init push

2021-05-31 22:56:52 +08:00
commit cea7de1475
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--- a/src/sql/engine/expr/ob_expr_seq_nextval.cpp
+++ b/src/sql/engine/expr/ob_expr_seq_nextval.cpp
@ -0,0 +1,114 @@
+/**
+ * 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_seq_nextval.h"
+#include "lib/mysqlclient/ob_mysql_result.h"
+#include "sql/engine/ob_physical_plan_ctx.h"
+#include "sql/session/ob_sql_session_info.h"
+#include "sql/engine/ob_exec_context.h"
+#include "sql/engine/expr/ob_expr_util.h"
+
+namespace oceanbase {
+using namespace common;
+using namespace share;
+namespace sql {
+ObExprSeqNextval::ObExprSeqNextval(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_SEQ_NEXTVAL, N_SEQ_NEXTVAL, 1, NOT_ROW_DIMENSION)
+{}
+
+ObExprSeqNextval::~ObExprSeqNextval()
+{}
+
+int ObExprSeqNextval::calc_result_type1(ObExprResType& type, ObExprResType& type1, ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+  int ret = OB_SUCCESS;
+  if (!type1.is_uint64()) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("input param should be uint64_t type", K(type1), K(ret));
+  } else {
+    type.set_number();
+    type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObNumberType].scale_);
+    type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObNumberType].precision_);
+    type.set_result_flag(OB_MYSQL_NOT_NULL_FLAG);
+  }
+  return ret;
+}
+
+int ObExprSeqNextval::calc_result1(ObObj& result, const ObObj& obj, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (OB_ISNULL(expr_ctx.my_session_)) {
+    ret = OB_INVALID_ARGUMENT;
+    LOG_WARN("Invalid argument", K(expr_ctx.my_session_), K(ret));
+  } else {
+    ObSQLSessionInfo& session = *expr_ctx.my_session_;
+    common::ObIAllocator& allocator = *expr_ctx.calc_buf_;
+    uint64_t tenant_id = session.get_effective_tenant_id();
+    int64_t seq_id = obj.get_int();
+    ObSequenceValue value;
+    common::number::ObNumber tmp;
+    if (OB_FAIL(session.get_sequence_value(tenant_id, seq_id, value))) {
+      LOG_WARN("failed to get sequence value from session", K(tenant_id), K(seq_id), K(ret));
+    } else if (OB_FAIL(tmp.from(value.val(), allocator))) {
+      LOG_WARN("fail deep copy value", K(ret));
+    } else {
+      result.set_number(tmp);
+    }
+  }
+  return ret;
+}
+
+int ObExprSeqNextval::cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
+{
+  int ret = OB_SUCCESS;
+  UNUSED(expr_cg_ctx);
+  UNUSED(raw_expr);
+  if (OB_UNLIKELY(1 != rt_expr.arg_cnt_)) {
+    ret = OB_INVALID_ARGUMENT_NUM;
+    LOG_WARN("invalid arg num", K(ret), K(rt_expr.arg_cnt_));
+  } else {
+    rt_expr.eval_func_ = calc_sequence_nextval;
+  }
+  return ret;
+}
+
+int ObExprSeqNextval::calc_sequence_nextval(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res)
+{
+  int ret = OB_SUCCESS;
+  uint64_t operator_id = expr.extra_;
+  ObDatum* arg_datum = nullptr;
+  if (OB_FAIL(expr.args_[0]->eval(ctx, arg_datum))) {
+    LOG_WARN("failed to eval expr", K(ret));
+  } else {
+    ObSQLSessionInfo* session = ctx.exec_ctx_.get_my_session();
+    common::number::ObNumber num;
+    ObNumStackOnceAlloc tmp_alloc;
+    uint64_t tenant_id = session->get_effective_tenant_id();
+    int64_t seq_id = arg_datum->get_int();
+    ObSequenceValue value;
+    if (OB_FAIL(session->get_sequence_value(tenant_id, seq_id, value))) {
+      LOG_WARN("failed to get sequence value from session", K(tenant_id), K(seq_id), K(ret));
+    } else if (OB_FAIL(num.from(value.val(), tmp_alloc))) {
+      LOG_WARN("fail deep copy value", K(ret));
+    } else {
+      res.set_number(num);
+    }
+    LOG_DEBUG("trace sequence nextval", K(num), K(ret));
+  }
+  return ret;
+}
+
+}  // end namespace sql
+}  // end namespace oceanbase