4d516bece8
Describe the overview of changes. 1. add function element_at; 2. support element_subscript([]) to get element of array, col_array[N] <==> element_at(col_array, N); 3. return error message instead of BE crash while array function execute failed; element_at(array, index) desc: > Returns element of array at given **(1-based)** index. If **index < 0**, accesses elements from the last to the first. Returns NULL if the index exceeds the length of the array or the array is NULL. Usage example: 1. create table with ARRAY type column and insert some data: ``` +------+------+--------+ | k1 | k2 | k3 | +------+------+--------+ | 1 | 2 | [1, 2] | | 2 | 3 | NULL | | 4 | NULL | [] | | 3 | NULL | NULL | +------+------+--------+ ``` 2. enable vectorized: ``` set enable_vectorized_engine=true; ``` 3. element_subscript([]) usage example: ``` > select k1,k3,k3[1] from array_test; +------+--------+----------------------------+ | k1 | k3 | %element_extract%(`k3`, 1) | +------+--------+----------------------------+ | 3 | NULL | NULL | | 1 | [1, 2] | 1 | | 2 | NULL | NULL | | 4 | [] | NULL | +------+--------+----------------------------+ ``` 4. element_at function usage example: ``` > select k1,k3 from array_test where element_at(k3, -1) = 2; +------+--------+ | k1 | k3 | +------+--------+ | 1 | [1, 2] | +------+--------+ ```
85 lines
3.1 KiB
C++
85 lines
3.1 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 <gtest/gtest.h>
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#include <time.h>
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#include <string>
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#include "function_test_util.h"
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#include "runtime/tuple_row.h"
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#include "util/url_coding.h"
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#include "vec/core/field.h"
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namespace doris::vectorized {
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TEST(function_array_element_test, element_at) {
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std::string func_name = "element_at";
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Array empty_arr;
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// element_at(Array<Int32>, Int32)
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{
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InputTypeSet input_types = {TypeIndex::Array, TypeIndex::Int32, TypeIndex::Int32};
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Array vec = {Int32(1), Int32(2), Int32(3)};
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DataSet data_set = {
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{{vec, 0}, Null()}, {{vec, 1}, Int32(1)}, {{vec, 4}, Null()},
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{{vec, -1}, Int32(3)}, {{vec, -3}, Int32(1)}, {{vec, -4}, Null()},
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{{Null(), 1}, Null()}, {{empty_arr, 0}, Null()}, {{empty_arr, 1}, Null()}};
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check_function<DataTypeInt32, true>(func_name, input_types, data_set);
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}
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// element_at(Array<Int8>, Int32)
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{
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InputTypeSet input_types = {TypeIndex::Array, TypeIndex::Int8, TypeIndex::Int32};
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Array vec = {Int8(1), Int8(2), Int8(3)};
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DataSet data_set = {
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{{vec, 0}, Null()}, {{vec, 1}, Int8(1)}, {{vec, 4}, Null()},
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{{vec, -1}, Int8(3)}, {{vec, -3}, Int8(1)}, {{vec, -4}, Null()},
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{{Null(), 1}, Null()}, {{empty_arr, 0}, Null()}, {{empty_arr, 1}, Null()}};
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check_function<DataTypeInt8, true>(func_name, input_types, data_set);
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}
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// element_at(Array<String>, Int32)
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{
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InputTypeSet input_types = {TypeIndex::Array, TypeIndex::String, TypeIndex::Int32};
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Array vec = {Field("abc", 3), Field("", 0), Field("def", 3)};
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DataSet data_set = {{{vec, 1}, std::string("abc")},
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{{vec, 2}, std::string("")},
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{{vec, 10}, Null()},
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{{vec, -2}, std::string("")},
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{{vec, 0}, Null()},
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{{vec, -10}, Null()},
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{{Null(), 1}, Null()},
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{{empty_arr, 0}, Null()},
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{{empty_arr, 1}, Null()}};
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check_function<DataTypeString, true>(func_name, input_types, data_set);
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}
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}
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} // namespace doris::vectorized
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int main(int argc, char** argv) {
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::testing::InitGoogleTest(&argc, argv);
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return RUN_ALL_TESTS();
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}
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