greenplumn CJobGroup 源码
greenplumn CJobGroup 代码
文件路径：/src/backend/gporca/libgpopt/src/search/CJobGroup.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 Greenplum, Inc.
//
// @filename:
// CJobGroup.cpp
//
// @doc:
// Implementation of group job superclass
//---------------------------------------------------------------------------
#include "gpopt/search/CJobGroup.h"
#include "gpopt/search/CGroupProxy.h"
#include "gpopt/search/CJobFactory.h"
#include "gpopt/search/CJobGroupExpressionExploration.h"
#include "gpopt/search/CJobGroupExpressionImplementation.h"
using namespace gpopt;
//---------------------------------------------------------------------------
// @function:
// CJobGroup::Init
//
// @doc:
// Initialize job
//
//---------------------------------------------------------------------------
void
CJobGroup::Init(CGroup *pgroup)
{
GPOS_ASSERT(!FInit());
GPOS_ASSERT(nullptr != pgroup);
m_pgroup = pgroup;
m_pgexprLastScheduled = nullptr;
}
//---------------------------------------------------------------------------
// @function:
// CJobGroup::PgexprFirstUnschedNonLogical
//
// @doc:
// Get first non-logical group expression with an unscheduled job
//
//---------------------------------------------------------------------------
CGroupExpression *
CJobGroup::PgexprFirstUnschedNonLogical()
{
CGroupExpression *pgexpr = nullptr;
{
CGroupProxy gp(m_pgroup);
if (nullptr == m_pgexprLastScheduled)
{
// get first group expression
pgexpr = gp.PgexprSkipLogical(nullptr /*pgexpr*/);
}
else
{
// get group expression next to last scheduled one
pgexpr = gp.PgexprSkipLogical(m_pgexprLastScheduled);
}
}
return pgexpr;
}
//---------------------------------------------------------------------------
// @function:
// CJobGroup::PgexprFirstUnschedLogical
//
// @doc:
// Get first logical group expression with an unscheduled job
//
//---------------------------------------------------------------------------
CGroupExpression *
CJobGroup::PgexprFirstUnschedLogical()
{
CGroupExpression *pgexpr = nullptr;
{
CGroupProxy gp(m_pgroup);
if (nullptr == m_pgexprLastScheduled)
{
// get first group expression
pgexpr = gp.PgexprFirst();
}
else
{
// get group expression next to last scheduled one
pgexpr = gp.PgexprNext(m_pgexprLastScheduled);
}
}
return pgexpr;
}
// EOF
相关信息
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greenplumn CGroupExpression 源码
greenplumn CJobGroupExploration 源码
greenplumn CJobGroupExpression 源码
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