greenplumn CScalarArrayCoerceExpr 源码
greenplumn CScalarArrayCoerceExpr 代码
文件路径：/src/backend/gporca/libgpopt/include/gpopt/operators/CScalarArrayCoerceExpr.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2017 VMware, Inc. or its affiliates.
//
// @filename:
// CScalarArrayCoerceExpr.h
//
// @doc:
// Scalar Array Coerce Expr operator,
// the operator will apply type casting for each element in this array
// using the given element coercion function.
//
// @owner:
//
// @test:
//
//
//---------------------------------------------------------------------------
#ifndef GPOPT_CScalarArrayCoerceExpr_H
#define GPOPT_CScalarArrayCoerceExpr_H
#include "gpos/base.h"
#include "gpopt/operators/CScalarCoerceBase.h"
namespace gpopt
{
using namespace gpos;
//---------------------------------------------------------------------------
// @class:
// CScalarArrayCoerceExpr
//
// @doc:
// Scalar Array Coerce Expr operator
//
//---------------------------------------------------------------------------
class CScalarArrayCoerceExpr : public CScalarCoerceBase
{
private:
// catalog MDId of the element function
IMDId *m_pmdidElementFunc;
// conversion semantics flag to pass to func
BOOL m_is_explicit;
public:
CScalarArrayCoerceExpr(const CScalarArrayCoerceExpr &) = delete;
// ctor
CScalarArrayCoerceExpr(CMemoryPool *mp, IMDId *element_func,
IMDId *result_type_mdid, INT type_modifier,
BOOL is_explicit, ECoercionForm dxl_coerce_format,
INT location);
// dtor
~CScalarArrayCoerceExpr() override;
// return metadata id of element coerce function
IMDId *PmdidElementFunc() const;
BOOL IsExplicit() const;
EOperatorId Eopid() const override;
// return a string for operator name
const CHAR *SzId() const override;
// match function
BOOL Matches(COperator *pop) const override;
// sensitivity to order of inputs
BOOL FInputOrderSensitive() const override;
// conversion function
static CScalarArrayCoerceExpr *PopConvert(COperator *pop);
}; // class CScalarArrayCoerceExpr
} // namespace gpopt
#endif // !GPOPT_CScalarArrayCoerceExpr_H
// EOF
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