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gpu_preagg.c
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/*
* gpu_groupby.c
*
* Aggregation and Group-By with GPU acceleration
* ----
* Copyright 2011-2023 (C) KaiGai Kohei <[email protected]>
* Copyright 2014-2023 (C) PG-Strom Developers Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the PostgreSQL License.
*/
#include "pg_strom.h"
/* static variables */
static create_upper_paths_hook_type create_upper_paths_next = NULL;
static CustomPathMethods gpupreagg_path_methods;
static CustomScanMethods gpupreagg_plan_methods;
static CustomExecMethods gpupreagg_exec_methods;
static CustomPathMethods dpupreagg_path_methods;
static CustomScanMethods dpupreagg_plan_methods;
static CustomExecMethods dpupreagg_exec_methods;
static bool pgstrom_enable_dpupreagg = false;
static bool pgstrom_enable_partitionwise_dpupreagg = false;
static bool pgstrom_enable_gpupreagg = false;
static bool pgstrom_enable_partitionwise_gpupreagg = false;
static bool pgstrom_enable_numeric_aggfuncs;
int pgstrom_hll_register_bits;
/*
* List of supported aggregate functions
*/
typedef struct
{
/* aggregate function can be preprocessed */
const char *aggfn_signature;
/*
* A pair of final/partial function will generate same result.
* Its prefix indicates the schema that stores these functions.
* c: pg_catalog ... the system default
* s: pgstrom ... PG-Strom's special ones
*/
const char *finalfn_signature;
const char *partfn_signature;
int partfn_action; /* any of KAGG_ACTION__* */
bool numeric_aware; /* ignored, if !enable_numeric_aggfuncs */
} aggfunc_catalog_t;
static aggfunc_catalog_t aggfunc_catalog_array[] = {
/* COUNT(*) = SUM(NROWS()) */
{"count()",
"s:fcount(int8)",
"s:nrows()",
KAGG_ACTION__NROWS_ANY, false
},
/* COUNT(X) = SUM(NROWS(X)) */
{"count(any)",
"s:fcount(int8)",
"s:nrows(any)",
KAGG_ACTION__NROWS_COND, false
},
/*
* MIN(X) = MIN(PMIN(X))
*/
{"min(int1)",
"s:min_i1(bytea)",
"s:pmin(int4)",
KAGG_ACTION__PMIN_INT32, false
},
{"min(int2)",
"s:min_i2(bytea)",
"s:pmin(int4)",
KAGG_ACTION__PMIN_INT32, false
},
{"min(int4)",
"s:min_i4(bytea)",
"s:pmin(int4)",
KAGG_ACTION__PMIN_INT32, false
},
{"min(int8)",
"s:min_i8(bytea)",
"s:pmin(int8)",
KAGG_ACTION__PMIN_INT64, false
},
{"min(float2)",
"s:min_f2(bytea)",
"s:pmin(float8)",
KAGG_ACTION__PMIN_FP64, false
},
{"min(float4)",
"s:min_f4(bytea)",
"s:pmin(float8)",
KAGG_ACTION__PMIN_FP64, false
},
{"min(float8)",
"s:min_f8(bytea)",
"s:pmin(float8)",
KAGG_ACTION__PMIN_FP64, false
},
{"min(numeric)",
"s:min_num(bytea)",
"s:pmin(float8)",
KAGG_ACTION__PMIN_FP64, true
},
{"min(money)",
"s:min_cash(bytea)",
"s:pmin(money)",
KAGG_ACTION__PMIN_INT64, false
},
{"min(date)",
"s:min_date(bytea)",
"s:pmin(date)",
KAGG_ACTION__PMIN_INT32, false
},
{"min(time)",
"s:min_time(bytea)",
"s:pmin(time)",
KAGG_ACTION__PMIN_INT64, false
},
{"min(timestamp)",
"s:min_ts(bytea)",
"s:pmin(timestamp)",
KAGG_ACTION__PMIN_INT64, false
},
{"min(timestamptz)",
"s:min_tstz(bytea)",
"s:pmin(timestamptz)",
KAGG_ACTION__PMIN_INT64, false
},
/*
* MAX(X) = MAX(PMAX(X))
*/
{"max(int1)",
"s:max_i1(bytea)",
"s:pmax(int4)",
KAGG_ACTION__PMAX_INT32, false
},
{"max(int2)",
"s:max_i2(bytea)",
"s:pmax(int4)",
KAGG_ACTION__PMAX_INT32, false
},
{"max(int4)",
"s:max_i4(bytea)",
"s:pmax(int4)",
KAGG_ACTION__PMAX_INT32, false
},
{"max(int8)",
"s:max_i8(bytea)",
"s:pmax(int8)",
KAGG_ACTION__PMAX_INT64, false
},
{"max(float2)",
"s:max_f2(bytea)",
"s:pmax(float8)",
KAGG_ACTION__PMAX_FP64, false
},
{"max(float4)",
"s:max_f4(bytea)",
"s:pmax(float8)",
KAGG_ACTION__PMAX_FP64, false
},
{"max(float8)",
"s:max_f8(bytea)",
"s:pmax(float8)",
KAGG_ACTION__PMAX_FP64, false
},
{"max(numeric)",
"s:max_num(bytea)",
"s:pmax(float8)",
KAGG_ACTION__PMAX_FP64, true
},
{"max(money)",
"s:max_cash(bytea)",
"s:pmax(money)",
KAGG_ACTION__PMAX_INT64, false
},
{"max(date)",
"s:max_date(bytea)",
"s:pmax(date)",
KAGG_ACTION__PMAX_INT32, false
},
{"max(time)",
"s:max_time(bytea)",
"s:pmax(time)",
KAGG_ACTION__PMAX_INT64, false
},
{"max(timestamp)",
"s:max_ts(bytea)",
"s:pmax(timestamp)",
KAGG_ACTION__PMAX_INT64, false
},
{"max(timestamptz)",
"s:max_tstz(bytea)",
"s:pmax(timestamptz)",
KAGG_ACTION__PMAX_INT64, false
},
/*
* SUM(X) = SUM(PSUM(X))
*/
{"sum(int1)",
"s:sum_int(bytea)",
"s:psum(int8)",
KAGG_ACTION__PSUM_INT, false
},
{"sum(int2)",
"s:sum_int(bytea)",
"s:psum(int8)",
KAGG_ACTION__PSUM_INT, false
},
{"sum(int4)",
"s:sum_int(bytea)",
"s:psum(int8)",
KAGG_ACTION__PSUM_INT, false
},
{"sum(int8)",
"s:sum_int_num(bytea)",
"s:psum(int8)",
KAGG_ACTION__PSUM_INT, false
},
{"sum(float2)",
"s:sum_fp64(bytea)",
"s:psum(float8)",
KAGG_ACTION__PSUM_FP, false
},
{"sum(float4)",
"s:sum_fp32(bytea)",
"s:psum(float8)",
KAGG_ACTION__PSUM_FP, false
},
{"sum(float8)",
"s:sum_fp64(bytea)",
"s:psum(float8)",
KAGG_ACTION__PSUM_FP, false
},
{"sum(numeric)",
"s:sum_fp_num(bytea)",
"s:psum(float8)",
KAGG_ACTION__PSUM_FP, true
},
{"sum(money)",
"s:sum_cash(bytea)",
"s:psum(money)",
KAGG_ACTION__PSUM_INT, false
},
/*
* AVG(X) = EX_AVG(NROWS(X), PSUM(X))
*/
{"avg(int1)",
"s:avg_int(bytea)",
"s:pavg(int8)",
KAGG_ACTION__PAVG_INT, false
},
{"avg(int2)",
"s:avg_int(bytea)",
"s:pavg(int8)",
KAGG_ACTION__PAVG_INT, false
},
{"avg(int4)",
"s:avg_int(bytea)",
"s:pavg(int8)",
KAGG_ACTION__PAVG_INT, false
},
{"avg(int8)",
"s:avg_int(bytea)",
"s:pavg(int8)",
KAGG_ACTION__PAVG_INT, false
},
{"avg(float2)",
"s:avg_fp(bytea)",
"s:pavg(float8)",
KAGG_ACTION__PAVG_FP, false
},
{"avg(float4)",
"s:avg_fp(bytea)",
"s:pavg(float8)",
KAGG_ACTION__PAVG_FP, false
},
{"avg(float8)",
"s:avg_fp(bytea)",
"s:pavg(float8)",
KAGG_ACTION__PAVG_FP, false
},
{"avg(numeric)",
"s:avg_num(bytea)",
"s:pavg(float8)",
KAGG_ACTION__PAVG_FP, true
},
/*
* STDDEV(X) = EX_STDDEV_SAMP(NROWS(),PSUM(X),PSUM(X*X))
*/
{"stddev(int1)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev(int2)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev(int4)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev(int8)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev(float2)",
"s:stddev_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev(float4)",
"s:stddev_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev(float8)",
"s:stddev_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev(numeric)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, true
},
/*
* STDDEV_SAMP(X) = EX_STDDEV_SAMP(NROWS(),PSUM(X),PSUM(X*X))
*/
{"stddev_samp(int1)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_samp(int2)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_samp(int4)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_samp(int8)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_samp(float2)",
"s:stddev_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_samp(float4)",
"s:stddev_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_samp(float8)",
"s:stddev_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_samp(numeric)",
"s:stddev_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, true
},
/*
* STDDEV_POP(X) = EX_STDDEV(NROWS(),PSUM(X),PSUM(X*X))
*/
{"stddev_pop(int1)",
"s:stddev_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_pop(int2)",
"s:stddev_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_pop(int4)",
"s:stddev_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_pop(int8)",
"s:stddev_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_pop(float2)",
"s:stddev_popf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_pop(float4)",
"s:stddev_popf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_pop(float8)",
"s:stddev_popf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"stddev_pop(numeric)",
"s:stddev_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, true
},
/*
* VARIANCE(X) = VAR_SAMP(NROWS(), PSUM(X),PSUM(X^2))
*/
{"variance(int1)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"variance(int2)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"variance(int4)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"variance(int8)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"variance(float2)",
"s:var_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"variance(float4)",
"s:var_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"variance(float8)",
"s:var_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"variance(numeric)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, true
},
/*
* VAR_SAMP(X) = VAR_SAMP(NROWS(), PSUM(X),PSUM(X^2))
*/
{"var_samp(int1)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_samp(int2)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_samp(int4)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_samp(int8)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_samp(float2)",
"s:var_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_samp(float4)",
"s:var_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_samp(float8)",
"s:var_sampf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_samp(numeric)",
"s:var_samp(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, true
},
/*
* VAR_POP(X) = VAR_POP(NROWS(), PSUM(X),PSUM(X^2))
*/
{"var_pop(int1)",
"s:var_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_pop(int2)",
"s:var_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_pop(int4)",
"s:var_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false},
{"var_pop(int8)",
"s:var_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_pop(float2)",
"s:var_popf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_pop(float4)",
"s:var_popf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_pop(float8)",
"s:var_popf(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, false
},
{"var_pop(numeric)",
"s:var_pop(bytea)",
"s:pvariance(float8)",
KAGG_ACTION__STDDEV, true
},
/*
* CORR(X,Y) = PGSTROM.CORR(NROWS(X,Y),
* PCOV_X(X,Y), PCOV_Y(X,Y)
* PCOV_X2(X,Y), PCOV_Y2(X,Y),
* PCOV_XY(X,Y))
*/
{"corr(float8,float8)",
"s:covar_samp(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"covar_samp(float8,float8)",
"s:covar_samp(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"covar_pop(float8,float8)",
"s:covar_pop(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
/*
* Aggregation to support least squares method
*
* That takes PSUM_X, PSUM_Y, PSUM_X2, PSUM_Y2, PSUM_XY according
* to the function
*/
{"regr_avgx(float8,float8)",
"s:regr_avgx(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_avgy(float8,float8)",
"s:regr_avgy(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_count(float8,float8)",
"s:regr_count(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_intercept(float8,float8)",
"s:regr_intercept(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_r2(float8,float8)",
"s:regr_r2(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_slope(float8,float8)",
"s:regr_slope(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_sxx(float8,float8)",
"s:regr_sxx(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_sxy(float8,float8)",
"s:regr_sxy(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{"regr_syy(float8,float8)",
"s:regr_syy(bytea)",
"s:pcovar(float8,float8)",
KAGG_ACTION__COVAR, false
},
{ NULL, NULL, NULL, -1, false },
};
/*
* aggfunc_catalog_entry; hashed catalog entry
*/
typedef struct
{
Oid aggfn_oid;
Oid final_func_oid;
Oid partial_func_oid;
Oid partial_func_rettype;
int partial_func_nargs;
int partial_func_action;
int partial_func_bufsz;
bool numeric_aware;
bool is_valid_entry;
} aggfunc_catalog_entry;
static HTAB *aggfunc_catalog_htable = NULL;
static void
aggfunc_catalog_htable_invalidator(Datum arg, int cacheid, uint32 hashvalue)
{
hash_destroy(aggfunc_catalog_htable);
aggfunc_catalog_htable = NULL;
}
static Oid
__aggfunc_resolve_func_signature(const char *signature)
{
char *fn_name = alloca(strlen(signature));
Oid fn_namespace;
oidvector *fn_argtypes;
int fn_nargs = 0;
Oid fn_oid;
Oid type_oid;
char *base, *tok, *pos;
if (strncmp(signature, "c:", 2) == 0)
fn_namespace = PG_CATALOG_NAMESPACE;
else if (strncmp(signature, "s:", 2) == 0)
fn_namespace = get_namespace_oid("pgstrom", false);
else
elog(ERROR, "wrong function signature: %s", signature);
strcpy(fn_name, signature + 2);
base = strchr(fn_name, '(');
if (!base)
elog(ERROR, "wrong function signature: %s", signature);
*base++ = '\0';
pos = strchr(base, ')');
if (!pos)
elog(ERROR, "wrong function signature: %s", signature);
*pos = '\0';
fn_argtypes = alloca(offsetof(oidvector, values[80]));
fn_argtypes->ndim = 1;
fn_argtypes->dataoffset = 0;
fn_argtypes->elemtype = OIDOID;
fn_argtypes->dim1 = 0;
fn_argtypes->lbound1 = 0;
for (tok = strtok_r(base, ",", &pos);
tok != NULL;
tok = strtok_r(NULL, ",", &pos))
{
type_oid = GetSysCacheOid2(TYPENAMENSP,
Anum_pg_type_oid,
CStringGetDatum(tok),
ObjectIdGetDatum(PG_CATALOG_NAMESPACE));
if (!OidIsValid(type_oid))
elog(ERROR, "cache lookup failed for type '%s'", tok);
fn_argtypes->values[fn_nargs++] = type_oid;
}
fn_argtypes->dim1 = fn_nargs;
SET_VARSIZE(fn_argtypes, offsetof(oidvector, values[fn_nargs]));
fn_oid = GetSysCacheOid3(PROCNAMEARGSNSP,
Anum_pg_proc_oid,
CStringGetDatum(fn_name),
PointerGetDatum(fn_argtypes),
ObjectIdGetDatum(fn_namespace));
if (!OidIsValid(fn_oid))
elog(ERROR, "Catalog corruption? '%s' was not found",
funcname_signature_string(fn_name,
fn_argtypes->dim1,
NIL,
fn_argtypes->values));
return fn_oid;
}
static void
__aggfunc_resolve_partial_func(aggfunc_catalog_entry *entry,
const char *partfn_signature,
int partfn_action)
{
Oid func_oid = __aggfunc_resolve_func_signature(partfn_signature);
Oid type_oid;
int func_nargs;
int partfn_bufsz;
switch (partfn_action)
{
case KAGG_ACTION__NROWS_ANY:
func_nargs = 0;
type_oid = INT8OID;
partfn_bufsz = sizeof(int64_t);
break;
case KAGG_ACTION__NROWS_COND:
func_nargs = 1;
type_oid = INT8OID;
partfn_bufsz = sizeof(int64_t);
break;
case KAGG_ACTION__PMIN_INT32:
case KAGG_ACTION__PMIN_INT64:
case KAGG_ACTION__PMAX_INT32:
case KAGG_ACTION__PMAX_INT64:
func_nargs = 1;
type_oid = BYTEAOID;
partfn_bufsz = sizeof(kagg_state__pminmax_int64_packed);
break;
case KAGG_ACTION__PMIN_FP64:
case KAGG_ACTION__PMAX_FP64:
func_nargs = 1;
type_oid = BYTEAOID;
partfn_bufsz = sizeof(kagg_state__pminmax_fp64_packed);
break;
case KAGG_ACTION__PAVG_INT:
case KAGG_ACTION__PSUM_INT:
func_nargs = 1;
type_oid = BYTEAOID;
partfn_bufsz = sizeof(kagg_state__psum_int_packed);
break;
case KAGG_ACTION__PAVG_FP:
case KAGG_ACTION__PSUM_FP:
func_nargs = 1;
type_oid = BYTEAOID;
partfn_bufsz = sizeof(kagg_state__psum_fp_packed);
break;
case KAGG_ACTION__STDDEV:
func_nargs = 1;
type_oid = BYTEAOID;
partfn_bufsz = sizeof(kagg_state__stddev_packed);
break;
case KAGG_ACTION__COVAR:
func_nargs = 2;
type_oid = BYTEAOID;
partfn_bufsz = sizeof(kagg_state__covar_packed);
break;
default:
elog(ERROR, "Catalog corruption? unknown action: %d", partfn_action);
break;
}
entry->partial_func_oid = func_oid;
entry->partial_func_rettype = get_func_rettype(func_oid);
entry->partial_func_nargs = get_func_nargs(func_oid);
entry->partial_func_action = partfn_action;
entry->partial_func_bufsz = partfn_bufsz;
if (entry->partial_func_rettype != type_oid ||
entry->partial_func_nargs != func_nargs ||
entry->partial_func_bufsz != MAXALIGN(partfn_bufsz))
elog(ERROR, "Catalog curruption? partial function mismatch: %s",
partfn_signature);
}
static void
__aggfunc_resolve_final_func(aggfunc_catalog_entry *entry,
const char *finalfn_signature,
Oid agg_rettype)
{
Oid func_oid = __aggfunc_resolve_func_signature(finalfn_signature);
HeapTuple htup;
Form_pg_proc proc;
if (!SearchSysCacheExists1(AGGFNOID, ObjectIdGetDatum(func_oid)) ||
get_func_rettype(func_oid) != agg_rettype)
elog(ERROR, "Catalog corruption? final function mismatch: %s",
format_procedure(func_oid));
htup = SearchSysCache1(PROCOID, ObjectIdGetDatum(func_oid));
if (!HeapTupleIsValid(htup))
elog(ERROR, "cache lookup failed for function %u", func_oid);
proc = (Form_pg_proc) GETSTRUCT(htup);
if (proc->pronargs != 1 ||
proc->proargtypes.dim1 != 1 ||
proc->proargtypes.values[0] != entry->partial_func_rettype)
elog(ERROR, "Catalog corruption? final function mismatch: %s",
format_procedure(func_oid));
ReleaseSysCache(htup);
entry->final_func_oid = func_oid;
}
static const aggfunc_catalog_entry *
aggfunc_catalog_lookup_by_oid(Oid aggfn_oid)
{
aggfunc_catalog_entry *entry;
bool found;
/* fast path by the hashtable */
if (!aggfunc_catalog_htable)
{
HASHCTL hctl;
memset(&hctl, 0, sizeof(HASHCTL));
hctl.keysize = sizeof(Oid);
hctl.entrysize = sizeof(aggfunc_catalog_entry);
hctl.hcxt = CacheMemoryContext;
aggfunc_catalog_htable = hash_create("XPU GroupBy Catalog Hash",
256,
&hctl,
HASH_ELEM | HASH_BLOBS | HASH_CONTEXT);
}
entry = hash_search(aggfunc_catalog_htable,
&aggfn_oid,
HASH_ENTER,
&found);
if (!found)
{
Form_pg_proc proc;
HeapTuple htup;
entry->is_valid_entry = false;
PG_TRY();
{
htup = SearchSysCache1(PROCOID, ObjectIdGetDatum(aggfn_oid));
if (!HeapTupleIsValid(htup))
elog(ERROR, "cache lookup failed for function %u", aggfn_oid);
proc = (Form_pg_proc) GETSTRUCT(htup);
if (proc->pronamespace == PG_CATALOG_NAMESPACE &&
proc->pronargs <= 2)
{
char buf[3*NAMEDATALEN+100];
int off;
off = sprintf(buf, "%s(", NameStr(proc->proname));
for (int j=0; j < proc->pronargs; j++)
{
Oid type_oid = proc->proargtypes.values[j];
char *type_name = get_type_name(type_oid, false);
off += sprintf(buf + off, "%s%s",
(j>0 ? "," : ""),
type_name);
}
off += sprintf(buf + off, ")");
for (int i=0; aggfunc_catalog_array[i].aggfn_signature != NULL; i++)
{
const aggfunc_catalog_t *cat = &aggfunc_catalog_array[i];
if (strcmp(buf, cat->aggfn_signature) == 0)
{
__aggfunc_resolve_partial_func(entry,
cat->partfn_signature,
cat->partfn_action);
__aggfunc_resolve_final_func(entry,
cat->finalfn_signature,
proc->prorettype);
entry->numeric_aware = cat->numeric_aware;
entry->is_valid_entry = true;
break;
}
}
}
ReleaseSysCache(htup);
}
PG_CATCH();
{
hash_search(aggfunc_catalog_htable, &aggfn_oid, HASH_REMOVE, NULL);
PG_RE_THROW();
}
PG_END_TRY();
}
if (!entry->is_valid_entry)
return NULL;
if (entry->numeric_aware && !pgstrom_enable_numeric_aggfuncs)
return NULL;
return entry;
}
/*
* xpugroupby_build_path_context
*/
typedef struct
{
bool device_executable;
PlannerInfo *root;
RelOptInfo *group_rel;
RelOptInfo *input_rel;
ParamPathInfo *param_info;
double num_groups;
bool try_parallel;
PathTarget *target_upper;
PathTarget *target_partial;
PathTarget *target_final;
AggClauseCosts final_clause_costs;
pgstromPlanInfo *pp_info;
int sibling_param_id;
List *inner_paths_list;
List *inner_target_list;
List *groupby_keys;
List *groupby_keys_refno;
Node *havingQual;
} xpugroupby_build_path_context;
/*
* make_expr_typecast - constructor of type cast
*/
static Expr *
make_expr_typecast(Expr *expr, Oid target_type)
{
Oid source_type = exprType((Node *) expr);
HeapTuple htup;
Form_pg_cast cast;
if (target_type == source_type ||
target_type == ANYOID)
return expr;
htup = SearchSysCache2(CASTSOURCETARGET,
ObjectIdGetDatum(source_type),
ObjectIdGetDatum(target_type));
if (!HeapTupleIsValid(htup))
elog(ERROR, "cache lookup failed for cast (%s -> %s)",
format_type_be(source_type),
format_type_be(target_type));
cast = (Form_pg_cast) GETSTRUCT(htup);
if (cast->castmethod == COERCION_METHOD_BINARY)
{
RelabelType *relabel = makeNode(RelabelType);
relabel->arg = expr;
relabel->resulttype = target_type;
relabel->resulttypmod = exprTypmod((Node *) expr);
relabel->resultcollid = exprCollation((Node *) expr);
relabel->relabelformat = COERCE_IMPLICIT_CAST;
relabel->location = -1;
expr = (Expr *) relabel;
}
else if (cast->castmethod == COERCION_METHOD_FUNCTION)
{
Assert(OidIsValid(cast->castfunc));
expr = (Expr *)makeFuncExpr(cast->castfunc,
target_type,
list_make1(expr),
InvalidOid, /* always right? */
exprCollation((Node *) expr),
COERCE_IMPLICIT_CAST);
}
else
{
elog(ERROR, "cast-method '%c' is not supported in the kernel mode",
cast->castmethod);
}
ReleaseSysCache(htup);
return expr;
}
/*
* make_alternative_aggref
*
* It makes an alternative final aggregate function towards the supplied
* Aggref, and append its arguments on the target_partial/target_device.
*/
static Node *
make_alternative_aggref(xpugroupby_build_path_context *con, Aggref *aggref)
{
const aggfunc_catalog_entry *aggfn_cat;
PathTarget *target_partial = con->target_partial;
pgstromPlanInfo *pp_info = con->pp_info;
List *partfn_args = NIL;
Expr *partfn;
Aggref *aggref_alt;
Oid func_oid;
HeapTuple htup;
Form_pg_proc proc;
Form_pg_aggregate agg;