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src/sql/engine/expr/ob_expr_sys_extract_utc.cpp

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+/**
+ * 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_sys_extract_utc.h"
+#include "lib/time/ob_time_utility.h"
+#include "lib/ob_name_def.h"
+#include "sql/session/ob_sql_session_info.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+
+ObExprSysExtractUtc::ObExprSysExtractUtc(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_SYS_EXTRACT_UTC, N_SYS_EXTRACT_UTC, 1, NOT_ROW_DIMENSION)
+{}
+
+int ObExprSysExtractUtc::calc_result_type1(
+    ObExprResType& type, ObExprResType& input, common::ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+  int ret = common::OB_SUCCESS;
+  if (OB_UNLIKELY(!input.get_obj_meta().is_otimestamp_type() && !input.is_null())) {
+    ret = common::OB_ERR_INVALID_TYPE_FOR_ARGUMENT;
+
+    LOG_WARN("invalid type", K(input.get_type()));
+  } else {
+    type.set_timestamp_nano();
+    type.set_scale(input.get_scale());
+    input.set_calc_type(ObTimestampTZType);
+  }
+  return ret;
+}
+
+int ObExprSysExtractUtc::calc_result1(common::ObObj& result, const common::ObObj& input, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (OB_UNLIKELY(input.is_null())) {
+    result.set_null();
+  } else if (OB_UNLIKELY(!input.is_timestamp_tz())) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("input is not timestamp tz", K(input), K(ret));
+  } else {
+    ObOTimestampData tmp_res = input.get_otimestamp_value();
+    tmp_res.time_ctx_.tz_desc_ = 0;
+    tmp_res.time_ctx_.store_tz_id_ = 0;
+    result.set_timestamp_nano(tmp_res);
+  }
+  UNUSED(expr_ctx);
+  return ret;
+}
+
+int ObExprSysExtractUtc::calc_sys_extract_utc(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res)
+{
+  int ret = OB_SUCCESS;
+  ObDatum* in = NULL;
+  if (OB_FAIL(expr.eval_param_value(ctx, in))) {
+    LOG_WARN("eval param failed", K(ret));
+  } else if (in->is_null()) {
+    res.set_null();
+  } else {
+    ObOTimestampData in_timestamp = in->get_otimestamp_tz();
+    in_timestamp.time_ctx_.tz_desc_ = 0;
+    in_timestamp.time_ctx_.store_tz_id_ = 0;
+    res.set_otimestamp_tiny(in_timestamp);
+  }
+  return ret;
+}
+
+int ObExprSysExtractUtc::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_sys_extract_utc;
+  return ret;
+}
+}  // namespace sql
+}  // namespace oceanbase