91 lines
3.1 KiB
C++
91 lines
3.1 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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* This file is for func extractval.
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*/
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#include "ob_expr_extract_value.h"
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#include "ob_expr_lob_utils.h"
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#include "lib/utility/utility.h"
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#include "ob_expr_xml_func_helper.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_exec_context.h"
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#define USING_LOG_PREFIX SQL_ENG
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprExtractValue::ObExprExtractValue(common::ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_XML_EXTRACTVALUE, N_EXTRACTVALUE, MORE_THAN_ONE, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprExtractValue::~ObExprExtractValue() {}
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int ObExprExtractValue::calc_result_typeN(ObExprResType &type,
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ObExprResType *types,
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int64_t param_num,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(param_num != 2 && param_num != 3)) {
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ret = OB_ERR_PARAM_SIZE;
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LOG_WARN("invalid argument number", K(ret), K(param_num));
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} else {
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ObObjType in_type = types[0].get_type();
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if (types[0].is_ext() && types[0].get_udt_id() == T_OBJ_XML) {
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types[0].get_calc_meta().set_sql_udt(ObXMLSqlType);
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} else if (!ob_is_xml_sql_type(in_type, types[0].get_subschema_id())) {
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ret = OB_ERR_INVALID_TYPE_FOR_OP;
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LOG_USER_ERROR(OB_ERR_INVALID_TYPE_FOR_OP, "-", "-");
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LOG_WARN("inconsistent datatypes", K(ret), K(ob_obj_type_str(in_type)));
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} else {
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for (int8_t i = 1; i < param_num && OB_SUCC(ret); i++) {
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ObObjType param_type = types[i].get_type();
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if (param_type == ObNullType) {
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} else if (ob_is_string_type(param_type)) {
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if (types[i].get_charset_type() != CHARSET_UTF8MB4) {
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types[i].set_calc_collation_type(CS_TYPE_UTF8MB4_BIN);
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}
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} else {
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types[i].set_calc_type(ObVarcharType);
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types[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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if (OB_SUCC(ret)) {
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type.set_type(ObVarcharType);
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type.set_collation_type(CS_TYPE_UTF8MB4_BIN);
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// length == OB_MAX_ORACLE_VARCHAR_LENGTH is not supported by generated key, use OB_MAX_VARCHAR_LENGTH_KEY instead
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type.set_length(OB_MAX_VARCHAR_LENGTH_KEY);
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type.set_length_semantics(LS_BYTE);
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}
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}
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return ret;
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}
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int ObExprExtractValue::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, 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_extract_value;
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return OB_SUCCESS;
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}
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} // sql
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} // oceanbase
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