fix:test case error
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wangmm0220
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8e2a2414c0
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570d78c58d
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@ -90,7 +90,7 @@ class TDTestCase:
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tdSql.execute("create stream stream1 fill_history 1 into sta subtable(concat('new-', tname)) AS SELECT "
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"_wstart, count(*), avg(i) FROM st PARTITION BY tbname tname INTERVAL(1m)", show=True)
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tdSql.execute("create stream stream2 fill_history 1 into sta subtable(concat('new-', tname)) AS SELECT "
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tdSql.execute("create stream stream2 fill_history 1 into stb subtable(concat('new-', tname)) AS SELECT "
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"_wstart, count(*), avg(i) FROM st PARTITION BY tbname tname INTERVAL(1m)", show=True)
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time.sleep(2)
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@ -0,0 +1,243 @@
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# 写一段python代码，生成一个JSON串，json 串为数组，数组长度为10000，每个元素为包含4000个key-value对的JSON字符串，json 数组里每个元素里的4000个key不相同，元素之间使用相同的key，key值为英文单词，value 为int值，且value 的范围是[0, 256]。把json串紧凑形式写入文件，把json串存入parquet文件中，把json串写入avro文件中,把json串写入到postgre sql表中，表有两列第一列主int类型主键，第二列为json类型，数组的每个元素写入json类型里
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import csv
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import json
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import os
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import random
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import string
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import time
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from faker import Faker
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import pandas as pd
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import pyarrow as pa
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import pyarrow.parquet as pq
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import fastavro
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import psycopg2
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from psycopg2.extras import Json
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def get_dir_size(start_path='.'):
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total = 0
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for dirpath, dirs, files in os.walk(start_path):
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for f in files:
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fp = os.path.join(dirpath, f)
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# 获取文件大小并累加到total上
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total += os.path.getsize(fp)
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return total
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def to_avro_record(obj):
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return {key: value for key, value in obj.items()}
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def generate_random_string(length):
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return ''.join(random.choices(string.ascii_letters + string.digits, k=length))
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def generate_random_values(t):
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if t == 0:
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return random.randint(-255, 256)
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elif t == 1:
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return random.randint(-2100000000, 2100000000)
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elif t == 2:
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return random.uniform(-10000.0, 10000.0)
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elif t == 3:
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return generate_random_string(10)
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elif t == 4:
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return random.choice([True, False])
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def generate_json_object(key_set, value_set):
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values = [generate_random_values(t) for t in value_set]
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return dict(zip(key_set, values))
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def generate_json_array(keys, values, array_length):
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return [generate_json_object(keys, values) for _ in range(array_length)]
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def write_parquet_file(parquet_file, json_array):
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df = pd.DataFrame(json_array)
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table = pa.Table.from_pandas(df)
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pq.write_table(table, parquet_file + ".parquet")
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def write_json_file(json_file, json_array):
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with open(json_file + ".json", 'w') as f:
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json.dump(json_array, f, separators=(',', ':'))
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def generate_avro_schema(k, t):
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if t == 0:
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return {"name": k, "type": "int", "logicalType": "int"}
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elif t == 1:
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return {"name": k, "type": "int", "logicalType": "int"}
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elif t == 2:
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return {"name": k, "type": "float"}
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elif t == 3:
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return {"name": k, "type": "string"}
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elif t == 4:
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return {"name": k, "type": "boolean"}
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def write_avro_file(avro_file, json_array, keys, values):
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k = list(json_array[0].keys())
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if keys != k:
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raise ValueError("keys and values should have the same length")
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avro_schema = {
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"type": "record",
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"name": "MyRecord",
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"fields": [generate_avro_schema(k, v) for k, v in dict(zip(keys, values)).items()]
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}
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avro_records = [to_avro_record(obj) for obj in json_array]
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with open(avro_file + ".avro", 'wb') as f:
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fastavro.writer(f, avro_schema, avro_records)
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def write_pg_file(json_array):
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conn_str = "dbname=mydatabase user=myuser host=localhost"
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conn = psycopg2.connect(conn_str)
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cur = conn.cursor()
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cur.execute("drop table if exists my_table")
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conn.commit()
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# 创建表（如果不存在）
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cur.execute("""
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CREATE TABLE IF NOT EXISTS my_table (
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id SERIAL PRIMARY KEY,
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json_data JSONB
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);
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""")
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conn.commit()
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# 执行SQL查询
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cur.execute("SELECT count(*) FROM my_table")
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# 获取查询结果
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rows = cur.fetchall()
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# 打印查询结果
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for row in rows:
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print("rows before:", row[0])
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# 插入数据
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for idx, json_obj in enumerate(json_array):
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# print(json.dumps(json_obj))
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cur.execute("INSERT INTO my_table (json_data) VALUES (%s)", (json.dumps(json_obj),))
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conn.commit() # 提交事务
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# 执行SQL查询
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cur.execute("SELECT count(*) FROM my_table")
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# 获取查询结果
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rows = cur.fetchall()
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# 打印查询结果
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for row in rows:
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print("rows after:", row[0])
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# # 执行SQL查询
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# cur.execute("SELECT pg_relation_size('my_table')")
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# # 获取查询结果
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# rows = cur.fetchall()
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# # 打印查询结果
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# size = 0
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# for row in rows:
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# size = row[0]
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# print("table size:", row[0])
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# 关闭游标和连接
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cur.close()
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conn.close()
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def read_parquet_file(parquet_file):
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table = pq.read_table(parquet_file + ".parquet")
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df = table.to_pandas()
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print(df)
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def read_avro_file(avg_file):
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with open(avg_file + ".avro", 'rb') as f:
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reader = fastavro.reader(f)
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for record in reader:
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print(record)
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def read_json_file(csv_file):
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with open(csv_file + ".json", 'r') as f:
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data = json.load(f)
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print(data)
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def main():
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key_length = 7
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key_sizes = 4000
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row_sizes = 10000
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file_name = "output"
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# cases = [(0, 0), (1, 1), (2, 2), (3, 3), (4, 4), (0, 4)]
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cases = [(2, 2), (3, 3), (0, 4)]
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for data in cases:
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begin, end = data
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print(f"执行类型：{begin}-{end}")
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N = 2
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for _ in range(N):
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t0 = time.time()
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keys = [generate_random_string(key_length) for _ in range(key_sizes)]
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values = [random.randint(begin, end) for _ in range(key_sizes)]
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# 生成JSON数组
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json_array = generate_json_array(keys, values, row_sizes)
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t1 = time.time()
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write_json_file(file_name, json_array)
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t2 = time.time()
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write_parquet_file(file_name, json_array)
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t3 = time.time()
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write_avro_file(file_name, json_array, keys, values)
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t4 = time.time()
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size = write_pg_file(json_array)
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t5 = time.time()
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print("生成json 速度：", t2 - t0, "文件大小：", os.path.getsize(file_name + ".json"))
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print("parquet 速度：", t3 - t2, "文件大小：", os.path.getsize(file_name + ".parquet"))
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print("avro 速度：", t4 - t3, "文件大小：", os.path.getsize(file_name + ".avro"))
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print("pg json 速度：", t5 - t4, "文件大小：", get_dir_size("/opt/homebrew/var/postgresql@14/base/16385") - 8 * 1024 * 1024)
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# read_json_file(file_name)
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# read_parquet_file(file_name)
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# read_avro_file(file_name)
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print(f"\n---------------\n")
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if __name__ == "__main__":
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main()
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# 压缩文件
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# import os
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#
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# import lz4.frame
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#
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#
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# files =["output.json", "output.parquet", "output.avro"]
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# def compress_file(input_path, output_path):
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# with open(input_path, 'rb') as f_in:
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# compressed_data = lz4.frame.compress(f_in.read())
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#
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# with open(output_path, 'wb') as f_out:
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# f_out.write(compressed_data)
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#
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# for file in files:
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# compress_file(file, file + ".lz4")
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# print(file, "origin size:", os.path.getsize(file), " after lsz size:", os.path.getsize(file + ".lz4"))
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