STOR-519: Add db-connect, a SQL over HTTPS server

vendor/github.com/kshvakov/clickhouse/lib/column/common.go

@@ -0,0 +1,56 @@
+package column
+
+import (
+	"fmt"
+	"reflect"
+	"time"
+)
+
+type ErrUnexpectedType struct {
+	Column Column
+	T      interface{}
+}
+
+func (err *ErrUnexpectedType) Error() string {
+	return fmt.Sprintf("%s: unexpected type %T", err.Column, err.T)
+}
+
+var baseTypes = map[interface{}]reflect.Value{
+	int8(0):     reflect.ValueOf(int8(0)),
+	int16(0):    reflect.ValueOf(int16(0)),
+	int32(0):    reflect.ValueOf(int32(0)),
+	int64(0):    reflect.ValueOf(int64(0)),
+	uint8(0):    reflect.ValueOf(uint8(0)),
+	uint16(0):   reflect.ValueOf(uint16(0)),
+	uint32(0):   reflect.ValueOf(uint32(0)),
+	uint64(0):   reflect.ValueOf(uint64(0)),
+	float32(0):  reflect.ValueOf(float32(0)),
+	float64(0):  reflect.ValueOf(float64(0)),
+	string(""):  reflect.ValueOf(string("")),
+	time.Time{}: reflect.ValueOf(time.Time{}),
+}
+
+type base struct {
+	name, chType string
+	valueOf      reflect.Value
+}
+
+func (base *base) Name() string {
+	return base.name
+}
+
+func (base *base) CHType() string {
+	return base.chType
+}
+
+func (base *base) ScanType() reflect.Type {
+	return base.valueOf.Type()
+}
+
+func (base *base) defaultValue() interface{} {
+	return base.valueOf.Interface()
+}
+
+func (base *base) String() string {
+	return fmt.Sprintf("%s (%s)", base.name, base.chType)
+}