2d19a9d8f5
Co-authored-by: leslieyuchen <leslieyuchen@gmail.com> Co-authored-by: Charles0429 <xiezhenjiang@gmail.com> Co-authored-by: raywill <hustos@gmail.com>
214 lines
7.1 KiB
C++
214 lines
7.1 KiB
C++
/**
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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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*/
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#ifndef SRC_SQL_ENGINE_EXPR_OB_EXPR_UUID_H_
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#define SRC_SQL_ENGINE_EXPR_OB_EXPR_UUID_H_
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#include "sql/engine/expr/ob_expr_operator.h"
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namespace oceanbase
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{
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namespace sql
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{
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class ObBigEndian
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{
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public:
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static int put_uint16(unsigned char *b, uint16_t v);
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static int put_uint32(unsigned char *b, uint32_t v);
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private :
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//disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObBigEndian);
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};
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struct ObUUIDNode
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{
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ObUUIDNode();
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int init();
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unsigned char mac_addr_[6];
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bool is_inited_;
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};
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class ObUUIDTime
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{
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public:
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static int get_time(uint64_t &time, uint16_t &seq);
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private:
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static int time_now(uint64_t &now);
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static void reset_clock_seq();
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static const uint64_t LILLIAN = 2299160; // Julian day of 15 Oct 1582
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static const uint64_t UNIXX = 2440587; // Julian day of 1 Jan 1970
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static const uint64_t EPOCH = UNIXX - LILLIAN; // Days between EPOCHs
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static const uint64_t G1582 = EPOCH * 86400; // seconds between EPOCHs
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static const uint64_t G1582NS100 = G1582 * 10000000; // 100s of a nanoseconds between EPOCHs
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static uint64_t lasttime_;
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static uint16_t clock_seq_;
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static common::ObLatch lock_;
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};
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class UuidCommon {
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public:
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static int uuid2bin(char *result, bool &is_valid, const char *src, int64_t len);
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static int bin2uuid(char *result, const uchar *src);
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private:
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static int read_section(char *res, bool &is_valid, const char *src, int64_t len);
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public:
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static constexpr common::ObLength bytes_per_section[] = {4, 2, 2, 2, 6};
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//aaaaaaaa-bbbb-cccc-dddd-eeeeeeeeeeee
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static const common::ObLength LENGTH_UUID = 36;
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static const common::ObLength BYTE_LENGTH = 16;
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};
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class ObExprUuid : public ObFuncExprOperator
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{
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public:
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explicit ObExprUuid(common::ObIAllocator &alloc);
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explicit ObExprUuid(
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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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virtual ~ObExprUuid();
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virtual int calc_result_type0(ObExprResType &type,
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common::ObExprTypeCtx &type_ctx) const;
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static int init();
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static int eval_uuid(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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//used to generate uuid for server_uuid system variable.
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static int gen_server_uuid(char *server_uuid, const int64_t uuid_len);
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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protected:
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static int calc(unsigned char *scratch);
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private:
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static ObUUIDNode *uuid_node;
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//disallow copy
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DISALLOW_COPY_AND_ASSIGN(ObExprUuid);
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};
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inline int ObExprUuid::calc_result_type0(ObExprResType &type,
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common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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type.set_varchar();
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type.set_collation_level(common::CS_LEVEL_IMPLICIT);
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type.set_collation_type(common::ObCharset::get_default_collation(common::ObCharset::get_default_charset()));
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type.set_length(UuidCommon::LENGTH_UUID);
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return common::OB_SUCCESS;
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}
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class ObExprSysGuid : public ObExprUuid
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{
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public:
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explicit ObExprSysGuid(common::ObIAllocator &alloc);
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virtual ~ObExprSysGuid();
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virtual int calc_result_type0(
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ObExprResType &type, common::ObExprTypeCtx &type_ctx) const;
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static int eval_sys_guid(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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virtual int cg_expr(ObExprCGCtx &,
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const ObRawExpr &,
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ObExpr &rt_expr) const override
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{
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rt_expr.eval_func_ = eval_sys_guid;
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return common::OB_SUCCESS;
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}
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private:
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static const common::ObLength LENGTH_SYS_GUID = 16;
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprSysGuid);
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};
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inline int ObExprSysGuid::calc_result_type0(
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ObExprResType &type, common::ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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type.set_raw();
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type.set_length(LENGTH_SYS_GUID);
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return common::OB_SUCCESS;
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}
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class ObExprUuid2bin : public ObFuncExprOperator
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{
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public:
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explicit ObExprUuid2bin(common::ObIAllocator &alloc);
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virtual ~ObExprUuid2bin();
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *types,
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int64_t type_num,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int uuid2bin(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int uuid2bin_batch(const ObExpr &expr, ObEvalCtx &ctx, const ObBitVector &skip, const int64_t batch_size);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprUuid2bin);
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};
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class ObExprIsUuid : public ObFuncExprOperator
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{
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public:
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explicit ObExprIsUuid(common::ObIAllocator &alloc);
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virtual ~ObExprIsUuid();
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virtual int calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int is_uuid(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int is_uuid_batch(const ObExpr &expr, ObEvalCtx &ctx, const ObBitVector &skip, const int64_t batch_size);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprIsUuid);
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};
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inline int ObExprIsUuid::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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common::ObExprTypeCtx &type_ctx) const
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{
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int ret = OB_SUCCESS;
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UNUSED(type_ctx);
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type.set_tinyint();
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type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
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type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
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type1.set_calc_type(common::ObVarcharType);
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type1.set_calc_collation_type(type1.get_collation_type());
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type1.set_calc_collation_level(type1.get_collation_level());
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return ret;
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}
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class ObExprBin2uuid : public ObFuncExprOperator
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{
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public:
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explicit ObExprBin2uuid(common::ObIAllocator &alloc);
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virtual ~ObExprBin2uuid();
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virtual int calc_result_typeN(ObExprResType &type,
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ObExprResType *types,
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int64_t type_num,
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common::ObExprTypeCtx &type_ctx) const;
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virtual int cg_expr(ObExprCGCtx &op_cg_ctx,
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const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const override;
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static int bin2uuid(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum);
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static int bin2uuid_batch(const ObExpr &expr, ObEvalCtx &ctx, const ObBitVector &skip, const int64_t batch_size);
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private:
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DISALLOW_COPY_AND_ASSIGN(ObExprBin2uuid);
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};
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}
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}
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#endif /* SRC_SQL_ENGINE_EXPR_OB_EXPR_UUID_H_ */
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