init push

2021-05-31 22:56:52 +08:00
commit cea7de1475
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--- a/src/sql/engine/expr/ob_expr_subquery_less_than.cpp
+++ b/src/sql/engine/expr/ob_expr_subquery_less_than.cpp
@ -0,0 +1,65 @@
+/**
+ * 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_subquery_less_than.h"
+#include "common/row/ob_row.h"
+#include "common/object/ob_obj_compare.h"
+#include "sql/engine/expr/ob_expr_less_than.h"
+#include "sql/engine/expr/ob_expr_result_type_util.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+;
+
+ObExprSubQueryLessThan::ObExprSubQueryLessThan(ObIAllocator& alloc)
+    : ObSubQueryRelationalExpr(alloc, T_OP_SQ_LT, N_SQ_LESS_THAN, 2, NOT_ROW_DIMENSION)
+{}
+
+ObExprSubQueryLessThan::~ObExprSubQueryLessThan()
+{}
+
+int ObExprSubQueryLessThan::compare_single_row(
+    const ObNewRow& left_row, const ObNewRow& right_row, ObExprCtx& expr_ctx, ObObj& result) const
+{
+  int ret = OB_SUCCESS;
+  int32_t cmp = 0;
+  if (OB_UNLIKELY(left_row.get_count() != right_row.get_count())) {
+    ret = OB_INVALID_ARGUMENT;
+    LOG_WARN("right and left row is not equal", K(ret));
+  } else {
+    const ObIArray<ObExprCalcType>& cmp_types = result_type_.get_row_calc_cmp_types();
+    for (int64_t i = 0; OB_SUCC(ret) && i < left_row.get_count(); ++i) {
+      const ObObj& left_param = left_row.get_cell(i);
+      const ObObj& right_param = right_row.get_cell(i);
+      if (OB_FAIL(ObSubQueryRelationalExpr::compare_obj(
+              expr_ctx, left_param, right_param, cmp_types.at(i), false, result))) {
+        LOG_WARN("compare subquery obj failed", K(ret));
+      } else if (OB_UNLIKELY(result.is_null())) {
+        break;
+      } else if (OB_FAIL(result.get_int32(cmp))) {
+        LOG_WARN("get int value from result failed", K(result), K(ret));
+      } else if (0 != cmp) {
+        result.set_int32(cmp < 0);
+        break;
+      } else if (i == left_row.get_count() - 1) {
+        result.set_int32(false);
+        break;
+      }
+    }
+  }
+
+  return ret;
+}
+}  // namespace sql
+}  // namespace oceanbase