如何从Druid摄取规范json文件中获取架构名称/数据库名称？

Question

how can I get Schema name/database name from Druid ingestion spec json file.i have gone through the tutorial but didn't find any regarding schema name or database name.

eg:

"dataSchema" : {
  "dataSource" : "ingestion-tutorial",
  "parser" : {
    "type" : "string",
    "parseSpec" : {
      "format" : "json",
      "timestampSpec" : {
        "format" : "iso",
        "column" : "ts"
      },
      "dimensionsSpec" : {
        "dimensions": [
          "srcIP",
          { "name" : "srcPort", "type" : "long" },
          { "name" : "dstIP", "type" : "string" },
          { "name" : "dstPort", "type" : "long" },
          { "name" : "protocol", "type" : "string" }
        ]
      }
    }
  },
  "granularitySpec" : {
    "rollup" : true
  }
}

for the above ingestion spec we can get the table name from "dataSource" key and column names from "dimensions" key values. but how to get the schema name or database name? i'am new in Druid and I need to write a parsing application which extracts these details from the json file. like database name, table name, and column names.any help would be appreciated.

Answer 1

There is no such concept in Druid as "Database" or "Schema". Apache Druid has only "tables"(Datasources) - https://druid.apache.org/docs/latest/querying/datasource.html and they are not namespaced in any way.