opensource/grafana
1
0
Fork 0
mirror of https://github.com/grafana/grafana.git synced 2025-09-27 05:43:43 +08:00
Code Issues Packages Projects Releases Wiki Activity

sql datasource: extract common logic for converting value column to float

Browse Source
This commit is contained in:
Marcus Efraimsson
2018-04-24 19:50:14 +02:00
parent d36efddcf7
commit 76bd2aea44
2 changed files with 207 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

109
pkg/tsdb/sql_engine.go
View File

@ -2,9 +2,12 @@ package tsdb
import (
"context"
"fmt"
"sync"
"time"
"github.com/grafana/grafana/pkg/components/null"
"github.com/go-xorm/core"
"github.com/go-xorm/xorm"
"github.com/grafana/grafana/pkg/components/simplejson"
@ -185,3 +188,109 @@ func ConvertSqlTimeColumnToEpochMs(values RowValues, timeIndex int) {
}
}
}
// ConvertSqlValueColumnToFloat converts timeseries value column to float.
func ConvertSqlValueColumnToFloat(columnName string, columnValue interface{}) (null.Float, error) {
var value null.Float
switch typedValue := columnValue.(type) {
case int:
value = null.FloatFrom(float64(typedValue))
case *int:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case int64:
value = null.FloatFrom(float64(typedValue))
case *int64:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case int32:
value = null.FloatFrom(float64(typedValue))
case *int32:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case int16:
value = null.FloatFrom(float64(typedValue))
case *int16:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case int8:
value = null.FloatFrom(float64(typedValue))
case *int8:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case uint:
value = null.FloatFrom(float64(typedValue))
case *uint:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case uint64:
value = null.FloatFrom(float64(typedValue))
case *uint64:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case uint32:
value = null.FloatFrom(float64(typedValue))
case *uint32:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case uint16:
value = null.FloatFrom(float64(typedValue))
case *uint16:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case uint8:
value = null.FloatFrom(float64(typedValue))
case *uint8:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case float64:
value = null.FloatFrom(typedValue)
case *float64:
value = null.FloatFromPtr(typedValue)
case float32:
value = null.FloatFrom(float64(typedValue))
case *float32:
if typedValue == nil {
value.Valid = false
} else {
value = null.FloatFrom(float64(*typedValue))
}
case nil:
value.Valid = false
default:
return null.NewFloat(0, false), fmt.Errorf("Value column must have numeric datatype, column: %s type: %T value: %v", columnName, typedValue, typedValue)
}
return value, nil
}