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https://issues.apache.org/jira/browse/SPARK-13699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15181780#comment-15181780
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Dhaval Modi commented on SPARK-13699:
-------------------------------------
================== Code Snippet =======================================
val sqlContext = new org.apache.spark.sql.hive.HiveContext(sc);
val src=sqlContext.sql("select * from src_table");
val tgt=sqlContext.sql("select * from tgt_table");
var tgtFinal=tgt.filter("currind = 'N'"); //Add to final table
val tgtActive=tgt.filter("currind = 'Y'");
#src.select("col1").except(src.select("col1").as('a).join(tgtActive.select("col1").as('b),"col1"))
val newTgt1 = tgtActive.as('a).join(src.as('b),$"a.col1" === $"b.col1")
#val newTgt2 = tgtActive.except(newTgt1.select("a.*"));
tgtFinal = tgtFinal.unionAll(tgtActive.except(newTgt1.select("a.*")));
var srcInsert = src.except(newTgt1.select("b.*"))
import org.apache.spark.sql._
val inBatchID = udf((t:String) => "13" )
val inCurrInd = udf((t:String) => "Y" )
val NCurrInd = udf((t:String) => "N" )
val endDate = udf((t:String) => "9999-12-31 23:59:59")
tgtFinal = tgtFinal.unionAll(newTgt1.select("a.*").withColumn("currInd",
NCurrInd(col("col1"))).withColumn("endDate",
current_timestamp()).withColumn("updateDate", current_timestamp()))
srcInsert = src.withColumn("batchId",
inBatchID(col("col1"))).withColumn("currInd",
inCurrInd(col("col1"))).withColumn("startDate",
current_timestamp()).withColumn("endDate",
date_format(endDate(col("col1")),"yyyy-MM-dd
HH:mm:ss")).withColumn("updateDate", current_timestamp())
tgtFinal = tgtFinal.unionAll(srcInsert)
tgtFinal.write().mode(SaveMode.Append).saveAsTable(tgt_table)
======================= Code Snippet =================================
> Spark SQL drops the table in "overwrite" mode while writing into table
> ----------------------------------------------------------------------
>
> Key: SPARK-13699
> URL: https://issues.apache.org/jira/browse/SPARK-13699
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 1.6.0
> Reporter: Dhaval Modi
> Attachments: stackTrace.txt
>
>
> Hi,
> While writing the dataframe to HIVE table with "SaveMode.Overwrite" option.
> E.g.
> tgtFinal.write.mode(SaveMode.Overwrite).saveAsTable("tgt_table")
> sqlContext drop the table instead of truncating.
> This is causing error while overwriting.
> Adding stacktrace & commands to reproduce the issue,
> Thanks & Regards,
> Dhaval
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