maven – Failed to execute goal generate – desired archetype does not exist (org:flink-walkthrough-datastream-java)

I am trying to follow the official tutorial for Fraud Detection with the DataStream API. After installing the prerequisites, I execute the following command: $ mvn archetype:generate -DarchetypeGroupId=org.apache.flink -DarchetypeArtifactId=flink-walkthrough-datastream-java -DarchetypeVersion=1.15.0 -DgroupId=frauddetection -DartifactId=frauddetection -Dversion=0.1 -Dpackage=spendreport -DinteractiveMode=false I encounter the following error: C:Usersbk73027ProjectsFlinkDemoflink-1.15.0> mvn archetype:generate -DarchetypeGroupId=org.apache.flink -DarchetypeArtifactId=flink-walkthrough-datastream-java -DarchetypeVersion=1.15.0 -DgroupId=frauddetection -DartifactId=frauddetection -Dversion=0.1 -Dpackage=spendreport -DinteractiveMode=false [INFO] Scanning for projects… … Read more

java – Post mapping doesn’t work (message): “could not execute statement)

I am trying to create simple Rest project. When Post request is generated there is an error: HTTP/1.1 500 Content-Type: application/json Transfer-Encoding: chunked Date: Sun, 19 Jun 2022 14:33:09 GMT Connection: close { “timestamp”: “2022-06-19T14:33:09.368+00:00”, “status”: 500, “error”: “Internal Server Error”, “trace”: “org.springframework.dao.DataIntegrityViolationException: could not execute statement; SQL [n/a]; constraint [null]; nested exception is org.hibernate.exception.ConstraintViolationException: … Read more

python – How do I execute a program or call a system command?

How to execute a program or call a system command from Python Simple, use subprocess.runwhich returns a CompletedProcess object: >>> from subprocess import run >>> from shlex import split >>> completed_process = run(split(‘python –version’)) Python 3.8.8 >>> completed_process CompletedProcess(args=[‘python’, ‘–version’], returncode=0) (run wants a list of lexically parsed shell arguments – this is what you’d … Read more

How Does the Database Understand and Execute Your Query?

A vector query in Milvus is the process of retrieving vectors via scalar filtering based on a boolean expression. With scalar filtering, users can limit their query results with certain conditions applied to data attributes. For instance, if a user queries for films released during 1990-2010 and scores higher than 8.5, only films whose attributes … Read more

sql – I need to optimize the following pgsql select statement – its currently taking 34 avg seconds to execute

I have a view that shows all relations. I use the following select for the view: CREATE VIEW relationships AS SELECT DISTINCT, AS table_id, relations.related_table AS related_table, AS related_id, relations.foreign_column AS foreign_column_name, relations.local_column AS local_column_name, count(DISTINCT AS relationships, count(DISTINCT relations.referenced_tables) AS foreign_keys_count, count(DISTINCT relations.referencing_tables) AS references_count, count(DISTINCT related_table) AS related_tables_count, count(DISTINCT … Read more