Bigquery json query full#
Bigquery json query plus#

Importing a bunch of largish files (20x50k rows)Īnd to simulate a more real-life example I created a few different data types for the columns to see how they are handled by BigQuery.AVRO - a binary format that GCP recommends for fast load times.įor each of the formats above, I ran 3 experiments: Now BigQuery supports JSONEXTRACTARRAY(): For example, to solve this particular question: SELECT id, ARRAY( SELECT JSONEXTRACTSCALAR(x, '.author.email') FROM UNNEST(JSONEXTRACTARRAY(payload, '. In order to use Service Account Key authentication, first, you need to generate a JSON file via Google Cloud Console using official documentation or interactive.By default, BigQuery writes all query results. PARQUET - a columnar storage format with snappy compression that’s natively supported by pandas. When you configure the origin, you define the query to run using valid BigQuery standard SQL or legacy SQL syntax.

Function overview Standard JSON extraction functions (recommended) The following functions.

CSV.GZIP - same as above, but compressed with GZIP. GoogleSQL for BigQuery supports the following functions, which can retrieve and transform JSON data.

CSV - comma-separated files with no compression at all.

I rarely ever use OCR and I mostly use Python for my work, which means I have a bunch of pandas at my disposal that can easily write CSV and PARQUET files with compression, so the list of file types I decided to test are: BigQuery has a lot of options and capabilities, with its handful of built-in methods at our disposal. GCP recommends AVRO for fast ingestion times due to the way it compresses data, but who believes documentation these days? I want to see for myself which file format will come out on top. Advanced BigQuery queries with JavaScript and JSON.

Bigquery json query plus#

On the plus side, it makes it possible for BigQuery to ingest and preserve raw JSON objects, without (as with at least one competitive implementation) shredding data out of them and discarding them.

Bigquery json query full#

Let’s hope our files will load quicker than it took to capture this picture… - Photo by Anders Jildén on Unsplashįor full access to all Medium articles - including mine - consider subscribing here. In theory, BigQuery’s implementation of a JSON data type addresses this issue.