/orc

An ORC file format reader and writer for Go.

Primary LanguageGoMIT LicenseMIT

orc

Build Status code-coverage go-doc

Project Status

This project is still a work in progress.

Current Support

Column Encoding Read Write Go Type
SmallInt, Int, BigInt ✓ int64
Float, Double ✓ float32, float64
String, Char, and VarChar ✓ string
Boolean ✓ bool
TinyInt ✓ byte
Binary ✓ []byte
Decimal ✓ orc.Decimal
Date ✓ orc.Date (time.Time)
Timestamp ✓ time.Time
Struct ✓ orc.Struct (map[string]interface{})
List ✓ []interface{}
Map ✓ []orc.MapEntry
Union ✓ interface{}
  • The writer support is in its late stages, however, I do not recommend using it yet.

Example

r, err := Open("./examples/demo-12-zlib.orc")
if err != nil {
    log.Fatal(err)
}
defer r.Close()

// Create a new Cursor reading the provided columns.
c := r.Select("_col0", "_col1", "_col2")

// Iterate over each stripe in the file.
for c.Stripes() {
    
    // Iterate over each row in the stripe.
    for c.Next() {
          
        // Retrieve a slice of interface values for the current row.
        log.Println(c.Row())
        
    }
   
}

if err := c.Err(); err != nil {
    log.Fatal(err)
}