chucheng92 commented on code in PR #22179:
URL: https://github.com/apache/flink/pull/22179#discussion_r1139986468
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flink-table/flink-table-api-java/src/main/java/org/apache/flink/table/operations/ShowCatalogsOperation.java:
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@@ -19,10 +19,27 @@
package org.apache.flink.table.operations;
/** Operation to describe a SHOW CATALOGS statement. */
-public class ShowCatalogsOperation implements ShowOperation {
+public class ShowCatalogsOperation extends SupportsShowLikeOperation {
+
+ public ShowCatalogsOperation() {
Review Comment:
@Aitozi thanks for reviewing, default constructor is using without like.
considering ShowSqlNode & ShowOperation both apply in flink-parser and
hive-parser. we must let a default constructor. because many hive show syntax
not support sub-clauses. So it need a default constructor.
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