tibrewalpratik17 commented on code in PR #13103:
URL: https://github.com/apache/pinot/pull/13103#discussion_r1622004889
##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/recordtransformer/SanitizationTransformer.java:
##########
@@ -32,51 +34,197 @@
* <ul>
* <li>No {@code null} characters in string values</li>
* <li>String values are within the length limit</li>
- * TODO: add length limit to BYTES values if necessary
* </ul>
* <p>NOTE: should put this after the {@link DataTypeTransformer} so that all
values follow the data types in
* {@link FieldSpec}.
+ * This uses the MaxLengthExceedStrategy in the {@link FieldSpec} to decide
what to do when the value exceeds the max.
+ * For TRIM_LENGTH, the value is trimmed to the max length.
+ * For SUBSTITUTE_DEFAULT_VALUE, the value is replaced with the default null
value string.
+ * For ERROR, an exception is thrown and the record is skipped.
+ * For NO_ACTION, the value is kept as is if no NULL_CHARACTER present else
trimmed till NULL.
+ * In the first 2 scenarios, this metric INCOMPLETE_REALTIME_ROWS_CONSUMED can
be tracked to know if a trimmed /
+ * default record was persisted.
+ * In the third scenario, this metric ROWS_WITH_ERRORS can be tracked to know
if a record was skipped.
+ * In the last scenario, this metric INCOMPLETE_REALTIME_ROWS_CONSUMED can be
tracked to know if a record was trimmed
+ * due to having a null character.
*/
public class SanitizationTransformer implements RecordTransformer {
- private final Map<String, Integer> _stringColumnMaxLengthMap = new
HashMap<>();
+ private static final String NULL_CHARACTER = "\0";
+ private final Map<String, SanitizedColumnInfo> _columnToColumnInfoMap = new
HashMap<>();
public SanitizationTransformer(Schema schema) {
+ FieldSpec.MaxLengthExceedStrategy maxLengthExceedStrategy;
for (FieldSpec fieldSpec : schema.getAllFieldSpecs()) {
- if (!fieldSpec.isVirtualColumn() && fieldSpec.getDataType() ==
DataType.STRING) {
- _stringColumnMaxLengthMap.put(fieldSpec.getName(),
fieldSpec.getMaxLength());
+ if (!fieldSpec.isVirtualColumn()) {
+ switch (fieldSpec.getDataType()) {
+ case STRING:
+ maxLengthExceedStrategy = fieldSpec.getMaxLengthExceedStrategy()
== null
+ ? FieldSpec.MaxLengthExceedStrategy.TRIM_LENGTH :
fieldSpec.getMaxLengthExceedStrategy();
+ _columnToColumnInfoMap.put(fieldSpec.getName(), new
SanitizedColumnInfo(fieldSpec.getName(),
+ fieldSpec.getMaxLength(), maxLengthExceedStrategy,
fieldSpec.getDefaultNullValueString()));
+ break;
+ case JSON:
+ case BYTES:
+ maxLengthExceedStrategy = fieldSpec.getMaxLengthExceedStrategy()
== null
+ ? FieldSpec.MaxLengthExceedStrategy.NO_ACTION :
fieldSpec.getMaxLengthExceedStrategy();
+ _columnToColumnInfoMap.put(fieldSpec.getName(), new
SanitizedColumnInfo(fieldSpec.getName(),
Review Comment:
In case of string do we want to ingest `NULL_CHARACTER` in case of
`NO_ACTION` ?
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