234 lines
8.0 KiB
C++
Executable File
234 lines
8.0 KiB
C++
Executable File
/**
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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 contains implementation for st_astext.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/expr/ob_expr_st_astext.h"
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#include "observer/omt/ob_tenant_srs_mgr.h"
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#include "sql/engine/expr/ob_geo_expr_utils.h"
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#include "lib/geo/ob_geo_utils.h"
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#include "lib/geo/ob_geo_reverse_coordinate_visitor.h"
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#include "lib/geo/ob_geo_to_wkt_visitor.h"
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#include "lib/geo/ob_geo_func_common.h"
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using namespace oceanbase::common;
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using namespace oceanbase::sql;
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using namespace oceanbase::omt;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprSTAsText::ObExprSTAsText(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_ST_ASTEXT, N_ST_ASTEXT, MORE_THAN_ZERO, VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
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{
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}
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ObExprSTAsText::ObExprSTAsText(ObIAllocator &alloc,
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ObExprOperatorType type,
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const char *name,
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int32_t param_num,
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int32_t dimension) : ObFuncExprOperator(alloc, type, name, param_num, VALID_FOR_GENERATED_COL, dimension)
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{
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}
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int ObExprSTAsText::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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int ret = OB_SUCCESS;
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if (OB_UNLIKELY(param_num > 2)) {
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ObString fun_name(get_name());
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ret = OB_ERR_PARAM_SIZE;
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LOG_USER_ERROR(OB_ERR_PARAM_SIZE, fun_name.length(), fun_name.ptr());
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} else {
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if (1 == param_num) {
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ObObjType data_type = types_stack[0].get_type();
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if (ob_is_geometry(data_type) || ob_is_null(data_type)) {
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// do nothing
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} else {
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types_stack[0].set_calc_type(ObLongTextType);
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types_stack[0].set_calc_collation_type(CS_TYPE_BINARY);
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types_stack[0].set_calc_collation_level(CS_LEVEL_IMPLICIT);
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}
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}
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if (2 == param_num) {
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ObObjType option_type = types_stack[1].get_type();
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if (ob_is_string_type(option_type) || ob_is_null(option_type)) {
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// do nothing
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} else {
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types_stack[1].set_calc_type(ObVarcharType);
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types_stack[1].set_calc_collation_type(types_stack[1].get_collation_type());
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types_stack[1].set_calc_collation_level(types_stack[1].get_collation_level());
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}
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}
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if (OB_SUCC(ret)) {
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type.set_type(ObLongTextType);
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type.set_collation_type(CS_TYPE_UTF8MB4_GENERAL_CI);
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type.set_collation_level(CS_LEVEL_IMPLICIT);
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type.set_accuracy(ObAccuracy::DDL_DEFAULT_ACCURACY[ObLongTextType]);
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}
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}
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return ret;
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}
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int ObExprSTAsText::eval_st_astext_common(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &res,
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const char *func_name)
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{
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int ret = OB_SUCCESS;
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ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
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common::ObArenaAllocator &tmp_allocator = tmp_alloc_g.get_allocator();
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int num_args = expr.arg_cnt_;
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bool is_null_result = false;
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ObString res_wkt;
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omt::ObSrsCacheGuard srs_guard;
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ObSQLSessionInfo *session = ctx.exec_ctx_.get_my_session();
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const ObSrsItem *srs = NULL;
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ObGeometry *geo = NULL;
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bool is_geog = false;
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bool need_reverse = false;
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ObDatum *gis_datum = NULL;
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ObString wkb;
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// get geo
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if (OB_FAIL(expr.args_[0]->eval(ctx, gis_datum))) {
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LOG_WARN("eval geo args failed", K(ret));
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} else if (gis_datum->is_null()) {
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is_null_result = true;
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} else if (FALSE_IT(wkb = gis_datum->get_string())) {
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} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(tmp_allocator, *gis_datum,
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expr.args_[0]->datum_meta_, expr.args_[0]->obj_meta_.has_lob_header(), wkb))) {
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LOG_WARN("fail to get real string data", K(ret), K(wkb));
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} else if (OB_FAIL(ObGeoExprUtils::construct_geometry(tmp_allocator,
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wkb, srs_guard, srs, geo, func_name))) {
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LOG_WARN("fail to create geo", K(ret), K(wkb));
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} else if (OB_NOT_NULL(srs)){
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is_geog = srs->is_geographical_srs();
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need_reverse = is_geog && (srs->is_lat_long_order());
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}
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// get axis_order
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if (!is_null_result && OB_SUCC(ret) && num_args > 1 ) {
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ObGeoAxisOrder axis_order = ObGeoAxisOrder::INVALID;
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ObDatum *datum = NULL;
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ObString dstr;
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if (OB_FAIL(expr.args_[1]->eval(ctx, datum))) {
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LOG_WARN("eval axis_order axis_order failed", K(ret));
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} else if (datum->is_null()){
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is_null_result = true;
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} else if (!ob_is_string_type(expr.args_[1]->datum_meta_.type_) ||
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ObCharset::is_cs_nonascii(expr.args_[1]->datum_meta_.cs_type_)) {
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ret = OB_ERR_GIS_INVALID_DATA;
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LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, func_name);
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} else if (FALSE_IT(dstr = datum->get_string())) {
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} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(tmp_allocator, *datum,
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expr.args_[1]->datum_meta_, expr.args_[1]->obj_meta_.has_lob_header(), dstr))) {
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LOG_WARN("fail to get real string data", K(ret), K(dstr));
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} else if (OB_FAIL(ObGeoExprUtils::parse_axis_order(dstr, func_name, axis_order))) {
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LOG_WARN("failed to parse axis order option string", K(ret));
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} else {
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switch (axis_order) {
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case ObGeoAxisOrder::LONG_LAT: {
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need_reverse = false;
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break;
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}
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case ObGeoAxisOrder::LAT_LONG: {
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need_reverse = true;
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break;
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}
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case ObGeoAxisOrder::SRID_DEFINED: {
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break;
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}
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default: {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected axis order parse result", K(ret));
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break;
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}
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}
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}
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}
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if (!is_null_result && OB_SUCC(ret)) {
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if (OB_ISNULL(geo)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("unexpected null geo", K(ret));
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} else {
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if (is_geog && need_reverse) {
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ObGeoReverseCoordinateVisitor rcoord_visitor;
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if (OB_FAIL(geo->do_visit(rcoord_visitor))) {
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ret = OB_ERR_GIS_INVALID_DATA;
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LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, func_name);
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LOG_WARN("failed to reverse geometry coordinate", K(ret));
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}
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}
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if (OB_FAIL(ret)) {
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} else {
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ObGeoToWktVisitor wkt_visitor(&tmp_allocator);
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if (OB_FAIL(geo->do_visit(wkt_visitor))) {
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ret = OB_ERR_GIS_INVALID_DATA;
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LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, func_name);
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LOG_WARN("failed to transform geo to wkt", K(ret));
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} else {
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wkt_visitor.get_wkt(res_wkt);
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}
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}
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}
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}
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if (OB_FAIL(ret)) {
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} else if (is_null_result) {
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res.set_null();
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} else if (OB_FAIL(ObGeoExprUtils::pack_geo_res(expr, ctx, res, res_wkt))) {
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LOG_WARN("fail to pack geo res", K(ret));
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}
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return ret;
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}
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int ObExprSTAsText::eval_st_astext(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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return eval_st_astext_common(expr, ctx, res, N_ST_ASTEXT);
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}
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int ObExprSTAsWkt::eval_st_astext(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
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{
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return eval_st_astext_common(expr, ctx, res, N_ST_ASWKT);
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}
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int ObExprSTAsText::cg_expr(ObExprCGCtx &expr_cg_ctx,
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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_st_astext;
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return OB_SUCCESS;
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}
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int ObExprSTAsWkt::cg_expr(ObExprCGCtx &expr_cg_ctx,
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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_st_astext;
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return OB_SUCCESS;
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}
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} // namespace sql
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} // namespace oceanbase
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