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oceanbase/src/sql/engine/expr/ob_expr_is_json.cpp
obdev c5756c1799 [FEAT MERGE] Functional_index
2023-04-27 11:11:24 +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 for json_valid.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "ob_expr_is_json.h"
#include "sql/engine/expr/ob_expr_json_func_helper.h"
#include "sql/engine/expr/ob_expr_util.h"
#include "share/object/ob_obj_cast.h"
#include "sql/engine/expr/ob_datum_cast.h"
#include "objit/common/ob_item_type.h"
#include "sql/session/ob_sql_session_info.h"
#include "lib/json_type/ob_json_tree.h"
#include "lib/hash/ob_hashset.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
namespace oceanbase
{
namespace sql
{
ObExprIsJson::ObExprIsJson(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_IS_JSON, N_IS_JSON, MORE_THAN_ONE, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{
}
ObExprIsJson::~ObExprIsJson()
{
}
int ObExprIsJson::calc_result_typeN(ObExprResType& type,
ObExprResType* types_stack,
int64_t param_num,
ObExprTypeCtx& type_ctx) const
{
UNUSED(type_ctx);
INIT_SUCC(ret);
if (OB_UNLIKELY(param_num != 5)) {
ret = OB_ERR_PARAM_SIZE;
LOG_WARN("invalid argument number", K(ret), K(param_num));
} else {
// set result type to int32
type.set_int32();
type.set_scale(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].scale_);
type.set_precision(common::ObAccuracy::DDL_DEFAULT_ACCURACY[common::ObIntType].precision_);
ObObjType in_type = types_stack[0].get_type();
if (in_type == ObNullType) {
} else if (in_type == ObJsonType) {
// do nothing
} else if (ob_is_string_type(in_type)) {
if (types_stack[0].get_collation_type() == CS_TYPE_BINARY) {
types_stack[0].set_calc_collation_type(CS_TYPE_BINARY);
} else {
if (types_stack[0].get_charset_type() != CHARSET_UTF8MB4) {
types_stack[0].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
}
}
}
}
for (uint32_t i = 1; i < param_num && OB_SUCC(ret); i++) {
if (types_stack[i].get_type() != ObIntType &&
types_stack[i].get_type() != ObNumberType) {
ret = OB_ERR_INVALID_TYPE_FOR_JSON;
LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_JSON, i + 1, N_IS_JSON);
}
}
return ret;
}
int ObExprIsJson::check_is_json(const ObExpr &expr, ObEvalCtx &ctx,
const ObDatum &data, ObObjType type,
ObCollationType cs_type, ObArenaAllocator &allocator,
uint8_t strict_opt, uint8_t scalar_opt, uint8_t unique_opt,
bool check_for_is_json, ObDatum &res)
{
INIT_SUCC(ret);
bool is_null = false;
bool is_invalid = false;
bool is_scalar = true;
ObExpr *json_arg = expr.args_[0];
if (type == ObNullType || data.is_null()) {
is_null = true;
} else {
common::ObString j_str;
if (OB_FAIL(ObJsonExprHelper::get_json_or_str_data(json_arg, ctx, allocator, j_str, is_null))) {
LOG_WARN("fail to get real data.", K(ret), K(j_str));
} else if (is_null) {
} else if (OB_UNLIKELY(j_str == "")) {
if (type == ObJsonType) {
is_null = true;
} else {
is_invalid = true;
}
} else if (type == ObJsonType) {
// do nothing
} else { // json tree
uint32_t parse_flag = 0;
ADD_FLAG_IF_NEED(strict_opt != OB_JSON_MODE_STRICT, parse_flag, ObJsonParser::JSN_RELAXED_FLAG);
ADD_FLAG_IF_NEED(unique_opt == OB_JSON_MODE_UNIQUE_KEYS, parse_flag, ObJsonParser::JSN_UNIQUE_FLAG);
if (OB_FAIL(ObJsonParser::check_json_syntax(j_str, &allocator, parse_flag))) {
LOG_WARN("fail to check json syntax", K(ret), K(type), K(j_str));
}
}
}
bool is_valid_json = !is_invalid;
if (OB_SUCC(ret)) {
if (OB_UNLIKELY(is_null)) {
res.set_null();
} else {
is_invalid = check_for_is_json ? is_invalid : !is_invalid;
res.set_int(static_cast<int64_t>(!is_invalid));
}
} else if (ret == OB_ERR_INVALID_JSON_TEXT) {
res.set_int(check_for_is_json ? 0 : 1);
is_valid_json = false;
ret = OB_SUCCESS;
} else if (ret == OB_ERR_JSON_OUT_OF_DEPTH) {
LOG_USER_ERROR(OB_ERR_JSON_OUT_OF_DEPTH);
} else if (ret == OB_ERR_DUPLICATE_KEY && unique_opt == OB_JSON_MODE_UNIQUE_KEYS) {
res.set_int(check_for_is_json ? 0 : 1);
is_valid_json = false;
ret = OB_SUCCESS;
}
// if disallow
if (OB_SUCC(ret) && is_valid_json && (scalar_opt == OB_IS_JSON_MODE_UNDEFAULT)) {
if (is_null) {
res.set_int(check_for_is_json ? 0 : 1);
} else {
bool is_null_json = false;
ObIJsonBase *json_data = NULL;
if (OB_FAIL(ObJsonExprHelper::get_json_doc(expr, ctx, allocator, 0,
json_data, is_null_json))) {
LOG_WARN("get_json_doc failed", K(ret));
} else {
// 如果is_json && scalar
if (json_data->json_type() != ObJsonNodeType::J_OBJECT
&& json_data->json_type() != ObJsonNodeType::J_ARRAY) {
res.set_int(check_for_is_json ? 0 : 1);
} // end of check scalar
} // end of get json doc
}// end of J_NULL
}
return ret;
}
int ObExprIsJson::get_is_json_option(const ObExpr &expr, ObEvalCtx &ctx, int64_t idx, uint8_t& is_json_mode)
{
INIT_SUCC(ret);
is_json_mode = 0;
ObExpr *json_arg = expr.args_[idx];
ObDatum *json_datum = NULL;
if (OB_ISNULL(json_arg)) {
ret = OB_BAD_NULL_ERROR;
LOG_WARN("null param", K(idx), K(ret));
} else {
ObObjType val_type = json_arg->datum_meta_.type_;
if (OB_FAIL(ret)) {
} else if (OB_FAIL(json_arg->eval(ctx, json_datum))) {
LOG_WARN("eval json arg failed", K(ret));
} else if (val_type == ObIntType) {
int64_t option = json_datum->get_int();
if (option < OB_IS_JSON_MODE_DEFAULT ||
option > OB_IS_JSON_MODE_MAX) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input option type error", K(option), K(ret));
} else {
is_json_mode = static_cast<uint8_t>(option);
if (is_json_mode == OB_IS_JSON_MODE_MAX) is_json_mode = OB_IS_JSON_MODE_DEFAULT;
}
} else if (val_type == ObNumberType) {
const uint32_t *option = json_datum->get_number_digits();
if (*option < OB_IS_JSON_MODE_DEFAULT ||
*option > OB_IS_JSON_MODE_MAX) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input option type error", K(option), K(ret));
} else {
is_json_mode = static_cast<uint8_t>(*option);
if (is_json_mode == OB_IS_JSON_MODE_MAX) is_json_mode = OB_IS_JSON_MODE_DEFAULT;
}
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input type error", K(val_type), K(ret));
}
}
return ret;
}
int ObExprIsJson::eval_is_json(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
{
INIT_SUCC(ret);
ObExpr *json_arg = expr.args_[1];
ObDatum *json_datum = NULL;
ObObjType val_type = json_arg->datum_meta_.type_;
uint8_t strict_opt = 0;
uint8_t scalar_opt = 0;
uint8_t unique_opt = 0;
// check if is json or not
bool check_for_is_json = false;
if (OB_FAIL(json_arg->eval(ctx, json_datum))) {
LOG_WARN("eval json arg failed", K(ret));
} else if (val_type == ObIntType) {
int64_t option = json_datum->get_int();
if (option == 0) {
check_for_is_json = false;
} else if (option == 1) {
check_for_is_json = true;
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input option error", K(option), K(ret));
}
} else if (val_type == ObNumberType) {
const uint32_t *option = json_datum->get_number_digits();
if (*option == 0) {
check_for_is_json = false;
} else if (*option == 1) {
check_for_is_json = true;
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input option error", K(*option), K(ret));
}
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("input type error", K(val_type), K(ret));
}
// check option for is_json
// get strict_opt
if (OB_SUCC(ret)) {
if (OB_FAIL(get_is_json_option(expr, ctx, 2, strict_opt))) {
LOG_WARN("input strict option error", K(ret));
}
}
// get scalar_opt
if (OB_SUCC(ret)) {
if (OB_FAIL(get_is_json_option(expr, ctx, 3, scalar_opt))) {
LOG_WARN("input scalar option error", K(ret));
}
}
// get unique_opt
if (OB_SUCC(ret)) {
if (OB_FAIL(get_is_json_option(expr, ctx, 4, unique_opt))) {
LOG_WARN("input unique option error", K(ret));
}
}
// check json_doc is json or not
json_arg = expr.args_[0];
ObCollationType cs_type = json_arg->datum_meta_.cs_type_;
if (OB_FAIL(ret)) {
} else if (OB_FAIL(json_arg->eval(ctx, json_datum))) {
LOG_WARN("eval json arg failed", K(ret));
} else {
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
if (OB_FAIL(check_is_json(expr, ctx, *json_datum,
json_arg->datum_meta_.type_,
cs_type, temp_allocator,
strict_opt, scalar_opt, unique_opt,
check_for_is_json, res))) {
LOG_WARN("fail to do checks whether is json", K(ret), K(json_arg->datum_meta_.type_));
}
}
return ret;
}
int ObExprIsJson::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_is_json;
return OB_SUCCESS;
}
}
}
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