Struct ReadJson 

pub struct ReadJson;

READ_JSON(path [, json_path]) - Read a whole JSON document and emit one row per object.

Accepts either a JSON array of objects ([{...}, {...}], possibly pretty-printed across many lines) or newline-delimited JSON (JSONL); the format is auto-detected. This is the multi-line counterpart to READ_JSONL, which requires exactly one object per line. Pass - as the path to read from stdin (shares the same cached-once buffer as the other stdin readers).

The optional json_path drills into a nested document to locate the rows before tabularizing — the same dotted/[] syntax as the WEB CTE JSON_PATH clause (see navigate_json_path). This handles the common API shape of an object wrapping the array you want, e.g. TeamCity’s { "projects": { "project": [...] } } via READ_JSON('-', 'projects.project'), or Elasticsearch’s READ_JSON('-', 'hits.hits[]._source'). The path only finds the row set; use a normal SELECT/WHERE to pick columns and filter — anything more (predicates, scalar plucking) is a job for a jq pre-process.

Trait Implementations

impl TableGenerator for ReadJson

fn name(&self) -> &str

Get the name of the generator function (e.g., “GENERATE_PRIMES”)

fn columns(&self) -> Vec<DataColumn>

Get the column definitions for the generated table

fn generate(&self, args: Vec<DataValue>) -> Result<Arc<DataTable>>

Generate the table based on the provided arguments Arguments are evaluated expressions from the SQL query

fn description(&self) -> &str

Get a description of what this generator does

fn arg_count(&self) -> usize

Get the expected number of arguments