xuefuz commented on a change in pull request #10381: [FLINK-14513][hive]
Implement listPartitionsByFilter to HiveCatalog
URL: https://github.com/apache/flink/pull/10381#discussion_r355161669
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File path:
flink-connectors/flink-connector-hive/src/main/java/org/apache/flink/table/catalog/hive/util/HiveTableUtil.java
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@@ -175,4 +186,93 @@ public static boolean requireRelyConstraint(byte trait) {
return (trait & HIVE_CONSTRAINT_RELY) != 0;
}
+ /**
+ * Generates a filter string for partition columns from the given
filter expressions.
+ *
+ * @param numNonPartCol The number of non-partition columns -- used to
shift field reference index
+ * @param partColNames The names of all partition columns
+ * @param expressions The filter expressions in CNF form
+ * @return an Optional filter string equivalent to the expressions,
which is empty if the expressions can't be handled
+ */
+ public static Optional<String> makePartitionFilter(int numNonPartCol,
List<String> partColNames, List<Expression> expressions) {
Review comment:
Nit: what about rename numNonPartCol to partColOffset?
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