James Walker created ARROW-5314:
-----------------------------------
Summary: [Go] Incorrect Printing for String Arrays with Offsets
Key: ARROW-5314
URL: https://issues.apache.org/jira/browse/ARROW-5314
Project: Apache Arrow
Issue Type: Bug
Components: Go
Reporter: James Walker
If an additional string field is added to the Table Example
([https://github.com/apache/arrow/blob/master/go/arrow/example_test.go#L495-L546)]
the Table Reader outputs unexpected results.
Modified Table example:
{code:java}
pool := memory.NewGoAllocator()
schema := arrow.NewSchema(
[]arrow.Field{
arrow.Field{Name: "f1-i32", Type: arrow.PrimitiveTypes.Int32},
arrow.Field{Name: "f2-f64", Type: arrow.PrimitiveTypes.Float64},
arrow.Field{Name: "string", Type: arrow.BinaryTypes.String},
},
nil,
)
b := array.NewRecordBuilder(pool, schema)
defer b.Release()
b.Field(0).(*array.Int32Builder).AppendValues([]int32{1, 2, 3, 4, 5, 6}, nil)
b.Field(0).(*array.Int32Builder).AppendValues([]int32{7, 8, 9, 10},
[]bool{true, true, false, true})
b.Field(1).(*array.Float64Builder).AppendValues([]float64{1, 2, 3, 4, 5, 6, 7,
8, 9, 10}, nil)
b.Field(2).(*array.StringBuilder).AppendValues([]string{
"one", "two", "three", "four", "five", "six", "seven", "eight", "nine", "ten",
}, nil)
rec1 := b.NewRecord()
defer rec1.Release()
b.Field(0).(*array.Int32Builder).AppendValues([]int32{11, 12, 13, 14, 15, 16,
17, 18, 19, 20}, nil)
b.Field(1).(*array.Float64Builder).AppendValues([]float64{11, 12, 13, 14, 15,
16, 17, 18, 19, 20}, nil)
b.Field(2).(*array.StringBuilder).AppendValues([]string{
"eleven", "twelve", "thirteen", "fourteen", "fifteen", "sixteen", "seventeen",
"eighteen", "nineteen", "twenty",
}, nil)
rec2 := b.NewRecord()
defer rec2.Release()
tbl := array.NewTableFromRecords(schema, []array.Record{rec1, rec2})
defer tbl.Release()
tr := array.NewTableReader(tbl, 2)
defer tr.Release()
n := 0
for tr.Next() {
rec := tr.Record()
for i, col := range rec.Columns() {
fmt.Printf("rec[%d][%q]: %v\n", n, rec.ColumnName(i), col)
}
n++
}
{code}
output:
{code:java}
rec[0]["f1-i32"]: [1 2]
rec[0]["f2-f64"]: [1 2]
rec[0]["string"]: ["one" "two"]
rec[1]["f1-i32"]: [3 4]
rec[1]["f2-f64"]: [3 4]
rec[1]["string"]: ["one" "two"]
rec[2]["f1-i32"]: [5 6]
rec[2]["f2-f64"]: [5 6]
rec[2]["string"]: ["one" "two"]
rec[3]["f1-i32"]: [7 8]
rec[3]["f2-f64"]: [7 8]
rec[3]["string"]: ["one" "two"]
rec[4]["f1-i32"]: [(null) 10]
rec[4]["f2-f64"]: [9 10]
rec[4]["string"]: ["one" "two"]
rec[5]["f1-i32"]: [11 12]
rec[5]["f2-f64"]: [11 12]
rec[5]["string"]: ["eleven" "twelve"]
rec[6]["f1-i32"]: [13 14]
rec[6]["f2-f64"]: [13 14]
rec[6]["string"]: ["eleven" "twelve"]
rec[7]["f1-i32"]: [15 16]
rec[7]["f2-f64"]: [15 16]
rec[7]["string"]: ["eleven" "twelve"]
rec[8]["f1-i32"]: [17 18]
rec[8]["f2-f64"]: [17 18]
rec[8]["string"]: ["eleven" "twelve"]
rec[9]["f1-i32"]: [19 20]
rec[9]["f2-f64"]: [19 20]
rec[9]["string"]: ["eleven" "twelve"]
{code}
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