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src/sql/engine/expr/ob_expr_bit_neg.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 "ob_expr_bit_neg.h"
+#include "lib/oblog/ob_log.h"
+#include "sql/ob_sql_utils.h"
+#include "sql/session/ob_sql_session_info.h"
+#include "sql/engine/ob_exec_context.h"
+
+using namespace oceanbase::sql;
+using namespace oceanbase::common;
+namespace oceanbase {
+namespace sql {
+
+ObExprBitNeg::ObExprBitNeg(ObIAllocator& alloc)
+    : ObBitwiseExprOperator(alloc, T_OP_BIT_NEG, N_BIT_NEG, 1, NOT_ROW_DIMENSION)
+{}
+
+int ObExprBitNeg::calc_result1(ObObj& res, const ObObj& obj1, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (OB_ISNULL(expr_ctx.calc_buf_)) {
+    ret = OB_NOT_INIT;
+    LOG_WARN("buf not init", K(ret));
+  } else if (obj1.is_null()) {
+    res.set_null();
+  } else {
+    uint64_t uint64_v1 = 0;
+    if (OB_SUCC(ret)) {
+      const bool is_round = true;
+      if (OB_FAIL(ObBitwiseExprOperator::get_uint64(obj1, expr_ctx, is_round, uint64_v1))) {
+        LOG_WARN("fail to get uint64_t", K(obj1), K(ret));
+      } else {
+        uint64_t bit_neg_res = ~uint64_v1;
+        res.set_uint64(bit_neg_res);
+      }
+    }
+  }
+  return ret;
+}
+
+int ObExprBitNeg::calc_bitneg_expr(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& res_datum)
+{
+  int ret = OB_SUCCESS;
+  uint64_t uint_val = 0;
+  ObDatum* child_res = NULL;
+  ObCastMode cast_mode = CM_NONE;
+  void* get_uint_func = NULL;
+  if (OB_UNLIKELY(1 != expr.arg_cnt_)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("invalid arg cnt", K(ret), K(expr.arg_cnt_));
+  } else if (OB_FAIL(expr.args_[0]->eval(ctx, child_res))) {
+    LOG_WARN("eval arg failed", K(ret));
+  } else if (child_res->is_null()) {
+    res_datum.set_null();
+  } else if (OB_FAIL(choose_get_int_func(expr.args_[0]->datum_meta_.type_, get_uint_func))) {
+    LOG_WARN("choose_get_int_func failed", K(ret), K(expr.args_[0]->datum_meta_));
+  } else if (OB_FAIL(ObSQLUtils::get_default_cast_mode(false, 0, ctx.exec_ctx_.get_my_session(), cast_mode))) {
+    LOG_WARN("get_default_cast_mode failed", K(ret));
+  } else if (OB_FAIL((reinterpret_cast<GetUIntFunc>(get_uint_func)(*child_res, true, uint_val, cast_mode)))) {
+    LOG_WARN("get uint from datum failed", K(ret), K(*child_res), K(cast_mode));
+  } else {
+    res_datum.set_uint(~uint_val);
+  }
+  return ret;
+}
+
+int ObExprBitNeg::cg_expr(ObExprCGCtx& expr_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
+{
+  int ret = OB_SUCCESS;
+  const BitOperator op = BIT_NEG;
+  if (OB_FAIL(cg_bitwise_expr(expr_cg_ctx, raw_expr, rt_expr, op))) {
+    LOG_WARN("cg_bitwise_expr for bitneg failed", K(ret), K(rt_expr));
+  } else {
+    rt_expr.eval_func_ = calc_bitneg_expr;
+  }
+
+  return ret;
+}
+}  // namespace sql
+}  // namespace oceanbase