A BigQuery table has schema which can be viewed in the web UI, updated, or used to load data with the bq
tool as a JSON file. However, I can't find a way to dump this schema from an existing table to a JSON file (preferably from the command-line). Is that possible?
BigQuery table具有模式,可以在web UI中查看、更新或使用bq工具作为JSON文件加载数据。但是,我无法找到将这个模式从现有表转储到JSON文件(最好是从命令行)的方法。这有可能吗?
2 个解决方案
#1
28
a way to dump schema from an existing table to a JSON file (preferably from the command-line). Is that possible?
将模式从现有表转储到JSON文件(最好是从命令行)的一种方法。这有可能吗?
try below
试试下面的
bq show bigquery-public-data:samples.wikipedia
You can use –format flag to prettify output
您可以使用-format标志来美化输出。
--format: none|json|prettyjson|csv|sparse|pretty:
——格式:没有一个json | | prettyjson csv稀疏| | |漂亮:
Format for command output. Options include:
命令输出的格式。选项包括:
none: ...
pretty: formatted table output
sparse: simpler table output
prettyjson: easy-to-read JSON format
json: maximally compact JSON
csv: csv format with header
The first three are intended to be human-readable, and the latter three are for passing to another program. If no format is selected, one will be chosen based on the command run.
前三个目标是人类可读的,后三个目标是传递给另一个程序。如果没有选择格式,将根据命令运行选择一个格式。
Realized I provided partial answer :o)
意识到我提供了部分答案:o)
Below does what PO wanted
下面是PO想要的
bq show --format=prettyjson bigquery-public-data:samples.wikipedia | jq '.schema.fields'
#2
2
You can add the flag --schema
[1] in order to avoid table data information.
您可以添加标志——模式[1],以避免表数据信息。
bq show --schema --format=prettyjson [PROJECT_ID]:[DATASET].[TABLE] > [SCHEMA_FILE]
bq show --schema --format=prettyjson mydataset.mytable > /tmp/myschema.json
[1] https://cloud.google.com/bigquery/docs/managing-table-schemas
[1]https://cloud.google.com/bigquery/docs/managing-table-schemas
#1
28
a way to dump schema from an existing table to a JSON file (preferably from the command-line). Is that possible?
将模式从现有表转储到JSON文件(最好是从命令行)的一种方法。这有可能吗?
try below
试试下面的
bq show bigquery-public-data:samples.wikipedia
You can use –format flag to prettify output
您可以使用-format标志来美化输出。
--format: none|json|prettyjson|csv|sparse|pretty:
——格式:没有一个json | | prettyjson csv稀疏| | |漂亮:
Format for command output. Options include:
命令输出的格式。选项包括:
none: ...
pretty: formatted table output
sparse: simpler table output
prettyjson: easy-to-read JSON format
json: maximally compact JSON
csv: csv format with header
The first three are intended to be human-readable, and the latter three are for passing to another program. If no format is selected, one will be chosen based on the command run.
前三个目标是人类可读的,后三个目标是传递给另一个程序。如果没有选择格式,将根据命令运行选择一个格式。
Realized I provided partial answer :o)
意识到我提供了部分答案:o)
Below does what PO wanted
下面是PO想要的
bq show --format=prettyjson bigquery-public-data:samples.wikipedia | jq '.schema.fields'
#2
2
You can add the flag --schema
[1] in order to avoid table data information.
您可以添加标志——模式[1],以避免表数据信息。
bq show --schema --format=prettyjson [PROJECT_ID]:[DATASET].[TABLE] > [SCHEMA_FILE]
bq show --schema --format=prettyjson mydataset.mytable > /tmp/myschema.json
[1] https://cloud.google.com/bigquery/docs/managing-table-schemas
[1]https://cloud.google.com/bigquery/docs/managing-table-schemas