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_rownum.cpp
+++ b/src/sql/engine/expr/ob_expr_rownum.cpp
@ -0,0 +1,102 @@
+/**
+ * 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_rownum.h"
+#include "sql/engine/basic/ob_count.h"
+#include "sql/engine/basic/ob_count_op.h"
+#include "sql/engine/ob_exec_context.h"
+#include "sql/code_generator/ob_static_engine_expr_cg.h"
+#include "sql/engine/expr/ob_expr_util.h"
+
+namespace oceanbase {
+using namespace common;
+namespace sql {
+
+OB_SERIALIZE_MEMBER((ObExprRowNum, ObFuncExprOperator), operator_id_);
+
+ObExprRowNum::ObExprRowNum(ObIAllocator& alloc)
+    : ObFuncExprOperator(alloc, T_FUN_SYS_ROWNUM, "rownum", 0, NOT_ROW_DIMENSION), operator_id_(OB_INVALID_ID)
+{}
+
+ObExprRowNum::~ObExprRowNum()
+{}
+
+int ObExprRowNum::calc_result_type0(ObExprResType& type, ObExprTypeCtx& type_ctx) const
+{
+  UNUSED(type_ctx);
+  type.set_number();
+  type.set_scale(ObAccuracy::DDL_DEFAULT_ACCURACY[ObNumberType].scale_);
+  type.set_precision(ObAccuracy::DDL_DEFAULT_ACCURACY[ObNumberType].precision_);
+  return OB_SUCCESS;
+}
+
+int ObExprRowNum::calc_result0(ObObj& result, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (OB_ISNULL(expr_ctx.exec_ctx_) || OB_ISNULL(expr_ctx.calc_buf_)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("exec ctx is null", K(ret), K(expr_ctx.exec_ctx_), K(expr_ctx.calc_buf_));
+  } else {
+    ObExecContext& exec_ctx = *expr_ctx.exec_ctx_;
+    ObCount::ObCountCtx* count_ctx = NULL;
+    number::ObNumber num;
+    uint64_t count_op_id = OB_INVALID_ID == operator_id_ ? expr_ctx.phy_operator_ctx_id_ : operator_id_;
+    if (OB_ISNULL(count_ctx = GET_PHY_OPERATOR_CTX(ObCount::ObCountCtx, exec_ctx, count_op_id))) {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_WARN("get physical operator ctx failed", K(ret));
+    } else if (OB_FAIL(num.from(count_ctx->cur_rownum_, *expr_ctx.calc_buf_))) {
+      LOG_WARN("failed to convert int as number", K(ret));
+    } else {
+      result.set_number(num);
+    }
+  }
+  return ret;
+}
+
+int ObExprRowNum::cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
+{
+  int ret = OB_SUCCESS;
+  UNUSED(raw_expr);
+  UNUSED(op_cg_ctx);
+  rt_expr.extra_ = operator_id_;
+  rt_expr.eval_func_ = &rownum_eval;
+  return ret;
+}
+
+int ObExprRowNum::rownum_eval(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
+{
+  int ret = OB_SUCCESS;
+  uint64_t operator_id = expr.extra_;
+  ObOperatorKit* kit = ctx.exec_ctx_.get_operator_kit(operator_id);
+  if (OB_ISNULL(kit) || OB_ISNULL(kit->op_)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("operator is NULL", K(ret), K(operator_id), KP(kit));
+  } else if (OB_UNLIKELY(PHY_COUNT != kit->op_->get_spec().type_)) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("is not count operator", K(ret), K(operator_id), "spec", kit->op_->get_spec());
+  } else {
+    char local_buff[number::ObNumber::MAX_BYTE_LEN];
+    ObDataBuffer local_alloc(local_buff, number::ObNumber::MAX_BYTE_LEN);
+    number::ObNumber num;
+    ObCountOp* count_op = static_cast<ObCountOp*>(kit->op_);
+    if (OB_FAIL(num.from(count_op->get_cur_rownum(), local_alloc))) {
+      LOG_WARN("failed to convert int to number", K(ret));
+    } else {
+      expr_datum.set_number(num);
+    }
+  }
+  return ret;
+}
+
+} /* namespace sql */
+} /* namespace oceanbase */