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[SPARK-25579][SQL] Use quoted attribute names if needed in pushed ORC predicates #22597

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[SPARK-25579][SQL] Use quoted attribute names if needed in pushed ORC predicates #22597

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[SPARK-25579][SQL] Use quoted attribute names if needed in pushed ORC…
dongjoon-hyun Oct 1, 2018
335a39f
Add a test case.
dongjoon-hyun Oct 13, 2018
849c7fa
Add withSQLConf with ORC_FILTER_PUSHDOWN_ENABLED=true
dongjoon-hyun Oct 14, 2018
7686179
Address comments
dongjoon-hyun Oct 16, 2018
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37 changes: 28 additions & 9 deletions sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/orc/OrcFilters.scala
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,16 @@ private[sql] object OrcFilters {
}
}

// Since ORC 1.5.0 (ORC-323), we need to quote for column names with `.` characters
// in order to distinguish predicate pushdown for nested columns.
private def quoteAttributeNameIfNeeded(name: String) : String = {
if (!name.contains("`") && name.contains(".")) {
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@HyukjinKwon HyukjinKwon Oct 1, 2018

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Does this condition take the backtick in column name into account? For instance,

>>> spark.range(1).toDF("abc`.abc").show()
+--------+
|abc`.abc|
+--------+
|       0|
+--------+

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@dongjoon-hyun dongjoon-hyun Oct 1, 2018

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Thank you for review. I'll consider that, too.

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@dongjoon-hyun dongjoon-hyun Oct 13, 2018

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@HyukjinKwon . Actually, Spark 2.3.2 ORC (native/hive) doesn't support a backtick character in column names. It fails on writing operation. And, although Spark 2.4.0 broadens the supported special characters like . and " in column names, the backtick character is not handled yet.

So, for that one, I'll proceed in another PR since it's an improvement instead of a regression.

Also, cc @gatorsmile and @dbtsai .

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@dongjoon-hyun dongjoon-hyun Oct 13, 2018

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For ORC and AVRO improvement, SPARK-25722 is created.

s"`$name`"
} else {
name
}
}

/**
* Create ORC filter as a SearchArgument instance.
*/
Expand Down Expand Up @@ -178,38 +188,47 @@ private[sql] object OrcFilters {
// wrapped by a "parent" predicate (`And`, `Or`, or `Not`).

case EqualTo(attribute, value) if isSearchableType(dataTypeMap(attribute)) =>
val quotedName = quoteAttributeNameIfNeeded(attribute)
val castedValue = castLiteralValue(value, dataTypeMap(attribute))
Some(builder.startAnd().equals(attribute, getType(attribute), castedValue).end())
Some(builder.startAnd().equals(quotedName, getType(attribute), castedValue).end())

case EqualNullSafe(attribute, value) if isSearchableType(dataTypeMap(attribute)) =>
val quotedName = quoteAttributeNameIfNeeded(attribute)
val castedValue = castLiteralValue(value, dataTypeMap(attribute))
Some(builder.startAnd().nullSafeEquals(attribute, getType(attribute), castedValue).end())
Some(builder.startAnd().nullSafeEquals(quotedName, getType(attribute), castedValue).end())

case LessThan(attribute, value) if isSearchableType(dataTypeMap(attribute)) =>
val quotedName = quoteAttributeNameIfNeeded(attribute)
val castedValue = castLiteralValue(value, dataTypeMap(attribute))
Some(builder.startAnd().lessThan(attribute, getType(attribute), castedValue).end())
Some(builder.startAnd().lessThan(quotedName, getType(attribute), castedValue).end())

case LessThanOrEqual(attribute, value) if isSearchableType(dataTypeMap(attribute)) =>
val quotedName = quoteAttributeNameIfNeeded(attribute)
val castedValue = castLiteralValue(value, dataTypeMap(attribute))
Some(builder.startAnd().lessThanEquals(attribute, getType(attribute), castedValue).end())
Some(builder.startAnd().lessThanEquals(quotedName, getType(attribute), castedValue).end())

case GreaterThan(attribute, value) if isSearchableType(dataTypeMap(attribute)) =>
val quotedName = quoteAttributeNameIfNeeded(attribute)
val castedValue = castLiteralValue(value, dataTypeMap(attribute))
Some(builder.startNot().lessThanEquals(attribute, getType(attribute), castedValue).end())
Some(builder.startNot().lessThanEquals(quotedName, getType(attribute), castedValue).end())

case GreaterThanOrEqual(attribute, value) if isSearchableType(dataTypeMap(attribute)) =>
val quotedName = quoteAttributeNameIfNeeded(attribute)
val castedValue = castLiteralValue(value, dataTypeMap(attribute))
Some(builder.startNot().lessThan(attribute, getType(attribute), castedValue).end())
Some(builder.startNot().lessThan(quotedName, getType(attribute), castedValue).end())

case IsNull(attribute) if isSearchableType(dataTypeMap(attribute)) =>
Some(builder.startAnd().isNull(attribute, getType(attribute)).end())
val quotedName = quoteAttributeNameIfNeeded(attribute)
Some(builder.startAnd().isNull(quotedName, getType(attribute)).end())

case IsNotNull(attribute) if isSearchableType(dataTypeMap(attribute)) =>
Some(builder.startNot().isNull(attribute, getType(attribute)).end())
val quotedName = quoteAttributeNameIfNeeded(attribute)
Some(builder.startNot().isNull(quotedName, getType(attribute)).end())

case In(attribute, values) if isSearchableType(dataTypeMap(attribute)) =>
val quotedName = quoteAttributeNameIfNeeded(attribute)
val castedValues = values.map(v => castLiteralValue(v, dataTypeMap(attribute)))
Some(builder.startAnd().in(attribute, getType(attribute),
Some(builder.startAnd().in(quotedName, getType(attribute),
castedValues.map(_.asInstanceOf[AnyRef]): _*).end())

case _ => None
Expand Down