Sunyue commented on issue #404:
URL: https://github.com/apache/arrow-go/issues/404#issuecomment-2982552941
I created a test case like below, thanks again for your help!
```go
import (
"testing"
"github.com/apache/arrow-go/v18/arrow"
"github.com/apache/arrow-go/v18/arrow/array"
"github.com/apache/arrow-go/v18/arrow/compute"
"github.com/apache/arrow-go/v18/arrow/compute/exprs"
"github.com/apache/arrow-go/v18/arrow/decimal"
"github.com/apache/arrow-go/v18/arrow/memory"
"github.com/stretchr/testify/require"
"github.com/substrait-io/substrait-go/v3/expr"
"github.com/substrait-io/substrait-go/v3/types"
)
func Test_Types(t *testing.T) {
t.Parallel()
tt := []struct {
name string
schema func() *arrow.Schema
record func(rq *require.Assertions, schema *arrow.Schema)
arrow.Record
val func(rq *require.Assertions) expr.Literal
}{
{
name: "expect arrow.TIME64 (ns) ok",
schema: func() *arrow.Schema {
field := arrow.Field{
Name: "col",
Type: &arrow.Time64Type{Unit:
arrow.Nanosecond},
Nullable: true,
}
return arrow.NewSchema([]arrow.Field{field},
nil)
},
record: func(rq *require.Assertions, schema
*arrow.Schema) arrow.Record {
b :=
array.NewTime64Builder(memory.DefaultAllocator, &arrow.Time64Type{Unit:
arrow.Nanosecond})
defer b.Release()
t1, err :=
arrow.Time64FromString("10:00:00.000000", arrow.Nanosecond)
rq.NoError(err, "Failed to create Time64 value")
b.AppendValues([]arrow.Time64{t1}, []bool{true})
return array.NewRecord(schema,
[]arrow.Array{b.NewArray()}, 1)
},
val: func(rq *require.Assertions) expr.Literal {
v, err :=
arrow.Time64FromString("11:00:00.000000", arrow.Nanosecond)
rq.NoError(err, "Failed to create Time64 value")
return expr.NewPrimitiveLiteral(types.Time(v),
true)
},
},
{
name: "expect arrow.TIMESTAMP (ns) ok",
schema: func() *arrow.Schema {
field := arrow.Field{
Name: "col",
Type: &arrow.TimestampType{Unit:
arrow.Nanosecond},
Nullable: true,
}
return arrow.NewSchema([]arrow.Field{field},
nil)
},
record: func(rq *require.Assertions, schema
*arrow.Schema) arrow.Record {
b :=
array.NewTimestampBuilder(memory.DefaultAllocator, &arrow.TimestampType{Unit:
arrow.Nanosecond})
defer b.Release()
t1, err :=
arrow.TimestampFromString("2021-01-01T10:00:00.000000Z", arrow.Nanosecond)
rq.NoError(err, "Failed to create Timestamp
value")
b.AppendValues([]arrow.Timestamp{t1},
[]bool{true})
return array.NewRecord(schema,
[]arrow.Array{b.NewArray()}, 1)
},
val: func(rq *require.Assertions) expr.Literal {
v, err :=
arrow.TimestampFromString("2021-01-01T11:00:00.000000Z", arrow.Nanosecond)
rq.NoError(err, "Failed to create Timestamp
value")
return
expr.NewPrimitiveLiteral(types.Timestamp(v), true)
},
},
{
name: "expect arrow.DECIMAL128 ok",
schema: func() *arrow.Schema {
field := arrow.Field{
Name: "col",
Type:
&arrow.Decimal128Type{Precision: 38, Scale: 10},
Nullable: true,
}
return arrow.NewSchema([]arrow.Field{field},
nil)
},
record: func(rq *require.Assertions, schema
*arrow.Schema) arrow.Record {
b :=
array.NewDecimal128Builder(memory.DefaultAllocator,
&arrow.Decimal128Type{Precision: 38, Scale: 10})
defer b.Release()
d, err :=
decimal.Decimal128FromFloat(123.456789, 38, 10)
rq.NoError(err, "Failed to create Decimal128
value")
b.Append(d)
return array.NewRecord(schema,
[]arrow.Array{b.NewArray()}, 1)
},
val: func(rq *require.Assertions) expr.Literal {
v, p, s, err :=
expr.DecimalStringToBytes("456.7890123456")
rq.NoError(err, "Failed to convert decimal
string to bytes")
lit, err := expr.NewLiteral(&types.Decimal{
Value: v[:16],
Precision: p,
Scale: s,
}, true)
rq.NoError(err, "Failed to create Decimal128
literal")
return lit
},
},
}
for _, tc := range tt {
t.Run(tc.name, func(t *testing.T) {
t.Parallel()
ctx := t.Context()
rq := require.New(t)
schema := tc.schema()
record := tc.record(rq, schema)
extSet := exprs.GetExtensionIDSet(ctx)
builder := exprs.NewExprBuilder(extSet)
err := builder.SetInputSchema(schema)
rq.NoError(err, "Failed to set input schema")
b, err := builder.CallScalar("less", nil,
builder.FieldRef("col"),
builder.Literal(tc.val(rq)),
)
rq.NoError(err, "Failed to call scalar")
e, err := b.BuildExpr()
rq.NoError(err, "Failed to build expression")
ctx = exprs.WithExtensionIDSet(ctx, extSet)
dr := compute.NewDatum(record)
defer dr.Release()
_, err = exprs.ExecuteScalarExpression(ctx, schema, e,
dr)
rq.NoError(err, "Failed to execute scalar expression")
})
}
}
```
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