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_convert.cpp
+++ b/src/sql/engine/expr/ob_expr_convert.cpp
@ -0,0 +1,100 @@
+/**
+ * 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 "ob_expr_convert.h"
+
+#include "lib/charset/ob_charset.h"
+#include "sql/engine/expr/ob_expr_cast.h"
+#include "sql/session/ob_sql_session_info.h"
+
+using namespace oceanbase::common;
+using namespace oceanbase::sql;
+namespace oceanbase {
+namespace sql {
+
+ObExprConvert::ObExprConvert(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_CONVERT, N_CONVERT, 2, NOT_ROW_DIMENSION)
+{}
+
+ObExprConvert::~ObExprConvert()
+{}
+
+int ObExprConvert::calc_result_type2(
+    ObExprResType& type, ObExprResType& type1, ObExprResType& type2, ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+
+  int ret = OB_SUCCESS;
+  type.set_type(type1.get_type());
+  type.set_scale(type1.get_scale());
+  type.set_precision(type1.get_precision());
+  if (ob_is_string_type(type.get_type())) {
+    type.set_length(type1.get_length());
+  }
+  const ObObj& dest_collation = type2.get_param();
+  TYPE_CHECK(dest_collation, ObVarcharType);
+  if (OB_SUCC(ret)) {
+    ObString cs_name = dest_collation.get_string();
+    ObCharsetType charset_type = CHARSET_INVALID;
+    if (CHARSET_INVALID == (charset_type = ObCharset::charset_type(cs_name.trim()))) {
+      ret = OB_ERR_UNKNOWN_CHARSET;
+      LOG_WARN("unknown charset", K(ret), K(cs_name));
+    } else {
+      type.set_collation_level(CS_LEVEL_EXPLICIT);
+      type.set_collation_type(ObCharset::get_default_collation(charset_type));
+      // set calc type
+      // only set type2 here.
+      type2.set_calc_type(ObVarcharType);
+      type1.set_calc_meta(type.get_obj_meta());
+      type1.set_calc_collation_type(type.get_collation_type());
+      type1.set_calc_collation_level(type.get_collation_level());
+      LOG_DEBUG("in calc result type", K(ret), K(type1), K(type2), K(type));
+    }
+  }
+
+  return ret;
+}
+
+int ObExprConvert::calc_result2(ObObj& result, const ObObj& obj1, const ObObj& obj2, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  UNUSED(obj2);
+  UNUSED(expr_ctx);
+  result = obj1;
+  return ret;
+}
+
+int calc_convert_expr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum)
+{
+  int ret = OB_SUCCESS;
+  ObDatum* child_res = NULL;
+  if (OB_FAIL(expr.args_[0]->eval(ctx, child_res))) {
+    LOG_WARN("eval arg 0 failed", K(ret));
+  } else {
+    res_datum.set_datum(*child_res);
+  }
+  return ret;
+}
+
+int ObExprConvert::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_convert_expr;
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase