34 lines
1.2 KiB
Python
34 lines
1.2 KiB
Python
import taos
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conn = taos.connect()
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conn.execute("DROP DATABASE IF EXISTS test")
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conn.execute("CREATE DATABASE test keep 36500")
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conn.select_db("test")
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conn.execute("CREATE STABLE weather(ts TIMESTAMP, temperature FLOAT) TAGS (location INT)")
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# prepare data
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for i in range(2000):
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location = str(i % 10)
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tb = "t" + location
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conn.execute(f"INSERT INTO {tb} USING weather TAGS({location}) VALUES (now+{i}a, 23.5) (now+{i + 1}a, 23.5)")
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result: taos.TaosResult = conn.query("SELECT * FROM weather")
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block_index = 0
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blocks: taos.TaosBlocks = result.blocks_iter()
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for rows, length in blocks:
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print("block ", block_index, " length", length)
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print("first row in this block:", rows[0])
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block_index += 1
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conn.close()
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# possible output:
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# block 0 length 1200
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# first row in this block: (datetime.datetime(2022, 4, 27, 15, 14, 52, 46000), 23.5, 0)
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# block 1 length 1200
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# first row in this block: (datetime.datetime(2022, 4, 27, 15, 14, 52, 76000), 23.5, 3)
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# block 2 length 1200
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# first row in this block: (datetime.datetime(2022, 4, 27, 15, 14, 52, 99000), 23.5, 6)
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# block 3 length 400
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# first row in this block: (datetime.datetime(2022, 4, 27, 15, 14, 52, 122000), 23.5, 9)
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