init push
This commit is contained in:
oceanbase-admin
151
src/sql/engine/expr/ob_datum_cast.h
Normal file
151
src/sql/engine/expr/ob_datum_cast.h
Normal file
@ -0,0 +1,151 @@
|
||||
/**
|
||||
* 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.
|
||||
*/
|
||||
|
||||
#ifndef _OB_EXPR_DATUM_CAST_
|
||||
#define _OB_EXPR_DATUM_CAST_
|
||||
|
||||
#include "common/object/ob_object.h"
|
||||
#include "common/ob_zerofill_info.h"
|
||||
#include "lib/timezone/ob_timezone_info.h"
|
||||
#include "lib/timezone/ob_time_convert.h"
|
||||
#include "lib/charset/ob_charset.h"
|
||||
#include "share/ob_errno.h"
|
||||
#include "share/datum/ob_datum.h"
|
||||
#include "share/object/ob_obj_cast.h"
|
||||
#include "sql/engine/expr/ob_expr.h"
|
||||
|
||||
namespace oceanbase {
|
||||
namespace sql {
|
||||
class ObPhysicalPlanCtx;
|
||||
// extract accuracy info from %expr and call datum_accuracy_check() below.
|
||||
int datum_accuracy_check(const ObExpr& expr, const uint64_t cast_mode, ObEvalCtx& ctx, const common::ObDatum& in_datum,
|
||||
ObDatum& res_datum, int& warning);
|
||||
|
||||
// check if accuracy in %in_datum is ok. if ok, call res_datum.set_datum(in_datum).
|
||||
// if not, will trunc data in %in_datum and put it in res_datum.
|
||||
// this func makes sure data in %in_datum and %in_datum itself will not be changed.
|
||||
int datum_accuracy_check(const ObExpr& expr, const uint64_t cast_mode, ObEvalCtx& ctx, const common::ObAccuracy& acc,
|
||||
const common::ObDatum& in_datum, ObDatum& res_datum, int& warning);
|
||||
// Check whether str is legal with check_cs_type as the character set
|
||||
// In strict_mode, if the above check fails, an error code is returned
|
||||
// Otherwise, return the maximum legal string with check_cs_type as the character set
|
||||
int string_collation_check(const bool is_strict_mode, const common::ObCollationType check_cs_type,
|
||||
const common::ObObjType str_type, common::ObString& str);
|
||||
|
||||
int ob_datum_to_ob_time_with_date(const common::ObDatum& datum, const common::ObObjType type,
|
||||
const common::ObTimeZoneInfo* tz_info, common::ObTime& ob_time, const int64_t cur_ts_value,
|
||||
bool is_dayofmonth = false);
|
||||
int ob_datum_to_ob_time_without_date(const common::ObDatum& datum, const common::ObObjType type,
|
||||
const common::ObTimeZoneInfo* tz_info, common::ObTime& ob_time);
|
||||
int common_datetime_string(const common::ObObjType in_type, const common::ObObjType out_type,
|
||||
const common::ObScale in_scale, bool force_use_std_nls_format, const int64_t in_val, ObEvalCtx& ctx, char* buf,
|
||||
int64_t buf_len, int64_t& out_len);
|
||||
int padding_char_for_cast(int64_t padding_cnt, const common::ObCollationType& padding_cs_type,
|
||||
common::ObIAllocator& alloc, common::ObString& padding_res);
|
||||
|
||||
class ObDatumHexUtils {
|
||||
public:
|
||||
static int hextoraw_string(const ObExpr& expr, const common::ObString& in_str, ObEvalCtx& ctx, ObDatum& res_datum);
|
||||
static int hextoraw(const ObExpr& expr, const common::ObDatum& in, const common::ObObjType& in_type,
|
||||
const common::ObCollationType& in_cs_type, ObEvalCtx& ctx, ObDatum& res);
|
||||
static int get_uint(const common::ObObjType& in_type, const common::ObDatum& in, common::ObIAllocator& alloc,
|
||||
common::number::ObNumber& out);
|
||||
static int uint_to_raw(
|
||||
const common::number::ObNumber& uint_num, const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum);
|
||||
static int unhex(const ObExpr& expr, const common::ObString& in_str, ObEvalCtx& ctx, ObDatum& res_datum);
|
||||
static int rawtohex(const ObExpr& expr, const common::ObString& in_str, ObEvalCtx& ctx, ObDatum& res_datum);
|
||||
static int hex(const ObExpr& expr, const common::ObString& in_str, ObEvalCtx& ctx, common::ObIAllocator& calc_alloc,
|
||||
ObDatum& res_datum);
|
||||
};
|
||||
|
||||
class ObDatumCast {
|
||||
public:
|
||||
static int get_implicit_cast_function(const common::ObObjType in_type, const common::ObCollationType in_cs_type,
|
||||
const common::ObObjType out_type, const common::ObCollationType out_cs_type, const int64_t cast_mode,
|
||||
ObExpr::EvalFunc& eval_func);
|
||||
static int choose_cast_function(const common::ObObjType in_type, const common::ObCollationType in_cs_type,
|
||||
const common::ObObjType out_type, const common::ObCollationType out_cs_type, const int64_t cast_mode,
|
||||
common::ObIAllocator& allocator, ObExpr& rt_expr);
|
||||
static int get_enumset_cast_function(
|
||||
const common::ObObjTypeClass in_tc, const common::ObObjType out_type, ObExpr::EvalEnumSetFunc& eval_func);
|
||||
static int check_can_cast(const common::ObObjType in_type, const common::ObCollationType in_cs_type,
|
||||
const common::ObObjType out_type, const common::ObCollationType out_cs_type);
|
||||
static int is_trivial_cast(const common::ObObjType in_type, const common::ObCollationType in_cs_type,
|
||||
const common::ObObjType out_type, const common::ObCollationType out_cs_type, const common::ObCastMode& cast_mode,
|
||||
bool& just_eval_arg);
|
||||
|
||||
// The same as:
|
||||
// EXPR_DEFINE_CAST_CTX(expr_ctx, cast_mode)
|
||||
// EXPR_CAST_OBJ_V2(obj_type, obj, res_obj)
|
||||
static int cast_obj(ObEvalCtx& ctx, common::ObIAllocator& alloc, const common::ObObjType& dst_type,
|
||||
const common::ObCollationType& dst_cs_type, const common::ObObj& src_obj, common::ObObj& dst_obj);
|
||||
|
||||
static bool is_implicit_cast(const ObExpr& expr)
|
||||
{
|
||||
bool bret = false;
|
||||
if (T_FUN_SYS_CAST == expr.type_ && CM_IS_IMPLICIT_CAST(expr.extra_)) {
|
||||
bret = true;
|
||||
}
|
||||
return bret;
|
||||
}
|
||||
|
||||
static bool is_explicit_cast(const ObExpr& expr)
|
||||
{
|
||||
bool bret = false;
|
||||
if (T_FUN_SYS_CAST == expr.type_ && CM_IS_EXPLICIT_CAST(expr.extra_)) {
|
||||
bret = true;
|
||||
}
|
||||
return bret;
|
||||
}
|
||||
};
|
||||
|
||||
class ObDatumCaster {
|
||||
public:
|
||||
ObDatumCaster() : inited_(false), eval_ctx_(NULL), cast_expr_(NULL), extra_cast_expr_(NULL)
|
||||
{}
|
||||
~ObDatumCaster()
|
||||
{}
|
||||
|
||||
// init eval_ctx_/cast_expr_/extra_cast_expr_/frame. all mem comes from ObExecContext.
|
||||
// frame layout:
|
||||
// ObDatum | ObDatum | ObDynReserveBuf | res_buf | ObDynReserveBuf | res_buf
|
||||
// res_buf_len is 128
|
||||
int init(ObExecContext& ctx);
|
||||
|
||||
// same with ObObjCaster::to_type().
|
||||
// input is ObExpr, and output is ObDatum, it's better if input is also ObDatum.
|
||||
// we will do this later if necessary.
|
||||
int to_type(const ObDatumMeta& dst_type, const ObExpr& src_expr, const common::ObCastMode& cm, common::ObDatum*& res);
|
||||
// for xxx -> enumset.
|
||||
int to_type(const ObDatumMeta& dst_type, const common::ObIArray<common::ObString>& str_values, const ObExpr& src_expr,
|
||||
const common::ObCastMode& cm, common::ObDatum*& res);
|
||||
|
||||
int destroy();
|
||||
|
||||
private:
|
||||
DISALLOW_COPY_AND_ASSIGN(ObDatumCaster);
|
||||
|
||||
// setup following data member of ObExpr:
|
||||
// datum_meta_, obj_meta_, obj_datum_map_, eval_func_,
|
||||
// args_, arg_cnt_, parents_, parent_cnt_, basic_funcs_.
|
||||
int setup_cast_expr(
|
||||
const ObDatumMeta& dst_type, const ObExpr& src_expr, const common::ObCastMode cm, ObExpr& cast_expr);
|
||||
bool inited_;
|
||||
ObEvalCtx* eval_ctx_;
|
||||
ObExpr* cast_expr_;
|
||||
ObExpr* extra_cast_expr_;
|
||||
};
|
||||
|
||||
} // namespace sql
|
||||
} // namespace oceanbase
|
||||
|
||||
#endif // _OB_EXPR_DATUM_CAST_
|
||||
Reference in New Issue
Block a user