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oceanbase/src/sql/engine/expr/ob_expr_json_object.cpp

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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 "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);
ObSQLSessionInfo *session = const_cast<ObSQLSessionInfo *>(type_ctx.get_session());
ObExecContext *exec_ctx = nullptr;
if (OB_ISNULL(session)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is NULL", K(ret));
} else if (lib::is_mysql_mode() && OB_ISNULL(exec_ctx = session->get_cur_exec_ctx())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("exec context is NULL", K(ret));
} else 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_mysql_mode() && exec_ctx->is_ps_prepare_stage()) {
// the ps prepare stage does not do type deduction, and directly gives a default type.
type.set_json();
type.set_length((ObAccuracy::DDL_DEFAULT_ACCURACY[ObJsonType]).get_length());
} 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))) {
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());
for (int64_t i = 0; OB_SUCC(ret) && 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(j_base->get_raw_binary(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 res_str(&temp_allocator);
ObObjType val_type;
ObCollationType value_cs_type;
uint8_t format_type = OB_JSON_ON_STRICT_IMPLICIT;
bool is_column = false;
common::hash::ObHashSet<ObString> view_key_names;
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)) {
ret = get_clause(expr, ctx, expr.arg_cnt_ - 4, null_type, OB_JSON_ON_NULL_NUM);
}
// parse returning type
ObObjType dst_type;
int32_t dst_len = OB_MAX_TEXT_LENGTH;
if (OB_SUCC(ret)) {
ret = ObJsonExprHelper::get_dest_type(expr, expr.arg_cnt_ - 3, ctx, dst_type, dst_len);
}
// parse strict type
uint8_t strict_type = OB_JSON_ON_STRICT_IMPLICIT;
if (OB_SUCC(ret)) {
ret = get_clause(expr, ctx, expr.arg_cnt_ - 2, strict_type, OB_JSON_ON_STRICT_NUM);
}
// parse unique type
uint8_t unique_type = OB_JSON_ON_UNIQUE_IMPLICIT;
if (OB_SUCC(ret)) {
ret = get_clause(expr, ctx, expr.arg_cnt_ - 1, unique_type, OB_JSON_ON_UNIQUE_NUM);
}
if (OB_FAIL(res_str.append("{"))) {
LOG_WARN("symbol write fail");
}
int64_t size_set= (expr.arg_cnt_ - 4) / 3;
int64_t bucket_num = (size_set / 2) + 1;
if (size_set > 0 && OB_FAIL(view_key_names.create(bucket_num))) {
LOG_WARN("init hash failed", K(ret), K(bucket_num));
}
for (int32 i = 0; OB_SUCC(ret) && i < expr.arg_cnt_ - 4; i += 3) {
ObExpr *arg = expr.args_[i];
ObDatum *json_datum = NULL;
ObObjType key_type = expr.args_[i]->datum_meta_.type_;
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 if (!ob_is_string_type(key_type) && key_type != ObJsonType) {
ret = OB_ERR_INVALID_TYPE_FOR_OP;
}
if (OB_SUCC(ret)) {
ret = get_clause(expr, ctx, i + 2, format_type, OB_JSON_ON_STRICT_NUM);
}
ObExpr *val_expr = expr.args_[i + 1];
val_type = val_expr->datum_meta_.type_;
bool can_only_be_null = false;
if (OB_SUCC(ret) && format_type
&& (!ObJsonExprHelper::is_convertible_to_json(val_type) || val_type == ObJsonType)) {
if (val_type == ObObjType::ObNumberType) {
can_only_be_null = true;
} else {
ret = OB_ERR_INVALID_TYPE_FOR_OP;
LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_OP, "CHAR", ob_obj_type_str(val_type));
}
}
if (OB_SUCC(ret)) {
ObString key = json_datum->get_string();
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 (dst_type == ObJsonType) {
ObIJsonBase *j_val = NULL;
uint32_t parse_flag = (strict_type == OB_JSON_ON_STRICT_IMPLICIT) ?
ObJsonParser::JSN_STRICT_FLAG : ObJsonParser::JSN_RELAXED_FLAG;
if (OB_FAIL(ObJsonExprHelper::get_json_val(expr, ctx, &temp_allocator, i+1, j_val, false, format_type, parse_flag))) {
ret = OB_ERR_INVALID_JSON_TEXT_IN_PARAM;
LOG_USER_ERROR(OB_ERR_INVALID_JSON_TEXT_IN_PARAM);
} else if (can_only_be_null && j_val->json_type() != ObJsonNodeType::J_NULL) {
ret = OB_ERR_INVALID_TYPE_FOR_OP;
LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_OP, "CHAR", ob_obj_type_str(val_type));
} else if (j_val->json_type() == ObJsonNodeType::J_NULL && null_type == OB_JSON_ON_NULL_ABSENT) {
ObString key = json_datum->get_string();
if (unique_type == OB_JSON_ON_UNIQUE_USE && OB_FAIL(check_key_valid(view_key_names, key))) {
LOG_WARN("duplicate key fail");
}
// do nothing
} else if (OB_FAIL(check_key_valid(view_key_names, key))) {
LOG_WARN("duplicate key fail");
} else if (OB_FAIL(j_base->object_add(key, j_val))) {
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));
}
} else {
ObJsonString ob_str(key.ptr(), key.length());
ObDatum *j_datum = NULL;
bool t_is_null = false;
if (OB_FAIL(get_ora_json_doc(expr, ctx, i+1, j_datum, t_is_null))) {
LOG_WARN("get value json doc fail", K(ret), K(j_datum));
} else if (can_only_be_null && !t_is_null) {
ret = OB_ERR_INVALID_TYPE_FOR_OP;
LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_OP, "CHAR", ob_obj_type_str(val_type));
} else if (t_is_null && null_type == OB_JSON_ON_NULL_ABSENT) {
ObString key = json_datum->get_string();
if (unique_type == OB_JSON_ON_UNIQUE_USE && OB_FAIL(check_key_valid(view_key_names, key))) {
LOG_WARN("duplicate key fail");
}
// do nothing only check
} else if (t_is_null && null_type <= 1) {
if (OB_SUCC(ret) && i > 0 && res_str.length() > 1) {
if (OB_FAIL(res_str.append(","))) {
LOG_WARN("comma write fail");
}
}
if (OB_SUCC(ret)) {
if (unique_type == OB_JSON_ON_UNIQUE_USE && OB_FAIL(check_key_valid(view_key_names, key))) {
LOG_WARN("duplicate key fail");
} else if (OB_FAIL(ob_str.print(res_str, true))) {
LOG_WARN("fail to print json node", K(ret));
} else if (OB_FAIL(res_str.append(":"))) {
LOG_WARN("colon write fail");
} else if (OB_FAIL(res_str.append("null"))) {
LOG_WARN("null write fail");
}
}
} else {
if (OB_SUCC(ret) && i > 0 && res_str.length() > 1) {
if (res_str.append(",")) {
LOG_WARN("comma write fail");
}
}
if (OB_SUCC(ret)) {
if (unique_type == OB_JSON_ON_UNIQUE_USE && OB_FAIL(check_key_valid(view_key_names, key))) {
LOG_WARN("duplicate key fail");
} else if (OB_FAIL(ob_str.print(res_str, true))) {
LOG_WARN("fail to print json node", K(ret));
} else if (OB_FAIL(res_str.append(":"))) {
LOG_WARN("colon write fail");
}
}
if (OB_SUCC(ret)) {
value_cs_type = expr.args_[i + 1]->datum_meta_.cs_type_;
if (ObJsonExprHelper::is_convertible_to_json(val_type) || ob_is_raw(val_type)) {
if (OB_FAIL(ObJsonExprHelper::transform_convertible_2String(*expr.args_[i + 1], ctx, *j_datum,
val_type, value_cs_type, res_str,
expr.args_[i + 1]->obj_meta_.has_lob_header(), format_type,
strict_type == OB_JSON_ON_STRICT_USE, i + 1))) {
LOG_WARN("fail to transfrom to string");
}
} else {
ObScale scale = expr.args_[i + 1]->datum_meta_.scale_;
const ObTimeZoneInfo *tz_info = get_timezone_info(ctx.exec_ctx_.get_my_session());
if (OB_FAIL(ObJsonExprHelper::transform_scalar_2String(ctx, *j_datum, val_type, scale, tz_info, res_str))) {
LOG_WARN("Fail to transformer string");
}
}
}
if (OB_SUCC(ret) && res_str.length() > OB_MAX_PACKET_LENGTH) {
ret = OB_ERR_TOO_LONG_STRING_IN_CONCAT;
LOG_WARN("result of json_objectagg is too long", K(ret), K(res_str.length()),
K(OB_MAX_PACKET_LENGTH));
}
}
}
}
}
if (OB_FAIL(ret)) {
LOG_WARN("return value fail", K(ret));
} else if (OB_FAIL(res_str.append("}"))) {
LOG_WARN("symbol write fail");
} else {
if (dst_type == ObJsonType) {
ObString raw_bin;
if (OB_FAIL(j_base->get_raw_binary(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 {
if (dst_type == ObVarcharType && res_str.string().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 {
ret = set_result(dst_type, res_str.string(), &temp_allocator, ctx, expr, res, strict_type, unique_type);
}
}
}
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::get_clause(const ObExpr &expr,
ObEvalCtx &ctx,
uint8_t index,
uint8_t &type,
int64_t size_para)
{
INIT_SUCC(ret);
ObExpr *json_arg = expr.args_[index];
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;
}
} // sql
} // oceanbase
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