spark.sql无法执行基本SQL调用。问题来自

from pyspark.sql import SparkSession

# 初始化 SparkSession
spark = SparkSession.builder \
    .appName("example") \
    .getOrCreate()

# 执行 SQL 调用
result = spark.sql("SELECT * FROM table_name")

# 配置数据库连接属性
spark.conf.set("spark.jars.packages", "org.postgresql:postgresql:42.2.18")

# 执行 SQL 调用
result = spark.sql("SELECT * FROM database_name.table_name")

# 正确的 SQL 语句
result = spark.sql("SELECT * FROM table_name WHERE column = 'value'")

# 检查表是否存在
if spark.catalog.tableExists("table_name"):
    result = spark.sql("SELECT * FROM table_name")
else:
    print("Table does not exist.")

# 配置 Spark 应用程序
spark.conf.set("spark.some.config.option", "some-value")