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oceanbase/src/sql/engine/expr/ob_expr_json_object.cpp
shadowao 4afa70a218 [FEAT MERGE] JSON/XML phase2 and JSON Partial Update 
Co-authored-by: Carrot-77 <1012982871@qq.com>
Co-authored-by: wu-xingying <729224612@qq.com>
2024-04-12 10:46:02 +00:00

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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
* This file contains implementation of json_object.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "ob_expr_json_object.h"
#include "sql/engine/expr/ob_expr_json_func_helper.h"
#include "sql/engine/ob_exec_context.h"
#include "sql/engine/expr/ob_expr_cast.h"
#include "share/ob_json_access_utils.h"
#include "lib/hash/ob_hashset.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
namespace oceanbase
{
namespace sql
{
ObExprJsonObject::ObExprJsonObject(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_JSON_OBJECT, N_JSON_OBJECT, OCCUR_AS_PAIR, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{
}
ObExprJsonObject::~ObExprJsonObject()
{
}
int ObExprJsonObject::calc_result_typeN(ObExprResType& type,
ObExprResType* types_stack,
int64_t param_num,
ObExprTypeCtx& type_ctx) const
{
INIT_SUCC(ret);
if (OB_UNLIKELY(param_num < 0
|| (lib::is_mysql_mode() && param_num % 2 != 0
|| (lib::is_oracle_mode() && param_num < 4)))) {
ret = OB_ERR_PARAM_SIZE;
const ObString name = "json_object";
LOG_USER_ERROR(OB_ERR_PARAM_SIZE, name.length(), name.ptr());
} else if (lib::is_oracle_mode()) {
// type.set_json();
for (int64_t i = 0; OB_SUCC(ret) && i < param_num - 4; i += 3) {
if ((types_stack[i].get_type() == ObNullType)) {
ret = OB_ERR_JSON_DOCUMENT_NULL_KEY;
LOG_USER_ERROR(OB_ERR_JSON_DOCUMENT_NULL_KEY);
} else if (types_stack[i].get_type() != ObCharType
&& types_stack[i].get_type() != ObVarcharType
&& types_stack[i].get_type() != ObNCharType
&& types_stack[i].get_type() != ObNVarchar2Type) {
ret = OB_ERR_INVALID_TYPE_FOR_OP;
LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_OP, ob_obj_type_str(types_stack[i].get_type()), "CHAR");
} else if (ob_is_string_type(types_stack[i].get_type())) {
if (types_stack[i].get_charset_type() == CHARSET_BINARY) {
ret = OB_ERR_INVALID_JSON_CHARSET;
LOG_USER_ERROR(OB_ERR_INVALID_JSON_CHARSET);
} else if (types_stack[i].get_charset_type() != CHARSET_UTF8MB4) {
types_stack[i].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
} else {
types_stack[i].set_calc_type(ObCharType);
types_stack[i].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
if (OB_SUCC(ret)) {
ObObjType doc_type = types_stack[i + 1].get_type();
if (types_stack[i + 1].get_type() == ObNullType) {
} else if (ob_is_string_type(doc_type)) {
if (types_stack[i + 1].get_collation_type() == CS_TYPE_BINARY) {
if (lib::is_mysql_mode()) {
// unsuport string type with binary charset
ret = OB_ERR_INVALID_JSON_CHARSET;
LOG_WARN("Unsupport for string type with binary charset input.", K(ret), K(doc_type));
} else {
types_stack[i + 1].set_calc_collation_type(CS_TYPE_BINARY);
}
} else if (types_stack[i + 1].get_charset_type() != CHARSET_UTF8MB4) {
types_stack[i + 1].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
} else if (doc_type == ObJsonType) {
types_stack[i + 1].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
} else {
types_stack[i + 1].set_calc_type(types_stack[i + 1].get_type());
types_stack[i + 1].set_calc_collation_type(types_stack[i + 1].get_collation_type());
}
}
if (OB_SUCC(ret)) {
if (types_stack[i + 2].get_type() == ObNullType) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("<format type> param type is unexpected", K(types_stack[i + 2].get_type()), K(ret));
} else if (types_stack[i + 2].get_type() != ObIntType) {
types_stack[i + 2].set_calc_type(ObIntType);
}
}
}
// null type : param_num - 4
if (OB_SUCC(ret)) {
if (types_stack[param_num - 4].get_type() == ObNullType) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("<empty type> param type is unexpected", K(types_stack[param_num - 4].get_type()), K(ret));
} else if (types_stack[param_num - 4].get_type() != ObIntType) {
types_stack[param_num - 4].set_calc_type(ObIntType);
}
}
// returning type : param_num - 3
ObExprResType dst_type;
if (OB_SUCC(ret)) {
if (OB_FAIL(ObJsonExprHelper::get_cast_type(types_stack[param_num - 3], dst_type, type_ctx))) {
LOG_WARN("get cast dest type failed", K(ret));
} else if (OB_FAIL(ObJsonExprHelper::set_dest_type(types_stack[param_num - 3], type, dst_type, type_ctx))) {
LOG_WARN("set dest type failed", K(ret));
} else {
type.set_calc_collation_type(type.get_collation_type());
}
}
// strict type : param_num - 2,
if (OB_SUCC(ret)) {
if (types_stack[param_num - 2].get_type() == ObNullType) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("<empty type> param type is unexpected", K(types_stack[param_num - 2].get_type()), K(ret));
} else if (types_stack[param_num - 2].get_type() != ObIntType) {
types_stack[param_num - 2].set_calc_type(ObIntType);
}
}
// with unique keys type : param_num - 1,
if (OB_SUCC(ret)) {
if (types_stack[param_num - 1].get_type() == ObNullType) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("<empty type> param type is unexpected", K(types_stack[param_num - 1].get_type()), K(ret));
} else if (types_stack[param_num - 1].get_type() != ObIntType) {
types_stack[param_num - 1].set_calc_type(ObIntType);
}
}
} else {
type.set_json();
type.set_length((ObAccuracy::DDL_DEFAULT_ACCURACY[ObJsonType]).get_length());
ObSQLSessionInfo *session = const_cast<ObSQLSessionInfo *>(type_ctx.get_session());
ObExecContext* ctx = nullptr;
bool is_deduce_input = true;
if (OB_NOT_NULL(session)) {
is_deduce_input = (!session->is_varparams_sql_prepare());
}
for (int64_t i = 0; OB_SUCC(ret) && is_deduce_input && i < param_num; i += 2) {
if ((types_stack[i].get_type() == ObNullType)) {
ret = OB_ERR_JSON_DOCUMENT_NULL_KEY;
LOG_USER_ERROR(OB_ERR_JSON_DOCUMENT_NULL_KEY);
} else if (ob_is_string_type(types_stack[i].get_type())) {
if (types_stack[i].get_charset_type() == CHARSET_BINARY) {
ret = OB_ERR_INVALID_JSON_CHARSET;
LOG_USER_ERROR(OB_ERR_INVALID_JSON_CHARSET);
} else if (types_stack[i].get_charset_type() != CHARSET_UTF8MB4) {
types_stack[i].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
} else {
types_stack[i].set_calc_type(ObLongTextType);
types_stack[i].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
if (OB_SUCC(ret)) {
if (ob_is_string_type(types_stack[i+1].get_type())) {
if (types_stack[i+1].get_charset_type() != CHARSET_UTF8MB4) {
types_stack[i+1].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
} else if (types_stack[i+1].get_type() == ObJsonType) {
types_stack[i+1].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
}
}
}
return ret;
}
// for new sql engine
int ObExprJsonObject::eval_json_object(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
{
INIT_SUCC(ret);
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
ObJsonObject j_obj(&temp_allocator);
ObIJsonBase *j_base = &j_obj;
if (expr.datum_meta_.cs_type_ != CS_TYPE_UTF8MB4_BIN) {
ret = OB_ERR_INVALID_JSON_CHARSET;
LOG_WARN("invalid out put charset", K(ret), K(expr.datum_meta_.cs_type_));
}
for (int32 i = 0; OB_SUCC(ret) && i < expr.arg_cnt_; i += 2) {
ObExpr *arg = expr.args_[i];
ObDatum *json_datum = NULL;
if (OB_FAIL(arg->eval(ctx, json_datum))) {
LOG_WARN("failed: eval json args datum failed", K(ret));
} else if (json_datum->is_null()) {
ret = OB_ERR_JSON_DOCUMENT_NULL_KEY;
LOG_USER_ERROR(OB_ERR_JSON_DOCUMENT_NULL_KEY);
LOG_WARN("failed:json key is null", K(ret));
} else {
ObString key = json_datum->get_string();
ObIJsonBase *j_val = NULL;
bool is_null = false;
if (OB_FAIL(ObJsonExprHelper::get_json_or_str_data(arg, ctx, temp_allocator, key, is_null))) {
LOG_WARN("fail to get real data.", K(ret), K(key));
} else if (OB_FAIL(ObJsonExprHelper::get_json_val(expr, ctx, &temp_allocator, i+1, j_val))) {
ret = OB_ERR_INVALID_JSON_TEXT_IN_PARAM;
LOG_USER_ERROR(OB_ERR_INVALID_JSON_TEXT_IN_PARAM);
} else if (OB_FAIL(j_obj.add(key, static_cast<ObJsonNode*>(j_val), false, true, false))) {
if (ret == OB_ERR_JSON_DOCUMENT_NULL_KEY) {
LOG_USER_ERROR(OB_ERR_JSON_DOCUMENT_NULL_KEY);
}
LOG_WARN("failed: append json object kv", K(ret));
}
}
}
if (OB_SUCC(ret)) {
ObString raw_bin;
j_obj.stable_sort();
j_obj.unique();
if (OB_FAIL(ObJsonWrapper::get_raw_binary(j_base, raw_bin, &temp_allocator))) {
LOG_WARN("failed: get json raw binary", K(ret));
} else if (OB_FAIL(ObJsonExprHelper::pack_json_str_res(expr, ctx, res, raw_bin))) {
LOG_WARN("fail to pack json result", K(ret));
}
}
return ret;
}
int ObExprJsonObject::eval_ora_json_object(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
{
INIT_SUCC(ret);
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
ObJsonBuffer string_buffer(&temp_allocator);
ObObjType val_type;
ObCollationType value_cs_type;
bool is_column = false;
ObJsonObject j_obj(&temp_allocator);
ObIJsonBase *j_base = &j_obj;
ObJsonBuffer jbuf(&temp_allocator);
// parse null type
uint8_t null_type = OB_JSON_ON_NULL_IMPLICIT;
if (OB_SUCC(ret)
&& OB_FAIL(eval_option_clause_value(expr.args_[expr.arg_cnt_ - 4], ctx, null_type, OB_JSON_ON_NULL_NUM))) {
LOG_WARN("fail to eval option", K(ret), K(expr.arg_cnt_));
}
// parse returning type
ObObjType dst_type;
int32_t dst_len = OB_MAX_TEXT_LENGTH;
int64_t opt_res_type = 0;
ObDatum *datum_res_type = nullptr;
if (OB_FAIL(ret)) {
} else if (OB_UNLIKELY(OB_FAIL(expr.args_[expr.arg_cnt_ - 3]->eval(ctx, datum_res_type)))) {
LOG_WARN("eval json arg failed", K(ret));
} else {
opt_res_type = datum_res_type->get_int();
if (opt_res_type == 0) {
dst_type = ObJsonType;
} else if (OB_FAIL(ObJsonExprHelper::eval_and_check_res_type(opt_res_type, dst_type, dst_len))) {
LOG_WARN("fail to check returning type", K(ret));
}
}
// parse strict type
uint8_t strict_type = OB_JSON_ON_STRICT_IMPLICIT;
if (OB_SUCC(ret)
&& OB_FAIL(eval_option_clause_value(expr.args_[expr.arg_cnt_ - 2], ctx, strict_type, OB_JSON_ON_STRICT_NUM))) {
LOG_WARN("fail to eval option", K(ret), K(expr.arg_cnt_));
}
// parse unique type
uint8_t unique_type = OB_JSON_ON_UNIQUE_IMPLICIT;
if (OB_SUCC(ret)
&& OB_FAIL(eval_option_clause_value(expr.args_[expr.arg_cnt_ - 1], ctx, unique_type, OB_JSON_ON_UNIQUE_NUM))) {
LOG_WARN("fail to eval option", K(ret), K(expr.arg_cnt_));
}
bool is_strict = (strict_type == OB_JSON_ON_STRICT_USE);
bool is_null_absent = (null_type == OB_JSON_ON_NULL_ABSENT);
bool is_key_unique = (unique_type == OB_JSON_ON_UNIQUE_USE || (dst_type == ObJsonType && opt_res_type > 0));
for (int32 i = 0; OB_SUCC(ret) && i < expr.arg_cnt_ - 4; i += 3) {
uint8_t format_type = OB_JSON_ON_STRICT_IMPLICIT;
ObExpr *arg_key = expr.args_[i];
ObExpr *arg_value = expr.args_[i + 1];
ObExpr *arg_opt = expr.args_[i + 2];
ObObjType key_data_type = arg_key->datum_meta_.type_;
ObObjType value_data_type = arg_value->datum_meta_.type_;
ObDatum *datum_key = nullptr;
if (OB_FAIL(arg_key->eval(ctx, datum_key))) {
LOG_WARN("failed: eval json args datum failed", K(ret));
} else if (datum_key->is_null() || key_data_type == ObNullType) {
ret = OB_ERR_JSON_DOCUMENT_NULL_KEY;
LOG_USER_ERROR(OB_ERR_JSON_DOCUMENT_NULL_KEY);
} else if (!(ob_is_extend(key_data_type)
|| ob_is_json(key_data_type)
|| ob_is_raw(key_data_type)
|| ob_is_string_type(key_data_type))) {
ret = OB_ERR_INVALID_TYPE_FOR_OP;
LOG_WARN("data type not legal for key type", K(ret), K(i), K(key_data_type));
} else if ((!ob_is_string_type(key_data_type) && key_data_type != ObJsonType)) {
ret = OB_ERR_INVALID_TYPE_FOR_OP;
LOG_WARN("data type not legal for key type", K(ret), K(i), K(key_data_type));
} else if (OB_FAIL(eval_option_clause_value(arg_opt, ctx, format_type, OB_JSON_ON_STRICT_NUM))) {
LOG_WARN("fail to eval option", K(ret), K(i));
} else {
ObIJsonBase *j_val = nullptr;
ObString key = datum_key->get_string();
bool is_format_json = format_type > 0;
if (OB_FAIL(ObJsonExprHelper::eval_oracle_json_val(
arg_value, ctx, &temp_allocator, j_val, is_format_json, is_strict, false, is_null_absent))) {
LOG_WARN("failed to get json value node.", K(ret), K(value_data_type), K(i));
} else {
bool is_key_already_exist = (j_obj.get_value(key) != nullptr);
bool is_overwrite = (is_key_unique || dst_type == ObJsonType);
if (is_key_already_exist && is_key_unique) {
ret = OB_ERR_DUPLICATE_KEY;
LOG_WARN("Found duplicate key inserted before!", K(key), K(ret));
} else if (OB_ISNULL(j_val)) {
} else if (OB_FAIL(j_obj.add(key, static_cast<ObJsonNode*>(j_val), false, false, is_overwrite))) {
LOG_WARN("failed to get json value node.", K(ret), K(val_type));
}
}
}
}
if (OB_SUCC(ret)) {
if (dst_type == ObJsonType) {
ObString raw_bin;
if (OB_FAIL(ObJsonWrapper::get_raw_binary(j_base, raw_bin, &temp_allocator))) {
LOG_WARN("failed: get json raw binary", K(ret));
} else if (OB_FAIL(ObJsonExprHelper::pack_json_str_res(expr, ctx, res, raw_bin))) {
LOG_WARN("fail to pack json result", K(ret), K(raw_bin));
}
} else {
ObString temp_str;
ObString result_str;
if (OB_FAIL(string_buffer.reserve(j_obj.get_serialize_size()))) {
LOG_WARN("fail to reserve string.", K(ret), K(j_obj.get_serialize_size()));
} else if (OB_FAIL(j_base->print(string_buffer, false, false))) {
LOG_WARN("fail to transform to string.", K(ret), K(string_buffer.length()));
} else {
ObCollationType in_cs_type = CS_TYPE_UTF8MB4_BIN;
ObCollationType dst_cs_type = expr.obj_meta_.get_collation_type();
temp_str = string_buffer.string();
result_str = temp_str;
if (OB_FAIL(ObJsonExprHelper::convert_string_collation_type(in_cs_type,
dst_cs_type,
&temp_allocator,
temp_str,
result_str))) {
LOG_WARN("fail to convert string result", K(ret));
}
}
if (dst_type == ObVarcharType && result_str.length() > dst_len) {
char res_ptr[OB_MAX_DECIMAL_PRECISION] = {0};
if (OB_ISNULL(ObCharset::lltostr(dst_len, res_ptr, 10, 1))) {
LOG_WARN("dst_len fail to string.", K(ret));
}
ret = OB_OPERATE_OVERFLOW;
LOG_USER_ERROR(OB_OPERATE_OVERFLOW, res_ptr, "json_object");
} else if (OB_FAIL(ObJsonExprHelper::pack_json_str_res(expr, ctx, res, result_str))) {
LOG_WARN("fail to pack json result", K(ret));
}
}
}
return ret;
}
int ObExprJsonObject::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(expr_cg_ctx);
UNUSED(raw_expr);
if (lib::is_oracle_mode()) {
rt_expr.eval_func_ = eval_ora_json_object;
} else {
rt_expr.eval_func_ = eval_json_object;
}
return OB_SUCCESS;
}
int ObExprJsonObject::check_key_valid(common::hash::ObHashSet<ObString> &view_key_names, const ObString &key_name)
{
INIT_SUCC(ret);
if (OB_HASH_EXIST == view_key_names.exist_refactored(key_name)) {
ret = OB_ERR_DUPLICATE_KEY;
LOG_WARN("duplicate key", K(ret));
} else if (OB_FAIL(view_key_names.set_refactored(key_name, 0))) {
LOG_WARN("store key to vector failed", K(ret), K(view_key_names.size()));
}
return ret;
}
int ObExprJsonObject::set_result(ObObjType dst_type, ObString str_res, common::ObIAllocator *allocator, ObEvalCtx &ctx, const ObExpr &expr, ObDatum &res, uint8_t strict_type, uint8_t unique_type) {
INIT_SUCC(ret);
if (dst_type == ObVarcharType || dst_type == ObLongTextType) {
if (strict_type == OB_JSON_ON_STRICT_USE && OB_FAIL(ObJsonParser::check_json_syntax(str_res, allocator, ObJsonParser::JSN_STRICT_FLAG))) {
ret = OB_ERR_JSON_SYNTAX_ERROR;
LOG_WARN("fail to parse json text strict", K(ret));
} else if (OB_FAIL(ObJsonExprHelper::pack_json_str_res(expr, ctx, res, str_res))) {
LOG_WARN("fail to pack json result", K(ret));
}
} else {
ret = OB_ERR_INVALID_DATA_TYPE_RETURNING;
LOG_USER_ERROR(OB_ERR_INVALID_DATA_TYPE_RETURNING);
}
return ret;
}
int ObExprJsonObject::get_ora_json_doc(const ObExpr &expr, ObEvalCtx &ctx,
uint16_t index, ObDatum*& j_datum,
bool &is_null)
{
INIT_SUCC(ret);
ObExpr *json_arg = expr.args_[index];
j_datum = NULL;
ObObjType val_type = json_arg->datum_meta_.type_;
if (OB_UNLIKELY(OB_FAIL(json_arg->eval(ctx, j_datum)))) {
LOG_WARN("eval json arg failed", K(ret), K(val_type));
} else if (j_datum->is_null()) {
is_null = true;
}
return ret;
}
int ObExprJsonObject::eval_option_clause_value(ObExpr *expr,
ObEvalCtx &ctx,
uint8_t &type,
int64_t size_para)
{
INIT_SUCC(ret);
ObExpr *json_arg = expr;
ObObjType val_type = json_arg->datum_meta_.type_;
ObDatum *json_datum = NULL;
if (OB_FAIL(json_arg->eval(ctx, json_datum))) {
LOG_WARN("eval json arg failed", K(ret));
} else if (val_type != ObIntType) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input type error", K(val_type));
} else {
int64_t option_type = json_datum->get_int();
if (option_type < 0 ||
option_type >= size_para) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input option type error", K(option_type));
} else {
type = static_cast<uint8_t>(option_type);
}
}
return ret;
}
ObExprJsonObjectStar::ObExprJsonObjectStar(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_JSON_OBJECT_WILD_STAR, N_JSON_OBJECT_STAR, OCCUR_AS_PAIR, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{
}
ObExprJsonObjectStar::~ObExprJsonObjectStar()
{
}
int ObExprJsonObjectStar::calc_result_typeN(ObExprResType& type,
ObExprResType* types_stack,
int64_t param_num,
ObExprTypeCtx& type_ctx) const
{
INIT_SUCC(ret);
if (param_num != 1) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("incorrect num of param", K(ret));
} else {
types_stack[0].set_calc_type(types_stack[0].get_type());
types_stack[0].set_calc_collation_type(types_stack[0].get_collation_type());
ObExprResType dst_type;
dst_type.set_type(ObObjType::ObVarcharType);
dst_type.set_collation_type(CS_TYPE_UTF8MB4_BIN);
dst_type.set_full_length(4000, 1);
if (OB_FAIL(ObJsonExprHelper::set_dest_type(types_stack[0], type, dst_type, type_ctx))) {
LOG_WARN("set dest type failed", K(ret));
} else {
type.set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
}
return ret;
}
int ObExprJsonObjectStar::eval_ora_json_object_star(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
{
INIT_SUCC(ret);
ret = OB_ERR_UNEXPECTED;
LOG_WARN("can not be use this expr, should transform to real column", K(ret));
return ret;
}
int ObExprJsonObjectStar::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
ObExpr &rt_expr) const
{
UNUSED(expr_cg_ctx);
UNUSED(raw_expr);
rt_expr.eval_func_ = eval_ora_json_object_star;
return OB_SUCCESS;
}
} // sql
} // oceanbase
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