init push

2021-05-31 22:56:52 +08:00
commit cea7de1475
7020 changed files with 5689869 additions and 0 deletions
--- a/src/sql/engine/expr/ob_expr_fun_default.cpp
+++ b/src/sql/engine/expr/ob_expr_fun_default.cpp
@ -0,0 +1,122 @@
+/**
+ * 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.
+ */
+
+#include "sql/engine/expr/ob_expr_fun_default.h"
+#include "sql/engine/expr/ob_expr_column_conv.h"
+using namespace oceanbase::common;
+
+namespace oceanbase {
+namespace sql {
+
+ObExprFunDefault::ObExprFunDefault(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_DEFAULT, N_DEFAULT, 5, NOT_ROW_DIMENSION)
+{
+  disable_operand_auto_cast();
+}
+
+ObExprFunDefault::~ObExprFunDefault()
+{}
+
+int ObExprFunDefault::calc_result_typeN(
+    ObExprResType& type, ObExprResType* types, int64_t param_num, common::ObExprTypeCtx& type_ctx) const
+{
+  // no need to set calc type of types
+  UNUSED(type_ctx);
+
+  int ret = OB_SUCCESS;
+  // objs[0] type
+  // objs[1] collation_type
+  // objs[2] accuray_expr
+  // objs[3] nullable_expr
+  // objs[4] default_value
+  // objs[5] column_info
+
+  if (param_num != ObExprColumnConv::PARAMS_COUNT_WITH_COLUMN_INFO &&
+      param_num != ObExprColumnConv::PARAMS_COUNT_WITHOUT_COLUMN_INFO) {
+    ret = OB_INVALID_ARGUMENT;
+    SQL_ENG_LOG(WARN, "invalid argument, param_num should be 5 or 6", K(param_num));
+  } else {
+    type.set_type(types[0].get_type());
+    type.set_collation_type(types[1].get_collation_type());
+    type.set_collation_level(CS_LEVEL_IMPLICIT);
+    type.set_accuracy(types[2].get_accuracy());
+  }
+  return ret;
+}
+
+int ObExprFunDefault::calc_resultN(ObObj& result, const ObObj* objs, int64_t param_num, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  // objs[0] type
+  // objs[1] collation_type
+  // objs[2] accuray_expr
+  // objs[3] nullable_expr
+  // objs[4] default_value
+  // objs[5] column_info
+  UNUSED(expr_ctx);
+  if ((param_num != ObExprColumnConv::PARAMS_COUNT_WITH_COLUMN_INFO &&
+          param_num != ObExprColumnConv::PARAMS_COUNT_WITHOUT_COLUMN_INFO) ||
+      OB_ISNULL(objs)) {
+    ret = OB_INVALID_ARGUMENT;
+    SQL_ENG_LOG(WARN, "invalid argument", K(ret), K(param_num), K(objs));
+  } else if (objs[4].is_null()) {
+    if (!lib::is_oracle_mode() && !objs[3].get_bool()) {
+      ret = OB_ERR_NO_DEFAULT_FOR_FIELD;
+      SQL_ENG_LOG(WARN, "Field doesn't have a default value", K(objs[3]), K(objs[4]));
+    }
+  }
+  if (OB_SUCC(ret)) {
+    result = objs[4];
+  }
+  return ret;
+}
+
+int ObExprFunDefault::calc_default_expr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res)
+{
+  int ret = OB_SUCCESS;
+  // objs[0] type
+  // objs[1] collation_type
+  // objs[2] accuray_expr
+  // objs[3] nullable_expr
+  // objs[4] default_value
+  // objs[5] column_info
+  ObDatum* nullable = NULL;
+  ObDatum* def = NULL;
+  if (OB_UNLIKELY(expr.arg_cnt_ != ObExprColumnConv::PARAMS_COUNT_WITH_COLUMN_INFO &&
+                  expr.arg_cnt_ != ObExprColumnConv::PARAMS_COUNT_WITHOUT_COLUMN_INFO)) {
+    ret = OB_INVALID_ARGUMENT_NUM;
+    SQL_ENG_LOG(WARN, "arg cnt must be 5", K(ret), K(expr.arg_cnt_));
+  } else if (OB_FAIL(expr.args_[3]->eval(ctx, nullable)) || OB_FAIL(expr.args_[4]->eval(ctx, def))) {
+    SQL_ENG_LOG(WARN, "eval arg failed", K(ret));
+  } else if (def->is_null()) {
+    if (!lib::is_oracle_mode() && !nullable->get_bool()) {
+      ret = OB_ERR_NO_DEFAULT_FOR_FIELD;
+      SQL_ENG_LOG(WARN, "Field doesn't have a default value", K(ret));
+    }
+  }
+  if (OB_SUCC(ret)) {
+    res.set_datum(*def);
+  }
+  return ret;
+}
+
+int ObExprFunDefault::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);
+  rt_expr.eval_func_ = calc_default_expr;
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase