96 lines
2.8 KiB
C++
96 lines
2.8 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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* This file contains implementation for json_depth.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_json_func_helper.h"
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#include "ob_expr_json_depth.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprJsonDepth::ObExprJsonDepth(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_JSON_DEPTH, N_JSON_DEPTH, 1, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprJsonDepth::~ObExprJsonDepth()
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{
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}
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int ObExprJsonDepth::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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INIT_SUCC(ret);
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type.set_int32();
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type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].scale_);
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type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
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if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(type1, 1, N_JSON_DEPTH))) {
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LOG_WARN("wrong type for json doc.", K(ret), K(type1.get_type()));
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}
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return ret;
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}
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int ObExprJsonDepth::eval_json_depth(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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// get json doc
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INIT_SUCC(ret);
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ObDatum *json_datum = NULL;
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ObExpr *json_arg = expr.args_[0];
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ObObjType val_type = json_arg->datum_meta_.type_;
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ObIJsonBase *json_doc = NULL;
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bool is_null_result = false;
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ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
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common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
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if (OB_FAIL(json_arg->eval(ctx, json_datum))) {
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LOG_WARN("eval json arg failed", K(ret));
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} else if (val_type == ObNullType || json_datum->is_null()) {
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is_null_result = true;
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} else if (OB_FAIL(ObJsonExprHelper::get_json_doc(expr, ctx, temp_allocator, 0,
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json_doc, is_null_result))) {
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LOG_WARN("get_json_doc failed", K(ret));
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} else {
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// do nothing
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}
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// set result
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if (OB_FAIL(ret)) {
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LOG_WARN("json_depth failed", K(ret));
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} else if (is_null_result) {
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res.set_null();
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} else {
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res.set_int32(json_doc->depth());
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}
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return ret;
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}
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int ObExprJsonDepth::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
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{
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UNUSED(expr_cg_ctx);
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UNUSED(raw_expr);
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rt_expr.eval_func_ = eval_json_depth;
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return OB_SUCCESS;
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}
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}
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} |