//---------------------------------------------------------------------------
// @function:
// CMDIdGPDB::CMDIdGPDB
//
// @doc:
// Copy constructor
//
//---------------------------------------------------------------------------
CMDIdGPDB::CMDIdGPDB
(
const CMDIdGPDB &mdidSource
)
:
IMDId(),
m_sysid(mdidSource.Sysid()),
m_oid(mdidSource.OidObjectId()),
m_ulVersionMajor(mdidSource.UlVersionMajor()),
m_ulVersionMinor(mdidSource.UlVersionMinor()),
m_str(m_wszBuffer, GPOS_ARRAY_SIZE(m_wszBuffer))
{
GPOS_ASSERT(mdidSource.FValid());
GPOS_ASSERT(IMDId::EmdidGPDB == mdidSource.Emdidt());
// serialize mdid into static string
Serialize();
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorDXLToQuery::PrteFromTblDescr
//
// @doc:
// Translates a DXL table descriptor into a range table entry
//
//---------------------------------------------------------------------------
RangeTblEntry *
CTranslatorDXLToQuery::PrteFromTblDescr
(
const CDXLTableDescr *pdxltabdesc,
Index iRel,
CStateDXLToQuery *pstatedxltoquery,
CMappingColIdVarQuery *pmapcidvarquery
)
{
GPOS_ASSERT(0 == pstatedxltoquery->UlLength());
RangeTblEntry *prte = MakeNode(RangeTblEntry);
prte->rtekind = RTE_RELATION;
// get oid for table
CMDIdGPDB *pmdid = CMDIdGPDB::PmdidConvert(pdxltabdesc->Pmdid());
prte->relid = pmdid->OidObjectId();
Alias *palias = MakeNode(Alias);
palias->colnames = NIL;
// get table alias
palias->aliasname = CTranslatorUtils::SzFromWsz(pdxltabdesc->Pmdname()->Pstr()->Wsz());
// get column names
const ULONG ulArity = pdxltabdesc->UlArity();
for (ULONG ul = 0; ul < ulArity; ++ul)
{
const CDXLColDescr *pdxlcd = pdxltabdesc->Pdxlcd(ul);
CHAR *szColName = CTranslatorUtils::SzFromWsz(pdxlcd->Pmdname()->Pstr()->Wsz());
GPOS_ASSERT(NULL != pdxlcd);
GPOS_ASSERT(0 != pdxlcd->IAttno());
Value *pvalColName = gpdb::PvalMakeString(szColName);
palias->colnames = gpdb::PlAppendElement(palias->colnames, pvalColName);
const CMDIdGPDB *pmdidColType = CMDIdGPDB::PmdidConvert(pdxlcd->PmdidType());
OID oidAttType = pmdidColType->OidObjectId();
GPOS_ASSERT(InvalidOid != oidAttType);
Var *pvar = gpdb::PvarMakeVar
(
iRel,
(AttrNumber) pdxlcd->IAttno(),
oidAttType,
-1, // vartypmod
0
);
TargetEntry *pte = MakeNode(TargetEntry);
pte->expr = (Expr*) pvar;
pte->resname = szColName;
pte->resno = (AttrNumber) pdxlcd->IAttno();
//save mapping col id -> Var in the query translation context
pmapcidvarquery->FInsertMapping(pdxlcd->UlID(), pte);
pstatedxltoquery->AddOutputColumnEntry(pte, pte->resname, pdxlcd->UlID());
}
prte->eref = palias;
return prte;
}
