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56 lines
1.4 KiB
Python
56 lines
1.4 KiB
Python
from pyspark.sql import SparkSession
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TEST_CASE_NAME = "PythonHiveInHiveOut"
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DATA_DIR = "../resources/data"
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TEST_DB = TEST_CASE_NAME
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spark = SparkSession \
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.builder \
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.appName(TEST_CASE_NAME) \
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.enableHiveSupport() \
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.getOrCreate()
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def tbl(tbl_name):
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return TEST_DB + "." + tbl_name
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spark.sql("DROP DATABASE IF EXISTS " + TEST_DB + " CASCADE")
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spark.sql("CREATE DATABASE IF NOT EXISTS " + TEST_DB)
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spark.sql("DROP TABLE IF EXISTS " +tbl("hivetab"))
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spark.sql("DROP TABLE IF EXISTS " +tbl("foo5"))
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df1 = spark.read \
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.option("header", "true") \
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.csv(DATA_DIR + "/in1.csv") \
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.withColumnRenamed("c1", "a") \
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.withColumnRenamed("c2", "b")
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df2 = spark.read \
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.option("header", "true") \
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.csv(DATA_DIR + "/in2.csv") \
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.withColumnRenamed("c1", "c") \
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.withColumnRenamed("c2", "d")
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df1.createOrReplaceTempView("v1")
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df2.createOrReplaceTempView("v2")
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# CreateHiveTableAsSelectCommand
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spark.sql(
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"create table " + tbl("foo5") + " as " + "(select v1.a, v1.b, v2.c, v2.d from v1 join v2 on v1.id = v2.id)")
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# CreateHiveTableAsSelectCommand
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spark.sql("create table " + tbl("hivetab") + " as " + "(select * from " + tbl("foo5") + ")");
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# InsertIntoHiveTable
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spark.sql("insert into " + tbl("hivetab") + " (select * from " + tbl("foo5") + ")");
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df = spark.sql("select * from " + tbl("foo5"));
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# InsertIntoHiveTable
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df.write.insertInto(tbl("hivetab"));
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spark.stop()
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