danny0405 commented on a change in pull request #9843: [FLINK-14296] [Table
SQL] Use Optional for optional parameters in parser module
URL: https://github.com/apache/flink/pull/9843#discussion_r334222975
##########
File path:
flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/planner/operations/SqlToOperationConverter.java
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@@ -107,29 +106,21 @@ private Operation convertCreateTable(SqlCreateTable
sqlCreateTable) {
}
// set with properties
- SqlNodeList propertyList = sqlCreateTable.getPropertyList();
Map<String, String> properties = new HashMap<>();
- if (propertyList != null) {
- propertyList.getList().forEach(p ->
- properties.put(((SqlTableOption)
p).getKeyString().toLowerCase(),
- ((SqlTableOption) p).getValueString()));
- }
+ sqlCreateTable.getPropertyList().getList().forEach(p ->
+ properties.put(((SqlTableOption)
p).getKeyString().toLowerCase(),
+ ((SqlTableOption) p).getValueString()));
TableSchema tableSchema = createTableSchema(sqlCreateTable);
- String tableComment = "";
- if (sqlCreateTable.getComment() != null) {
- tableComment =
sqlCreateTable.getComment().getNlsString().getValue();
- }
+ String tableComment = sqlCreateTable.getComment().map(comment ->
+ comment.getNlsString().getValue()).orElse("");
Review comment:
Well, i think we should keep it null as the default value.
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