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oceanbase/src/sql/engine/expr/ob_expr_set.cpp

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/**
* Copyright (c) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX SQL_ENG
#include "sql/engine/expr/ob_expr_set.h"
#include "objit/common/ob_item_type.h"
#include "share/object/ob_obj_cast.h"
#include "sql/session/ob_sql_session_info.h"
#include "sql/engine/ob_exec_context.h"
#include "share/schema/ob_schema_struct.h"
#include "pl/ob_pl_allocator.h"
#include "sql/engine/expr/ob_expr_multiset.h"
using namespace oceanbase::common;
using namespace oceanbase::sql;
namespace oceanbase
{
namespace sql
{
}
}
ObExprSet::ObExprSet(ObIAllocator &alloc)
:ObFuncExprOperator(alloc, T_FUN_SYS_SET, N_SET, 1, NOT_VALID_FOR_GENERATED_COL, NOT_ROW_DIMENSION)
{
}
ObExprSet::~ObExprSet()
{
}
int ObExprSet::assign(const ObExprOperator &other)
{
int ret = OB_SUCCESS;
if (other.get_type() != T_OP_SET) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr operator is mismatch", K(other.get_type()));
} else if (OB_FAIL(ObExprOperator::assign(other))) {
LOG_WARN("assign parent expr failed", K(ret));
} else {
}
return ret;
}
int ObExprSet::calc_result_type1(ObExprResType &type,
ObExprResType &type1,
ObExprTypeCtx &type_ctx) const
{
UNUSED(type_ctx);
int ret = OB_SUCCESS;
if (lib::is_oracle_mode()) {
if (type1.is_ext()) {
type.set_ext();
type.set_precision(DEFAULT_PRECISION_FOR_BOOL);
type.set_scale(DEFAULT_SCALE_FOR_INTEGER);
type.set_calc_type(type1.get_calc_type());
type.set_result_flag(NOT_NULL_FLAG);
type.set_udt_id(type1.get_udt_id());
} else {
ret = OB_ERR_WRONG_TYPE_FOR_VAR;
LOG_WARN("PLS-00306: wrong number or types of arguments in call stmt",
K(ret), K(type1));
}
} else {
ret = OB_ERR_WRONG_TYPE_FOR_VAR;
LOG_WARN("PLS-00306: wrong number or types of arguments in call stmt",
K(ret), K(type1));
}
return ret;
}
#ifdef OB_BUILD_ORACLE_PL
int ObExprSet::eval_coll(const ObObj &obj, ObExecContext &ctx, pl::ObPLNestedTable *&coll)
{
int ret = OB_SUCCESS;
pl::ObPLCollection *c1 = reinterpret_cast<pl::ObPLCollection *>(obj.get_ext());
ObIAllocator &allocator = ctx.get_allocator();
ObIAllocator *collection_allocator = NULL;
ObObj *data_arr = NULL;
int64_t elem_count = 0;
if (OB_ISNULL(c1)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("union udt failed due to null udt", K(ret), K(obj));
} else if (pl::PL_NESTED_TABLE_TYPE != c1->get_type()) {
ret = OB_ERR_WRONG_TYPE_FOR_VAR;
LOG_WARN("PLS-00306: wrong number or types of arguments in call stmt",
K(ret), K(c1->get_type()));
} else if (0 > c1->get_count() || !(c1->is_inited())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("union udt failed due to null udt", K(ret), K(c1->get_count()), K(c1->is_inited()));
} else if (c1->is_of_composite()) {
ret = OB_NOT_SUPPORTED;
LOG_USER_ERROR(OB_NOT_SUPPORTED, "SET for collections of composite types is");
LOG_WARN("SET for collections of composite types is not supported", K(c1->get_element_type()));
} else {
coll = static_cast<pl::ObPLNestedTable*>(allocator.alloc(sizeof(pl::ObPLNestedTable)));
if (OB_ISNULL(coll)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("alloc memory failed.", K(ret));
} else {
coll = new(coll)pl::ObPLNestedTable(c1->get_id());
collection_allocator =
static_cast<ObIAllocator*>(allocator.alloc(sizeof(pl::ObPLCollAllocator)));
collection_allocator = new(collection_allocator)pl::ObPLCollAllocator(coll);
if (OB_ISNULL(collection_allocator)) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("alloc pl collection allocator failed.", K(ret));
} else {
if (OB_FAIL(ObExprMultiSet::calc_ms_one_distinct(collection_allocator,
reinterpret_cast<ObObj *>(c1->get_data()),
c1->get_count(),
data_arr,
elem_count))) {
LOG_WARN("failed to distinct nest table", K(ret));
}
}
}
}
if (OB_FAIL(ret)) {
LOG_WARN("failed to calc set operator", K(ret), K(data_arr));
}
else if (0 != elem_count && OB_ISNULL(data_arr)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected result.", K(elem_count), K(data_arr), K(ret));
} else {
coll->set_allocator(collection_allocator);
coll->set_type(c1->get_type());
coll->set_id(c1->get_id());
coll->set_is_null(c1->is_null());
coll->set_element_type(c1->get_element_type());
coll->set_column_count(c1->get_column_count());
coll->set_not_null(c1->is_not_null());
coll->set_count(elem_count);
coll->set_first(elem_count > 0 ? 1 : OB_INVALID_ID);
coll->set_last(elem_count > 0 ? elem_count : OB_INVALID_ID);
coll->set_data(data_arr);
}
return ret;
}
#endif
int ObExprSet::cg_expr(
ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
{
int ret = OB_SUCCESS;
UNUSED(op_cg_ctx);
UNUSED(raw_expr);
CK (1 == rt_expr.arg_cnt_);
OX (rt_expr.eval_func_ = calc_set);
return ret;
}
int ObExprSet::calc_set(const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
{
int ret = OB_SUCCESS;
#ifndef OB_BUILD_ORACLE_PL
UNUSEDx(expr, ctx, expr_datum);
#else
if (lib::is_oracle_mode() && ObExtendType == expr.args_[0]->datum_meta_.type_) {
ObDatum *datum = NULL;
pl::ObPLNestedTable *coll = NULL;
ObObj *obj = NULL;
ObObjMeta obj_meta;
obj_meta.set_ext();
CK (OB_NOT_NULL(obj = static_cast<ObObj *>(
ctx.exec_ctx_.get_allocator().alloc(sizeof(ObObj)))));
OZ (expr.args_[0]->eval(ctx, datum));
OX (datum->to_obj(*obj, obj_meta));
OZ (eval_coll(*obj, ctx.exec_ctx_, coll));
CK (OB_NOT_NULL(coll));
OX (obj->set_extend(reinterpret_cast<int64_t>(coll), coll->get_type()));
OZ (expr_datum.from_obj(*obj));
//Collection constructed here must be recorded and destructed at last
if (OB_NOT_NULL(coll) &&
OB_NOT_NULL(coll->get_allocator())) {
common::ObIAllocator *collection_allocator = dynamic_cast<pl::ObPLCollAllocator*>(coll->get_allocator());
if (OB_NOT_NULL(collection_allocator)) {
int tmp_ret = OB_SUCCESS;
auto &exec_ctx = ctx.exec_ctx_;
if (OB_ISNULL(exec_ctx.get_pl_ctx())) {
tmp_ret = exec_ctx.init_pl_ctx();
}
if (OB_SUCCESS == tmp_ret && OB_NOT_NULL(exec_ctx.get_pl_ctx())) {
tmp_ret = exec_ctx.get_pl_ctx()->add(*obj);
}
if (OB_SUCCESS != tmp_ret) {
LOG_ERROR("fail to collect pl collection allocator, may be exist memory issue", K(tmp_ret));
}
ret = OB_SUCCESS == ret ? tmp_ret : ret;
}
}
}
#endif
return ret;
}
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