AlwaysZhi opened a new issue, #45:
URL: https://github.com/apache/arrow-go/issues/45
### Describe the usage question you have. Please include as many useful
details as possible.
When I attempt to use the array.RecordFromJSON() method to read a relatively
large JSON file (approximately 200MB in size), Ithe method does not return for
a significant amount of time. It seems to be either blocked indefinitely or
possibly stuck in an ongoing data processing loop. I am currently unable to
determine whether this is a bug or how to successfully utilize the method to
achieve my objective.
Here is my code:
func readJsonFile() {
schema := arrow.NewSchema([]arrow.Field{
{Name: "instruction", Type: arrow.BinaryTypes.String, Nullable:
true},
{Name: "input", Type: arrow.BinaryTypes.String, Nullable: true},
{Name: "output", Type: arrow.BinaryTypes.String, Nullable:
true},
}, nil)
jsonFile, err := os.Open("/home/data/mydata.json")
if err != nil {
fmt.Println("open json file:", err)
return
}
defer jsonFile.Close()
mem := memory.NewCheckedAllocator(memory.DefaultAllocator)
rec, _, err := array.RecordFromJSON(mem, schema, jsonFile)
fmt.Printf("record number is： %d", rec.NumRows())
fmt.Println("field name 0 -", rec.Schema().Field(0).Name)
fmt.Println("field name 1 -", rec.Schema().Field(1).Name)
fmt.Println("field name 2 -", rec.Schema().Field(2).Name)
}
My json file format looks like this:
[{"instruction":"a", "input":"b", "output","o1"}, {"instruction":"c",
"input":"d", "output","o2"}, ...]
### Component(s)
Go
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