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_period_diff.cpp
+++ b/src/sql/engine/expr/ob_expr_period_diff.cpp
@ -0,0 +1,128 @@
+/**
+ * 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_period_diff.h"
+#include "lib/ob_name_def.h"
+#include "lib/timezone/ob_time_convert.h"
+#include "share/object/ob_obj_cast.h"
+#include "sql/session/ob_sql_session_info.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+
+ObExprPeriodDiff::ObExprPeriodDiff(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_PERIOD_DIFF, N_PERIOD_DIFF, 2, NOT_ROW_DIMENSION)
+{}
+
+ObExprPeriodDiff::~ObExprPeriodDiff()
+{}
+
+int ObExprPeriodDiff::calc_result2(ObObj& result, const ObObj& left, const ObObj& right, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (OB_UNLIKELY(left.is_null() || right.is_null())) {
+    result.set_null();
+  } else {
+    TYPE_CHECK(left, ObUInt64Type);
+    TYPE_CHECK(right, ObUInt64Type);
+    if (OB_SUCC(ret)) {
+      ret = calc(result, left, right);
+    }
+  }
+  UNUSED(expr_ctx);
+  return ret;
+}
+
+template <typename T>
+int ObExprPeriodDiff::calc(T& result, const T& left, const T& right)
+{
+  int ret = OB_SUCCESS;
+  uint64_t lvalue = left.get_uint64();
+  uint64_t rvalue = right.get_uint64();
+  uint64_t lyear = 0;
+  uint64_t lmonth = 0;
+  uint64_t ryear = 0;
+  uint64_t rmonth = 0;
+  int64_t diff = 0;
+  if (OB_FAIL(get_year_month(lvalue, lyear, lmonth))) {
+    LOG_WARN("get_year_month failed", K(ret), K(lvalue), K(lyear), K(lmonth));
+  } else if (OB_FAIL(get_year_month(rvalue, ryear, rmonth))) {
+    LOG_WARN("get_year_month failed", K(ret), K(rvalue), K(ryear), K(rmonth));
+  } else {
+    diff = static_cast<int64_t>((lyear - ryear) * MONS_PER_YEAR + lmonth - rmonth);
+    result.set_int(diff);
+  }
+  return ret;
+}
+
+int ObExprPeriodDiff::get_year_month(const uint64_t value, uint64_t& year, uint64_t& month)
+{
+  int ret = OB_SUCCESS;
+  const uint64_t YEAR_BASE_YEAR = 1900;
+  const uint64_t YEAR_VALUE_FACTOR = 100;
+  const uint64_t YEAR_ADJUST_THRESHOLD = 70;
+  const uint64_t YEAR_ADJUST_OFFSET = 2000;
+  year = value / YEAR_VALUE_FACTOR;
+  uint64_t tmp = year;
+  /*
+   *11(uint) will be treat as 11 + YEAR_ADJUST_OFFSET = 2011(year)
+   *68(uint) will be treat as 68 + YEAR_BASE_YEAR = 1968(year)
+   *1234(uint) will be treat as 1234(year)
+   */
+  if (year < YEAR_ADJUST_THRESHOLD)
+    year += YEAR_ADJUST_OFFSET;
+  else if (tmp < YEAR_VALUE_FACTOR)
+    year += YEAR_BASE_YEAR;
+  month = value - tmp * YEAR_VALUE_FACTOR;  // % operation ? too expensive !
+  return ret;
+}
+
+int ObExprPeriodDiff::cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
+{
+  UNUSED(op_cg_ctx);
+  UNUSED(raw_expr);
+  int ret = OB_SUCCESS;
+  if (rt_expr.arg_cnt_ != 2) {
+    ret = OB_INVALID_ARGUMENT;
+    LOG_WARN("perioddiff expr should have two params", K(ret), K(rt_expr.arg_cnt_));
+  } else if (OB_ISNULL(rt_expr.args_) || OB_ISNULL(rt_expr.args_[0]) || OB_ISNULL(rt_expr.args_[1])) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("children of perioddiff expr is null", K(ret), K(rt_expr.args_));
+  } else {
+    CK(ObUInt64Type == rt_expr.args_[0]->datum_meta_.type_);
+    CK(ObUInt64Type == rt_expr.args_[1]->datum_meta_.type_);
+    rt_expr.eval_func_ = ObExprPeriodDiff::calc_perioddiff;
+  }
+  return ret;
+}
+
+int ObExprPeriodDiff::calc_perioddiff(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
+{
+  int ret = OB_SUCCESS;
+  ObDatum* param_datum1 = NULL;
+  ObDatum* param_datum2 = NULL;
+  if (OB_FAIL(expr.eval_param_value(ctx, param_datum1, param_datum2))) {
+    LOG_WARN("eval param value failed", K(ret));
+  } else if (OB_UNLIKELY(param_datum1->is_null() || param_datum2->is_null())) {
+    expr_datum.set_null();
+  } else {
+    ObDatum* res_datum = static_cast<ObDatum*>(&expr_datum);
+    ret = calc(*res_datum, *param_datum1, *param_datum2);
+  }
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase