[FEAT MERGE]:Oracle Json Supported

src/sql/optimizer/ob_log_json_table.cpp

@@ -0,0 +1,141 @@
+/**
+ * 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.
+ * This file contains implementation support for the log json table abstraction.
+ * Authors:
+ *   weiyouchao.wyc <weiyouchao.wyc@oceanbase.com>
+ */
+
+#define USING_LOG_PREFIX SQL_OPT
+
+#include "sql/optimizer/ob_log_json_table.h"
+#include "sql/optimizer/ob_optimizer_util.h"
+#include "sql/optimizer/ob_opt_est_cost.h"
+#include "sql/optimizer/ob_log_plan.h"
+
+using namespace oceanbase::common;
+
+namespace oceanbase
+{
+namespace sql
+{
+
+
+int ObLogJsonTable::generate_access_exprs()
+{
+  int ret = OB_SUCCESS;
+  const ObDMLStmt *stmt = get_stmt();
+  if (OB_ISNULL(stmt)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("get unexpected null", K(ret));
+  } else {
+    for (int64_t i = 0; OB_SUCC(ret) && i < stmt->get_column_size(); ++i) {
+      const ColumnItem *col_item = stmt->get_column_item(i);
+      if (OB_ISNULL(col_item) || OB_ISNULL(col_item->expr_)) {
+        ret = OB_ERR_UNEXPECTED;
+        LOG_WARN("get unexpected null", K(ret));
+      } else if (col_item->table_id_ == table_id_ &&
+                 col_item->expr_->is_explicited_reference() &&
+                 OB_FAIL(access_exprs_.push_back(col_item->expr_))) {
+        LOG_WARN("failed to push back column expr", K(ret));
+      } else { /*do nothing*/ }
+    }
+  }
+  return ret;
+}
+
+int ObLogJsonTable::allocate_expr_post(ObAllocExprContext &ctx)
+{
+  int ret = OB_SUCCESS;
+  for (int64_t i = 0; OB_SUCC(ret) && i < access_exprs_.count(); ++i) {
+    ObRawExpr *value_col = access_exprs_.at(i);
+    if (OB_FAIL(mark_expr_produced(value_col, branch_id_, id_, ctx))) {
+      LOG_WARN("makr expr produced failed", K(ret));
+    } else if (!is_plan_root() && OB_FAIL(add_var_to_array_no_dup(output_exprs_, value_col))) {
+      LOG_WARN("add expr no duplicate key failed", K(ret));
+    } else { /*do nothing*/ }
+  }
+
+  if (OB_SUCC(ret)) {
+    if (OB_FAIL(ObLogicalOperator::allocate_expr_post(ctx))) {
+      LOG_WARN("failed to allocate expr post", K(ret));
+    }
+  }
+  return ret;
+}
+
+int ObLogJsonTable::get_op_exprs(ObIArray<ObRawExpr*> &all_exprs)
+{
+  int ret = OB_SUCCESS;
+  const ObDMLStmt *stmt = get_stmt();
+
+  if (OB_FAIL(generate_access_exprs())) {
+    LOG_WARN("failed to generate access exprs", K(ret));
+  } else if (OB_FAIL(append(all_exprs, access_exprs_))) {
+    LOG_WARN("failed to append exprs", K(ret));
+  } else if (NULL != value_expr_ && OB_FAIL(all_exprs.push_back(value_expr_))) {
+    LOG_WARN("failed to push back expr", K(ret));
+  } else {
+    for (int64_t i = 0; OB_SUCC(ret) && i < stmt->get_column_size(); ++i) {
+      const ColumnItem *col_item = stmt->get_column_item(i);
+      if (col_item->table_id_ == table_id_) {
+        if (OB_NOT_NULL(col_item->default_value_expr_)
+            && OB_FAIL(all_exprs.push_back(col_item->default_value_expr_))) {
+          LOG_WARN("failed to push back expr", K(ret));
+        } else if (OB_NOT_NULL(col_item->default_empty_expr_)
+                   && OB_FAIL(all_exprs.push_back(col_item->default_empty_expr_))) {
+          LOG_WARN("failed to push back expr", K(ret));
+        }
+      }
+    }
+  }
+
+  if (OB_SUCC(ret) && OB_FAIL(ObLogicalOperator::get_op_exprs(all_exprs))) {
+    LOG_WARN("failed to get op exprs", K(ret));
+  }
+
+  return ret;
+}
+
+int ObLogJsonTable::print_my_plan_annotation(char *buf,
+                                                 int64_t &buf_len,
+                                                 int64_t &pos,
+                                                 ExplainType type)
+{
+  int ret = OB_SUCCESS;
+  const ObRawExpr* value = get_value_expr();
+  int64_t tmp_pos = pos;
+
+  if (OB_ISNULL(buf) || OB_ISNULL(value)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("failed to print plan annotation.", K(ret));
+  } else {
+    BUF_PRINTF("\n      ");
+    BUF_PRINTF("JSON_TABLE(");
+    if (OB_FAIL(value->get_name(buf, buf_len, pos, type))) {
+      LOG_WARN("failed to print value expr.", K(ret));
+    }
+    BUF_PRINTF(")");
+    if (OB_FAIL(ret)) {
+      pos = tmp_pos;
+    }
+  }
+  return ret;
+}
+
+uint64_t ObLogJsonTable::hash(uint64_t seed) const
+{
+  seed = do_hash(table_name_, seed);
+  seed = ObLogicalOperator::hash(seed);
+  return seed;
+}
+
+} // namespace sql
+}// namespace oceanbase