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src/sql/engine/expr/ob_expr_st_aswkb.cpp
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255
src/sql/engine/expr/ob_expr_st_aswkb.cpp
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/**
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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_aswkb/_st_asewkb/st_asbinary expr.
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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_aswkb.h"
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#include "lib/geo/ob_geo_func_common.h"
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#include "lib/geo/ob_geo_reverse_coordinate_visitor.h"
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#include "lib/geo/ob_geo_utils.h"
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#include "sql/engine/expr/ob_geo_expr_utils.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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ObExprGeomWkb::ObExprGeomWkb(common::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)
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: ObFuncExprOperator(alloc,
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type,
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name,
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param_num,
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dimension)
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{
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}
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ObExprGeomWkb::~ObExprGeomWkb()
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{
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}
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bool ObExprGeomWkb::is_blank_string(const ObCollationType coll_type,
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const ObString &str) const
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{
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bool is_blank_string = true;
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const char *c = str.ptr();
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for (int64_t i = 0; i < str.length() && is_blank_string; i++) {
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if (!ObCharset::is_space(coll_type, *c)) {
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is_blank_string = false;
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} else {
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c++;
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}
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}
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return is_blank_string;
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}
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int ObExprGeomWkb::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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type.set_type(ObLongTextType);
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type.set_collation_level(common::CS_LEVEL_IMPLICIT);
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type.set_collation_type(CS_TYPE_BINARY);
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type.set_accuracy(ObAccuracy::DDL_DEFAULT_ACCURACY[ObLongTextType]);
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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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return ret;
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}
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int ObExprGeomWkb::eval_geom_wkb(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &res)
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{
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int ret = OB_SUCCESS;
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uint32_t arg_num = expr.arg_cnt_;
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bool is_null_result = false;
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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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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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bool is_geog = false;
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bool is_lat_long_order = false;
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bool need_reverse = false;
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bool srid_default_ordering = true;
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ObDatum *wkb_datum = NULL;
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ObGeometry *geo = NULL;
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ObGeoAxisOrder axis_order = ObGeoAxisOrder::INVALID;
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if (OB_FAIL(expr.args_[0]->eval(ctx, wkb_datum))) {
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LOG_WARN("fail to eval wkb datum", K(ret));
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} else if (wkb_datum->is_null()) {
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is_null_result = true;
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} else if (OB_FAIL(ObGeoExprUtils::construct_geometry(tmp_allocator,
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wkb_datum->get_string(), srs_guard, srs, geo, get_func_name()))) {
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LOG_WARN("fail to create geo bin", K(ret), K(wkb_datum->get_string()));
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} else if (OB_NOT_NULL(srs)) {
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is_geog = srs->is_geographical_srs();
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is_lat_long_order = srs->is_lat_long_order();
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need_reverse = is_geog && is_lat_long_order;
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}
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if (OB_SUCC(ret) && !is_null_result && arg_num == 2) {
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ObDatum *option_datum = NULL;
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if (OB_FAIL(expr.args_[1]->eval(ctx, option_datum))) {
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LOG_WARN("fail to eval option datum", K(ret));
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} else if (option_datum->is_null()){
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is_null_result = true;
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} else if (is_blank_string(expr.args_[1]->datum_meta_.cs_type_, option_datum->get_string())) {
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// do nothing ====> select st_aswkb(point(1,1), ' '); ignore ' '
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} else if (OB_FAIL(ObGeoExprUtils::parse_axis_order(option_datum->get_string(), get_func_name(),
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axis_order))) {
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LOG_WARN("fail to parse axis order option string", K(ret), K(option_datum->get_string()));
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ret = OB_ERR_INVALID_OPTION_KEY_VALUE_PAIR; // adapt mysql errcode.
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const int64_t len = option_datum->get_string().length();
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char str[len + 1];
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str[len] = '\0';
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MEMCPY(str, option_datum->get_string().ptr(), len);
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LOG_USER_ERROR(OB_ERR_INVALID_OPTION_KEY_VALUE_PAIR, str, '=', get_func_name());
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} else if (OB_FAIL(ObGeoExprUtils::check_need_reverse(axis_order, need_reverse))) {
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LOG_WARN("fail to check need reverse", K(ret), K(axis_order));
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}
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}
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if (OB_SUCC(ret) && !is_null_result) {
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if (ObGeoAxisOrder::LONG_LAT == axis_order || ObGeoAxisOrder::LAT_LONG == axis_order) {
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srid_default_ordering = false;
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}
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if (srid_default_ordering && is_geog && is_lat_long_order) {
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need_reverse = true;
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}
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if (need_reverse && is_geog) {
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ObGeoReverseCoordinateVisitor rcoord_visitor;
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if (OB_FAIL(geo->do_visit(rcoord_visitor))) {
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LOG_WARN("failed to reverse geometry coordinate", K(ret));
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ret = OB_ERR_GIS_INVALID_DATA;
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LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, get_func_name());
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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 res_wkb;
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ObString wkb;
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uint32_t offset = 0;
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if (is_null_result) {
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res.set_null();
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} else if (OB_FAIL(ObGeoExprUtils::geo_to_wkb(*geo, expr, ctx, srs, res_wkb))) {
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LOG_WARN("failed to write geometry to wkb", K(ret));
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} else if (ObGeoTypeUtil::get_wkb_from_swkb(res_wkb, wkb, offset)) {
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LOG_WARN("failed to get wkb from swkb", K(ret));
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} else {
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res.set_string(wkb); // skip srid + version
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}
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}
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return ret;
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}
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ObExprSTAsWkb::ObExprSTAsWkb(common::ObIAllocator &alloc)
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: ObExprGeomWkb(alloc,
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T_FUN_SYS_ST_ASWKB,
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N_ST_ASWKB,
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ONE_OR_TWO,
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NOT_ROW_DIMENSION)
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{
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}
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ObExprSTAsWkb::~ObExprSTAsWkb()
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{
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}
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int ObExprSTAsWkb::eval_st_aswkb(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &res)
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{
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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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ObExprSTAsWkb aswkb(tmp_allocator);
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ObExprGeomWkb *p = &aswkb;
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return p->eval_geom_wkb(expr, ctx, res);
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}
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int ObExprSTAsWkb::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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UNUSEDx(expr_cg_ctx, raw_expr);
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rt_expr.eval_func_ = eval_st_aswkb;
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return common::OB_SUCCESS;
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}
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ObExprSTAsBinary::ObExprSTAsBinary(common::ObIAllocator &alloc)
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: ObExprGeomWkb(alloc,
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T_FUN_SYS_ST_ASBINARY,
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N_ST_ASBINARY,
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ONE_OR_TWO,
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NOT_ROW_DIMENSION)
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{
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}
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ObExprSTAsBinary::~ObExprSTAsBinary()
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{
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}
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int ObExprSTAsBinary::eval_st_asbinary(const ObExpr &expr,
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ObEvalCtx &ctx,
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ObDatum &res)
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{
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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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ObExprSTAsBinary asbin(tmp_allocator);
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ObExprGeomWkb *p = &asbin;
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return p->eval_geom_wkb(expr, ctx, res);
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}
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int ObExprSTAsBinary::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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UNUSEDx(expr_cg_ctx, raw_expr);
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rt_expr.eval_func_ = eval_st_asbinary;
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return common::OB_SUCCESS;
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}
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} // namespace sql
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} // namespace oceanbase
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