如何在Java中获取bigquery表架构

Question

lets say I have this myTable table in BQ:

[
  {"name": "executionId", "type": "STRING"},
  {"name":"metadata", "type":"record","fields":[
    {"name":"fileName", "type":"STRING"},
    {"name":"fileType", "type":"STRING"},
    {"name":"errors", "type":"STRING"}
  ]}
]

now I'm trying to get the tables schema in my code. here is what I tried using this example :

import com.google.cloud.examples.bigquery.snippets.*;

public class MyClass {
    public static void main(String[] args) throws Exception {
        BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
        BigQuerySnippets bigQuerySnippets = new BigQuerySnippets(bigquery);
        Table table = bigQuerySnippets.getTable("MY_DATASET", "myTable");

now how do I continue? does table have a method for this?

Answer 1

Table扩展了TableInfo ，因此您可以从TableInfo获取TableDefinition ，并从TableDefinition获得Schema ：

Schema schema = table.getDefinition().getSchema();