Adding upstream version 1.34.4.

Signed-off-by: Daniel Baumann <daniel@debian.org>

plugins/outputs/postgresql/utils/column.go

@@ -0,0 +1,53 @@
+package utils
+
+// This is split out from the 'postgresql' package as its depended upon by both the 'postgresql' and
+// 'postgresql/template' packages.
+
+import (
+	"sort"
+	"strings"
+)
+
+// ColumnRole specifies the role of a column in a metric.
+// It helps map the columns to the DB.
+type ColumnRole int
+
+const (
+	TimeColType ColumnRole = iota + 1
+	TagsIDColType
+	TagColType
+	FieldColType
+)
+
+type Column struct {
+	Name string
+	// the data type of each column should have in the db. used when checking
+	// if the schema matches or it needs updates
+	Type string
+	// the role each column has, helps properly map the metric to the db
+	Role ColumnRole
+}
+
+// ColumnList implements sort.Interface.
+// Columns are sorted first into groups of time,tag_id,tags,fields, and then alphabetically within
+// each group.
+type ColumnList []Column
+
+func (cl ColumnList) Len() int {
+	return len(cl)
+}
+
+func (cl ColumnList) Less(i, j int) bool {
+	if cl[i].Role != cl[j].Role {
+		return cl[i].Role < cl[j].Role
+	}
+	return strings.ToLower(cl[i].Name) < strings.ToLower(cl[j].Name)
+}
+
+func (cl ColumnList) Swap(i, j int) {
+	cl[i], cl[j] = cl[j], cl[i]
+}
+
+func (cl ColumnList) Sort() {
+	sort.Sort(cl)
+}