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/*
Copyright(C) 2016-2018 Brazil
Copyright(C) 2019-2021 Sutou Kouhei <kou@clear-code.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "grn_db.h"
#include "grn_window_functions.h"
static grn_rc
window_record_number(grn_ctx *ctx,
grn_obj *first_output_column,
grn_window *window,
grn_obj **first_args,
int first_n_args)
{
grn_id id;
uint32_t nth_record = 1;
grn_obj value;
GRN_UINT32_INIT(&value, 0);
while ((id = grn_window_next(ctx, window))) {
GRN_UINT32_SET(ctx, &value, nth_record);
grn_obj *output_column = grn_window_get_output_column(ctx, window);
if (output_column) {
grn_obj_set_value(ctx, output_column, id, &value, GRN_OBJ_SET);
}
nth_record++;
}
GRN_OBJ_FIN(ctx, &value);
return GRN_SUCCESS;
}
static grn_rc
window_sum(grn_ctx *ctx,
grn_obj *first_output_column,
grn_window *window,
grn_obj **first_args,
int first_n_args)
{
if (first_n_args != 1) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"window_sum(): wrong number of arguments (%d for 1)",
first_n_args);
return ctx->rc;
}
grn_obj *first_target = first_args[0];
if (!(grn_obj_is_scalar_column(ctx, first_target) ||
grn_obj_is_accessor(ctx, first_target))) {
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, first_target);
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"window_sum(): "
"the target column must be "
"scalar column or accessor: <%.*s>",
(int)GRN_TEXT_LEN(&inspected),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
return ctx->rc;
}
const grn_id target_range_id =
grn_obj_get_range(ctx, first_target);
switch (target_range_id) {
case GRN_DB_INT8 :
case GRN_DB_INT16 :
case GRN_DB_INT32 :
case GRN_DB_INT64 :
case GRN_DB_UINT8 :
case GRN_DB_UINT16 :
case GRN_DB_UINT32 :
case GRN_DB_UINT64 :
case GRN_DB_FLOAT32 :
case GRN_DB_FLOAT :
break;
default :
{
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, first_target);
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"window_sum(): "
"the target column must be number column: <%.*s>",
(int)GRN_TEXT_LEN(&inspected),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
return ctx->rc;
}
break;
}
grn_obj sum;
const grn_id output_column_range_id =
grn_obj_get_range(ctx, first_output_column);
switch (output_column_range_id) {
case GRN_DB_INT8 :
case GRN_DB_INT16 :
case GRN_DB_INT32 :
case GRN_DB_INT64 :
GRN_INT64_INIT(&sum, 0);
break;
case GRN_DB_UINT8 :
case GRN_DB_UINT16 :
case GRN_DB_UINT32 :
case GRN_DB_UINT64 :
GRN_UINT64_INIT(&sum, 0);
break;
case GRN_DB_FLOAT32 :
GRN_FLOAT32_INIT(&sum, 0);
break;
case GRN_DB_FLOAT :
GRN_FLOAT_INIT(&sum, 0);
break;
default :
{
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, first_output_column);
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"window_sum(): "
"the output column must be number column: <%.*s>",
(int)GRN_TEXT_LEN(&inspected),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
return ctx->rc;
}
break;
}
grn_obj value;
GRN_VOID_INIT(&value);
if (grn_window_is_sorted(ctx, window)) {
grn_id id;
while ((id = grn_window_next(ctx, window))) {
GRN_BULK_REWIND(&value);
grn_obj *target = grn_window_get_argument(ctx, window, 0);
grn_obj_get_value(ctx, target, id, &value);
switch (target_range_id) {
case GRN_DB_INT8 :
GRN_INT64_SET(ctx,
&sum,
GRN_INT64_VALUE(&sum) + GRN_INT8_VALUE(&value));
break;
case GRN_DB_INT16 :
GRN_INT64_SET(ctx,
&sum,
GRN_INT64_VALUE(&sum) + GRN_INT16_VALUE(&value));
break;
case GRN_DB_INT32 :
GRN_INT64_SET(ctx,
&sum,
GRN_INT64_VALUE(&sum) + GRN_INT32_VALUE(&value));
break;
case GRN_DB_INT64 :
GRN_INT64_SET(ctx,
&sum,
GRN_INT64_VALUE(&sum) + GRN_INT64_VALUE(&value));
break;
case GRN_DB_UINT8 :
GRN_UINT64_SET(ctx,
&sum,
GRN_UINT64_VALUE(&sum) + GRN_UINT8_VALUE(&value));
break;
case GRN_DB_UINT16 :
GRN_UINT64_SET(ctx,
&sum,
GRN_UINT64_VALUE(&sum) + GRN_UINT16_VALUE(&value));
break;
case GRN_DB_UINT32 :
GRN_UINT64_SET(ctx,
&sum,
GRN_UINT64_VALUE(&sum) + GRN_UINT32_VALUE(&value));
break;
case GRN_DB_UINT64 :
GRN_UINT64_SET(ctx,
&sum,
GRN_UINT64_VALUE(&sum) + GRN_UINT64_VALUE(&value));
break;
case GRN_DB_FLOAT32 :
GRN_FLOAT32_SET(ctx,
&sum,
GRN_FLOAT32_VALUE(&sum) + GRN_FLOAT32_VALUE(&value));
break;
case GRN_DB_FLOAT :
GRN_FLOAT_SET(ctx,
&sum,
GRN_FLOAT_VALUE(&sum) + GRN_FLOAT_VALUE(&value));
break;
default :
break;
}
grn_obj *output_column = grn_window_get_output_column(ctx, window);
if (output_column) {
grn_obj_set_value(ctx, output_column, id, &sum, GRN_OBJ_SET);
}
}
} else {
int64_t sum_raw_int64 = 0;
uint64_t sum_raw_uint64 = 0;
float sum_raw_float = 0.0;
double sum_raw_double = 0.0;
grn_id id;
while ((id = grn_window_next(ctx, window))) {
GRN_BULK_REWIND(&value);
grn_obj *target = grn_window_get_argument(ctx, window, 0);
grn_obj_get_value(ctx, target, id, &value);
switch (target_range_id) {
case GRN_DB_INT8 :
sum_raw_int64 += GRN_INT8_VALUE(&value);
break;
case GRN_DB_INT16 :
sum_raw_int64 += GRN_INT16_VALUE(&value);
break;
case GRN_DB_INT32 :
sum_raw_int64 += GRN_INT32_VALUE(&value);
break;
case GRN_DB_INT64 :
sum_raw_int64 += GRN_INT64_VALUE(&value);
break;
case GRN_DB_UINT8 :
sum_raw_uint64 += GRN_UINT8_VALUE(&value);
break;
case GRN_DB_UINT16 :
sum_raw_uint64 += GRN_UINT16_VALUE(&value);
break;
case GRN_DB_UINT32 :
sum_raw_uint64 += GRN_UINT32_VALUE(&value);
break;
case GRN_DB_UINT64 :
sum_raw_uint64 += GRN_UINT64_VALUE(&value);
break;
case GRN_DB_FLOAT32 :
sum_raw_float += GRN_FLOAT32_VALUE(&value);
break;
case GRN_DB_FLOAT :
sum_raw_double += GRN_FLOAT_VALUE(&value);
break;
default :
break;
}
}
switch (output_column_range_id) {
case GRN_DB_INT8 :
case GRN_DB_INT16 :
case GRN_DB_INT32 :
case GRN_DB_INT64 :
GRN_INT64_SET(ctx, &sum, sum_raw_int64);
break;
case GRN_DB_UINT8 :
case GRN_DB_UINT16 :
case GRN_DB_UINT32 :
case GRN_DB_UINT64 :
GRN_UINT64_SET(ctx, &sum, sum_raw_uint64);
break;
case GRN_DB_FLOAT32 :
GRN_FLOAT32_SET(ctx, &sum, sum_raw_float);
break;
case GRN_DB_FLOAT :
GRN_FLOAT_SET(ctx, &sum, sum_raw_double);
break;
}
grn_window_rewind(ctx, window);
while ((id = grn_window_next(ctx, window))) {
grn_obj *output_column = grn_window_get_output_column(ctx, window);
if (output_column) {
grn_obj_set_value(ctx, output_column, id, &sum, GRN_OBJ_SET);
}
}
}
GRN_OBJ_FIN(ctx, &value);
GRN_OBJ_FIN(ctx, &sum);
return GRN_SUCCESS;
}
static grn_rc
window_count(grn_ctx *ctx,
grn_obj *first_output_column,
grn_window *window,
grn_obj **first_args,
int first_n_args)
{
if (first_n_args != 0) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"window_count(): wrong number of arguments (%d for 0)",
first_n_args);
return ctx->rc;
}
grn_obj n_records;
grn_id output_column_range_id;
output_column_range_id = grn_obj_get_range(ctx, first_output_column);
switch (output_column_range_id) {
case GRN_DB_INT8 :
case GRN_DB_INT16 :
case GRN_DB_INT32 :
case GRN_DB_INT64 :
GRN_INT64_INIT(&n_records, 0);
break;
case GRN_DB_UINT8 :
case GRN_DB_UINT16 :
case GRN_DB_UINT32 :
case GRN_DB_UINT64 :
GRN_UINT64_INIT(&n_records, 0);
break;
case GRN_DB_FLOAT32 :
GRN_FLOAT32_INIT(&n_records, 0);
break;
case GRN_DB_FLOAT :
GRN_FLOAT_INIT(&n_records, 0);
break;
default :
{
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, first_output_column);
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"window_count(): "
"the output column must be number column: <%.*s>",
(int)GRN_TEXT_LEN(&inspected),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
return ctx->rc;
}
break;
}
if (grn_window_is_sorted(ctx, window)) {
uint32_t n_records_raw = 0;
grn_id id;
while ((id = grn_window_next(ctx, window))) {
n_records_raw++;
switch (output_column_range_id) {
case GRN_DB_INT8 :
case GRN_DB_INT16 :
case GRN_DB_INT32 :
case GRN_DB_INT64 :
GRN_INT64_SET(ctx, &n_records, n_records_raw);
break;
case GRN_DB_UINT8 :
case GRN_DB_UINT16 :
case GRN_DB_UINT32 :
case GRN_DB_UINT64 :
GRN_UINT64_SET(ctx, &n_records, n_records_raw);
break;
case GRN_DB_FLOAT32 :
GRN_FLOAT32_SET(ctx, &n_records, n_records_raw);
break;
case GRN_DB_FLOAT :
GRN_FLOAT_SET(ctx, &n_records, n_records_raw);
break;
default :
break;
}
grn_obj *output_column = grn_window_get_output_column(ctx, window);
if (output_column) {
grn_obj_set_value(ctx, output_column, id, &n_records, GRN_OBJ_SET);
}
}
} else {
uint32_t n_records_raw = 0;
grn_id id;
while ((id = grn_window_next(ctx, window))) {
n_records_raw++;
}
switch (output_column_range_id) {
case GRN_DB_INT8 :
case GRN_DB_INT16 :
case GRN_DB_INT32 :
case GRN_DB_INT64 :
GRN_INT64_SET(ctx, &n_records, n_records_raw);
break;
case GRN_DB_UINT8 :
case GRN_DB_UINT16 :
case GRN_DB_UINT32 :
case GRN_DB_UINT64 :
GRN_UINT64_SET(ctx, &n_records, n_records_raw);
break;
case GRN_DB_FLOAT32 :
GRN_FLOAT32_SET(ctx, &n_records, n_records_raw);
break;
case GRN_DB_FLOAT :
GRN_FLOAT_SET(ctx, &n_records, n_records_raw);
break;
}
grn_window_rewind(ctx, window);
while ((id = grn_window_next(ctx, window))) {
grn_obj *output_column = grn_window_get_output_column(ctx, window);
if (output_column) {
grn_obj_set_value(ctx, output_column, id, &n_records, GRN_OBJ_SET);
}
}
}
GRN_OBJ_FIN(ctx, &n_records);
return GRN_SUCCESS;
}
static grn_rc
window_rank(grn_ctx *ctx,
grn_obj *first_output_column,
grn_window *window,
grn_obj **first_args,
int first_n_args)
{
grn_id id;
uint32_t rank = 0;
uint32_t gap = 0;
grn_obj value;
GRN_UINT32_INIT(&value, 0);
while ((id = grn_window_next(ctx, window))) {
if (grn_window_is_value_changed(ctx, window)) {
rank += gap + 1;
gap = 0;
} else {
gap++;
}
GRN_UINT32_SET(ctx, &value, rank);
grn_obj *output_column = grn_window_get_output_column(ctx, window);
if (output_column) {
grn_obj_set_value(ctx, output_column, id, &value, GRN_OBJ_SET);
}
}
GRN_OBJ_FIN(ctx, &value);
return GRN_SUCCESS;
}
grn_rc
grn_db_init_builtin_window_functions(grn_ctx *ctx)
{
/* For backward compatibility. */
grn_window_function_create(ctx,
"record_number", -1,
window_record_number);
grn_window_function_create(ctx,
"window_record_number", -1,
window_record_number);
grn_window_function_create(ctx,
"window_sum", -1,
window_sum);
grn_window_function_create(ctx,
"window_count", -1,
window_count);
grn_window_function_create(ctx,
"window_rank", -1,
window_rank);
return GRN_SUCCESS;
}
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