greenplumn CTranslatorScalarToDXL 源码
greenplumn CTranslatorScalarToDXL 代码
文件路径：/src/backend/gpopt/translate/CTranslatorScalarToDXL.cpp
//---------------------------------------------------------------------------
// Greenplum Database
// Copyright (C) 2011 Greenplum, Inc.
//
// @filename:
// CTranslatorScalarToDXL.cpp
//
// @doc:
// Implementing the methods needed to translate a GPDB Scalar Operation (in a Query / PlStmt object)
// into a DXL trees
//
// @test:
//
//---------------------------------------------------------------------------
extern "C" {
#include "postgres.h"
#include "nodes/parsenodes.h"
#include "nodes/plannodes.h"
#include "nodes/primnodes.h"
#include "utils/date.h"
#include "utils/datum.h"
#include "utils/uuid.h"
}
#include <vector>
#include "gpos/base.h"
#include "gpos/common/CAutoP.h"
#include "gpos/string/CWStringDynamic.h"
#include "gpopt/base/CUtils.h"
#include "gpopt/gpdbwrappers.h"
#include "gpopt/mdcache/CMDAccessor.h"
#include "gpopt/translate/CCTEListEntry.h"
#include "gpopt/translate/CTranslatorQueryToDXL.h"
#include "gpopt/translate/CTranslatorScalarToDXL.h"
#include "gpopt/translate/CTranslatorUtils.h"
#include "naucrates/dxl/CDXLUtils.h"
#include "naucrates/dxl/operators/CDXLDatumBool.h"
#include "naucrates/dxl/operators/CDXLDatumInt2.h"
#include "naucrates/dxl/operators/CDXLDatumInt4.h"
#include "naucrates/dxl/operators/CDXLDatumInt8.h"
#include "naucrates/dxl/operators/CDXLDatumOid.h"
#include "naucrates/dxl/operators/CDXLScalarAggref.h"
#include "naucrates/dxl/operators/CDXLScalarArray.h"
#include "naucrates/dxl/operators/CDXLScalarArrayCoerceExpr.h"
#include "naucrates/dxl/operators/CDXLScalarArrayComp.h"
#include "naucrates/dxl/operators/CDXLScalarArrayRef.h"
#include "naucrates/dxl/operators/CDXLScalarBooleanTest.h"
#include "naucrates/dxl/operators/CDXLScalarCaseTest.h"
#include "naucrates/dxl/operators/CDXLScalarCast.h"
#include "naucrates/dxl/operators/CDXLScalarCoalesce.h"
#include "naucrates/dxl/operators/CDXLScalarCoerceToDomain.h"
#include "naucrates/dxl/operators/CDXLScalarCoerceViaIO.h"
#include "naucrates/dxl/operators/CDXLScalarDistinctComp.h"
#include "naucrates/dxl/operators/CDXLScalarFilter.h"
#include "naucrates/dxl/operators/CDXLScalarFuncExpr.h"
#include "naucrates/dxl/operators/CDXLScalarIdent.h"
#include "naucrates/dxl/operators/CDXLScalarIfStmt.h"
#include "naucrates/dxl/operators/CDXLScalarJoinFilter.h"
#include "naucrates/dxl/operators/CDXLScalarMinMax.h"
#include "naucrates/dxl/operators/CDXLScalarNullIf.h"
#include "naucrates/dxl/operators/CDXLScalarNullTest.h"
#include "naucrates/dxl/operators/CDXLScalarOneTimeFilter.h"
#include "naucrates/dxl/operators/CDXLScalarOpExpr.h"
#include "naucrates/dxl/operators/CDXLScalarProjElem.h"
#include "naucrates/dxl/operators/CDXLScalarSortGroupClause.h"
#include "naucrates/dxl/operators/CDXLScalarSubquery.h"
#include "naucrates/dxl/operators/CDXLScalarSubqueryAll.h"
#include "naucrates/dxl/operators/CDXLScalarSubqueryAny.h"
#include "naucrates/dxl/operators/CDXLScalarSubqueryExists.h"
#include "naucrates/dxl/operators/CDXLScalarSwitch.h"
#include "naucrates/dxl/operators/CDXLScalarSwitchCase.h"
#include "naucrates/dxl/operators/CDXLScalarValuesList.h"
#include "naucrates/dxl/operators/CDXLScalarWindowFrameEdge.h"
#include "naucrates/dxl/operators/CDXLScalarWindowRef.h"
#include "naucrates/dxl/xml/dxltokens.h"
#include "naucrates/exception.h"
#include "naucrates/md/CMDTypeGenericGPDB.h"
#include "naucrates/md/IMDAggregate.h"
#include "naucrates/md/IMDScalarOp.h"
#include "naucrates/md/IMDType.h"
using namespace gpdxl;
using namespace gpopt;
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CTranslatorScalarToDXL
//
// @doc:
// Ctor
//---------------------------------------------------------------------------
CTranslatorScalarToDXL::CTranslatorScalarToDXL(CContextQueryToDXL *context,
CMDAccessor *md_accessor,
ULONG query_level,
HMUlCTEListEntry *cte_entries,
CDXLNodeArray *cte_dxlnode_array)
: m_context(context),
m_mp(context->m_mp),
m_md_accessor(md_accessor),
m_query_level(query_level),
m_op_type(EpspotNone),
m_cte_entries(cte_entries),
m_cte_producers(cte_dxlnode_array)
{
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CTranslatorScalarToDXL
//
// @doc:
// Private constructor for TranslateStandaloneExprToDXL
//---------------------------------------------------------------------------
CTranslatorScalarToDXL::CTranslatorScalarToDXL(CMemoryPool *mp,
CMDAccessor *mda)
: m_context(nullptr),
m_mp(mp),
m_md_accessor(mda),
m_query_level(0),
m_op_type(EpspotNone),
m_cte_entries(nullptr),
m_cte_producers(nullptr)
{
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateSubqueryTranslator
//
// @doc:
// Construct a new CTranslatorQueryToDXL object, for translating
// a subquery of the current query.
//---------------------------------------------------------------------------
CTranslatorQueryToDXL *
CTranslatorScalarToDXL::CreateSubqueryTranslator(
Query *subquery, const CMappingVarColId *var_colid_mapping)
{
if (m_context == nullptr)
{
// This is a stand-alone expression. Subqueries are not allowed.
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLError,
GPOS_WSZ_LIT("Subquery in a stand-alone expression"));
}
return GPOS_NEW(m_context->m_mp)
CTranslatorQueryToDXL(m_context, m_md_accessor, var_colid_mapping,
subquery, m_query_level + 1,
false, // is_top_query_dml
m_cte_entries);
}
CDXLNode *
CTranslatorScalarToDXL::TranslateStandaloneExprToDXL(
CMemoryPool *mp, CMDAccessor *mda,
const CMappingVarColId *var_colid_mapping, const Expr *expr)
{
CTranslatorScalarToDXL scalar_translator(mp, mda);
return scalar_translator.TranslateScalarToDXL(expr, var_colid_mapping);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::EdxlbooltypeFromGPDBBoolType
//
// @doc:
// Return the EdxlBoolExprType for a given GPDB BoolExprType
//---------------------------------------------------------------------------
EdxlBoolExprType
CTranslatorScalarToDXL::EdxlbooltypeFromGPDBBoolType(BoolExprType boolexprtype)
{
static ULONG mapping[][2] = {
{NOT_EXPR, Edxlnot},
{AND_EXPR, Edxland},
{OR_EXPR, Edxlor},
};
EdxlBoolExprType type = EdxlBoolExprTypeSentinel;
const ULONG arity = GPOS_ARRAY_SIZE(mapping);
for (ULONG ul = 0; ul < arity; ul++)
{
ULONG *elem = mapping[ul];
if ((ULONG) boolexprtype == elem[0])
{
type = (EdxlBoolExprType) elem[1];
break;
}
}
GPOS_ASSERT(EdxlBoolExprTypeSentinel != type && "Invalid bool expr type");
return type;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateVarToDXL
//
// @doc:
// Create a DXL node for a scalar ident expression from a GPDB Var expression.
// This function can be used for constructing a scalar ident operator appearing in a
// base node (e.g. a scan node) or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateVarToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, Var));
const Var *var = (Var *) expr;
if (var->varattno == 0)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Whole-row variable"));
}
// column name
const CWStringBase *str =
var_colid_mapping->GetOptColName(m_query_level, var, m_op_type);
// column id
ULONG id;
if (var->varattno != 0 || EpspotIndexScan == m_op_type ||
EpspotIndexOnlyScan == m_op_type)
{
id = var_colid_mapping->GetColId(m_query_level, var, m_op_type);
}
else
{
if (m_context == nullptr)
{
GPOS_RAISE(
gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT(
"Var with no existing mapping in a stand-alone context"));
}
id = m_context->m_colid_counter->next_id();
}
CMDName *mdname = GPOS_NEW(m_mp) CMDName(m_mp, str);
// create a column reference for the given var
CDXLColRef *dxl_colref = GPOS_NEW(m_mp) CDXLColRef(
mdname, id, GPOS_NEW(m_mp) CMDIdGPDB(var->vartype), var->vartypmod);
// create the scalar ident operator
CDXLScalarIdent *scalar_ident =
GPOS_NEW(m_mp) CDXLScalarIdent(m_mp, dxl_colref);
// create the DXL node holding the scalar ident operator
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, scalar_ident);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateScalarToDXL
//
// @doc:
// Create a DXL node for a scalar expression from a GPDB expression node.
// This function can be used for constructing a scalar operator appearing in a
// base node (e.g. a scan node), or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateScalarToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
NodeTag tag = expr->type;
switch (tag)
{
default:
{
// This expression is not supported. Check for a few common cases, to
// give a better message.
CHAR *str = (CHAR *) gpdb::NodeToString(const_cast<Expr *>(expr));
CWStringDynamic *wcstr =
CDXLUtils::CreateDynamicStringFromCharArray(m_mp, str);
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiPlStmt2DXLConversion,
wcstr->GetBuffer());
}
case T_Param:
{
// Note: The choose_custom_plan() function in plancache.c
// knows that GPORCA doesn't support Params. If you lift this
// limitation, adjust choose_custom_plan() accordingly!
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiPlStmt2DXLConversion,
GPOS_WSZ_LIT("Query Parameter"));
}
case T_Var:
{
return CTranslatorScalarToDXL::TranslateVarToDXL(expr,
var_colid_mapping);
}
case T_OpExpr:
{
return CTranslatorScalarToDXL::TranslateOpExprToDXL(
expr, var_colid_mapping);
}
case T_ScalarArrayOpExpr:
{
return CTranslatorScalarToDXL::TranslateScalarArrayOpExprToDXL(
expr, var_colid_mapping);
}
case T_DistinctExpr:
{
return CTranslatorScalarToDXL::TranslateDistinctExprToDXL(
expr, var_colid_mapping);
}
case T_Const:
{
return CTranslatorScalarToDXL::TranslateConstToDXL(
expr, var_colid_mapping);
}
case T_BoolExpr:
{
return CTranslatorScalarToDXL::TranslateBoolExprToDXL(
expr, var_colid_mapping);
}
case T_BooleanTest:
{
return CTranslatorScalarToDXL::TranslateBooleanTestToDXL(
expr, var_colid_mapping);
}
case T_CaseExpr:
{
return CTranslatorScalarToDXL::TranslateCaseExprToDXL(
expr, var_colid_mapping);
}
case T_CaseTestExpr:
{
return CTranslatorScalarToDXL::TranslateCaseTestExprToDXL(
expr, var_colid_mapping);
}
case T_CoalesceExpr:
{
return CTranslatorScalarToDXL::TranslateCoalesceExprToDXL(
expr, var_colid_mapping);
}
case T_MinMaxExpr:
{
return CTranslatorScalarToDXL::TranslateMinMaxExprToDXL(
expr, var_colid_mapping);
}
case T_FuncExpr:
{
return CTranslatorScalarToDXL::TranslateFuncExprToDXL(
expr, var_colid_mapping);
}
case T_Aggref:
{
return CTranslatorScalarToDXL::TranslateAggrefToDXL(
expr, var_colid_mapping);
}
case T_WindowFunc:
{
return CTranslatorScalarToDXL::TranslateWindowFuncToDXL(
expr, var_colid_mapping);
}
case T_NullTest:
{
return CTranslatorScalarToDXL::TranslateNullTestToDXL(
expr, var_colid_mapping);
}
case T_NullIfExpr:
{
return CTranslatorScalarToDXL::TranslateNullIfExprToDXL(
expr, var_colid_mapping);
}
case T_RelabelType:
{
return CTranslatorScalarToDXL::TranslateRelabelTypeToDXL(
expr, var_colid_mapping);
}
case T_CoerceToDomain:
{
return CTranslatorScalarToDXL::TranslateCoerceToDomainToDXL(
expr, var_colid_mapping);
}
case T_CoerceViaIO:
{
return CTranslatorScalarToDXL::TranslateCoerceViaIOToDXL(
expr, var_colid_mapping);
}
case T_ArrayCoerceExpr:
{
return CTranslatorScalarToDXL::TranslateArrayCoerceExprToDXL(
expr, var_colid_mapping);
}
case T_SubLink:
{
return CTranslatorScalarToDXL::TranslateSubLinkToDXL(
expr, var_colid_mapping);
}
case T_ArrayExpr:
{
return CTranslatorScalarToDXL::TranslateArrayExprToDXL(
expr, var_colid_mapping);
}
case T_SubscriptingRef:
{
return CTranslatorScalarToDXL::TranslateArrayRefToDXL(
expr, var_colid_mapping);
}
case T_SortGroupClause:
{
return CTranslatorScalarToDXL::TranslateSortGroupClauseToDXL(
expr, var_colid_mapping);
}
}
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateDistinctExprToDXL
//
// @doc:
// Create a DXL node for a scalar distinct comparison expression from a GPDB
// DistinctExpr.
// This function can be used for constructing a scalar comparison operator appearing in a
// base node (e.g. a scan node), or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateDistinctExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, DistinctExpr));
const DistinctExpr *distinct_expr = (DistinctExpr *) expr;
// process arguments of op expr
GPOS_ASSERT(2 == gpdb::ListLength(distinct_expr->args));
CDXLNode *left_node = TranslateScalarToDXL(
(Expr *) gpdb::ListNth(distinct_expr->args, 0), var_colid_mapping);
CDXLNode *right_node = TranslateScalarToDXL(
(Expr *) gpdb::ListNth(distinct_expr->args, 1), var_colid_mapping);
GPOS_ASSERT(nullptr != left_node);
GPOS_ASSERT(nullptr != right_node);
CDXLScalarDistinctComp *dxlop = GPOS_NEW(m_mp) CDXLScalarDistinctComp(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(distinct_expr->opno));
// create the DXL node holding the scalar distinct comparison operator
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
// add children in the right order
dxlnode->AddChild(left_node);
dxlnode->AddChild(right_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateScalarCmpFromOpExpr
//
// @doc:
// Create a DXL node for a scalar comparison expression from a GPDB OpExpr.
// This function can be used for constructing a scalar comparison operator appearing in a
// base node (e.g. a scan node), or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateScalarCmpFromOpExpr(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, OpExpr));
const OpExpr *op_expr = (OpExpr *) expr;
// process arguments of op expr
GPOS_ASSERT(2 == gpdb::ListLength(op_expr->args));
Expr *left_expr = (Expr *) gpdb::ListNth(op_expr->args, 0);
Expr *right_expr = (Expr *) gpdb::ListNth(op_expr->args, 1);
CDXLNode *left_node = TranslateScalarToDXL(left_expr, var_colid_mapping);
CDXLNode *right_node = TranslateScalarToDXL(right_expr, var_colid_mapping);
GPOS_ASSERT(nullptr != left_node);
GPOS_ASSERT(nullptr != right_node);
CMDIdGPDB *mdid = GPOS_NEW(m_mp) CMDIdGPDB(op_expr->opno);
// get operator name
const CWStringConst *str = GetDXLArrayCmpType(mdid);
CDXLScalarComp *dxlop = GPOS_NEW(m_mp) CDXLScalarComp(
m_mp, mdid, GPOS_NEW(m_mp) CWStringConst(str->GetBuffer()));
// create the DXL node holding the scalar comparison operator
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
// add children in the right order
dxlnode->AddChild(left_node);
dxlnode->AddChild(right_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateOpExprToDXL
//
// @doc:
// Create a DXL node for a scalar opexpr from a GPDB OpExpr.
// This function can be used for constructing a scalar opexpr operator appearing in a
// base node (e.g. a scan node), or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateOpExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, OpExpr));
const OpExpr *op_expr = (OpExpr *) expr;
// check if this is a scalar comparison
CMDIdGPDB *return_type_mdid =
GPOS_NEW(m_mp) CMDIdGPDB(((OpExpr *) expr)->opresulttype);
const IMDType *md_type = m_md_accessor->RetrieveType(return_type_mdid);
const ULONG num_args = gpdb::ListLength(op_expr->args);
if (IMDType::EtiBool == md_type->GetDatumType() && 2 == num_args)
{
return_type_mdid->Release();
return CreateScalarCmpFromOpExpr(expr, var_colid_mapping);
}
// get operator name and id
IMDId *mdid = GPOS_NEW(m_mp) CMDIdGPDB(op_expr->opno);
const CWStringConst *str = GetDXLArrayCmpType(mdid);
CDXLScalarOpExpr *dxlop = GPOS_NEW(m_mp)
CDXLScalarOpExpr(m_mp, mdid, return_type_mdid,
GPOS_NEW(m_mp) CWStringConst(str->GetBuffer()));
// create the DXL node holding the scalar opexpr
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
// process arguments
TranslateScalarChildren(dxlnode, op_expr->args, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateNullIfExprToDXL
//
// @doc:
// Create a DXL node for a scalar nullif from a GPDB Expr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateNullIfExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, NullIfExpr));
const NullIfExpr *null_if_expr = (NullIfExpr *) expr;
GPOS_ASSERT(2 == gpdb::ListLength(null_if_expr->args));
CDXLScalarNullIf *dxlop = GPOS_NEW(m_mp)
CDXLScalarNullIf(m_mp, GPOS_NEW(m_mp) CMDIdGPDB(null_if_expr->opno),
GPOS_NEW(m_mp) CMDIdGPDB(null_if_expr->opresulttype));
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
// process arguments
TranslateScalarChildren(dxlnode, null_if_expr->args, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateScalarArrayOpExprToDXL
//
// @doc:
// Create a DXL node for a scalar array expression from a GPDB OpExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateScalarArrayOpExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
return CreateScalarArrayCompFromExpr(expr, var_colid_mapping);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateScalarArrayCompFromExpr
//
// @doc:
// Create a DXL node for a scalar array comparison from a GPDB OpExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateScalarArrayCompFromExpr(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, ScalarArrayOpExpr));
const ScalarArrayOpExpr *scalar_array_op_expr = (ScalarArrayOpExpr *) expr;
// process arguments of op expr
GPOS_ASSERT(2 == gpdb::ListLength(scalar_array_op_expr->args));
Expr *left_expr = (Expr *) gpdb::ListNth(scalar_array_op_expr->args, 0);
CDXLNode *left_node = TranslateScalarToDXL(left_expr, var_colid_mapping);
Expr *right_expr = (Expr *) gpdb::ListNth(scalar_array_op_expr->args, 1);
// If the argument array is an array Const, try to transform it to an
// ArrayExpr, to allow ORCA to optimize it better. (ORCA knows how to
// extract elements of an ArrayExpr, but doesn't currently know how
// to do it from an array-typed Const.)
if (IsA(right_expr, Const))
{
right_expr = gpdb::TransformArrayConstToArrayExpr((Const *) right_expr);
}
CDXLNode *right_node = TranslateScalarToDXL(right_expr, var_colid_mapping);
GPOS_ASSERT(nullptr != left_node);
GPOS_ASSERT(nullptr != right_node);
// get operator name
CMDIdGPDB *mdid_op = GPOS_NEW(m_mp) CMDIdGPDB(scalar_array_op_expr->opno);
const IMDScalarOp *md_scalar_op = m_md_accessor->RetrieveScOp(mdid_op);
mdid_op->Release();
const CWStringConst *op_name = md_scalar_op->Mdname().GetMDName();
GPOS_ASSERT(nullptr != op_name);
EdxlArrayCompType type = Edxlarraycomptypeany;
if (!scalar_array_op_expr->useOr)
{
type = Edxlarraycomptypeall;
}
CDXLScalarArrayComp *dxlop = GPOS_NEW(m_mp) CDXLScalarArrayComp(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(scalar_array_op_expr->opno),
GPOS_NEW(m_mp) CWStringConst(op_name->GetBuffer()), type);
// create the DXL node holding the scalar opexpr
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
// add children in the right order
dxlnode->AddChild(left_node);
dxlnode->AddChild(right_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateConstToDXL
//
// @doc:
// Create a DXL node for a scalar const value from a GPDB Const
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateConstToDXL(
const Expr *expr,
const CMappingVarColId * // var_colid_mapping
)
{
GPOS_ASSERT(IsA(expr, Const));
const Const *constant = (Const *) expr;
CDXLNode *dxlnode =
GPOS_NEW(m_mp) CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarConstValue(
m_mp, TranslateConstToDXL(constant)));
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateConstToDXL
//
// @doc:
// Create a DXL datum from a GPDB Const
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateConstToDXL(CMemoryPool *mp, CMDAccessor *mda,
const Const *constant)
{
CMDIdGPDB *mdid = GPOS_NEW(mp) CMDIdGPDB(constant->consttype);
const IMDType *md_type = mda->RetrieveType(mdid);
mdid->Release();
// translate gpdb datum into a DXL datum
CDXLDatum *datum_dxl = CTranslatorScalarToDXL::TranslateDatumToDXL(
mp, md_type, constant->consttypmod, constant->constisnull,
constant->constlen, constant->constvalue);
return datum_dxl;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateConstToDXL
//
// @doc:
// Create a DXL datum from a GPDB Const
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateConstToDXL(const Const *constant) const
{
return TranslateConstToDXL(m_mp, m_md_accessor, constant);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateBoolExprToDXL
//
// @doc:
// Create a DXL node for a scalar boolean expression from a GPDB OpExpr.
// This function can be used for constructing a scalar boolexpr operator appearing in a
// base node (e.g. a scan node), or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateBoolExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, BoolExpr));
const BoolExpr *bool_expr = (BoolExpr *) expr;
GPOS_ASSERT(0 < gpdb::ListLength(bool_expr->args));
EdxlBoolExprType type = EdxlbooltypeFromGPDBBoolType(bool_expr->boolop);
GPOS_ASSERT(EdxlBoolExprTypeSentinel != type);
// create the DXL node holding the scalar boolean operator
CDXLNode *dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarBoolExpr(m_mp, type));
ULONG count = gpdb::ListLength(bool_expr->args);
if ((NOT_EXPR != bool_expr->boolop) && (2 > count))
{
GPOS_RAISE(
gpdxl::ExmaDXL, gpdxl::ExmiPlStmt2DXLConversion,
GPOS_WSZ_LIT(
"Boolean Expression (OR / AND): Incorrect Number of Children "));
}
else if ((NOT_EXPR == bool_expr->boolop) && (1 != count))
{
GPOS_RAISE(
gpdxl::ExmaDXL, gpdxl::ExmiPlStmt2DXLConversion,
GPOS_WSZ_LIT(
"Boolean Expression (NOT): Incorrect Number of Children "));
}
TranslateScalarChildren(dxlnode, bool_expr->args, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateBooleanTestToDXL
//
// @doc:
// Create a DXL node for a scalar boolean test from a GPDB OpExpr.
// This function can be used for constructing a scalar boolexpr operator appearing in a
// base node (e.g. a scan node), or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateBooleanTestToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, BooleanTest));
const BooleanTest *boolean_test = (BooleanTest *) expr;
GPOS_ASSERT(nullptr != boolean_test->arg);
static ULONG mapping[][2] = {
{IS_TRUE, EdxlbooleantestIsTrue},
{IS_NOT_TRUE, EdxlbooleantestIsNotTrue},
{IS_FALSE, EdxlbooleantestIsFalse},
{IS_NOT_FALSE, EdxlbooleantestIsNotFalse},
{IS_UNKNOWN, EdxlbooleantestIsUnknown},
{IS_NOT_UNKNOWN, EdxlbooleantestIsNotUnknown},
};
EdxlBooleanTestType type = EdxlbooleantestSentinel;
const ULONG arity = GPOS_ARRAY_SIZE(mapping);
for (ULONG ul = 0; ul < arity; ul++)
{
ULONG *elem = mapping[ul];
if ((ULONG) boolean_test->booltesttype == elem[0])
{
type = (EdxlBooleanTestType) elem[1];
break;
}
}
GPOS_ASSERT(EdxlbooleantestSentinel != type && "Invalid boolean test type");
// create the DXL node holding the scalar boolean test operator
CDXLNode *dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarBooleanTest(m_mp, type));
CDXLNode *dxlnode_arg =
TranslateScalarToDXL(boolean_test->arg, var_colid_mapping);
GPOS_ASSERT(nullptr != dxlnode_arg);
dxlnode->AddChild(dxlnode_arg);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateNullTestToDXL
//
// @doc:
// Create a DXL node for a scalar nulltest expression from a GPDB OpExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateNullTestToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, NullTest));
const NullTest *null_test = (NullTest *) expr;
GPOS_ASSERT(nullptr != null_test->arg);
CDXLNode *child_node =
TranslateScalarToDXL(null_test->arg, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
GPOS_ASSERT(IS_NULL == null_test->nulltesttype ||
IS_NOT_NULL == null_test->nulltesttype);
BOOL is_null = false;
if (IS_NULL == null_test->nulltesttype)
{
is_null = true;
}
// create the DXL node holding the scalar NullTest operator
CDXLNode *dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarNullTest(m_mp, is_null));
dxlnode->AddChild(child_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateCoalesceExprToDXL
//
// @doc:
// Create a DXL node for a coalesce function from a GPDB OpExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateCoalesceExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, CoalesceExpr));
CoalesceExpr *coalesce_expr = (CoalesceExpr *) expr;
GPOS_ASSERT(nullptr != coalesce_expr->args);
CDXLScalarCoalesce *dxlop = GPOS_NEW(m_mp) CDXLScalarCoalesce(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(coalesce_expr->coalescetype));
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
TranslateScalarChildren(dxlnode, coalesce_expr->args, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateMinMaxExprToDXL
//
// @doc:
// Create a DXL node for a min/max operator from a GPDB OpExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateMinMaxExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, MinMaxExpr));
MinMaxExpr *min_max_expr = (MinMaxExpr *) expr;
GPOS_ASSERT(nullptr != min_max_expr->args);
CDXLScalarMinMax::EdxlMinMaxType min_max_type =
CDXLScalarMinMax::EmmtSentinel;
if (IS_GREATEST == min_max_expr->op)
{
min_max_type = CDXLScalarMinMax::EmmtMax;
}
else
{
GPOS_ASSERT(IS_LEAST == min_max_expr->op);
min_max_type = CDXLScalarMinMax::EmmtMin;
}
CDXLScalarMinMax *dxlop = GPOS_NEW(m_mp) CDXLScalarMinMax(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(min_max_expr->minmaxtype), min_max_type);
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
TranslateScalarChildren(dxlnode, min_max_expr->args, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateScalarChildren
//
// @doc:
// Translate list elements and add them as children of the DXL node
//---------------------------------------------------------------------------
void
CTranslatorScalarToDXL::TranslateScalarChildren(
CDXLNode *dxlnode, List *list, const CMappingVarColId *var_colid_mapping)
{
ListCell *lc = nullptr;
ForEach(lc, list)
{
Expr *child_expr = (Expr *) lfirst(lc);
CDXLNode *child_node =
TranslateScalarToDXL(child_expr, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
dxlnode->AddChild(child_node);
}
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateCaseExprToDXL
//
// @doc:
// Create a DXL node for a case statement from a GPDB OpExpr.
// This function can be used for constructing a scalar opexpr operator appearing in a
// base node (e.g. a scan node), or in an intermediate plan nodes.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateCaseExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, CaseExpr));
const CaseExpr *case_expr = (CaseExpr *) expr;
if (nullptr == case_expr->args)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiPlStmt2DXLConversion,
GPOS_WSZ_LIT("Do not support SIMPLE CASE STATEMENT"));
return nullptr;
}
if (nullptr == case_expr->arg)
{
return CreateScalarIfStmtFromCaseExpr(case_expr, var_colid_mapping);
}
return CreateScalarSwitchFromCaseExpr(case_expr, var_colid_mapping);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateScalarSwitchFromCaseExpr
//
// @doc:
// Create a DXL Switch node from a GPDB CaseExpr.
//
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateScalarSwitchFromCaseExpr(
const CaseExpr *case_expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(nullptr != case_expr->arg);
CDXLScalarSwitch *dxlop = GPOS_NEW(m_mp)
CDXLScalarSwitch(m_mp, GPOS_NEW(m_mp) CMDIdGPDB(case_expr->casetype));
CDXLNode *switch_node = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
// translate the switch expression
CDXLNode *dxlnode_arg =
TranslateScalarToDXL(case_expr->arg, var_colid_mapping);
switch_node->AddChild(dxlnode_arg);
// translate the cases
ListCell *lc = nullptr;
ForEach(lc, case_expr->args)
{
CaseWhen *expr = (CaseWhen *) lfirst(lc);
CDXLScalarSwitchCase *swtich_case =
GPOS_NEW(m_mp) CDXLScalarSwitchCase(m_mp);
CDXLNode *switch_case_node = GPOS_NEW(m_mp) CDXLNode(m_mp, swtich_case);
CDXLNode *cmp_expr_node =
TranslateScalarToDXL(expr->expr, var_colid_mapping);
GPOS_ASSERT(nullptr != cmp_expr_node);
CDXLNode *result_node =
TranslateScalarToDXL(expr->result, var_colid_mapping);
GPOS_ASSERT(nullptr != result_node);
switch_case_node->AddChild(cmp_expr_node);
switch_case_node->AddChild(result_node);
// add current case to switch node
switch_node->AddChild(switch_case_node);
}
// translate the "else" clause
if (nullptr != case_expr->defresult)
{
CDXLNode *default_result_node =
TranslateScalarToDXL(case_expr->defresult, var_colid_mapping);
GPOS_ASSERT(nullptr != default_result_node);
switch_node->AddChild(default_result_node);
}
return switch_node;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateCaseTestExprToDXL
//
// @doc:
// Create a DXL node for a case test from a GPDB Expr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateCaseTestExprToDXL(
const Expr *expr,
const CMappingVarColId * //var_colid_mapping
)
{
GPOS_ASSERT(IsA(expr, CaseTestExpr));
const CaseTestExpr *case_test_expr = (CaseTestExpr *) expr;
CDXLScalarCaseTest *dxlop = GPOS_NEW(m_mp) CDXLScalarCaseTest(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(case_test_expr->typeId));
return GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateScalarIfStmtFromCaseExpr
//
// @doc:
// Create a DXL If node from a GPDB CaseExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateScalarIfStmtFromCaseExpr(
const CaseExpr *case_expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(nullptr == case_expr->arg);
const ULONG when_clause_count = gpdb::ListLength(case_expr->args);
CDXLNode *root_if_tree_node = nullptr;
CDXLNode *cur_node = nullptr;
for (ULONG ul = 0; ul < when_clause_count; ul++)
{
CDXLScalarIfStmt *if_stmt_new_dxl = GPOS_NEW(m_mp) CDXLScalarIfStmt(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(case_expr->casetype));
CDXLNode *if_stmt_new_node =
GPOS_NEW(m_mp) CDXLNode(m_mp, if_stmt_new_dxl);
CaseWhen *expr = (CaseWhen *) gpdb::ListNth(case_expr->args, ul);
GPOS_ASSERT(IsA(expr, CaseWhen));
CDXLNode *cond_node =
TranslateScalarToDXL(expr->expr, var_colid_mapping);
CDXLNode *result_node =
TranslateScalarToDXL(expr->result, var_colid_mapping);
GPOS_ASSERT(nullptr != cond_node);
GPOS_ASSERT(nullptr != result_node);
if_stmt_new_node->AddChild(cond_node);
if_stmt_new_node->AddChild(result_node);
if (nullptr == root_if_tree_node)
{
root_if_tree_node = if_stmt_new_node;
}
else
{
cur_node->AddChild(if_stmt_new_node);
}
cur_node = if_stmt_new_node;
}
if (nullptr != case_expr->defresult)
{
CDXLNode *default_result_node =
TranslateScalarToDXL(case_expr->defresult, var_colid_mapping);
GPOS_ASSERT(nullptr != default_result_node);
cur_node->AddChild(default_result_node);
}
return root_if_tree_node;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateRelabelTypeToDXL
//
// @doc:
// Create a DXL node for a scalar RelabelType expression from a GPDB RelabelType
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateRelabelTypeToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, RelabelType));
const RelabelType *relabel_type = (RelabelType *) expr;
GPOS_ASSERT(nullptr != relabel_type->arg);
CDXLNode *child_node =
TranslateScalarToDXL(relabel_type->arg, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
// create the DXL node holding the scalar boolean operator
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(
m_mp, GPOS_NEW(m_mp) CDXLScalarCast(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(relabel_type->resulttype),
GPOS_NEW(m_mp) CMDIdGPDB(0) // casting function oid
));
dxlnode->AddChild(child_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateCoerceToDomainToDXL
//
// @doc:
// Create a DXL node for a scalar coerce expression from a
// GPDB coerce expression
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateCoerceToDomainToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, CoerceToDomain));
const CoerceToDomain *coerce = (CoerceToDomain *) expr;
GPOS_ASSERT(nullptr != coerce->arg);
CDXLNode *child_node = TranslateScalarToDXL(coerce->arg, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
// create the DXL node holding the scalar boolean operator
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(
m_mp, GPOS_NEW(m_mp) CDXLScalarCoerceToDomain(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(coerce->resulttype),
coerce->resulttypmod,
(EdxlCoercionForm) coerce->coercionformat, coerce->location));
dxlnode->AddChild(child_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateCoerceViaIOToDXL
//
// @doc:
// Create a DXL node for a scalar coerce expression from a
// GPDB coerce expression
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateCoerceViaIOToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, CoerceViaIO));
const CoerceViaIO *coerce = (CoerceViaIO *) expr;
GPOS_ASSERT(nullptr != coerce->arg);
CDXLNode *child_node = TranslateScalarToDXL(coerce->arg, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
// create the DXL node holding the scalar boolean operator
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(
m_mp, GPOS_NEW(m_mp) CDXLScalarCoerceViaIO(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(coerce->resulttype), -1,
(EdxlCoercionForm) coerce->coerceformat, coerce->location));
dxlnode->AddChild(child_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateArrayCoerceExprToDXL
// @doc:
// Create a DXL node for a scalar array coerce expression from a
// GPDB Array Coerce expression
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateArrayCoerceExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, ArrayCoerceExpr));
const ArrayCoerceExpr *array_coerce_expr = (ArrayCoerceExpr *) expr;
GPOS_ASSERT(nullptr != array_coerce_expr->arg);
CDXLNode *child_node =
TranslateScalarToDXL(array_coerce_expr->arg, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
Oid elemfuncid = 0;
if (IsA(array_coerce_expr->elemexpr, FuncExpr))
{
elemfuncid = ((FuncExpr *) array_coerce_expr->elemexpr)->funcid;
}
else if (IsA(array_coerce_expr->elemexpr, RelabelType))
{
;
}
else
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("ArrayCoerceExpr with elemexpr that is neither "
"FuncExpr or RelabelType"));
}
// GPDB_12_MERGE_FIXME: faking an explicit cast is wrong
// This _will_ lead to wrong behavior, e.g.
// INSERT INTO bar SELECT b FROM foo;
// where foo.b is of type varchar(100)[]
// and bar.b is of type varchar(9)[]
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(
m_mp, GPOS_NEW(m_mp) CDXLScalarArrayCoerceExpr(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(elemfuncid),
GPOS_NEW(m_mp) CMDIdGPDB(array_coerce_expr->resulttype),
array_coerce_expr->resulttypmod, true,
(EdxlCoercionForm) array_coerce_expr->coerceformat,
array_coerce_expr->location));
dxlnode->AddChild(child_node);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateFuncExprToDXL
//
// @doc:
// Create a DXL node for a scalar funcexpr from a GPDB FuncExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateFuncExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, FuncExpr));
const FuncExpr *func_expr = (FuncExpr *) expr;
int32 type_modifier = gpdb::ExprTypeMod((Node *) expr);
CMDIdGPDB *mdid_func = GPOS_NEW(m_mp) CMDIdGPDB(func_expr->funcid);
if (func_expr->funcvariadic)
{
// DXL doesn't have a field for variadic. We could plan it like a normal,
// non-VARIADIC call, and it would work for most functions that don't
// care whether they're called as VARIADIC or not. But some functions
// care. For example, text_format() checks, with get_fn_expr_variadic(),
// whether it was called as VARIADIC or with a normal ARRAY argument.
// GPDB_93_MERGE_FIXME: Fix ORCA to pass the 'funcvariadic' flag through
// the planning.
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("VARIADIC argument"));
}
// create the DXL node holding the scalar funcexpr
CDXLNode *dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarFuncExpr(
m_mp, mdid_func,
GPOS_NEW(m_mp) CMDIdGPDB(func_expr->funcresulttype),
type_modifier, func_expr->funcretset));
const IMDFunction *md_func = m_md_accessor->RetrieveFunc(mdid_func);
if (IMDFunction::EfsVolatile == md_func->GetFuncStability())
{
ListCell *lc = nullptr;
ForEach(lc, func_expr->args)
{
Node *arg_node = (Node *) lfirst(lc);
if (CTranslatorUtils::HasSubquery(arg_node))
{
GPOS_RAISE(
gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT(
"Volatile functions with subqueries in arguments"));
}
}
}
TranslateScalarChildren(dxlnode, func_expr->args, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateAggrefToDXL
//
// @doc:
// Create a DXL node for a scalar aggref from a GPDB FuncExpr
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateAggrefToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, Aggref));
const Aggref *aggref = (Aggref *) expr;
BOOL is_distinct = false;
if (aggref->aggdistinct)
{
is_distinct = true;
}
/*
* We shouldn't see any partial aggregates in the parse tree, they're produced
* by the planner.
*/
GPOS_ASSERT(aggref->aggsplit == AGGSPLIT_SIMPLE);
EdxlAggrefStage agg_stage = EdxlaggstageNormal;
CMDIdGPDB *agg_mdid = GPOS_NEW(m_mp) CMDIdGPDB(aggref->aggfnoid);
if (0 != aggref->agglevelsup)
{
// TODO: Feb 05 2015, remove temporary fix to avoid erroring out during execution
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLError,
GPOS_WSZ_LIT("Aggregate functions with outer references"));
}
// ORCA doesn't support the FILTER clause yet.
if (aggref->aggfilter)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Aggregate functions with FILTER"));
}
IMDId *mdid_return_type = CScalarAggFunc::PmdidLookupReturnType(
agg_mdid, (EdxlaggstageNormal == agg_stage), m_md_accessor);
IMDId *resolved_ret_type = nullptr;
if (m_md_accessor->RetrieveType(mdid_return_type)->IsAmbiguous())
{
// if return type given by MD cache is ambiguous, use type provided by aggref node
resolved_ret_type = GPOS_NEW(m_mp) CMDIdGPDB(aggref->aggtype);
}
// translate argtypes
ULongPtrArray *aggargtypes_values = GPOS_NEW(m_mp) ULongPtrArray(m_mp);
ListCell *lc;
ForEach(lc, aggref->aggargtypes)
{
ULONG *poid = GPOS_NEW(m_mp) ULONG(lfirst_oid(lc));
aggargtypes_values->Append(poid);
}
CDXLScalarAggref *aggref_scalar = GPOS_NEW(m_mp) CDXLScalarAggref(
m_mp, agg_mdid, resolved_ret_type, is_distinct, agg_stage,
CTranslatorUtils::GetAggKind(aggref->aggkind), aggargtypes_values);
// create the DXL node holding the scalar aggref
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, aggref_scalar);
// translate args
//
// 'indexes' stores the position of the TargetEntry which is referenced by
// a SortGroupClause.
std::vector<int> indexes(gpdb::ListLength(aggref->args) + 1, -1);
CDXLScalarValuesList *args_values =
GPOS_NEW(m_mp) CDXLScalarValuesList(m_mp);
CDXLNode *args_value_list_dxlnode =
GPOS_NEW(m_mp) CDXLNode(m_mp, args_values);
int i = 0;
ForEachWithCount(lc, aggref->args, i)
{
TargetEntry *tle = (TargetEntry *) lfirst(lc);
CDXLNode *child_node =
TranslateScalarToDXL(tle->expr, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
args_value_list_dxlnode->AddChild(child_node);
if (tle->ressortgroupref != 0)
{
// If tleSortGroupRef is non-zero then it means a SotGroupClause
// references this TargetEntry. We record that by mapping the
// ressortgroupref identifier to the corresponding index position
// of the TargetEntry.
indexes[tle->ressortgroupref] = i;
}
}
dxlnode->AddChild(args_value_list_dxlnode);
// translate direct args
CDXLScalarValuesList *dargs_values =
GPOS_NEW(m_mp) CDXLScalarValuesList(m_mp);
CDXLNode *dargs_value_list_dxlnode =
GPOS_NEW(m_mp) CDXLNode(m_mp, dargs_values);
ForEach(lc, aggref->aggdirectargs)
{
Expr *expr = (Expr *) lfirst(lc);
CDXLNode *child_node = TranslateScalarToDXL(expr, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
dargs_value_list_dxlnode->AddChild(child_node);
}
dxlnode->AddChild(dargs_value_list_dxlnode);
// translate sort group clause
CDXLScalarValuesList *sgc_values =
GPOS_NEW(m_mp) CDXLScalarValuesList(m_mp);
CDXLNode *sgc_value_list_dxlnode =
GPOS_NEW(m_mp) CDXLNode(m_mp, sgc_values);
ForEach(lc, aggref->aggorder)
{
Expr *expr = (Expr *) gpdb::CopyObject(lfirst(lc));
// Set SortGroupClause->tleSortGroupRef to corresponding index into
// targetlist. This avoids needing a separate structure to store this
// mapping.
((SortGroupClause *) expr)->tleSortGroupRef =
indexes[((SortGroupClause *) expr)->tleSortGroupRef];
CDXLNode *child_node = TranslateScalarToDXL(expr, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
sgc_value_list_dxlnode->AddChild(child_node);
}
dxlnode->AddChild(sgc_value_list_dxlnode);
// translate distinct
CDXLScalarValuesList *aggdistinct_values =
GPOS_NEW(m_mp) CDXLScalarValuesList(m_mp);
CDXLNode *aggdistinct_value_list_dxlnode =
GPOS_NEW(m_mp) CDXLNode(m_mp, aggdistinct_values);
ForEach(lc, aggref->aggdistinct)
{
Expr *expr = (Expr *) gpdb::CopyObject(lfirst(lc));
// Set SortGroupClause->tleSortGroupRef to corresponding index into
// targetlist. This avoids needing a separate structure to store this
// mapping.
((SortGroupClause *) expr)->tleSortGroupRef =
indexes[((SortGroupClause *) expr)->tleSortGroupRef];
CDXLNode *child_node = TranslateScalarToDXL(expr, var_colid_mapping);
GPOS_ASSERT(nullptr != child_node);
aggdistinct_value_list_dxlnode->AddChild(child_node);
}
dxlnode->AddChild(aggdistinct_value_list_dxlnode);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateWindowFrameToDXL
//
// @doc:
// Create a DXL window frame from a GPDB WindowFrame
//---------------------------------------------------------------------------
CDXLWindowFrame *
CTranslatorScalarToDXL::TranslateWindowFrameToDXL(
int frame_options, const Node *start_offset, const Node *end_offset,
const CMappingVarColId *var_colid_mapping, CDXLNode *new_scalar_proj_list)
{
EdxlFrameSpec frame_spec;
// GPDB_12_MERGE_FIXME: there's no reason ORCA would care about this, other
// than that it doesn't roundtrip this piece of info.
if ((frame_options & FRAMEOPTION_EXCLUSION))
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("window frame EXCLUDE"));
}
if ((frame_options & FRAMEOPTION_ROWS) != 0)
{
frame_spec = EdxlfsRow;
}
else if ((frame_options & FRAMEOPTION_RANGE) != 0)
{
frame_spec = EdxlfsRange;
// GPDB_12_MERGE_FIXME: as soon as we can pass WindowClause::startInRangeFunc
// and friends to ORCA and get them back, we can support stuff like
// RANGE 1 PRECEDING
if ((frame_options &
(FRAMEOPTION_START_OFFSET | FRAMEOPTION_END_OFFSET)))
{
GPOS_RAISE(
gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT(
"window frame RANGE with OFFSET PRECEDING or FOLLOWING"));
}
}
else if ((frame_options & FRAMEOPTION_GROUPS) != 0)
{
// GPDB_12_MERGE_FIXME: there's no reason the optimizer would care too
// much about this. As long as we recognize and roundtrip this, I think
// the executor will take care of it
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("window frame GROUPS mode"));
}
else
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("window frame option"));
}
// GPDB_12_MERGE_FIXME: the following window frame options are flipped (i.e.
// the START_ and END_ ones are swapped accidently in commit
// ebf9763c78826819). The only reason we got away with it is because we also
// flipped them in CTranslatorDXLToPlStmt::TranslateDXLWindow(). Flip them
// back after the merge.
EdxlFrameBoundary leading_boundary;
if ((frame_options & FRAMEOPTION_END_UNBOUNDED_PRECEDING) != 0)
{
leading_boundary = EdxlfbUnboundedPreceding;
}
else if ((frame_options & FRAMEOPTION_END_OFFSET_PRECEDING) != 0)
{
leading_boundary = EdxlfbBoundedPreceding;
}
else if ((frame_options & FRAMEOPTION_END_CURRENT_ROW) != 0)
{
leading_boundary = EdxlfbCurrentRow;
}
else if ((frame_options & FRAMEOPTION_END_OFFSET_FOLLOWING) != 0)
{
leading_boundary = EdxlfbBoundedFollowing;
}
else if ((frame_options & FRAMEOPTION_END_UNBOUNDED_FOLLOWING) != 0)
{
leading_boundary = EdxlfbUnboundedFollowing;
}
else
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Unrecognized window frame option"));
}
EdxlFrameBoundary trailing_boundary;
if ((frame_options & FRAMEOPTION_START_UNBOUNDED_PRECEDING) != 0)
{
trailing_boundary = EdxlfbUnboundedPreceding;
}
else if ((frame_options & FRAMEOPTION_START_OFFSET_PRECEDING) != 0)
{
trailing_boundary = EdxlfbBoundedPreceding;
}
else if ((frame_options & FRAMEOPTION_START_CURRENT_ROW) != 0)
{
trailing_boundary = EdxlfbCurrentRow;
}
else if ((frame_options & FRAMEOPTION_START_OFFSET_FOLLOWING) != 0)
{
trailing_boundary = EdxlfbBoundedFollowing;
}
else if ((frame_options & FRAMEOPTION_START_UNBOUNDED_FOLLOWING) != 0)
{
trailing_boundary = EdxlfbUnboundedFollowing;
}
else
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiPlStmt2DXLConversion,
GPOS_WSZ_LIT("Unrecognized window frame option"));
}
// We don't support non-default EXCLUDE [CURRENT ROW | GROUP | TIES |
// NO OTHERS] options.
EdxlFrameExclusionStrategy strategy = EdxlfesNulls;
CDXLNode *lead_edge = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarWindowFrameEdge(
m_mp, true /* fLeading */, leading_boundary));
CDXLNode *trail_edge = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarWindowFrameEdge(
m_mp, false /* fLeading */, trailing_boundary));
// translate the lead and trail value
if (nullptr != end_offset)
{
lead_edge->AddChild(TranslateWindowFrameEdgeToDXL(
end_offset, var_colid_mapping, new_scalar_proj_list));
}
if (nullptr != start_offset)
{
trail_edge->AddChild(TranslateWindowFrameEdgeToDXL(
start_offset, var_colid_mapping, new_scalar_proj_list));
}
CDXLWindowFrame *window_frame_dxl = GPOS_NEW(m_mp)
CDXLWindowFrame(frame_spec, strategy, lead_edge, trail_edge);
return window_frame_dxl;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateWindowFrameEdgeToDXL
//
// @doc:
// Translate the window frame edge, if the column used in the edge is a
// computed column then add it to the project list
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateWindowFrameEdgeToDXL(
const Node *node, const CMappingVarColId *var_colid_mapping,
CDXLNode *new_scalar_proj_list)
{
CDXLNode *val_node = TranslateScalarToDXL((Expr *) node, var_colid_mapping);
if (!m_context)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Window Frame in a stand-alone expression"));
}
if (!IsA(node, Var) && !IsA(node, Const))
{
GPOS_ASSERT(nullptr != new_scalar_proj_list);
CWStringConst unnamed_col(GPOS_WSZ_LIT("?column?"));
CMDName *alias_mdname = GPOS_NEW(m_mp) CMDName(m_mp, &unnamed_col);
ULONG project_element_id = m_context->m_colid_counter->next_id();
// construct a projection element
CDXLNode *project_element_node = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarProjElem(
m_mp, project_element_id, alias_mdname));
project_element_node->AddChild(val_node);
// add it to the computed columns project list
new_scalar_proj_list->AddChild(project_element_node);
// construct a new scalar ident
CDXLScalarIdent *scalar_ident = GPOS_NEW(m_mp) CDXLScalarIdent(
m_mp,
GPOS_NEW(m_mp) CDXLColRef(
GPOS_NEW(m_mp) CMDName(m_mp, &unnamed_col), project_element_id,
GPOS_NEW(m_mp)
CMDIdGPDB(gpdb::ExprType(const_cast<Node *>(node))),
gpdb::ExprTypeMod(const_cast<Node *>(node))));
val_node = GPOS_NEW(m_mp) CDXLNode(m_mp, scalar_ident);
}
return val_node;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateWindowFuncToDXL
//
// @doc:
// Create a DXL node for a scalar window ref from a GPDB WindowFunc
//
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateWindowFuncToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, WindowFunc));
const WindowFunc *window_func = (WindowFunc *) expr;
// ORCA doesn't support the FILTER clause yet.
if (window_func->aggfilter)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Aggregate functions with FILTER"));
}
// FIXME: DISTINCT-qualified window aggregates are currently broken in ORCA.
if (window_func->windistinct)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("DISTINCT-qualified Window Aggregate"));
}
if (!m_context)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Window function in a stand-alone expression"));
}
ULONG win_spec_pos = (ULONG) window_func->winref - 1;
/*
* ORCA's ScalarWindowRef object doesn't have fields for the 'winstar'
* and 'winagg', so we lose that information in the translation.
* Fortunately, the executor currently doesn't need those fields to
* be set correctly.
*/
CDXLScalarWindowRef *winref_dxlop = GPOS_NEW(m_mp) CDXLScalarWindowRef(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(window_func->winfnoid),
GPOS_NEW(m_mp) CMDIdGPDB(window_func->wintype),
window_func->windistinct, window_func->winstar, window_func->winagg,
EdxlwinstageImmediate, win_spec_pos);
// create the DXL node holding the scalar aggref
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, winref_dxlop);
TranslateScalarChildren(dxlnode, window_func->args, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateScalarCondFromQual
//
// @doc:
// Create a DXL scalar boolean operator node from a GPDB qual list.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateScalarCondFromQual(
List *quals, const CMappingVarColId *var_colid_mapping)
{
if (nullptr == quals || 0 == gpdb::ListLength(quals))
{
return nullptr;
}
if (1 == gpdb::ListLength(quals))
{
Expr *expr = (Expr *) gpdb::ListNth(quals, 0);
return TranslateScalarToDXL(expr, var_colid_mapping);
}
else
{
// GPDB assumes that if there are a list of qual conditions then it is an implicit AND operation
// Here we build the left deep AND tree
CDXLNode *dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarBoolExpr(m_mp, Edxland));
TranslateScalarChildren(dxlnode, quals, var_colid_mapping);
return dxlnode;
}
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateFilterFromQual
//
// @doc:
// Create a DXL scalar filter node from a GPDB qual list.
// The function allocates memory in the translator memory pool, and the caller
// is responsible for freeing it
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateFilterFromQual(
List *quals, const CMappingVarColId *var_colid_mapping,
Edxlopid filter_type)
{
CDXLScalarFilter *dxlop = nullptr;
switch (filter_type)
{
case EdxlopScalarFilter:
dxlop = GPOS_NEW(m_mp) CDXLScalarFilter(m_mp);
break;
case EdxlopScalarJoinFilter:
dxlop = GPOS_NEW(m_mp) CDXLScalarJoinFilter(m_mp);
break;
case EdxlopScalarOneTimeFilter:
dxlop = GPOS_NEW(m_mp) CDXLScalarOneTimeFilter(m_mp);
break;
default:
GPOS_ASSERT(!"Unrecognized filter type");
}
CDXLNode *filter_dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
CDXLNode *cond_node = CreateScalarCondFromQual(quals, var_colid_mapping);
if (nullptr != cond_node)
{
filter_dxlnode->AddChild(cond_node);
}
return filter_dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateSubLinkToDXL
//
// @doc:
// Create a DXL node from a GPDB sublink node.
//
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateSubLinkToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
const SubLink *sublink = (SubLink *) expr;
switch (sublink->subLinkType)
{
case EXPR_SUBLINK:
return CreateScalarSubqueryFromSublink(sublink, var_colid_mapping);
case ALL_SUBLINK:
case ANY_SUBLINK:
return CreateQuantifiedSubqueryFromSublink(sublink,
var_colid_mapping);
case EXISTS_SUBLINK:
return CreateExistSubqueryFromSublink(sublink, var_colid_mapping);
default:
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Non-Scalar Subquery"));
return nullptr;
}
}
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateQuantifiedSubqueryFromSublink
//
// @doc:
// Create ANY / ALL quantified sub query from a GPDB sublink node
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateQuantifiedSubqueryFromSublink(
const SubLink *sublink, const CMappingVarColId *var_colid_mapping)
{
CAutoP<CTranslatorQueryToDXL> query_to_dxl_translator;
query_to_dxl_translator = CreateSubqueryTranslator(
(Query *) sublink->subselect, var_colid_mapping);
CDXLNode *inner_dxlnode =
query_to_dxl_translator->TranslateSelectQueryToDXL();
CDXLNodeArray *query_output_dxlnode_array =
query_to_dxl_translator->GetQueryOutputCols();
CDXLNodeArray *cte_dxlnode_array = query_to_dxl_translator->GetCTEs();
CUtils::AddRefAppend(m_cte_producers, cte_dxlnode_array);
if (1 != query_output_dxlnode_array->Size())
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Non-Scalar Subquery"));
}
CDXLNode *dxl_sc_ident = (*query_output_dxlnode_array)[0];
GPOS_ASSERT(nullptr != dxl_sc_ident);
// get dxl scalar identifier
CDXLScalarIdent *scalar_ident =
dynamic_cast<CDXLScalarIdent *>(dxl_sc_ident->GetOperator());
// get the dxl column reference
const CDXLColRef *dxl_colref = scalar_ident->GetDXLColRef();
const ULONG colid = dxl_colref->Id();
// get the test expression
GPOS_ASSERT(IsA(sublink->testexpr, OpExpr));
OpExpr *op_expr = (OpExpr *) sublink->testexpr;
IMDId *mdid = GPOS_NEW(m_mp) CMDIdGPDB(op_expr->opno);
// get operator name
const CWStringConst *str = GetDXLArrayCmpType(mdid);
// translate left hand side of the expression
GPOS_ASSERT(nullptr != op_expr->args);
Expr *LHS_expr = (Expr *) gpdb::ListNth(op_expr->args, 0);
CDXLNode *outer_dxlnode = TranslateScalarToDXL(LHS_expr, var_colid_mapping);
CDXLNode *dxlnode = nullptr;
CDXLScalar *subquery = nullptr;
GPOS_ASSERT(ALL_SUBLINK == sublink->subLinkType ||
ANY_SUBLINK == sublink->subLinkType);
if (ALL_SUBLINK == sublink->subLinkType)
{
subquery = GPOS_NEW(m_mp) CDXLScalarSubqueryAll(
m_mp, mdid, GPOS_NEW(m_mp) CMDName(m_mp, str), colid);
}
else
{
subquery = GPOS_NEW(m_mp) CDXLScalarSubqueryAny(
m_mp, mdid, GPOS_NEW(m_mp) CMDName(m_mp, str), colid);
}
dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, subquery);
dxlnode->AddChild(outer_dxlnode);
dxlnode->AddChild(inner_dxlnode);
#ifdef GPOS_DEBUG
dxlnode->GetOperator()->AssertValid(dxlnode, false /* fValidateChildren */);
#endif
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateScalarSubqueryFromSublink
//
// @doc:
// Create a scalar subquery from a GPDB sublink node
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateScalarSubqueryFromSublink(
const SubLink *sublink, const CMappingVarColId *var_colid_mapping)
{
Query *subselect = (Query *) sublink->subselect;
CAutoP<CTranslatorQueryToDXL> query_to_dxl_translator;
query_to_dxl_translator =
CreateSubqueryTranslator(subselect, var_colid_mapping);
CDXLNode *subquery_dxlnode =
query_to_dxl_translator->TranslateSelectQueryToDXL();
CDXLNodeArray *query_output_dxlnode_array =
query_to_dxl_translator->GetQueryOutputCols();
GPOS_ASSERT(1 == query_output_dxlnode_array->Size());
CDXLNodeArray *cte_dxlnode_array = query_to_dxl_translator->GetCTEs();
CUtils::AddRefAppend(m_cte_producers, cte_dxlnode_array);
// get dxl scalar identifier
CDXLNode *dxl_sc_ident = (*query_output_dxlnode_array)[0];
GPOS_ASSERT(nullptr != dxl_sc_ident);
CDXLScalarIdent *scalar_ident =
CDXLScalarIdent::Cast(dxl_sc_ident->GetOperator());
// get the dxl column reference
const CDXLColRef *dxl_colref = scalar_ident->GetDXLColRef();
const ULONG colid = dxl_colref->Id();
CDXLNode *dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarSubquery(m_mp, colid));
dxlnode->AddChild(subquery_dxlnode);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateArrayExprToDXL
//
// @doc:
// Translate array
//
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateArrayExprToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, ArrayExpr));
const ArrayExpr *parrayexpr = (ArrayExpr *) expr;
CDXLScalarArray *dxlop = GPOS_NEW(m_mp) CDXLScalarArray(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(parrayexpr->element_typeid),
GPOS_NEW(m_mp) CMDIdGPDB(parrayexpr->array_typeid),
parrayexpr->multidims);
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
TranslateScalarChildren(dxlnode, parrayexpr->elements, var_colid_mapping);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateArrayRefToDXL
//
// @doc:
// Translate arrayref
//
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::TranslateArrayRefToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, SubscriptingRef));
const SubscriptingRef *parrayref = (SubscriptingRef *) expr;
Oid restype;
INT type_modifier = parrayref->reftypmod;
/* slice and/or store operations yield the array type */
if (parrayref->reflowerindexpr || parrayref->refassgnexpr)
{
restype = parrayref->refcontainertype;
}
else
{
restype = parrayref->refelemtype;
}
CDXLScalarArrayRef *dxlop = GPOS_NEW(m_mp) CDXLScalarArrayRef(
m_mp, GPOS_NEW(m_mp) CMDIdGPDB(parrayref->refelemtype), type_modifier,
GPOS_NEW(m_mp) CMDIdGPDB(parrayref->refcontainertype),
GPOS_NEW(m_mp) CMDIdGPDB(restype));
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, dxlop);
// GPDB_96_MERGE_FIXME: Since upstream commit 9246af6799, the List can contain NULLs,
// to indicate omitted array boundaries. Need to add support for them, but until then,
// bail out.
ListCell *lc;
ForEach(lc, parrayref->reflowerindexpr)
{
Expr *child_expr = (Expr *) lfirst(lc);
if (child_expr == nullptr)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Omitted array bound"));
}
}
ForEach(lc, parrayref->refupperindexpr)
{
Expr *child_expr = (Expr *) lfirst(lc);
if (child_expr == nullptr)
{
GPOS_RAISE(gpdxl::ExmaDXL, gpdxl::ExmiQuery2DXLUnsupportedFeature,
GPOS_WSZ_LIT("Omitted array bound"));
}
}
// add children
AddArrayIndexList(dxlnode, parrayref->reflowerindexpr,
CDXLScalarArrayRefIndexList::EilbLower,
var_colid_mapping);
AddArrayIndexList(dxlnode, parrayref->refupperindexpr,
CDXLScalarArrayRefIndexList::EilbUpper,
var_colid_mapping);
dxlnode->AddChild(
TranslateScalarToDXL(parrayref->refexpr, var_colid_mapping));
if (nullptr != parrayref->refassgnexpr)
{
dxlnode->AddChild(
TranslateScalarToDXL(parrayref->refassgnexpr, var_colid_mapping));
}
return dxlnode;
}
CDXLNode *
CTranslatorScalarToDXL::TranslateSortGroupClauseToDXL(
const Expr *expr, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(IsA(expr, SortGroupClause));
const SortGroupClause *sgc = (SortGroupClause *) expr;
CDXLScalarSortGroupClause *sort_group_clause = GPOS_NEW(m_mp)
CDXLScalarSortGroupClause(m_mp, sgc->tleSortGroupRef, sgc->eqop,
sgc->sortop, sgc->nulls_first, sgc->hashable);
// create the DXL node holding the scalar ident operator
CDXLNode *dxlnode = GPOS_NEW(m_mp) CDXLNode(m_mp, sort_group_clause);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::AddArrayIndexList
//
// @doc:
// Add an indexlist to the given DXL arrayref node
//
//---------------------------------------------------------------------------
void
CTranslatorScalarToDXL::AddArrayIndexList(
CDXLNode *dxlnode, List *list,
CDXLScalarArrayRefIndexList::EIndexListBound index_list_bound,
const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(nullptr != dxlnode);
GPOS_ASSERT(EdxlopScalarArrayRef ==
dxlnode->GetOperator()->GetDXLOperator());
GPOS_ASSERT(CDXLScalarArrayRefIndexList::EilbSentinel > index_list_bound);
CDXLNode *index_list_dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp)
CDXLScalarArrayRefIndexList(m_mp, index_list_bound));
TranslateScalarChildren(index_list_dxlnode, list, var_colid_mapping);
dxlnode->AddChild(index_list_dxlnode);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::GetDXLArrayCmpType
//
// @doc:
// Get the operator name
//
//---------------------------------------------------------------------------
const CWStringConst *
CTranslatorScalarToDXL::GetDXLArrayCmpType(IMDId *mdid) const
{
// get operator name
const IMDScalarOp *md_scalar_op = m_md_accessor->RetrieveScOp(mdid);
const CWStringConst *str = md_scalar_op->Mdname().GetMDName();
return str;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::CreateExistSubqueryFromSublink
//
// @doc:
// Create a DXL EXISTS subquery node from the respective GPDB
// sublink node
//---------------------------------------------------------------------------
CDXLNode *
CTranslatorScalarToDXL::CreateExistSubqueryFromSublink(
const SubLink *sublink, const CMappingVarColId *var_colid_mapping)
{
GPOS_ASSERT(nullptr != sublink);
CAutoP<CTranslatorQueryToDXL> query_to_dxl_translator;
query_to_dxl_translator = CreateSubqueryTranslator(
(Query *) sublink->subselect, var_colid_mapping);
CDXLNode *root_dxlnode =
query_to_dxl_translator->TranslateSelectQueryToDXL();
CDXLNodeArray *cte_dxlnode_array = query_to_dxl_translator->GetCTEs();
CUtils::AddRefAppend(m_cte_producers, cte_dxlnode_array);
CDXLNode *dxlnode = GPOS_NEW(m_mp)
CDXLNode(m_mp, GPOS_NEW(m_mp) CDXLScalarSubqueryExists(m_mp));
dxlnode->AddChild(root_dxlnode);
return dxlnode;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::GetDatum
//
// @doc:
// Create CDXLDatum from GPDB datum
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateDatumToDXL(CMemoryPool *mp,
const IMDType *md_type,
INT type_modifier, BOOL is_null,
ULONG len, Datum datum)
{
switch (md_type->GetDatumType())
{
default:
{
// generate a datum of generic type
return TranslateGenericDatumToDXL(mp, md_type, type_modifier,
is_null, len, datum);
}
case IMDType::EtiInt2:
{
return CTranslatorScalarToDXL::TranslateInt2DatumToDXL(
mp, md_type, is_null, len, datum);
}
case IMDType::EtiInt4:
{
return CTranslatorScalarToDXL::TranslateInt4DatumToDXL(
mp, md_type, is_null, len, datum);
}
case IMDType::EtiInt8:
{
return CTranslatorScalarToDXL::TranslateInt8DatumToDXL(
mp, md_type, is_null, len, datum);
}
case IMDType::EtiBool:
{
return CTranslatorScalarToDXL::TranslateBoolDatumToDXL(
mp, md_type, is_null, len, datum);
}
case IMDType::EtiOid:
{
return CTranslatorScalarToDXL::TranslateOidDatumToDXL(
mp, md_type, is_null, len, datum);
}
}
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateGenericDatumToDXL
//
// @doc:
// Translate a datum of generic type
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateGenericDatumToDXL(CMemoryPool *mp,
const IMDType *md_type,
INT type_modifier,
BOOL is_null, ULONG len,
Datum datum)
{
CMDIdGPDB *mdid_old = CMDIdGPDB::CastMdid(md_type->MDId());
CMDIdGPDB *mdid = GPOS_NEW(mp) CMDIdGPDB(*mdid_old);
BYTE *bytes = ExtractByteArrayFromDatum(mp, md_type, is_null, len, datum);
ULONG length = 0;
if (!is_null)
{
length =
(ULONG) gpdb::DatumSize(datum, md_type->IsPassedByValue(), len);
}
CDouble double_value(0);
if (CMDTypeGenericGPDB::HasByte2DoubleMapping(mdid))
{
double_value = ExtractDoubleValueFromDatum(mdid, is_null, bytes, datum);
}
LINT lint_value = 0;
if (CMDTypeGenericGPDB::HasByte2IntMapping(md_type))
{
lint_value = ExtractLintValueFromDatum(md_type, is_null, bytes, length);
}
return CMDTypeGenericGPDB::CreateDXLDatumVal(
mp, mdid, md_type, type_modifier, is_null, bytes, length, lint_value,
double_value);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateBoolDatumToDXL
//
// @doc:
// Translate a datum of type bool
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateBoolDatumToDXL(CMemoryPool *mp,
const IMDType *md_type,
BOOL is_null,
ULONG, //len,
Datum datum)
{
GPOS_ASSERT(md_type->IsPassedByValue());
CMDIdGPDB *mdid_old = CMDIdGPDB::CastMdid(md_type->MDId());
CMDIdGPDB *mdid = GPOS_NEW(mp) CMDIdGPDB(*mdid_old);
return GPOS_NEW(mp)
CDXLDatumBool(mp, mdid, is_null, gpdb::BoolFromDatum(datum));
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateOidDatumToDXL
//
// @doc:
// Translate a datum of type oid
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateOidDatumToDXL(CMemoryPool *mp,
const IMDType *md_type,
BOOL is_null,
ULONG, //len,
Datum datum)
{
GPOS_ASSERT(md_type->IsPassedByValue());
CMDIdGPDB *mdid_old = CMDIdGPDB::CastMdid(md_type->MDId());
CMDIdGPDB *mdid = GPOS_NEW(mp) CMDIdGPDB(*mdid_old);
return GPOS_NEW(mp)
CDXLDatumOid(mp, mdid, is_null, gpdb::OidFromDatum(datum));
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateInt2DatumToDXL
//
// @doc:
// Translate a datum of type int2
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateInt2DatumToDXL(CMemoryPool *mp,
const IMDType *md_type,
BOOL is_null,
ULONG, //len,
Datum datum)
{
GPOS_ASSERT(md_type->IsPassedByValue());
CMDIdGPDB *mdid_old = CMDIdGPDB::CastMdid(md_type->MDId());
CMDIdGPDB *mdid = GPOS_NEW(mp) CMDIdGPDB(*mdid_old);
return GPOS_NEW(mp)
CDXLDatumInt2(mp, mdid, is_null, gpdb::Int16FromDatum(datum));
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateInt4DatumToDXL
//
// @doc:
// Translate a datum of type int4
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateInt4DatumToDXL(CMemoryPool *mp,
const IMDType *md_type,
BOOL is_null,
ULONG, //len,
Datum datum)
{
GPOS_ASSERT(md_type->IsPassedByValue());
CMDIdGPDB *mdid_old = CMDIdGPDB::CastMdid(md_type->MDId());
CMDIdGPDB *mdid = GPOS_NEW(mp) CMDIdGPDB(*mdid_old);
return GPOS_NEW(mp)
CDXLDatumInt4(mp, mdid, is_null, gpdb::Int32FromDatum(datum));
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateInt8DatumToDXL
//
// @doc:
// Translate a datum of type int8
//---------------------------------------------------------------------------
CDXLDatum *
CTranslatorScalarToDXL::TranslateInt8DatumToDXL(CMemoryPool *mp,
const IMDType *md_type,
BOOL is_null,
ULONG, //len,
Datum datum)
{
GPOS_ASSERT(md_type->IsPassedByValue());
CMDIdGPDB *mdid_old = CMDIdGPDB::CastMdid(md_type->MDId());
CMDIdGPDB *mdid = GPOS_NEW(mp) CMDIdGPDB(*mdid_old);
return GPOS_NEW(mp)
CDXLDatumInt8(mp, mdid, is_null, gpdb::Int64FromDatum(datum));
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::ExtractDoubleValueFromDatum
//
// @doc:
// Extract the double value of the datum
//---------------------------------------------------------------------------
CDouble
CTranslatorScalarToDXL::ExtractDoubleValueFromDatum(IMDId *mdid, BOOL is_null,
BYTE *bytes, Datum datum)
{
GPOS_ASSERT(CMDTypeGenericGPDB::HasByte2DoubleMapping(mdid));
double d = 0;
if (is_null)
{
return CDouble(d);
}
if (mdid->Equals(&CMDIdGPDB::m_mdid_numeric))
{
Numeric num = (Numeric)(bytes);
if (gpdb::NumericIsNan(num))
{
// in GPDB NaN is considered the largest numeric number.
return CDouble(GPOS_FP_ABS_MAX);
}
d = gpdb::NumericToDoubleNoOverflow(num);
}
else if (mdid->Equals(&CMDIdGPDB::m_mdid_float4))
{
float4 f = gpdb::Float4FromDatum(datum);
if (isnan(f))
{
d = GPOS_FP_ABS_MAX;
}
else
{
d = (double) f;
}
}
else if (mdid->Equals(&CMDIdGPDB::m_mdid_float8))
{
d = gpdb::Float8FromDatum(datum);
if (isnan(d))
{
d = GPOS_FP_ABS_MAX;
}
}
else if (CMDTypeGenericGPDB::IsTimeRelatedType(mdid))
{
d = gpdb::ConvertTimeValueToScalar(datum,
CMDIdGPDB::CastMdid(mdid)->Oid());
}
else if (CMDTypeGenericGPDB::IsNetworkRelatedType(mdid))
{
d = gpdb::ConvertNetworkToScalar(datum,
CMDIdGPDB::CastMdid(mdid)->Oid());
}
return CDouble(d);
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::ExtractByteArrayFromDatum
//
// @doc:
// Extract the byte array value of the datum. The result is NULL if datum is NULL
//---------------------------------------------------------------------------
BYTE *
CTranslatorScalarToDXL::ExtractByteArrayFromDatum(CMemoryPool *mp,
const IMDType *md_type,
BOOL is_null, ULONG len,
Datum datum)
{
ULONG length = 0;
BYTE *bytes = nullptr;
if (is_null)
{
return bytes;
}
length = (ULONG) gpdb::DatumSize(datum, md_type->IsPassedByValue(), len);
GPOS_ASSERT(length > 0);
bytes = GPOS_NEW_ARRAY(mp, BYTE, length);
if (md_type->IsPassedByValue())
{
GPOS_ASSERT(length <= ULONG(sizeof(Datum)));
clib::Memcpy(bytes, &datum, length);
}
else
{
clib::Memcpy(bytes, gpdb::PointerFromDatum(datum), length);
}
return bytes;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::ExtractLintValueFromDatum
//
// @doc:
// Extract the long int value of a datum
//---------------------------------------------------------------------------
LINT
CTranslatorScalarToDXL::ExtractLintValueFromDatum(const IMDType *md_type,
BOOL is_null, BYTE *bytes,
ULONG length)
{
IMDId *mdid = md_type->MDId();
GPOS_ASSERT(CMDTypeGenericGPDB::HasByte2IntMapping(md_type));
LINT lint_value = 0;
if (is_null)
{
return lint_value;
}
if (mdid->Equals(&CMDIdGPDB::m_mdid_cash) ||
mdid->Equals(&CMDIdGPDB::m_mdid_date))
{
// cash is a pass-by-ref type
Datum datumConstVal = (Datum) 0;
clib::Memcpy(&datumConstVal, bytes, length);
// Date is internally represented as an int32
lint_value = (LINT)(gpdb::Int32FromDatum(datumConstVal));
}
else
{
// use hash value
ULONG hash = 0;
if (is_null)
{
hash = gpos::HashValue<ULONG>(&hash);
}
else
{
if (mdid->Equals(&CMDIdGPDB::m_mdid_uuid))
{
hash = gpdb::UUIDHash((Datum) bytes);
}
else if (mdid->Equals(&CMDIdGPDB::m_mdid_bpchar))
{
hash = gpdb::HashBpChar((Datum) bytes);
}
else if (mdid->Equals(&CMDIdGPDB::m_mdid_char))
{
hash = gpdb::HashChar((Datum) bytes);
}
else if (mdid->Equals(&CMDIdGPDB::m_mdid_name))
{
hash = gpdb::HashName((Datum) bytes);
}
else
{
hash = gpdb::HashText((Datum) bytes);
}
}
lint_value = (LINT) hash;
}
return lint_value;
}
//---------------------------------------------------------------------------
// @function:
// CTranslatorScalarToDXL::TranslateDatumToDXL
//
// @doc:
// Create IDatum from GPDB datum
//---------------------------------------------------------------------------
IDatum *
CTranslatorScalarToDXL::CreateIDatumFromGpdbDatum(CMemoryPool *mp,
const IMDType *md_type,
BOOL is_null,
Datum gpdb_datum)
{
ULONG length = md_type->Length();
if (!md_type->IsPassedByValue() && !is_null)
{
INT len =
dynamic_cast<const CMDTypeGenericGPDB *>(md_type)->GetGPDBLength();
length = (ULONG) gpdb::DatumSize(gpdb_datum, md_type->IsPassedByValue(),
len);
}
GPOS_ASSERT(is_null || length > 0);
CDXLDatum *datum_dxl = CTranslatorScalarToDXL::TranslateDatumToDXL(
mp, md_type, gpmd::default_type_modifier, is_null, length, gpdb_datum);
IDatum *datum = md_type->GetDatumForDXLDatum(mp, datum_dxl);
datum_dxl->Release();
return datum;
}
// EOF
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