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/*
Copyright (C) 2017 Brazil
Copyright (C) 2019-2022 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
*/
#ifdef GRN_EMBEDDED
# define GRN_PLUGIN_FUNCTION_TAG functions_time
#endif
#include <groonga/plugin.h>
static grn_rc
selector_index_column_df_ratio_between(grn_ctx *ctx,
grn_obj *table,
grn_obj *index,
int n_args,
grn_obj **args,
grn_obj *res,
grn_operator op)
{
grn_rc rc = GRN_SUCCESS;
grn_obj *index_column;
grn_ii *ii;
double min;
double max;
grn_obj *source_table;
unsigned int n_documents;
grn_posting posting;
if ((n_args - 1) != 3) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"index_column_df_ratio_between(): "
"wrong number of arguments (%d for 3)", n_args - 1);
rc = ctx->rc;
goto exit;
}
index_column = args[1];
ii = (grn_ii *)index_column;
min = GRN_FLOAT_VALUE(args[2]);
max = GRN_FLOAT_VALUE(args[3]);
source_table = grn_ctx_at(ctx, grn_obj_get_range(ctx, index_column));
n_documents = grn_table_size(ctx, source_table);
memset(&posting, 0, sizeof(grn_posting));
posting.sid = 1;
if (op == GRN_OP_AND) {
GRN_TABLE_EACH_BEGIN(ctx, res, cursor, record_id) {
void *key;
grn_id term_id;
uint32_t n_match_documents;
double df_ratio;
grn_table_cursor_get_key(ctx, cursor, &key);
term_id = *(grn_id *)key;
n_match_documents = grn_ii_estimate_size(ctx, ii, term_id);
if (n_match_documents > n_documents) {
n_match_documents = n_documents;
}
df_ratio = (double)n_match_documents / (double)n_documents;
if (min <= df_ratio && df_ratio <= max) {
posting.rid = term_id;
grn_ii_posting_add(ctx, &posting, (grn_hash *)res, op);
}
} GRN_TABLE_EACH_END(ctx, cursor);
grn_ii_resolve_sel_and(ctx, (grn_hash *)res, op);
} else {
GRN_TABLE_EACH_BEGIN(ctx, table, cursor, term_id) {
uint32_t n_match_documents;
double df_ratio;
n_match_documents = grn_ii_estimate_size(ctx, ii, term_id);
if (n_match_documents > n_documents) {
n_match_documents = n_documents;
}
df_ratio = (double)n_match_documents / (double)n_documents;
{
void *key;
int key_size;
key_size = grn_table_cursor_get_key(ctx, cursor, &key);
}
if (min <= df_ratio && df_ratio <= max) {
posting.rid = term_id;
grn_ii_posting_add(ctx, &posting, (grn_hash *)res, op);
}
} GRN_TABLE_EACH_END(ctx, cursor);
}
exit :
return rc;
}
typedef struct {
grn_id term_id;
grn_obj *term_table;
grn_obj *index_column;
} caller_index_info;
static void
caller_index_info_fin(grn_ctx *ctx,
caller_index_info *caller_index_info)
{
if (caller_index_info->index_column) {
grn_obj_unref(ctx, caller_index_info->index_column);
}
if (caller_index_info->term_table) {
grn_obj_unref(ctx, caller_index_info->term_table);
}
}
static grn_rc
caller_index_info_init(grn_ctx *ctx,
caller_index_info *caller_index_info,
grn_obj *index_column_name,
grn_user_data *user_data,
const char *error_message_label)
{
caller_index_info->term_id = GRN_ID_NIL;
caller_index_info->term_table = NULL;
caller_index_info->index_column = NULL;
{
grn_obj *expr;
grn_obj *variable;
expr = grn_plugin_proc_get_caller(ctx, user_data);
if (!expr) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s: "
"called directly", error_message_label);
return ctx->rc;
}
variable = grn_expr_get_var_by_offset(ctx, expr, 0);
if (!variable) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s: "
"caller expression must have target record information",
error_message_label);
return ctx->rc;
}
caller_index_info->term_table = grn_ctx_at(ctx, variable->header.domain);
caller_index_info->term_id = GRN_RECORD_VALUE(variable);
while (true) {
grn_obj *key_type;
key_type = grn_ctx_at(ctx, caller_index_info->term_table->header.domain);
if (!grn_obj_is_table(ctx, key_type)) {
grn_obj_unref(ctx, key_type);
break;
}
grn_table_get_key(ctx,
caller_index_info->term_table,
caller_index_info->term_id,
&(caller_index_info->term_id),
sizeof(grn_id));
grn_obj_unref(ctx, caller_index_info->term_table);
caller_index_info->term_table = key_type;
}
}
if (!grn_obj_is_text_family_bulk(ctx, index_column_name)) {
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, index_column_name);
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s: "
"the first argument must be index column name: %.*s",
error_message_label,
(int)GRN_TEXT_LEN(&inspected),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
caller_index_info_fin(ctx, caller_index_info);
return ctx->rc;
}
caller_index_info->index_column =
grn_obj_column(ctx,
caller_index_info->term_table,
GRN_TEXT_VALUE(index_column_name),
(uint32_t)GRN_TEXT_LEN(index_column_name));
if (!caller_index_info->index_column) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"%s: "
"nonexistent object: <%.*s>",
error_message_label,
(int)GRN_TEXT_LEN(index_column_name),
GRN_TEXT_VALUE(index_column_name));
caller_index_info_fin(ctx, caller_index_info);
return ctx->rc;
}
return GRN_SUCCESS;
}
static grn_obj *
func_index_column_df_ratio(grn_ctx *ctx,
int n_args,
grn_obj **args,
grn_user_data *user_data)
{
grn_ii *ii;
caller_index_info caller_index_info;
if (n_args != 1) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"index_column_df_ratio(): "
"wrong number of arguments (%d for 1)", n_args - 1);
return NULL;
}
if (caller_index_info_init(ctx,
&caller_index_info,
args[0],
user_data,
"index_column_df_ratio()") != GRN_SUCCESS) {
return NULL;
}
ii = (grn_ii *)caller_index_info.index_column;
{
grn_obj *source_table;
unsigned int n_documents;
uint32_t n_match_documents;
double df_ratio;
grn_obj *df_ratio_value;
source_table = grn_ctx_at(ctx, grn_obj_get_range(ctx, caller_index_info.index_column));
n_documents = grn_table_size(ctx, source_table);
n_match_documents = grn_ii_estimate_size(ctx, ii, caller_index_info.term_id);
if (n_match_documents > n_documents) {
n_match_documents = n_documents;
}
df_ratio = (double)n_match_documents / (double)n_documents;
grn_obj_unref(ctx, source_table);
df_ratio_value = grn_plugin_proc_alloc(ctx, user_data, GRN_DB_FLOAT, 0);
if (df_ratio_value) {
GRN_FLOAT_SET(ctx, df_ratio_value, df_ratio);
}
caller_index_info_fin(ctx, &caller_index_info);
return df_ratio_value;
}
}
static grn_obj *
func_index_column_source_records(grn_ctx *ctx,
int n_args,
grn_obj **args,
grn_user_data *user_data)
{
grn_ii *ii;
caller_index_info caller_index_info;
int64_t limit = -1;
if (n_args < 1 || n_args > 2) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"index_column_source_records(): "
"wrong number of arguments (%d for 1..2)", n_args - 1);
return NULL;
}
if (caller_index_info_init(ctx,
&caller_index_info,
args[0],
user_data,
"index_column_source_records()") != GRN_SUCCESS) {
return NULL;
}
if (n_args == 2) {
grn_obj *options = args[1];
switch (options->header.type) {
case GRN_TABLE_HASH_KEY :
{
grn_hash_cursor *cursor;
void *key;
int key_size;
cursor = grn_hash_cursor_open(ctx, (grn_hash *)options,
NULL, 0, NULL, 0,
0, -1, 0);
if (!cursor) {
GRN_PLUGIN_ERROR(ctx, GRN_NO_MEMORY_AVAILABLE,
"index_column_source_records(): failed to open cursor for options");
caller_index_info_fin(ctx, &caller_index_info);
return NULL;
}
while (grn_hash_cursor_next(ctx, cursor) != GRN_ID_NIL) {
void *value;
grn_obj *proc_value;
grn_hash_cursor_get_key_value(ctx, cursor, &key, &key_size, &value);
proc_value = value;
#define KEY_EQUAL(name) \
(key_size == strlen(name) && memcmp(key, name, strlen(name)) == 0)
if (KEY_EQUAL("limit")) {
limit = grn_plugin_proc_get_value_int64(ctx,
proc_value,
limit,
"index_column_source_records()");
if (ctx->rc != GRN_SUCCESS) {
grn_hash_cursor_close(ctx, cursor);
caller_index_info_fin(ctx, &caller_index_info);
return NULL;
}
} else {
GRN_PLUGIN_ERROR(ctx, GRN_INVALID_ARGUMENT,
"index_column_source_records(): unknown option name: <%.*s>",
key_size, (char *)key);
grn_hash_cursor_close(ctx, cursor);
caller_index_info_fin(ctx, &caller_index_info);
return NULL;
}
#undef KEY_EQUAL
}
grn_hash_cursor_close(ctx, cursor);
}
break;
default :
{
grn_obj inspected;
GRN_TEXT_INIT(&inspected, 0);
grn_inspect(ctx, &inspected, options);
GRN_PLUGIN_ERROR(ctx, GRN_INVALID_ARGUMENT,
"index_column_source_records(): "
"2nd argument must be object literal: <%.*s>",
(int)GRN_TEXT_LEN(&inspected),
GRN_TEXT_VALUE(&inspected));
GRN_OBJ_FIN(ctx, &inspected);
caller_index_info_fin(ctx, &caller_index_info);
return NULL;
}
}
}
ii = (grn_ii *)caller_index_info.index_column;
{
grn_obj *records;
records = grn_plugin_proc_alloc(ctx, user_data,
grn_obj_get_range(ctx, caller_index_info.index_column),
GRN_OBJ_VECTOR);
if (!records) {
caller_index_info_fin(ctx, &caller_index_info);
return NULL;
}
{
grn_ii_cursor *ii_cursor;
grn_posting *posting;
int64_t n_records = 0;
ii_cursor = grn_ii_cursor_open(ctx,
ii,
caller_index_info.term_id,
GRN_ID_NIL,
GRN_ID_MAX,
(int)grn_ii_get_n_elements(ctx, ii),
0);
if (ii_cursor) {
while ((posting = grn_ii_cursor_next(ctx, ii_cursor))) {
if (limit > 0 && n_records >= limit) {
break;
}
GRN_RECORD_PUT(ctx, records, posting->rid);
n_records++;
}
grn_ii_cursor_close(ctx, ii_cursor);
}
}
caller_index_info_fin(ctx, &caller_index_info);
return records;
}
}
static grn_obj *
func_index_column_have_source_record(grn_ctx *ctx,
int n_args,
grn_obj **args,
grn_user_data *user_data)
{
grn_ii *ii;
caller_index_info caller_index_info;
if (n_args != 1) {
GRN_PLUGIN_ERROR(ctx,
GRN_INVALID_ARGUMENT,
"index_column_have_source_record(): "
"wrong number of arguments (%d for 1)", n_args - 1);
return NULL;
}
grn_rc rc = caller_index_info_init(ctx,
&caller_index_info,
args[0],
user_data,
"index_column_have_source_record()");
if (rc != GRN_SUCCESS) {
return NULL;
}
ii = (grn_ii *)caller_index_info.index_column;
grn_obj *have =
grn_plugin_proc_alloc(ctx, user_data, GRN_DB_BOOL, 0);
if (!have) {
caller_index_info_fin(ctx, &caller_index_info);
return NULL;
}
GRN_BOOL_SET(ctx, have, false);
{
grn_ii_cursor *ii_cursor;
ii_cursor = grn_ii_cursor_open(ctx,
ii,
caller_index_info.term_id,
GRN_ID_NIL,
GRN_ID_MAX,
(int)grn_ii_get_n_elements(ctx, ii),
0);
if (ii_cursor) {
grn_posting *posting;
while ((posting = grn_ii_cursor_next(ctx, ii_cursor))) {
GRN_BOOL_SET(ctx, have, true);
true;
}
grn_ii_cursor_close(ctx, ii_cursor);
}
}
caller_index_info_fin(ctx, &caller_index_info);
return have;
}
grn_rc
GRN_PLUGIN_INIT(grn_ctx *ctx)
{
return ctx->rc;
}
grn_rc
GRN_PLUGIN_REGISTER(grn_ctx *ctx)
{
grn_obj *selector_proc;
selector_proc = grn_proc_create(ctx, "index_column_df_ratio_between", -1,
GRN_PROC_FUNCTION,
NULL, NULL, NULL, 0, NULL);
grn_proc_set_selector(ctx, selector_proc,
selector_index_column_df_ratio_between);
grn_proc_set_selector_operator(ctx, selector_proc, GRN_OP_NOP);
grn_proc_create(ctx, "index_column_df_ratio", -1,
GRN_PROC_FUNCTION,
func_index_column_df_ratio, NULL, NULL, 0, NULL);
grn_proc_create(ctx, "index_column_source_records", -1,
GRN_PROC_FUNCTION,
func_index_column_source_records, NULL, NULL, 0, NULL);
grn_proc_create(ctx, "index_column_have_source_record", -1,
GRN_PROC_FUNCTION,
func_index_column_have_source_record, NULL, NULL, 0, NULL);
return ctx->rc;
}
grn_rc
GRN_PLUGIN_FIN(grn_ctx *ctx)
{
return GRN_SUCCESS;
}
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