NEW Macros

[lmangani]

JSON Macros

• JSONExtract: Extracts a value based on a specified key and converts it to the given type.
• JSONExtractRaw: Retrieves a value as a raw JSON string without type conversion.
• JSONHas: Checks if a specified key exists within a JSON object by verifying if the extracted value is not null.
• JSONLength: Returns the number of elements in a JSON array.
• JSONType: Expands a JSON object into a set of key-value pairs.
• JSONExtractKeys: Retrieves the keys of a JSON object as an array.
• JSONExtractValues: Extracts values from a JSON object, returning them as text.

Comparison Macros

• equals: Checks if a is equal to b.
• notEquals: Checks if a is not equal to b.
• less: Checks if a is less than b.
• greater: Checks if a is greater than b.
• lessOrEquals: Checks if a is less than or equal to b.
• greaterOrEquals: Checks if a is greater than or equal to b.

Scan Macro

• ch_scan HTTP client helper extended to support multiple formats

D SELECT * FROM ch_scan("SELECT number * 100 FROM numbers(3)","https://play.clickhouse.com", format := "JSON");
┌───────────────────────┐
│ multiply(number, 100) │
│        varchar        │
├───────────────────────┤
│ 0                     │
│ 100                   │
│ 200                   │
└───────────────────────┘
D SELECT * FROM ch_scan("SELECT number * 100 FROM numbers(3)","https://play.clickhouse.com", format := "Parquet");
┌───────────────────────┐
│ multiply(number, 100) │
│        uint64         │
├───────────────────────┤
│                     0 │
│                   100 │
│                   200 │
└───────────────────────┘