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oceanbase/src/sql/engine/expr/ob_expr_st_transform.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 st_transform.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "lib/geo/ob_geo_func_register.h"
#include "ob_expr_st_transform.h"
#include "lib/geo/ob_srs_info.h"
#include "observer/omt/ob_tenant_srs_mgr.h"
#include "lib/geo/ob_geo_normalize_visitor.h"
#include "lib/geo/ob_geo_wkb_size_visitor.h"
#include "lib/geo/ob_geo_wkb_visitor.h"
#include "sql/engine/expr/ob_geo_expr_utils.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
namespace oceanbase
{
namespace sql
{
ObExprSTTransform::ObExprSTTransform(ObIAllocator &alloc)
: ObFuncExprOperator(alloc, T_FUN_SYS_ST_TRANSFORM, N_ST_TRANSFORM, 2, NOT_ROW_DIMENSION)
{
}
int ObExprSTTransform::calc_result_type2(ObExprResType &type,
ObExprResType &type1,
ObExprResType &type2,
common::ObExprTypeCtx &type_ctx) const
{
int ret = OB_SUCCESS;
UNUSED(type_ctx);
ObObjType type_g = type1.get_type();
ObObjType type_srid = type2.get_type();
if (ob_is_null(type_g)) {
// do nothing
} else if (ob_is_numeric_type(type_g)) {
type1.set_calc_type(ObLongTextType);
} else if (!ob_is_geometry(type_g) && !ob_is_string_type(type_g)) {
ret = OB_ERR_GIS_INVALID_DATA;
LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, get_name());
}
if (OB_SUCC(ret)) {
if (ob_is_null(type_srid)) {
// do nothing
} else {
type2.set_calc_type(ObIntType);
type_ctx.set_cast_mode(type_ctx.get_cast_mode() | CM_STRING_INTEGER_TRUNC);
}
}
type.set_geometry();
type.set_length((ObAccuracy::DDL_DEFAULT_ACCURACY[ObGeometryType]).get_length());
return ret;
}
int ObExprSTTransform::eval_st_transform(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res)
{
int ret = OB_SUCCESS;
ObDatum *gis_datum = NULL;
ObDatum *datum2 = NULL;
ObGeometry *src_geo = NULL;
ObGeometry *dest_geo = NULL;
omt::ObSrsCacheGuard srs_guard;
const ObSrsItem *src_srs_item = NULL;
ObEvalCtx::TempAllocGuard tmp_alloc_g(ctx);
common::ObArenaAllocator &temp_allocator = tmp_alloc_g.get_allocator();
ObString src_proj4_param;
ObString dest_proj4_param;
bool need_eval = true;
bool is_null_result = false;
// check null
is_null_result = ob_is_null(expr.args_[0]->datum_meta_.type_) || ob_is_null(expr.args_[1]->datum_meta_.type_);
if (is_null_result) {
res.set_null();
} else if (OB_FAIL(expr.args_[0]->eval(ctx, gis_datum))) {
LOG_WARN("eval geo arg failed", K(ret));
} else if (OB_FAIL(expr.args_[1]->eval(ctx, datum2))) {
LOG_WARN("eval sird arg failed", K(ret));
} else if (gis_datum->is_null() || datum2->is_null()) {
res.set_null();
} else {
uint32_t src_srid = 0;
uint32_t dest_srid = 0;
ObString wkb = gis_datum->get_string();
const ObSrsItem *dest_srs_item = NULL;
if (OB_FAIL(ObTextStringHelper::read_real_string_data(temp_allocator, *gis_datum,
expr.args_[0]->datum_meta_, expr.args_[0]->obj_meta_.has_lob_header(), wkb))) {
LOG_WARN("fail to get real string data", K(ret), K(wkb));
} else if (OB_FAIL(ObGeoExprUtils::get_srs_item(ctx, srs_guard, wkb, src_srs_item, true, N_ST_TRANSFORM))) {
LOG_WARN("fail to get srs item", K(ret), K(wkb));
} else if (OB_FAIL(ObGeoTypeUtil::get_srid_from_wkb(wkb, src_srid))) {
ret = OB_ERR_GIS_INVALID_DATA;
LOG_USER_ERROR(OB_ERR_GIS_INVALID_DATA, N_ST_TRANSFORM);
LOG_WARN("get srid from wkb failed", K(wkb), K(ret));
} else {
if (datum2->get_int() < 0 || datum2->get_int() > UINT_MAX32) {
ret = OB_OPERATE_OVERFLOW;
LOG_WARN("srid input value out of range", K(ret), K(datum2->get_int()));
LOG_USER_ERROR(OB_OPERATE_OVERFLOW, "SRID", N_ST_TRANSFORM);
}
dest_srid = datum2->get_int();
if (OB_SUCC(ret)) {
if (dest_srid == src_srid) { // return src geo directly
ObString res_wkb;
if (OB_FAIL(ObGeoExprUtils::build_geometry(temp_allocator, wkb, src_geo, src_srs_item, N_ST_TRANSFORM, false, false, false))) {
LOG_WARN("fail to create geo", K(ret), K(wkb));
} else if (OB_FAIL(ObGeoExprUtils::geo_to_wkb(*src_geo, expr, ctx, src_srs_item, res_wkb))) {
LOG_WARN("failed to write geometry to wkb", K(ret));
} else {
res.set_string(res_wkb);
need_eval = false;
}
} else if (OB_ISNULL(src_srs_item)) { // valid only when dest srid is also 0
ret = OB_ERR_TRANSFORM_SOURCE_SRS_NOT_SUPPORTED;
LOG_USER_ERROR(OB_ERR_TRANSFORM_SOURCE_SRS_NOT_SUPPORTED, src_srid);
} else if (dest_srid == 0) { // valid only when src srid is also 0
ret = OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED;
LOG_USER_ERROR(OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED, dest_srid);
} else if (OB_FAIL(srs_guard.get_srs_item(dest_srid, dest_srs_item))) {
LOG_WARN("failed to get dest srs", K(ret), K(dest_srid));
} else if (OB_FAIL(dest_srs_item->get_proj4_param(&temp_allocator, dest_proj4_param))) {
LOG_WARN("failed to get proj4 prams from dest srs", K(ret), K(dest_srid));
}
}
if (OB_SUCC(ret) && need_eval) {
if (src_srs_item->missing_towgs84()) {
ret = OB_ERR_TRANSFORM_SOURCE_SRS_MISSING_TOWGS84;
LOG_USER_ERROR(OB_ERR_TRANSFORM_SOURCE_SRS_MISSING_TOWGS84, src_srid);
LOG_WARN("source srs is not WGS 84 and has no TOWGS84 clause", K(ret), K(src_srid));
}
if (OB_ISNULL(dest_srs_item)) {
ret = OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED;
LOG_USER_ERROR(OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED, dest_srid);
LOG_WARN("dest srs is null", K(ret), K(dest_srid));
} else if(dest_srs_item->missing_towgs84()) {
ret = OB_ERR_TRANSFORM_TARGET_SRS_MISSING_TOWGS84;
LOG_USER_ERROR(OB_ERR_TRANSFORM_TARGET_SRS_MISSING_TOWGS84, dest_srid);
LOG_WARN("dest srs is not WGS 84 and has no TOWGS84 clause", K(ret), K(dest_srid));
} else if (!src_srs_item->is_geographical_srs()) {
ret = OB_ERR_TRANSFORM_SOURCE_SRS_NOT_SUPPORTED;
LOG_USER_ERROR(OB_ERR_TRANSFORM_SOURCE_SRS_NOT_SUPPORTED, src_srid);
LOG_WARN("src srs is not geog", K(ret), K(src_srid));
} else if (!dest_srs_item->is_geographical_srs()) {
ret = OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED;
LOG_USER_ERROR(OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED, dest_srid);
LOG_WARN("dest srs is not geog", K(ret), K(dest_srid));
}
}
if (OB_SUCC(ret) && need_eval && src_srid != 0) {
if (OB_FAIL(src_srs_item->get_proj4_param(&temp_allocator, src_proj4_param))) {
LOG_WARN("failed to get proj4 prams from srs", K(ret), K(src_srid));
}
}
// eval by bg
if (OB_SUCC(ret) && need_eval) {
int correct_result;
ObGeoEvalCtx correct_context(&temp_allocator, src_srs_item);
ObGeoEvalCtx transform_context(&temp_allocator, dest_srs_item);
if (src_proj4_param.empty()) {
ret = OB_ERR_TRANSFORM_SOURCE_SRS_NOT_SUPPORTED;
LOG_USER_ERROR(OB_ERR_TRANSFORM_SOURCE_SRS_NOT_SUPPORTED, src_srid);
} else if (dest_proj4_param.empty()) {
ret = OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED;
LOG_USER_ERROR(OB_ERR_TRANSFORM_TARGET_SRS_NOT_SUPPORTED, dest_srid);
} else if (OB_FAIL(ObGeoExprUtils::build_geometry(temp_allocator, wkb, src_geo,
src_srs_item, N_ST_TRANSFORM))) {
LOG_WARN("failed to parse wkb", K(ret));
} else if (OB_FAIL(correct_context.append_geo_arg(src_geo))) {
LOG_WARN("failed to append geo arg to gis context", K(ret), K(correct_context.get_geo_count()));
} else if (OB_FAIL(transform_context.append_geo_arg(src_geo))) {
LOG_WARN("failed to append geo arg to gis context", K(ret), K(transform_context.get_geo_count()));
} else if (OB_FAIL(transform_context.append_val_arg(&src_proj4_param))) {
LOG_WARN("failed to append src_proj4_param to gis context", K(ret), K(transform_context.get_geo_count()));
} else if (OB_FAIL(transform_context.append_val_arg(&dest_proj4_param))) {
LOG_WARN("failed to append dest_proj4_param to gis context", K(ret), K(transform_context.get_geo_count()));
} else if (OB_NOT_NULL(src_srs_item) && OB_FAIL(ObGeoFunc<ObGeoFuncType::Correct>::geo_func::eval(correct_context, correct_result))) {
LOG_WARN("eval boost correct failed", K(ret));
} else if (OB_FAIL(ObGeoFunc<ObGeoFuncType::Transform>::geo_func::eval(transform_context, dest_geo))) {
LOG_WARN("eval boost transform failed", K(ret), K(src_proj4_param), K(dest_proj4_param));
ObGeoExprUtils::geo_func_error_handle(ret, N_ST_TRANSFORM);
} else if (dest_srs_item == NULL && OB_FAIL(ObGeoExprUtils::denormalize_wkb(dest_proj4_param, dest_geo))) {
LOG_WARN("failed to do denormalize wkb", K(ret), K(dest_proj4_param));
} else if ((OB_ISNULL(dest_srs_item) && dest_srid != 0) || OB_ISNULL(dest_geo)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expected null srs_item or res_geo", K(ret), K(dest_srid), KP(dest_srs_item), KP(dest_geo));
} else {
ObString res_wkb;
if (OB_FAIL(ObGeoExprUtils::geo_to_wkb(*dest_geo, expr, ctx, dest_srs_item, res_wkb, dest_srid))){
LOG_WARN("failed to write geometry to wkb", K(ret));
} else {
res.set_string(res_wkb);
}
}
}
}
}
return ret;
}
int ObExprSTTransform::cg_expr(ObExprCGCtx &expr_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
{
UNUSEDx(expr_cg_ctx, raw_expr);
rt_expr.eval_func_ = eval_st_transform;
return OB_SUCCESS;
}
} // namespace sql
} // namespace oceanbase
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