marshal

func Marshal ¶

func Marshal(srcInterface []interface{}, schemaHandler *schema.SchemaHandler) (tb *map[string]*layout.Table, err error)

Convert the objects to table map. srcInterface is a slice of objects

func MarshalArrow ¶

func MarshalArrow(records []interface{}, schemaHandler *schema.SchemaHandler) (*map[string]*layout.Table, error)

MarshalArrow accepts a slice of rows with which it creates a table object. We need to append row by row as opposed to the arrow go provided way of column by column since the wrapper ParquetWriter uses the number of rows to execute intermediate flush depending on the size of the objects, determined by row, which are currently written.

func MarshalCSV ¶

func MarshalCSV(records []interface{}, schemaHandler *schema.SchemaHandler) (*map[string]*layout.Table, error)

Marshal function for CSV like data

func MarshalFast ¶

func MarshalFast(srcInterface []interface{}, schemaHandler *schema.SchemaHandler) (tb *map[string]*layout.Table, err error)

MarshalFast implements the Marshal function while maximizing performance and minimizing allocations.

For each type it attempts to marshal, it uses reflection to compile an encoder. Then, for each element, it looks up the encoder for the type and encodes it by walking the pointers of the structure, appending leaf elements into their respective tables.

This function makes liberal use of the unsafe package to avoid allocations when performing normal reflection. It also uses the "github.com/goccy/go-reflect" package (a drop-in alternative to the normal "reflect" package) to make use of some additional features. (Namely TypeID and TypeAndPtrOf.)

It does not support map-type fields. It should support every other use-case of Marshal.

func MarshalJSON ¶

func MarshalJSON(ss []interface{}, schemaHandler *schema.SchemaHandler) (tb *map[string]*layout.Table, err error)

ss is []string

func Unmarshal ¶

func Unmarshal(tableMap *map[string]*layout.Table, bgn int, end int, dstInterface interface{}, schemaHandler *schema.SchemaHandler, prefixPath string) (err error)

Convert the table map to objects slice. dstInterface is a slice of pointers of objects