RETURN_BOOL(false);
}
}
/*
* BRIN inclusion union function
*
* Given two BrinValues, update the first of them as a union of the summary
* values contained in both. The second one is untouched.
*/
Datum
brin_inclusion_union(PG_FUNCTION_ARGS)
{
BrinDesc *bdesc = (BrinDesc *) PG_GETARG_POINTER(0);
BrinValues *col_a = (BrinValues *) PG_GETARG_POINTER(1);
BrinValues *col_b = (BrinValues *) PG_GETARG_POINTER(2);
Oid colloid = PG_GET_COLLATION();
AttrNumber attno;
Form_pg_attribute attr;
FmgrInfo *finfo;
Datum result;
Assert(col_a->bv_attno == col_b->bv_attno);
/* Adjust "hasnulls". */
if (!col_a->bv_hasnulls && col_b->bv_hasnulls)
col_a->bv_hasnulls = true;
/* If there are no values in B, there's nothing left to do. */
if (col_b->bv_allnulls)
PG_RETURN_VOID();
attno = col_a->bv_attno;
attr = TupleDescAttr(bdesc->bd_tupdesc, attno - 1);
/*
* Adjust "allnulls". If A doesn't have values, just copy the values from
* B into A, and we're done. We cannot run the operators in this case,
* because values in A might contain garbage. Note we already established
* that B contains values.
*/
if (col_a->bv_allnulls)
{
col_a->bv_allnulls = false;
col_a->bv_values[INCLUSION_UNION] =
datumCopy(col_b->bv_values[INCLUSION_UNION],
attr->attbyval, attr->attlen);
col_a->bv_values[INCLUSION_UNMERGEABLE] =
col_b->bv_values[INCLUSION_UNMERGEABLE];
col_a->bv_values[INCLUSION_CONTAINS_EMPTY] =
col_b->bv_values[INCLUSION_CONTAINS_EMPTY];
PG_RETURN_VOID();
}
/* If B includes empty elements, mark A similarly, if needed. */
if (!DatumGetBool(col_a->bv_values[INCLUSION_CONTAINS_EMPTY]) &&
DatumGetBool(col_b->bv_values[INCLUSION_CONTAINS_EMPTY]))
col_a->bv_values[INCLUSION_CONTAINS_EMPTY] = BoolGetDatum(true);
/* Check if A includes elements that are not mergeable. */
if (DatumGetBool(col_a->bv_values[INCLUSION_UNMERGEABLE]))
PG_RETURN_VOID();
/* If B includes elements that are not mergeable, mark A similarly. */
if (DatumGetBool(col_b->bv_values[INCLUSION_UNMERGEABLE]))
{
col_a->bv_values[INCLUSION_UNMERGEABLE] = BoolGetDatum(true);
PG_RETURN_VOID();
}
/* Check if A and B are mergeable; if not, mark A unmergeable. */
finfo = inclusion_get_procinfo(bdesc, attno, PROCNUM_MERGEABLE);
if (finfo != NULL &&
!DatumGetBool(FunctionCall2Coll(finfo, colloid,
col_a->bv_values[INCLUSION_UNION],
col_b->bv_values[INCLUSION_UNION])))
{
col_a->bv_values[INCLUSION_UNMERGEABLE] = BoolGetDatum(true);
PG_RETURN_VOID();
}
/* Finally, merge B to A. */
finfo = inclusion_get_procinfo(bdesc, attno, PROCNUM_MERGE);
Assert(finfo != NULL);
result = FunctionCall2Coll(finfo, colloid,
col_a->bv_values[INCLUSION_UNION],
col_b->bv_values[INCLUSION_UNION]);
if (!attr->attbyval)
pfree(DatumGetPointer(col_a->bv_values[INCLUSION_UNION]));
col_a->bv_values[INCLUSION_UNION] = result;
PG_RETURN_VOID();
}
/*
* Cache and return inclusion opclass support procedure
*
* Return the procedure corresponding to the given function support number
* or null if it is not exists.
*/
static FmgrInfo *
inclusion_get_procinfo(BrinDesc *bdesc, uint16 attno, uint16 procnum)
{
InclusionOpaque *opaque;
uint16 basenum = procnum - PROCNUM_BASE;
/*
* We cache these in the opaque struct, to avoid repetitive syscache
* lookups.
*/
opaque = (InclusionOpaque *) bdesc->bd_info[attno - 1]->oi_opaque;
/*
* If we already searched for this proc and didn't find it, don't bother
* searching again.
*/
if (opaque->extra_proc_missing[basenum])
return NULL;
if (opaque->extra_procinfos[basenum].fn_oid == InvalidOid)
{
if (RegProcedureIsValid(index_getprocid(bdesc->bd_index, attno,
procnum)))
{
fmgr_info_copy(&opaque->extra_procinfos[basenum],
index_getprocinfo(bdesc->bd_index, attno, procnum),
bdesc->bd_context);
}
else
{
opaque->extra_proc_missing[basenum] = true;
return NULL;
}
}
return &opaque->extra_procinfos[basenum];
}
/*
* Cache and return the procedure of the given strategy
*
* Return the procedure corresponding to the given sub-type and strategy
* number. The data type of the index will be used as the left hand side of
* the operator and the given sub-type will be used as the right hand side.
* Throws an error if the pg_amop row does not exist, but that should not
* happen with a properly configured opclass.
*
* It always throws an error when the data type of the opclass is different
* from the data type of the column or the expression. That happens when the
* column data type has implicit cast to the opclass data type. We don't
* bother casting types, because this situation can easily be avoided by
* setting storage data type to that of the opclass. The same problem does not
* apply to the data type of the right hand side, because the type in the
* ScanKey always matches the opclass' one.
*
* Note: this function mirrors minmax_get_strategy_procinfo; if changes are
* made here, see that function too.
*/
static FmgrInfo *
inclusion_get_strategy_procinfo(BrinDesc *bdesc, uint16 attno, Oid subtype,
uint16 strategynum)
{
InclusionOpaque *opaque;
Assert(strategynum >= 1 &&
strategynum <= RTMaxStrategyNumber);
opaque = (InclusionOpaque *) bdesc->bd_info[attno - 1]->oi_opaque;
/*
* We cache the procedures for the last sub-type in the opaque struct, to
* avoid repetitive syscache lookups. If the sub-type is changed,
* invalidate all the cached entries.
*/
if (opaque->cached_subtype != subtype)
{
uint16 i;
for (i = 1; i <= RTMaxStrategyNumber; i++)
opaque->strategy_procinfos[i - 1].fn_oid = InvalidOid;
opaque->cached_subtype = subtype;
}
if (opaque->strategy_procinfos[strategynum - 1].fn_oid == InvalidOid)
{
Form_pg_attribute attr;
HeapTuple tuple;
Oid opfamily,
oprid;
bool isNull;
opfamily = bdesc->bd_index->rd_opfamily[attno - 1];
attr = TupleDescAttr(bdesc->bd_tupdesc, attno - 1);
tuple = SearchSysCache4(AMOPSTRATEGY, ObjectIdGetDatum(opfamily),
ObjectIdGetDatum(attr->atttypid),
ObjectIdGetDatum(subtype),
Int16GetDatum(strategynum));
if (!HeapTupleIsValid(tuple))
elog(ERROR, "missing operator %d(%u,%u) in opfamily %u",
strategynum, attr->atttypid, subtype, opfamily);
oprid = DatumGetObjectId(SysCacheGetAttr(AMOPSTRATEGY, tuple,
Anum_pg_amop_amopopr, &isNull));
ReleaseSysCache(tuple);
Assert(!isNull && RegProcedureIsValid(oprid));
fmgr_info_cxt(get_opcode(oprid),
&opaque->strategy_procinfos[strategynum - 1],
bdesc->bd_context);
}
return &opaque->strategy_procinfos[strategynum - 1];
}
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