wuchong commented on a change in pull request #10536: [FLINK-15191][connectors
/ kafka]Fix can't create table source for Kafka if watermark or computed column
is defined.
URL: https://github.com/apache/flink/pull/10536#discussion_r357501589
##########
File path:
flink-table/flink-table-api-java-bridge/src/main/java/org/apache/flink/table/descriptors/SchemaValidator.java
##########
@@ -118,6 +131,36 @@ else if (proctimeFound) {
properties.validateExclusion(proctime);
}
}
+
+ validateWatermark(properties);
+ }
+
+ /**
+ * Validate watermarks if exists.
+ */
+ private void validateWatermark(DescriptorProperties properties) {
+ final String schemaWatermarkKey = SCHEMA + "." + WATERMARK;
+ int watermarkRowtimeKeys =
properties.getIndexedProperty(schemaWatermarkKey, WATERMARK_ROWTIME).size();
+ int watermarkStrategyKeys =
properties.getIndexedProperty(schemaWatermarkKey,
WATERMARK_STRATEGY_EXPR).size();
+ int watermarkStrategyDataTypeKeys =
properties.getIndexedProperty(schemaWatermarkKey,
WATERMARK_STRATEGY_DATA_TYPE).size();
+
+ if (watermarkRowtimeKeys > 0 || watermarkStrategyKeys > 0 ||
watermarkStrategyDataTypeKeys > 0) {
+ if (!isStreamEnvironment) {
+ throw new ValidationException(
+ format("Property '%s' is not allowed in
a batch environment.", schemaWatermarkKey));
Review comment:
Please remove this limitation. DDL (or descriptor) should be unified, which
means the same DDL can both work in batch and streaming mode. The differences
is that watermark information will be ignored in batch mode.
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