86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
/**
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* Copyright (c) 2021 OceanBase
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* OceanBase CE is licensed under Mulan PubL v2.
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* You can use this software according to the terms and conditions of the Mulan PubL v2.
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* You may obtain a copy of Mulan PubL v2 at:
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* http://license.coscl.org.cn/MulanPubL-2.0
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* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
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* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
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* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
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* See the Mulan PubL v2 for more details.
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*/
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#include "sql/engine/expr/ob_expr_last_trace_id.h"
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#include "sql/session/ob_sql_session_info.h"
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#include "sql/engine/ob_exec_context.h"
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using namespace oceanbase::common;
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namespace oceanbase
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{
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namespace sql
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{
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ObExprLastTraceId::ObExprLastTraceId(ObIAllocator &alloc)
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: ObStringExprOperator(alloc, T_FUN_GET_LAST_TRACE_ID, N_LAST_TRACE_ID, 0, NOT_VALID_FOR_GENERATED_COL)
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{
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}
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ObExprLastTraceId::~ObExprLastTraceId()
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{
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}
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int ObExprLastTraceId::calc_result_type0(ObExprResType &type, ObExprTypeCtx &type_ctx) const
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{
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UNUSED(type_ctx);
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type.set_varchar();
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type.set_default_collation_type();
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type.set_collation_level(CS_LEVEL_SYSCONST);
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type.set_length(OB_MAX_DATABASE_NAME_LENGTH);
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return OB_SUCCESS;
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}
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int ObExprLastTraceId::eval_last_trace_id(const ObExpr &expr, ObEvalCtx &ctx,
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ObDatum &expr_datum)
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{
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int ret = OB_SUCCESS;
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UNUSED(expr);
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const ObPhysicalPlanCtx *phy_plan_ctx = NULL;
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if (OB_ISNULL(phy_plan_ctx = ctx.exec_ctx_.get_physical_plan_ctx())) {
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ret = OB_ERR_UNEXPECTED;
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SQL_ENG_LOG(WARN, "session info is null", K(ret));
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} else {
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const ObCurTraceId::TraceId &trace_id = phy_plan_ctx->get_last_trace_id();
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if (trace_id.is_invalid()) {
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expr_datum.set_null();
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} else {
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const int64_t MAX_BUF_LEN = 128;
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char *buf = expr.get_str_res_mem(ctx, MAX_BUF_LEN);
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int64_t pos = 0;
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if (OB_ISNULL(buf)) {
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ret = OB_ERR_UNEXPECTED;
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SERVER_LOG(WARN, "buff is null", K(ret));
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} else {
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if (OB_FAIL(databuff_printf(buf, MAX_BUF_LEN, pos, "%s",
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to_cstring(trace_id)))) {
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SQL_ENG_LOG(WARN, "fail to databuff_printf", K(ret));
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} else {
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expr_datum.set_string(buf, pos);
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}
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}
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}
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}
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return ret;
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}
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int ObExprLastTraceId::cg_expr(ObExprCGCtx &op_cg_ctx, const ObRawExpr &raw_expr,
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ObExpr &rt_expr) const
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{
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UNUSED(raw_expr);
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UNUSED(op_cg_ctx);
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rt_expr.eval_func_ = ObExprLastTraceId::eval_last_trace_id;
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return OB_SUCCESS;
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}
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}
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}
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