135 lines
4.6 KiB
C++
135 lines
4.6 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#define USING_LOG_PREFIX SQL_ENG
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#include "sql/engine/expr/ob_expr_pl_seq_nextval.h"
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#include "sql/engine/ob_exec_context.h"
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#include "lib/mysqlclient/ob_mysql_result.h"
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#include "sql/engine/ob_physical_plan_ctx.h"
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#include "sql/engine/expr/ob_expr_util.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "share/sequence/ob_sequence_cache.h"
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#include "share/schema/ob_schema_getter_guard.h"
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namespace oceanbase
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{
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using namespace common;
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using namespace share;
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namespace sql
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{
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ObExprPLSeqNextval::ObExprPLSeqNextval(ObIAllocator &alloc)
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: ObFuncExprOperator(alloc, T_FUN_SYS_PL_SEQ_NEXT_VALUE, N_PL_SEQ_NEXTVAL, 1, NOT_ROW_DIMENSION,
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false, INTERNAL_IN_ORACLE_MODE)
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{
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}
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ObExprPLSeqNextval::~ObExprPLSeqNextval()
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{
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}
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int ObExprPLSeqNextval::calc_result_type1(ObExprResType &type,
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ObExprResType &type1,
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ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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int ret = OB_SUCCESS;
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if (!type1.is_uint64()) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("input param should be uint64_t type", K(type1), K(ret));
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} else {
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type.set_number();
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type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObNumberType].scale_);
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type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObNumberType].precision_);
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type.set_result_flag(NOT_NULL_FLAG);
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}
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return ret;
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}
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int ObExprPLSeqNextval::get_schema_guard(ObExecContext *exec_ctx,
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share::schema::ObSchemaGetterGuard *&schema_guard) const
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{
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int ret = OB_SUCCESS;
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schema_guard = NULL;
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if (OB_ISNULL(exec_ctx)) {
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ret = OB_INVALID_ARGUMENT;
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LOG_WARN("task executor context is NULL", K(ret), KP(exec_ctx));
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} else if (OB_ISNULL(schema_guard = exec_ctx->get_sql_ctx()->schema_guard_)) {
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ret = OB_ERR_UNEXPECTED;
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LOG_WARN("schema guard is NULL", K(ret));
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}
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return ret;
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}
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int ObExprPLSeqNextval::cg_expr(
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ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr, ObExpr &rt_expr) const
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{
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int ret = OB_SUCCESS;
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UNUSED(op_cg_ctx);
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UNUSED(raw_expr);
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CK (1 == rt_expr.arg_cnt_);
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OX (rt_expr.eval_func_ = eval_pl_seq_next_val);
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return ret;
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}
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int ObExprPLSeqNextval::eval_pl_seq_next_val(
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const ObExpr &expr, ObEvalCtx &ctx, ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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share::ObSequenceCache &seq_cache = share::ObSequenceCache::get_instance();
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ObSQLSessionInfo *session = ctx.exec_ctx_.get_my_session();
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share::schema::ObSchemaGetterGuard *schema_guard = NULL;
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ObDatum *datum = NULL;
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CK (OB_NOT_NULL(session));
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CK (1 == expr.arg_cnt_);
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OZ (expr.args_[0]->eval(ctx, datum));
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CK (OB_NOT_NULL(datum));
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CK (OB_NOT_NULL(schema_guard = ctx.exec_ctx_.get_sql_ctx()->schema_guard_));
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if (OB_FAIL(ret)) {
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} else {
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uint64_t tenant_id = session->get_effective_tenant_id();
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int64_t seq_id = datum->get_int();
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ObEvalCtx::TempAllocGuard alloc_guard(ctx);
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const share::schema::ObSequenceSchema *seq_schema = nullptr;
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if (OB_FAIL(schema_guard->get_sequence_schema(tenant_id,
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seq_id,
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seq_schema))) {
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LOG_WARN("fail get sequence schema", K(seq_id), K(ret));
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} else {
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ObSequenceValue seq_value;
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if (OB_FAIL(seq_cache.nextval(*seq_schema,
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alloc_guard.get_allocator(),
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seq_value))) {
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LOG_WARN("fail get nextval for seq", K(tenant_id), K(seq_id), K(ret));
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} else if (OB_FAIL(session->set_sequence_value(tenant_id, seq_id, seq_value))) {
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LOG_WARN("save seq_value to session as currval for later read fail",
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K(tenant_id), K(seq_id), K(seq_value), K(ret));
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} else { /*do nothing*/ }
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if (OB_SUCC(ret)) {
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common::number::ObNumber tmp;
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ObNumStackOnceAlloc tmp_alloc;
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if (OB_FAIL(tmp.from(seq_value.val(), tmp_alloc))){
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LOG_WARN("fail deep copy value", K(ret), K(seq_id));
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} else {
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expr_datum.set_number(tmp);
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}
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}
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}
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}
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return ret;
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}
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}//end namespace sql
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}//end namespace oceanbase
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