greenplumn CIndexQualInfo 源码
greenplumn CIndexQualInfo 代码
文件路径：/src/include/gpopt/translate/CIndexQualInfo.h
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2013 EMC Corp.
//
// @filename:
// CIndexQualInfo.h
//
// @doc:
// Class providing access to the original index qual expression, its modified
// version tailored for GPDB, and index strategy
//
// @test:
//
//
//---------------------------------------------------------------------------
#ifndef GPDXL_CIndexQualInfo_H
#define GPDXL_CIndexQualInfo_H
extern "C" {
#include "postgres.h"
}
namespace gpdxl
{
using namespace gpopt;
class CDXLNode;
//---------------------------------------------------------------------------
// @class:
// CIndexQualInfo
//
// @doc:
// Class providing access to the original index qual expression, its modified
// version tailored for GPDB, and index strategy
//
//---------------------------------------------------------------------------
class CIndexQualInfo
{
public:
// attribute number in the index
AttrNumber m_attno;
// index qual expression tailored for GPDB
Expr *m_expr;
// original index qual expression
Expr *m_original_expr;
// index strategy information
StrategyNumber m_strategy_num;
// index subtype
OID m_index_subtype_oid;
// ctor
CIndexQualInfo(AttrNumber attno, Expr *expr, Expr *original_expr,
StrategyNumber strategy_number, OID index_subtype_oid)
: m_attno(attno),
m_expr(expr),
m_original_expr(original_expr),
m_strategy_num(strategy_number),
m_index_subtype_oid(index_subtype_oid)
{
GPOS_ASSERT((IsA(m_expr, OpExpr) && IsA(m_original_expr, OpExpr)) ||
(IsA(m_expr, ScalarArrayOpExpr) &&
IsA(original_expr, ScalarArrayOpExpr)));
}
// dtor
~CIndexQualInfo() = default;
// comparison function for sorting index qualifiers
static INT
IndexQualInfoCmp(const void *p1, const void *p2)
{
const CIndexQualInfo *qual_info1 = *(const CIndexQualInfo **) p1;
const CIndexQualInfo *qual_info2 = *(const CIndexQualInfo **) p2;
return (INT) qual_info1->m_attno - (INT) qual_info2->m_attno;
}
};
// array of index qual info
using CIndexQualInfoArray = CDynamicPtrArray<CIndexQualInfo, CleanupDelete>;
} // namespace gpdxl
#endif // !GPDXL_CIndexQualInfo_H
// EOF
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