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122 lines
3.2 KiB
C
122 lines
3.2 KiB
C
/* -*- c-basic-offset: 2 -*- */
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/*
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Copyright(C) 2017 Brazil
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License version 2.1 as published by the Free Software Foundation.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
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*/
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#include "grn.h"
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#include "grn_ctx.h"
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#include "grn_expr_executor.h"
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grn_rc
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grn_table_apply_expr(grn_ctx *ctx,
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grn_obj *table,
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grn_obj *output_column,
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grn_obj *expr)
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{
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grn_expr_executor *executor;
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GRN_API_ENTER;
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if (!grn_obj_is_data_column(ctx, output_column)) {
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grn_obj inspected;
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GRN_TEXT_INIT(&inspected, 0);
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grn_inspect(ctx, &inspected, output_column);
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ERR(GRN_INVALID_ARGUMENT,
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"[table][apply-expr] output column isn't data column: %.*s",
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(int)GRN_TEXT_LEN(&inspected),
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GRN_TEXT_VALUE(&inspected));
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GRN_OBJ_FIN(ctx, &inspected);
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GRN_API_RETURN(ctx->rc);
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}
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if (!grn_obj_is_expr(ctx, expr)) {
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grn_obj inspected;
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GRN_TEXT_INIT(&inspected, 0);
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grn_inspect(ctx, &inspected, expr);
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ERR(GRN_INVALID_ARGUMENT,
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"[table][apply-expr] expr is invalid: %.*s",
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(int)GRN_TEXT_LEN(&inspected),
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GRN_TEXT_VALUE(&inspected));
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GRN_OBJ_FIN(ctx, &inspected);
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GRN_API_RETURN(ctx->rc);
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}
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executor = grn_expr_executor_open(ctx, expr);
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if (!executor) {
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GRN_API_RETURN(ctx->rc);
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}
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GRN_TABLE_EACH_BEGIN_FLAGS(ctx, table, cursor, id, GRN_CURSOR_BY_ID) {
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grn_obj *value;
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value = grn_expr_executor_exec(ctx, executor, id);
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if (ctx->rc != GRN_SUCCESS) {
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break;
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}
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if (value) {
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grn_obj_set_value(ctx, output_column, id, value, GRN_OBJ_SET);
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}
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} GRN_TABLE_EACH_END(ctx, cursor);
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grn_expr_executor_close(ctx, executor);
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GRN_API_RETURN(ctx->rc);
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}
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grn_id
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grn_table_find_reference_object(grn_ctx *ctx, grn_obj *table)
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{
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grn_id table_id;
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grn_id reference_object_id = GRN_ID_NIL;
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GRN_API_ENTER;
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if (!grn_obj_is_table(ctx, table)) {
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GRN_API_RETURN(GRN_ID_NIL);
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}
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table_id = DB_OBJ(table)->id;
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GRN_DB_SPEC_EACH_BEGIN(ctx, cursor, id, spec) {
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if (id == table_id) {
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continue;
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}
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switch (spec->header.type) {
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case GRN_TABLE_HASH_KEY :
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case GRN_TABLE_PAT_KEY :
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case GRN_TABLE_DAT_KEY :
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if (spec->header.domain == table_id) {
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reference_object_id = id;
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}
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break;
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case GRN_COLUMN_VAR_SIZE :
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case GRN_COLUMN_FIX_SIZE :
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if (spec->header.domain == table_id) {
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break;
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}
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if (spec->range == table_id) {
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reference_object_id = id;
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}
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break;
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default :
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break;
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}
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if (reference_object_id != GRN_ID_NIL) {
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break;
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}
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} GRN_DB_SPEC_EACH_END(ctx, cursor);
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GRN_API_RETURN(reference_object_id);
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}
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