110 lines
3.8 KiB
C++
110 lines
3.8 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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#include "exec/schema_scanner/schema_variables_scanner.h"
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#include "runtime/primitive_type.h"
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#include "runtime/string_value.h"
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#include "runtime/runtime_state.h"
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#include "exec/schema_scanner/schema_helper.h"
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namespace doris {
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SchemaScanner::ColumnDesc SchemaVariablesScanner::_s_vars_columns[] = {
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// name, type, size
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{ "VARIABLE_NAME", TYPE_VARCHAR, sizeof(StringValue), false},
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{ "VARIABLE_VALUE", TYPE_VARCHAR, sizeof(StringValue), false},
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};
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SchemaVariablesScanner::SchemaVariablesScanner(TVarType::type type) :
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SchemaScanner(_s_vars_columns,
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sizeof(_s_vars_columns) / sizeof(SchemaScanner::ColumnDesc)),
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_type(type) {
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}
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SchemaVariablesScanner::~SchemaVariablesScanner() {
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}
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Status SchemaVariablesScanner::start(RuntimeState *state) {
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TShowVariableRequest var_params;
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// Use db to save type
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if (_param->db != nullptr) {
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if (strcmp(_param->db->c_str(), "GLOBAL") == 0) {
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var_params.__set_varType(TVarType::GLOBAL);
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} else {
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var_params.__set_varType(TVarType::SESSION);
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}
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} else {
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var_params.__set_varType(_type);
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}
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var_params.__set_threadId(_param->thread_id);
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if (NULL != _param->ip && 0 != _param->port) {
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RETURN_IF_ERROR(SchemaHelper::show_varialbes(*(_param->ip),
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_param->port, var_params, &_var_result));
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} else {
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return Status("IP or port dosn't exists");
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}
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_begin = _var_result.variables.begin();
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return Status::OK;
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}
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Status SchemaVariablesScanner::fill_one_row(Tuple *tuple, MemPool *pool) {
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// variables names
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{
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void *slot = tuple->get_slot(_tuple_desc->slots()[0]->tuple_offset());
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StringValue *str_slot = reinterpret_cast<StringValue*>(slot);
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int len = strlen(_begin->first.c_str());
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str_slot->ptr = (char *)pool->allocate(len + 1);
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if (NULL == str_slot->ptr) {
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return Status("No Memory.");
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}
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memcpy(str_slot->ptr, _begin->first.c_str(), len + 1);
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str_slot->len = len;
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}
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// value
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{
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void *slot = tuple->get_slot(_tuple_desc->slots()[1]->tuple_offset());
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StringValue *str_slot = reinterpret_cast<StringValue*>(slot);
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int len = strlen(_begin->second.c_str());
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str_slot->ptr = (char *)pool->allocate(len + 1);
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if (NULL == str_slot->ptr) {
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return Status("No Memory.");
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}
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memcpy(str_slot->ptr, _begin->second.c_str(), len + 1);
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str_slot->len = len;
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}
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++_begin;
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return Status::OK;
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}
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Status SchemaVariablesScanner::get_next_row(Tuple *tuple, MemPool *pool, bool *eos) {
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if (!_is_init) {
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return Status("call this before initial.");
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}
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if (_begin == _var_result.variables.end()) {
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*eos = true;
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return Status::OK;
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}
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if (NULL == tuple || NULL == pool || NULL == eos) {
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return Status("invalid parameter.");
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}
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*eos = false;
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return fill_one_row(tuple, pool);
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}
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}
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