256 lines
9.6 KiB
C++
256 lines
9.6 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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*/
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// This file is for implement of func json_array_array_insert
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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_json_array_insert.h"
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#include "sql/engine/expr/ob_expr_json_func_helper.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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ObExprJsonArrayInsert::ObExprJsonArrayInsert(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc,
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T_FUN_SYS_JSON_ARRAY_INSERT,
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N_JSON_ARRAY_INSERT,
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MORE_THAN_TWO,
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NOT_ROW_DIMENSION)
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{
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}
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ObExprJsonArrayInsert::~ObExprJsonArrayInsert()
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{
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}
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int ObExprJsonArrayInsert::calc_result_typeN(ObExprResType& type, ObExprResType* types_stack,
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int64_t param_num, 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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// param_num is odd, JSON_ARRAY_INSERT(json_doc, path, val[, path, val] ...)
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if (OB_UNLIKELY(param_num <= 1 || (param_num & 1 ) == 0)) {
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ret = OB_ERR_PARAM_SIZE;
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const ObString name("json_array_insert");
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LOG_USER_ERROR(OB_ERR_PARAM_SIZE, name.length(), name.ptr());
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} else {
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type.set_json();
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type.set_length((ObAccuracy::DDL_DEFAULT_ACCURACY[ObJsonType]).get_length());
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if (OB_FAIL(ObJsonExprHelper::is_valid_for_json(types_stack, 0, N_JSON_ARRAY_INSERT))) {
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LOG_WARN("wrong type for json doc.", K(ret), K(types_stack[0].get_type()));
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} else {
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for (int64_t i = 1; OB_SUCC(ret) && i < param_num; i += 2) {
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//path type
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if (OB_FAIL(ObJsonExprHelper::is_valid_for_path(types_stack, i))) {
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LOG_WARN("wrong type for json path.", K(ret), K(types_stack[i].get_type()));
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}
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if (OB_SUCC(ret)) {
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// value type
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if (types_stack[i+1].get_type() == ObNullType) {
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// do nothing
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} else if (ob_is_string_type(types_stack[i+1].get_type())) {
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if (types_stack[i+1].get_charset_type() != CHARSET_UTF8MB4) {
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types_stack[i+1].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
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}
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} else if (types_stack[i+1].get_type() == ObJsonType) {
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types_stack[i+1].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
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}
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}
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}
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}
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}
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return ret;
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}
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int ObExprJsonArrayInsert::calc_resultN(ObObj &result, const ObObj *objs, int64_t param_num, ObExprCtx &expr_ctx) const
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{
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INIT_SUCC(ret);
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ObIAllocator *allocator = expr_ctx.calc_buf_;
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ObIJsonBase *j_base = NULL;
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bool is_null = false;
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ObJsonBaseVector hit;
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if (result_type_.get_collation_type() != CS_TYPE_UTF8MB4_BIN) {
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ret = OB_ERR_INVALID_JSON_CHARSET;
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LOG_WARN("invalid out put charset", K(ret), K(result_type_));
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} else if (OB_ISNULL(objs)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("invalid arguments", K(ret), K(objs), K(param_num));
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} else if (OB_ISNULL(allocator)) { // check allocator
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ret = OB_NOT_INIT;
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LOG_WARN("varchar buffer not init", K(ret));
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} else if (OB_FAIL(ObJsonExprHelper::get_json_doc(objs, allocator, 0, j_base, is_null))) {
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LOG_WARN("get_json_doc failed", K(ret));
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}
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for (int32 i = 1; OB_SUCC(ret) && i < param_num && !is_null; i += 2) {
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hit.reset();
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ObString j_path_text = objs[i].get_string();
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ObJsonPath j_path(j_path_text, allocator);
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if (objs[i].get_type() == ObNullType || objs[i].is_null()) {
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is_null = true;
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} else if (OB_FAIL(j_path.parse_path())) {
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LOG_WARN("parse text to path failed", K(j_path_text), K(ret));
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} else if (j_path.can_match_many()) {
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ret = OB_ERR_INVALID_JSON_PATH_WILDCARD;
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LOG_USER_ERROR(OB_ERR_INVALID_JSON_PATH_WILDCARD);
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} else if (j_path.path_node_cnt() == 0
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|| j_path.last_path_node()->get_node_type() != JPN_ARRAY_CELL) {
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ret = OB_ERR_INVALID_JSON_PATH_ARRAY_CELL;
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LOG_WARN("error, path illegal, last path isn't array member", K(ret), K(j_path_text));
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} else if (OB_FAIL(j_base->seek(j_path, j_path.path_node_cnt() - 1, false, true, hit))) {
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LOG_WARN("json seek failed", K(j_path_text), K(ret));
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} else if (hit.size() == 0) {
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// do nothing
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} else {
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ObJsonPathBasicNode *path_node = j_path.last_path_node();
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ObIJsonBase *j_pos_node = hit[0];
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if (j_pos_node->json_type() == ObJsonNodeType::J_ARRAY) {
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bool is_bool = false;
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ObIJsonBase *j_val = NULL;
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if (OB_FAIL(get_param_is_boolean(expr_ctx, objs[i+1], is_bool))) {
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LOG_WARN("failed: get_param_is_boolean", K(ret));
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} else if (OB_FAIL(ObJsonExprHelper::get_json_val(objs[i+1], expr_ctx, is_bool,
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allocator, j_val))) {
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ret = OB_ERR_INVALID_JSON_TEXT_IN_PARAM;
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LOG_USER_ERROR(OB_ERR_INVALID_JSON_TEXT_IN_PARAM);
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} else {
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ObJsonArrayIndex array_index;
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if (OB_FAIL(path_node->get_first_array_index(j_pos_node->element_count(), array_index))) {
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LOG_WARN("failed: get first array index", K(ret), K(j_pos_node->element_count()));
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} else if (OB_FAIL(j_pos_node->array_insert(array_index.get_array_index(), j_val))) {
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LOG_WARN("failed: array insert", K(ret), K(array_index.get_array_index()));
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}
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}
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}
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}
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}
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if (OB_SUCC(ret)) {
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ObString raw_bin;
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if (is_null) {
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result.set_null();
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} else if (OB_FAIL(j_base->get_raw_binary(raw_bin, allocator))) {
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LOG_WARN("fail to get json raw binary", K(ret));
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} else {
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result.set_collation_type(CS_TYPE_UTF8MB4_BIN);
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result.set_string(ObJsonType, raw_bin.ptr(), raw_bin.length());
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}
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}
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return ret;
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}
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int ObExprJsonArrayInsert::eval_json_array_insert(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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INIT_SUCC(ret);
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common::ObArenaAllocator &temp_allocator = ctx.get_reset_tmp_alloc();
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ObIJsonBase *j_base = NULL;
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bool is_null = false;
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ObJsonBaseVector hit;
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if (expr.datum_meta_.cs_type_ != CS_TYPE_UTF8MB4_BIN) {
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ret = OB_ERR_INVALID_JSON_CHARSET;
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LOG_WARN("invalid out put charset", K(ret), K(expr.datum_meta_.cs_type_));
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} else if (OB_FAIL(ObJsonExprHelper::get_json_doc(expr, ctx, temp_allocator, 0, j_base, is_null))) {
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LOG_WARN("get_json_doc failed", K(ret));
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}
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ObJsonPathCache ctx_cache(&temp_allocator);
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ObJsonPathCache* path_cache = NULL;
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if (OB_SUCC(ret) && !is_null) {
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path_cache = ObJsonExprHelper::get_path_cache_ctx(expr.expr_ctx_id_, &ctx.exec_ctx_);
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path_cache = ((path_cache != NULL) ? path_cache : &ctx_cache);
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}
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for (int32 i = 1; OB_SUCC(ret) && i < expr.arg_cnt_ && !is_null; i += 2) {
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hit.reset();
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ObExpr *arg = expr.args_[i];
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ObDatum *json_datum = NULL;
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if (OB_FAIL(expr.args_[i]->eval(ctx, json_datum))) {
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LOG_WARN("failed: eval json path datum.", K(ret));
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} else if (json_datum->is_null() || arg->datum_meta_.type_ == ObNullType) {
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is_null = true;
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} else {
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ObString j_path_text = json_datum->get_string();
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ObJsonPath *j_path;
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if (OB_FAIL(ObJsonExprHelper::find_and_add_cache(path_cache, j_path, j_path_text, i, false))) {
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LOG_WARN("parse text to path failed", K(j_path_text), K(ret));
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} else if (j_path->path_node_cnt() == 0
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|| j_path->last_path_node()->get_node_type() != JPN_ARRAY_CELL) {
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ret = OB_ERR_INVALID_JSON_PATH_ARRAY_CELL;
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LOG_WARN("error, path illegal, last path isn't array member", K(ret), K(j_path_text));
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} else if (OB_FAIL(j_base->seek(*j_path, j_path->path_node_cnt() - 1, false, true, hit))) {
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LOG_WARN("json seek failed", K(j_path_text), K(ret));
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} else if (hit.size() == 0) {
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// do nothing
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} else {
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ObJsonPathBasicNode* path_node = j_path->last_path_node();
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ObIJsonBase *j_pos_node = hit[0];
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if (j_pos_node->json_type() == ObJsonNodeType::J_ARRAY) {
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ObIJsonBase *j_val = NULL;
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if (OB_FAIL(ObJsonExprHelper::get_json_val(expr, ctx, &temp_allocator, i+1, j_val))) {
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ret = OB_ERR_INVALID_JSON_TEXT_IN_PARAM;
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LOG_WARN("failed: get_json_val", K(ret));
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} else {
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ObJsonArrayIndex array_index;
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if (OB_FAIL(path_node->get_first_array_index(j_pos_node->element_count(), array_index))) {
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LOG_WARN("failed: get first array index", K(ret), K(j_pos_node->element_count()));
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} else if (OB_FAIL(j_pos_node->array_insert(array_index.get_array_index(), j_val))) {
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LOG_WARN("failed: array insert", K(ret), K(array_index.get_array_index()));
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}
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}
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}
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}
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}
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}
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if (OB_SUCC(ret)) {
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ObString raw_bin;
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if (is_null) {
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res.set_null();
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} else if (OB_FAIL(j_base->get_raw_binary(raw_bin, &temp_allocator))) {
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LOG_WARN("failed: get json raw binary", K(ret));
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} else {
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uint64_t length = raw_bin.length();
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char *buf = expr.get_str_res_mem(ctx, length);
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if (buf) {
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MEMCPY(buf, raw_bin.ptr(), length);
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res.set_string(buf, raw_bin.length());
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} else {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_WARN("failed: allocate res string buffer.", K(ret), K(length));
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}
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}
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}
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return ret;
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}
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int ObExprJsonArrayInsert::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr,
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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_array_insert;
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return OB_SUCCESS;
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}
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}
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}
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