124 lines
3.7 KiB
C++
124 lines
3.7 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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#define USING_LOG_PREFIX SQL_ENG
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#include "ob_expr_json_array.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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ObExprJsonArray::ObExprJsonArray(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc,
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T_FUN_SYS_JSON_ARRAY,
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N_JSON_ARRAY,
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PARAM_NUM_UNKNOWN,
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NOT_ROW_DIMENSION)
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{
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}
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ObExprJsonArray::~ObExprJsonArray()
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{
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}
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int ObExprJsonArray::calc_result_typeN(ObExprResType& type,
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ObExprResType* types_stack,
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int64_t param_num,
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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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if (OB_UNLIKELY(param_num < 0)) {
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ret = OB_ERR_PARAM_SIZE;
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ObString name("json_array");
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LOG_USER_ERROR(OB_ERR_PARAM_SIZE, name.length(), name.ptr());
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} else {
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// param_num >= 0
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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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for (int64_t i = 0; i < param_num; i++) {
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if (ob_is_string_type(types_stack[i].get_type())) {
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if (types_stack[i].get_charset_type() != CHARSET_UTF8MB4) {
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types_stack[i].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
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}
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} else if (types_stack[i].get_type() == ObJsonType) {
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types_stack[i].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
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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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// for new sql engine
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int ObExprJsonArray::eval_json_array(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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INIT_SUCC(ret);
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ObDatum *json_datum = NULL;
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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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ObJsonArray j_arr(&temp_allocator);
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ObIJsonBase *j_base = &j_arr;
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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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}
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for (uint32_t i = 0; OB_SUCC(ret) && i < expr.arg_cnt_; i++) {
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ObIJsonBase *j_val;
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if (OB_FAIL(ObJsonExprHelper::get_json_val(expr, ctx, &temp_allocator, i, j_val))) {
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ret = OB_ERR_INVALID_JSON_TEXT_IN_PARAM;
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LOG_WARN("failed: get_json_val failed", K(ret));
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} else if (OB_FAIL(j_base->array_append(j_val))) {
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LOG_WARN("failed: json array append json value", K(ret));
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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 (OB_FAIL(j_base->get_raw_binary(raw_bin, &temp_allocator))) {
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LOG_WARN("failed: json get 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 (OB_ISNULL(buf)) {
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ret = OB_ALLOCATE_MEMORY_FAILED;
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LOG_WARN("failed: alloc memory for json array result", K(ret), K(length));
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} else {
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MEMMOVE(buf, raw_bin.ptr(), length);
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res.set_string(buf, 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 ObExprJsonArray::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;
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return OB_SUCCESS;
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}
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}
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}
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