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[SPARK-6037][SQL] Avoiding duplicate Parquet schema merging #4786

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[SPARK-6037][SQL] Avoiding duplicate Parquet schema merging #4786

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23 changes: 7 additions & 16 deletions sql/core/src/main/scala/org/apache/spark/sql/parquet/ParquetTableOperations.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -467,22 +467,13 @@ private[parquet] class FilteringParquetRowInputFormat
return splits
}

Option(globalMetaData.getKeyValueMetaData.get(RowReadSupport.SPARK_METADATA_KEY)).foreach {
schemas =>
val mergedSchema = schemas
.map(DataType.fromJson(_).asInstanceOf[StructType])
.reduce(_ merge _)
.json

val mergedMetadata = globalMetaData
.getKeyValueMetaData
.updated(RowReadSupport.SPARK_METADATA_KEY, setAsJavaSet(Set(mergedSchema)))

globalMetaData = new GlobalMetaData(
globalMetaData.getSchema,
mergedMetadata,
globalMetaData.getCreatedBy)
}
val metadata = configuration.get(RowWriteSupport.SPARK_ROW_SCHEMA)
val mergedMetadata = globalMetaData
.getKeyValueMetaData
.updated(RowReadSupport.SPARK_METADATA_KEY, setAsJavaSet(Set(metadata)))

globalMetaData = new GlobalMetaData(globalMetaData.getSchema,
mergedMetadata, globalMetaData.getCreatedBy)

val readContext = getReadSupport(configuration).init(
new InitContext(configuration,
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