我是stackoverflow的新手,所以让我知道如果我在这里发布这些问题我有什么不对。
我已经尝试找到答案,但无法在网站上找到KSQL JOIN相关问题,所以我发布了这个。我已经尝试了不同的方法来运行此查询,但我一直得到空指针异常,所以在此处发布。
我有2个kafka avro主题交易&费用,但数据有很多空白,以清楚我已创建以下主题和表与修剪数据。 const exampleInfo: GithubInfo = {
name: "Hello",
login: "Hello1",
description: "TypeScript dev",
repos: [{ project: "ts", star: 5 }, { project: "js", star: 5 }]
};
const repos = from(gitHubInfo["repos"]);
const reposeDetial = repos.pipe(
map(val => `${val.project},${val.star}`))
.subscribe(val => {
console.log(val); // emit `ts,5` ,`js,5` instead in single block `ts,5,js,5`
});
和DEAL_STREAM
EXPENSE_TABLE
结果:
ksql> describe EXPENSE_TABLE;
和
Field | Type
ROWTIME | BIGINT (system)
ROWKEY | VARCHAR(STRING) (system)
KSQL_COL_0 | VARCHAR(STRING)
KSQL_COL_1 | VARCHAR(STRING)
KSQL_COL_2 | VARCHAR(STRING)
结果:
ksql> describe deal_stream;
当我执行以下Query时,它给出了空指针异常。 我尝试了以下查询。
1:
Field | Type
ROWTIME | BIGINT (system)
ROWKEY | VARCHAR(STRING) (system)
KSQL_COL_0 | VARCHAR(STRING)
KSQL_COL_1 | VARCHAR(STRING)
KSQL_COL_2 | VARCHAR(STRING)
2:
ksql> CREATE STREAM deal_expense_new AS SELECT td.KSQL_COL_0 , te.KSQL_COL_1 FROM deal_stream td LEFT JOIN expense_table te ON td.KSQL_COL_0 = te.KSQL_COL_0;
3:
ksql> CREATE STREAM deal_expense_new AS SELECT td.KSQL_COL_0 AS KSQL_COL_0 , te.KSQL_COL_1 FROM deal_stream td LEFT JOIN expense_table te ON td.KSQL_COL_0 = te.KSQL_COL_0;
错误:
CREATE STREAM deal_expense_trimmed AS SELECT td.KSQL_COL_0 AS KSQL_COL_0 , te.KSQL_COL_1 FROM deal_stream td LEFT JOIN expense_table te ON td.KSQL_COL_0 = te.KSQL_COL_0 where td.KSQL_COL_0 IS NOT NULL;
答案 0 :(得分:6)
这个bug应该在最新的master中修复。该修复程序将包含在下一个月度发行版中。这是github问题:https://github.com/confluentinc/ksql/issues/521