sealed trait OptimizablePartitionExpression extends AnyRef
Defines rules to convert a data filter to a partition filter for a special generation expression of a partition column.
Note:
- This may be shared cross multiple SparkSessions, implementations should not store any
state (such as expressions) referring to a specific SparkSession.
- Partition columns may have different behaviors than data columns. For example, writing an empty
string to a partition column would become null (SPARK-24438). We need to pay attention to
these slight behavior differences and make sure applying the auto generated partition filters
would still return the same result as if they were not applied.
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def
equalTo(lit: Literal): Option[Expression]
Assume we have a partition column
part, and a data columncol.Assume we have a partition column
part, and a data columncol. Return a partition filter based onpartfor a data filtercol = lit. -
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def
greaterThan(lit: Literal): Option[Expression]
Assume we have a partition column
part, and a data columncol.Assume we have a partition column
part, and a data columncol. Return a partition filter based onpartfor a data filtercol > lit. -
def
greaterThanOrEqual(lit: Literal): Option[Expression]
Assume we have a partition column
part, and a data columncol.Assume we have a partition column
part, and a data columncol. Return a partition filter based onpartfor a data filtercol >= lit. -
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def
isNull(): Option[Expression]
Assume we have a partition column
part, and a data columncol.Assume we have a partition column
part, and a data columncol. Return a partition filter based onpartfor a data filtercol IS NULL. -
def
lessThan(lit: Literal): Option[Expression]
Assume we have a partition column
part, and a data columncol.Assume we have a partition column
part, and a data columncol. Return a partition filter based onpartfor a data filtercol < lit. -
def
lessThanOrEqual(lit: Literal): Option[Expression]
Assume we have a partition column
part, and a data columncol.Assume we have a partition column
part, and a data columncol. Return a partition filter based onpartfor a data filtercol <= lit. -
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