.flat_map(split, Types.TUPLE([Types.INT(), Types.STRING()])) \ .key_by(lambda i: i[1]) \ .reduce(lambda i, j: (i[0] + j[0], i[1])) #将ds写出到sink t_env.execute_sql(""" CREATE TABLE my_sink ( a INT, b VARCHAR ) WITH ( 'connector' = 'print' ) """) table...
The Table API examples define source/sink properties as key/value pairs. All Table API connectors follow that pattern To use a different connector, or to define a new connector that is not officially supported in PyFlink, just configure appropriate key/value pairs. The DataStream API connectors ...
对于 Flink 也是如此,图中的 source、map、filter 算子都是窄依赖的,每个分区操作都是独立的。但像 keyBy 这种宽依赖的算子则不同,因为 keyBy 是按 key 聚合,而不同分区可能会包含具有相同 key 的数据,因此就会涉及数据的传输,此时我们也说产生了 Shuffle。 而对于这些窄依赖的算子,完全可以将它们合并在一起,由...
pv bigint, PRIMARY KEY(rownum,start_time,city) )with( type='rds', ... ) INSERT INTO rds_output SELECT rownum,start_time,city,keyword,pv FROM( SELECT*, ROW_NUMBER()OVER(PARTITION BY start_time,city ORDER BY pv desc)AS rownum FROM( selectsubstr(time_str,1,12)asstart_time, keyword,...
[db_name.]table_name ( { <column_definition> | <computed_column_definition> }[ , ...n] [ <watermark_definition> ] [ ][ , ...n] ) [COMMENT table_comment] [PARTITIONED BY (partition_column_name1, partition_column_name2, ...)] WITH (key1=val1, key2=val2, ...) [ LIKE ...
@udaf(result_type=DataTypes.ROW([DataTypes.FIELD("count",DataTypes.BIGINT())]),func_type="pandas")defexam_count(pandas_df:pd.DataFrame):returnRow(pandas_df.count())tab_class_exam_count=tab_source.group_by(col('class'))\.aggregate(exam_count(col('class')).alias("count"))\.select(col...
.group_by("ticker, one_minute_window") .select("ticker, price.avg as price, one_minute_window.end as event_time") ) return tumbling_window_table def main(): # KDA 应用程序属性键 input_property_group_key = "consumer.config.0"
After that, we looked at the PyFlink roadmap and previewed the key points of PyFlink in Flink 1.11. It is expected that the performance of PyFlink 1.11 will be improved by more than 15-fold over PyFlink 1.10. Finally, we analyzed PyFlink's mission: making PyFlink available to Python ...
By company size Enterprises Small and medium teams Startups By use case DevSecOps DevOps CI/CD View all use cases By industry Healthcare Financial services Manufacturing Government View all industries View all solutions Resources Topics AI DevOps Security Software...
Abstract: This article is compiled from the speech delivered by Alibaba senior development engineer Huang Xingbo (Duanchen) in the core technology ...