init push

src/sql/engine/basic/ob_values.cpp

@@ -0,0 +1,142 @@
+/**
+ * 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/basic/ob_values.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+OB_SERIALIZE_MEMBER((ObValues, ObNoChildrenPhyOperator), row_store_);
+
+class ObValues::ObValuesCtx : public ObPhyOperatorCtx {
+  public:
+  explicit ObValuesCtx(ObExecContext& ctx) : ObPhyOperatorCtx(ctx), row_store_it_()
+  {}
+  virtual void destroy()
+  {
+    ObPhyOperatorCtx::destroy_base();
+  }
+
+  private:
+  ObRowStore::Iterator row_store_it_;
+  friend class ObValues;
+};
+
+void ObValues::reset()
+{
+  row_store_.reset();
+  ObNoChildrenPhyOperator::reset();
+}
+
+void ObValues::reuse()
+{
+  row_store_.reuse();
+  ObNoChildrenPhyOperator::reuse();
+}
+// not used so far, may be use later
+int ObValues::add_row(const ObNewRow& row)
+{
+  return row_store_.add_row(row);
+}
+
+int ObValues::inner_open(ObExecContext& ctx) const
+{
+  int ret = OB_SUCCESS;
+  ObValuesCtx* values_ctx = NULL;
+
+  if (OB_FAIL(init_op_ctx(ctx))) {
+    LOG_WARN("fail to init operator context", K(ret));
+  } else if (OB_ISNULL(values_ctx = GET_PHY_OPERATOR_CTX(ObValuesCtx, ctx, get_id()))) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("fail to get physical operator context");
+  } else {
+    values_ctx->row_store_it_ = row_store_.begin();
+  }
+  return ret;
+}
+
+// not used so far, may be use later
+int ObValues::rescan(ObExecContext& ctx) const
+{
+  int ret = OB_SUCCESS;
+  ObValuesCtx* values_ctx = NULL;
+  if (OB_FAIL(ObNoChildrenPhyOperator::rescan(ctx))) {
+    LOG_WARN("rescan ObNoChildrenPhyOperator failed", K(ret));
+  } else if (OB_ISNULL(values_ctx = GET_PHY_OPERATOR_CTX(ObValuesCtx, ctx, get_id()))) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("values_ctx is null");
+  } else {
+    values_ctx->row_store_it_ = row_store_.begin();
+  }
+  return ret;
+}
+
+int ObValues::inner_close(ObExecContext& ctx) const
+{
+  UNUSED(ctx);
+  return OB_SUCCESS;
+}
+
+int ObValues::init_op_ctx(ObExecContext& ctx) const
+{
+  int ret = OB_SUCCESS;
+  ObPhyOperatorCtx* op_ctx = NULL;
+  if (OB_FAIL(CREATE_PHY_OPERATOR_CTX(ObValuesCtx, ctx, get_id(), get_type(), op_ctx))) {
+    LOG_WARN("create physical operator context failed", K(ret));
+  } else if (OB_ISNULL(op_ctx)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("op_ctx is null");
+  } else if (OB_FAIL(op_ctx->create_cur_row(get_column_count(), projector_, projector_size_))) {
+    LOG_WARN("create current row failed", K(ret), "#columns", get_column_count());
+  }
+  return ret;
+}
+
+int ObValues::inner_get_next_row(ObExecContext& ctx, const ObNewRow*& row) const
+{
+  int ret = OB_SUCCESS;
+  ObValuesCtx* values_ctx = NULL;
+
+  if (OB_ISNULL(values_ctx = GET_PHY_OPERATOR_CTX(ObValuesCtx, ctx, get_id()))) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("fail to get physical operator context");
+  } else if (OB_FAIL(THIS_WORKER.check_status())) {
+    LOG_WARN("check physical plan status failed", K(ret));
+  } else if (OB_FAIL(values_ctx->row_store_it_.get_next_row(values_ctx->get_cur_row()))) {
+    if (OB_ITER_END != ret) {
+      LOG_WARN("fail to get next row", K(ret));
+    }
+  } else {
+    row = &values_ctx->get_cur_row();
+  }
+  return ret;
+}
+
+int64_t ObValues::to_string_kv(char* buf, const int64_t buf_len) const
+{
+  int64_t pos = 0;
+  J_KV(N_ROW_STORE, row_store_);
+  return pos;
+}
+
+int ObValues::set_row_store(const common::ObRowStore& row_store)
+{
+  int ret = OB_SUCCESS;
+  if (OB_FAIL(row_store_.assign(row_store))) {
+    LOG_WARN("fail to assign row store", K(ret));
+  }
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase