126 lines
4.9 KiB
C++
126 lines
4.9 KiB
C++
/**
|
|
* 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_buffer and st_buffer_strategy.
|
|
*/
|
|
|
|
#ifndef OCEANBASE_SQL_OB_EXPR_ST_BUFFER
|
|
#define OCEANBASE_SQL_OB_EXPR_ST_BUFFER
|
|
|
|
#include "sql/engine/expr/ob_expr_operator.h"
|
|
#include "observer/omt/ob_tenant_srs_mgr.h"
|
|
#include "sql/engine/expr/ob_geo_expr_utils.h"
|
|
|
|
namespace oceanbase
|
|
{
|
|
namespace sql
|
|
{
|
|
|
|
// for st_buffer_strategy and st_buffer
|
|
enum class ObGeoBufferStrategyType
|
|
{
|
|
INVALID = 0,
|
|
END_ROUND = 1,
|
|
END_FLAT = 2,
|
|
JOIN_ROUND = 3,
|
|
JOIN_MITER = 4,
|
|
POINT_CIRCLE = 5,
|
|
POINT_SQUARE = 6,
|
|
};
|
|
|
|
class ObExprSTBufferStrategy : public ObFuncExprOperator
|
|
{
|
|
public:
|
|
static constexpr int BUF_STRATEGY_RES_LENGTH = 16;
|
|
explicit ObExprSTBufferStrategy(common::ObIAllocator &alloc);
|
|
virtual ~ObExprSTBufferStrategy() {}
|
|
virtual int calc_result_typeN(ObExprResType &type,
|
|
ObExprResType *types,
|
|
int64_t param_num,
|
|
common::ObExprTypeCtx &type_ctx) const;
|
|
static int eval_st_buffer_strategy(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
|
|
virtual int cg_expr(ObExprCGCtx &expr_cg_ctx,
|
|
const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const override;
|
|
|
|
public:
|
|
static ObGeoBufferStrategyType get_strategy_type_by_name(const common::ObString &name);
|
|
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(ObExprSTBufferStrategy);
|
|
};
|
|
|
|
class ObExprSTBuffer : public ObFuncExprOperator
|
|
{
|
|
public:
|
|
explicit ObExprSTBuffer(common::ObIAllocator &alloc);
|
|
explicit ObExprSTBuffer(common::ObIAllocator &alloc,
|
|
ObExprOperatorType type,
|
|
const char *name,
|
|
int32_t param_num,
|
|
int32_t dimension);
|
|
virtual ~ObExprSTBuffer() {}
|
|
virtual int calc_result_typeN(ObExprResType &type,
|
|
ObExprResType *types,
|
|
int64_t param_num,
|
|
common::ObExprTypeCtx &type_ctx) const;
|
|
static int eval_st_buffer(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
|
|
virtual int cg_expr(ObExprCGCtx &expr_cg_ctx,
|
|
const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const override;
|
|
protected:
|
|
static bool is_valid_distance(double distance);
|
|
static int parse_binary_strategy(const common::ObString &str, common::ObGeoBufferStrategy &strategy);
|
|
static int parse_text_strategy(common::ObString &str, common::ObGeoBufferStrategy &strategy);
|
|
static int init_buffer_strategy(const ObExpr &expr,
|
|
ObEvalCtx &ctx,
|
|
ObIAllocator &allocator,
|
|
common::ObGeoBufferStrategy &buf_strat,
|
|
double distance);
|
|
static int init_buffer_strategy(const common::ObObj *params,
|
|
int64_t param_num,
|
|
common::ObExprCtx &expr_ctx,
|
|
common::ObGeoBufferStrategy &buf_strat,
|
|
double distance);
|
|
static int fill_proj4_params(common::ObIAllocator &allocator,
|
|
omt::ObSrsCacheGuard &srs_guard,
|
|
uint32 srid,
|
|
common::ObGeometry *geo,
|
|
const common::ObSrsItem *srs,
|
|
common::ObGeoBufferStrategy &buf_strat,
|
|
bool &is_transform_method);
|
|
private:
|
|
// Notice: Do not change order of mask and state type of buffer strategy!
|
|
static const uint8_t JOIN_MITER_MASK = 4;
|
|
static const uint8_t END_FLAT_MASK = 2;
|
|
static const uint8_t POINT_SQUARE_MASK = 1;
|
|
DISALLOW_COPY_AND_ASSIGN(ObExprSTBuffer);
|
|
};
|
|
|
|
class ObExprPrivSTBuffer : public ObExprSTBuffer
|
|
{
|
|
public:
|
|
explicit ObExprPrivSTBuffer(common::ObIAllocator &alloc);
|
|
virtual ~ObExprPrivSTBuffer() {}
|
|
virtual int calc_result_typeN(ObExprResType &type,
|
|
ObExprResType *types,
|
|
int64_t param_num,
|
|
common::ObExprTypeCtx &type_ctx) const;
|
|
static int eval_priv_st_buffer(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &res);
|
|
virtual int cg_expr(ObExprCGCtx &expr_cg_ctx,
|
|
const ObRawExpr &raw_expr,
|
|
ObExpr &rt_expr) const override;
|
|
private:
|
|
DISALLOW_COPY_AND_ASSIGN(ObExprPrivSTBuffer);
|
|
};
|
|
|
|
} // sql
|
|
} // oceanbase
|
|
#endif // OCEANBASE_SQL_OB_EXPR_ST_BUFFER
|