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https://issues.apache.org/jira/browse/SPARK-20592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16569673#comment-16569673
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Yuming Wang commented on SPARK-20592:
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Spark doesn't support this command:
[https://github.com/apache/spark/blob/73dd6cf9b558f9d752e1f3c13584344257ad7863/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4#L217]
> Alter table concatenate is not working as expected.
> ---------------------------------------------------
>
> Key: SPARK-20592
> URL: https://issues.apache.org/jira/browse/SPARK-20592
> Project: Spark
> Issue Type: Bug
> Components: PySpark
> Affects Versions: 2.1.0, 2.2.1, 2.3.1
> Reporter: Guru Prabhakar Reddy Marthala
> Priority: Major
> Labels: hive, pyspark
>
> Created a table using CTAS from csv to parquet.Parquet table generated
> numerous small files.tried alter table concatenate but it's not working as
> expected.
> spark.sql("CREATE TABLE flight.flight_data(year INT, month INT, day INT,
> day_of_week INT, dep_time INT, crs_dep_time INT, arr_time INT,
> crs_arr_time INT, unique_carrier STRING, flight_num INT, tail_num
> STRING, actual_elapsed_time INT, crs_elapsed_time INT, air_time INT,
> arr_delay INT, dep_delay INT, origin STRING, dest STRING, distance
> INT, taxi_in INT, taxi_out INT, cancelled INT, cancellation_code
> STRING, diverted INT, carrier_delay STRING, weather_delay STRING,
> nas_delay STRING, security_delay STRING, late_aircraft_delay STRING) ROW
> FORMAT DELIMITED FIELDS TERMINATED BY ',' stored as textfile")
> spark.sql("load data local INPATH 'i:/2008/2008.csv' INTO TABLE
> flight.flight_data")
> spark.sql("create table flight.flight_data_pq stored as parquet as select *
> from flight.flight_data")
> spark.sql("create table flight.flight_data_orc stored as orc as select * from
> flight.flight_data")
> pyspark.sql.utils.ParseException: u'\nOperation not allowed: alter table
> concatenate(line 1, pos 0)\n\n== SQL ==\nalter table
> flight_data.flight_data_pq concatenate\n^^^\n'
> Tried on both orc and parquet format.It's not working.
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