org.apache.spark.sql.execution.columnar.encoding
NullableDecoder
Related Doc:
package encoding
Used by some decoders to track the current sequential cursor.
Used by some decoders to track the current sequential cursor.
Fetch next null position and return it as returned by getNextNullPosition.
Fetch next null position and return it as returned by getNextNullPosition.
Return the next position of a null value.
Return the next position of a null value.
Absolute position null check for random access.
Absolute position null check for random access.
Not used by decoders themselves but by delta writer that stores the current nonNullPosition for the decoder.
Not used by decoders themselves but by delta writer that stores the current nonNullPosition for the decoder. Initialized to -1 so that first increment starts at 0.
Return the number of nulls till given ordinal given previous result.
Return the number of nulls till given ordinal given previous result.
Nulls are stored either as a bitset or as a sequence of positions (or inverse sequence of missing positions) if the number of nulls is small (or non-nulls is small). This is indicated by the count field which is negative for the latter case. The decoder for latter keeps track of next null position and compares against that.