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outputter.go
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outputter.go
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package output_data_staging //nolint:revive,stylecheck // package name is helpful
import (
"fmt"
"sort"
"strconv"
"github.com/stackql/psql-wire/pkg/sqldata"
"github.com/stackql/stackql/internal/stackql/internal_data_transfer/internaldto"
"github.com/stackql/stackql/internal/stackql/typing"
"github.com/stackql/stackql/internal/stackql/util"
)
type Outputter interface {
OutputExecutorResult() internaldto.ExecutorOutput
}
func NewNaiveOutputter(
packetPreparator PacketPreparator,
nonControlColumns []typing.ColumnMetadata,
typCfg typing.Config,
) Outputter {
return &naiveOutputter{
packetPreparator: packetPreparator,
nonControlColumns: nonControlColumns,
typCfg: typCfg,
}
}
type naiveOutputter struct {
packetPreparator PacketPreparator
nonControlColumns []typing.ColumnMetadata
typCfg typing.Config
}
func (st *naiveOutputter) OutputExecutorResult() internaldto.ExecutorOutput {
pkt, err := st.packetPreparator.PrepareOutputPacket()
if err != nil {
return internaldto.NewErroneousExecutorOutput(fmt.Errorf("sql packet preparation error: %w", err))
}
rows := pkt.GetRows()
rawRows := pkt.GetRawRows()
cNames := pkt.GetColumnNames()
colOIDs := pkt.GetColumnOIDs()
rowSort := func(m map[string]map[string]interface{}) []string {
var arr []int
for k := range m {
ord, _ := strconv.Atoi(k)
arr = append(arr, ord)
}
sort.Ints(arr)
var rv []string
for _, v := range arr {
rv = append(rv, strconv.Itoa(v))
}
return rv
}
rv := util.PrepareResultSet(
internaldto.NewPrepareResultSetPlusRawAndTypesDTO(
nil,
rows,
cNames,
colOIDs,
rowSort,
nil,
nil,
rawRows,
st.typCfg,
),
)
if rv.GetSQLResult() == nil {
var colz []string
for _, col := range st.nonControlColumns {
colz = append(colz, col.GetIdentifier())
}
rv.SetSQLResultFn(
func() sqldata.ISQLResultStream { return util.GetHeaderOnlyResultStream(colz, st.typCfg) },
)
}
return rv
}