jasonstack commented on a change in pull request #735:
URL: https://github.com/apache/cassandra/pull/735#discussion_r698405133
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File path: src/java/org/apache/cassandra/index/Index.java
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@@ -364,6 +382,23 @@ default SSTableFlushObserver getFlushObserver(Descriptor
descriptor, OperationTy
*/
public AbstractType<?> customExpressionValueType();
+ /**
+ * If the index supports custom search expressions using the
+ * {@code SELECT * FROM table WHERE expr(index_name, expression)} syntax,
this method should return a new
+ * {@link RowFilter.CustomExpression} for the specified expression value.
Index implementations may provide their
+ * own implementations using method {@link
RowFilter.CustomExpression#isSatisfiedBy(TableMetadata, DecoratedKey, Row)}
+ * to filter reconciled rows in the coordinator. Otherwise, the default
implementation will accept all rows.
+ * See DB-2185 and DSP-16537 for further details.
+ *
+ * @param metadata the indexed table metadata
+ * @param value the custom expression value
+ * @return a custom index expression for the specified value
+ */
+ default RowFilter.CustomExpression customExpressionFor(TableMetadata
metadata, ByteBuffer value)
Review comment:
removed
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