timestamp_seconds(seconds)

Описание

Функция timestamp_seconds() преобразует количество секунд с начала эпохи Unix (1970-01-01 00:00:00 UTC) во временную метку.

Параметры

• seconds: Column - количество секунд с начала эпохи Unix

Возвращаемое значение

Column - временная метка

Пример использования

from pyspark.sql.functions import timestamp_seconds, current_timestamp, unix_timestamp, lit
from pyspark.sql import SparkSession

# Создаем SparkSession
spark = SparkSession.builder.appName("timestamp_seconds_example").getOrCreate()

# Создаем DataFrame с секундами
data = [
    (1710921600,),  # 2024-03-20 00:00:00
    (1710921601,),  # 2024-03-20 00:00:01
    (1710921602,)   # 2024-03-20 00:00:02
]
df = spark.createDataFrame(data, ["seconds"])

# Преобразуем секунды во временные метки
df = df.withColumn("timestamp", timestamp_seconds("seconds"))
df.show(truncate=False)

# Результат:
# +--------+-----------------------+
# |seconds |timestamp              |
# +--------+-----------------------+
# |1710921600|2024-03-20 00:00:00   |
# |1710921601|2024-03-20 00:00:01   |
# |1710921602|2024-03-20 00:00:02   |
# +--------+-----------------------+

Примечания

• Принимает количество секунд с начала эпохи Unix
• Возвращает NULL, если входное значение NULL
• Поддерживает точность до секунд
• Для преобразования в миллисекунды используйте timestamp_millis()
• Для преобразования в микросекунды используйте timestamp_micros()
• Полезно для работы с временными метками в секундах

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функции для работы с битовыми картами

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функции преобразования типов

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функции шифрования

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