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oceanbase/src/sql/engine/expr/ob_expr_st_union.cpp

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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
* This file contains implementation for eval_st_union.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "lib/geo/ob_geo_func_register.h"
#include "lib/geo/ob_geo_ibin.h"
#include "sql/engine/ob_exec_context.h"
#include "ob_expr_st_union.h"
#include "sql/engine/expr/ob_geo_expr_utils.h"
#include "lib/geo/ob_geo_to_tree_visitor.h"
#include "lib/geo/ob_geo_elevation_visitor.h"
#include "lib/geo/ob_geo_func_utils.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
namespace oceanbase
{
namespace sql
{
ObExprSTUnion::ObExprSTUnion(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_ST_UNION, N_ST_UNION, 2,
VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{}
ObExprSTUnion::~ObExprSTUnion()
{}
int ObExprSTUnion::calc_result_type2(ObExprResType &type, ObExprResType &type1,
ObExprResType &type2, common::ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
INIT_SUCC(ret);
if (type1.get_type() == ObNullType) {
} else if (!ob_is_geometry(type1.get_type()) && !ob_is_string_type(type1.get_type())) {
type1.set_calc_type(ObVarcharType);
type1.set_calc_collation_type(CS_TYPE_BINARY);
}
if (type2.get_type() == ObNullType) {
} else if (!ob_is_geometry(type2.get_type()) && !ob_is_string_type(type2.get_type())) {
type2.set_calc_type(ObVarcharType);
type2.set_calc_collation_type(CS_TYPE_BINARY);
}
type.set_geometry();
type.set_length((ObAccuracy::DDL_DEFAULT_ACCURACY[ObGeometryType]).get_length());
return ret;
}
int ObExprSTUnion::process_input_geometry(omt::ObSrsCacheGuard &srs_guard, const ObExpr &expr, ObEvalCtx &ctx,
ObIAllocator &allocator, ObGeometry *&geo1, ObGeometry *&geo2, bool &is_null_res,
const ObSrsItem *&srs)
{
int ret = OB_SUCCESS;
ObDatum *gis_datum1 = nullptr;
ObDatum *gis_datum2 = nullptr;
ObExpr *gis_arg1 = expr.args_[0];
ObExpr *gis_arg2 = expr.args_[1];
ObObjType input_type1 = gis_arg1->datum_meta_.type_;
ObObjType input_type2 = gis_arg2->datum_meta_.type_;
is_null_res = false;
if (OB_FAIL(gis_arg1->eval(ctx, gis_datum1)) || OB_FAIL(gis_arg2->eval(ctx, gis_datum2))) {
LOG_WARN("eval geo args failed", K(ret));
} else if (gis_datum1->is_null() || gis_datum2->is_null()) {
is_null_res = true;
} else {
ObGeoType type1;
ObGeoType type2;
uint32_t srid1;
uint32_t srid2;
ObString wkb1 = gis_datum1->get_string();
ObString wkb2 = gis_datum2->get_string();
bool is_geo1_valid = false;
bool is_geo2_valid = false;
if (OB_FAIL(ObTextStringHelper::read_real_string_data(allocator,
*gis_datum1,
gis_arg1->datum_meta_,
gis_arg1->obj_meta_.has_lob_header(),
wkb1))) {
LOG_WARN("fail to get real string data", K(ret), K(wkb1));
} else if (OB_FAIL(ObTextStringHelper::read_real_string_data(allocator,
*gis_datum2,
gis_arg2->datum_meta_,
gis_arg2->obj_meta_.has_lob_header(),
wkb2))) {
LOG_WARN("fail to get real string data", K(ret), K(wkb2));
} else if (OB_FAIL(ObGeoTypeUtil::get_type_srid_from_wkb(wkb1, type1, srid1))) {
if (ret == OB_ERR_GIS_INVALID_DATA) {
LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, N_ST_UNION);
}
LOG_WARN("get type and srid from wkb failed", K(wkb1), K(ret));
} else if (OB_FAIL(ObGeoTypeUtil::get_type_srid_from_wkb(wkb2, type2, srid2))) {
if (ret == OB_ERR_GIS_INVALID_DATA) {
LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, N_ST_UNION);
}
LOG_WARN("get type and srid from wkb failed", K(wkb2), K(ret));
} else if (srid1 != srid2) {
ret = OB_ERR_GIS_DIFFERENT_SRIDS;
LOG_WARN("srid not the same", K(ret), K(srid1), K(srid2));
LOG_USER_ERROR(OB_ERR_GIS_DIFFERENT_SRIDS, N_ST_UNION, srid1, srid2);
} else if (OB_FAIL(ObGeoExprUtils::get_srs_item(
ctx, srs_guard, wkb1, srs, true, N_ST_UNION))) {
LOG_WARN("fail to get srs item", K(ret), K(wkb1));
} else if (OB_FAIL(ObGeoExprUtils::build_geometry(allocator,
wkb1,
geo1,
srs,
N_ST_UNION,
ObGeoBuildFlag::GEO_ALLOW_3D_DEFAULT | GEO_RESERVE_3D))) {
LOG_WARN("get first geo by wkb failed", K(ret));
} else if (OB_FAIL(ObGeoExprUtils::build_geometry(allocator,
wkb2,
geo2,
srs,
N_ST_UNION,
ObGeoBuildFlag::GEO_ALLOW_3D_DEFAULT | GEO_RESERVE_3D))) {
LOG_WARN("get second geo by wkb failed", K(ret));
}
}
return ret;
}
int ObExprSTUnion::eval_st_union(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
{
int ret = OB_SUCCESS;
bool is_geo1_empty = false;
bool is_geo2_empty = false;
ObGeometry *geo1_3d = nullptr;
ObGeometry *geo2_3d = nullptr;
bool is_null_res = false;
omt::ObSrsCacheGuard srs_guard;
const ObSrsItem *srs = nullptr;
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
ObGeometry *union_res = nullptr;
bool is_empty_res = false;
if (OB_FAIL(
process_input_geometry(srs_guard, expr, ctx, temp_allocator, geo1_3d, geo2_3d, is_null_res, srs))) {
LOG_WARN("fail to process input geometry", K(ret));
} else if (!is_null_res) {
ObGeometry *geo1 = nullptr;
ObGeometry *geo2 = nullptr;
bool is_3d_geo1 = ObGeoTypeUtil::is_3d_geo_type(geo1_3d->type());
bool is_3d_geo2 = ObGeoTypeUtil::is_3d_geo_type(geo2_3d->type());
if ((is_3d_geo1 && !is_3d_geo2) || (!is_3d_geo1 && is_3d_geo2)) {
ret = OB_ERR_GIS_INVALID_DATA;
LOG_WARN("mixed dimension geometries", K(ret), K(is_3d_geo1), K(is_3d_geo2));
} else if (is_3d_geo1) {
if (OB_FAIL(ObGeoTypeUtil::convert_geometry_3D_to_2D(
srs, temp_allocator, geo1_3d, ObGeoBuildFlag::GEO_DEFAULT, geo1))) {
LOG_WARN("fail to convert 3D geometry to 2D", K(ret));
}
} else {
geo1 = geo1_3d;
}
if (OB_FAIL(ret)) {
} else if (is_3d_geo2) {
if (OB_FAIL(ObGeoTypeUtil::convert_geometry_3D_to_2D(
srs, temp_allocator, geo2_3d, ObGeoBuildFlag::GEO_DEFAULT, geo2))) {
LOG_WARN("fail to convert 3D geometry to 2D", K(ret));
}
} else {
geo2 = geo2_3d;
}
if (OB_FAIL(ret)) {
} else {
ObGeoEvalCtx gis_context(&temp_allocator, srs);
if (OB_FAIL(gis_context.append_geo_arg(geo1)) || OB_FAIL(gis_context.append_geo_arg(geo2))) {
LOG_WARN("build gis context failed", K(ret), K(gis_context.get_geo_count()));
} else if (OB_FAIL(
ObGeoFunc<ObGeoFuncType::Union>::geo_func::eval(gis_context, union_res))) {
LOG_WARN("eval st union failed", K(ret));
ObGeoExprUtils::geo_func_error_handle(ret, N_ST_UNION);
} else if (OB_FAIL(ObGeoExprUtils::check_empty(union_res, is_empty_res))) {
LOG_WARN("check geo empty failed", K(ret));
}
}
if (OB_FAIL(ret)) {
} else if (is_empty_res) {
// 2D return GEOMETRYCOLLECTION EMPTY, 3D return GEOMETRYCOLLECTION Z EMPTY
if (OB_FAIL(ObGeoExprUtils::create_3D_empty_collection(temp_allocator, geo1->get_srid(), is_3d_geo1,
geo1->crs() == ObGeoCRS::Geographic, union_res))) {
LOG_WARN("fail to create 3D empty collection", K(ret));
}
} else {
if ((!is_3d_geo1)) {
if (geo1->crs() == ObGeoCRS::Cartesian) {
if (OB_FAIL(ObGeoFuncUtils::remove_duplicate_multi_geo<ObCartesianGeometrycollection>(
union_res, temp_allocator, srs))) {
// should not do simplify in symdifference functor, it may affect
// ObGeoFuncUtils::ob_geo_gc_union
LOG_WARN("fail to remove_duplicate_multi_geo", K(ret));
} else if (OB_FAIL(ObGeoFuncUtils::simplify_geo_collection<ObCartesianGeometrycollection>(
union_res, temp_allocator, srs))) {
LOG_WARN("fail to simplify_geo_collection", K(ret));
}
} else if (geo1->crs() == ObGeoCRS::Geographic) {
if (OB_FAIL(ObGeoFuncUtils::remove_duplicate_multi_geo<ObGeographGeometrycollection>(
union_res, temp_allocator, srs))) {
// should not do simplify in symdifference functor, it may affect
// ObGeoFuncUtils::ob_geo_gc_union
LOG_WARN("fail to remove_duplicate_multi_geo", K(ret));
} else if (OB_FAIL(ObGeoFuncUtils::simplify_geo_collection<ObGeographGeometrycollection>(
union_res, temp_allocator, srs))) {
LOG_WARN("fail to simplify_geo_collection", K(ret));
}
}
} else {
// 3D
if (geo1->crs() == ObGeoCRS::Cartesian
&& OB_FAIL(ObGeoFuncUtils::remove_duplicate_multi_geo<ObCartesianGeometrycollection>(
union_res, temp_allocator, srs))) {
// should not do simplify in symdifference functor, it may affect
// ObGeoFuncUtils::ob_geo_gc_union
LOG_WARN("fail to simplify result", K(ret));
} else if (geo1->crs() == ObGeoCRS::Geographic
&& OB_FAIL(ObGeoFuncUtils::remove_duplicate_multi_geo<ObGeographGeometrycollection>(
union_res, temp_allocator, srs))) {
// should not do simplify in symdifference functor, it may affect
// ObGeoFuncUtils::ob_geo_gc_union
LOG_WARN("fail to simplify result", K(ret));
} else {
// populate Z coordinates
ObGeoElevationVisitor visitor(temp_allocator, srs);
ObGeometry *union_res_bin = nullptr;
if (OB_FAIL(visitor.init(*geo1_3d, *geo2_3d))) {
LOG_WARN("fail to init elevation visitor", K(ret));
} else if (OB_FAIL(ObGeoTypeUtil::tree_to_bin(temp_allocator, union_res, union_res_bin, srs))) {
LOG_WARN("fail to do tree to bin", K(ret));
} else if (OB_FAIL(union_res_bin->do_visit(visitor))) {
LOG_WARN("fail to do elevation visitor", K(ret));
} else if (OB_FAIL(visitor.get_geometry_3D(union_res))) {
LOG_WARN("failed get geometry 3D", K(ret));
}
}
}
}
}
if (OB_FAIL(ret)) {
} else if (is_null_res) {
res.set_null();
} else {
ObString res_wkb;
if (OB_FAIL(ObGeoExprUtils::geo_to_wkb(*union_res, expr, ctx, srs, res_wkb))) {
LOG_WARN("failed to write geometry to wkb", K(ret));
} else {
res.set_string(res_wkb);
}
}
return ret;
}
int ObExprSTUnion::cg_expr(
ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
{
UNUSED(expr_cg_ctx);
UNUSED(raw_expr);
rt_expr.eval_func_ = eval_st_union;
return OB_SUCCESS;
}
} // namespace sql
} // namespace oceanbase
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