Adding column alias.

util/sqlgen/column.go

@@ -4,16 +4,37 @@ import (
 	"strings"
 )
 
+type column_t struct {
+	Name  string
+	Alias string
+}
+
 type Column struct {
 	Value string
 }
 
 func (self Column) String() string {
-	chunks := strings.Split(self.Value, Layout.ColumnSeparator)
+	input := strings.TrimSpace(self.Value)
+
+	chunks := reAliasSeparator.Split(input, 2)
+
+	name := chunks[0]
+
+	nameChunks := strings.SplitN(name, Layout.ColumnSeparator, 2)
+
+	for i := range nameChunks {
+		nameChunks[i] = strings.TrimSpace(nameChunks[i])
+		nameChunks[i] = mustParse(Layout.IdentifierQuote, Raw{nameChunks[i]})
+	}
+
+	name = strings.Join(nameChunks, Layout.ColumnSeparator)
+
+	var alias string
 
-	for i := range chunks {
-		chunks[i] = mustParse(Layout.IdentifierQuote, Raw{chunks[i]})
+	if len(chunks) > 1 {
+		alias = strings.TrimSpace(chunks[1])
+		alias = mustParse(Layout.IdentifierQuote, Raw{alias})
 	}
 
-	return strings.Join(chunks, Layout.ColumnSeparator)
+	return mustParse(Layout.ColumnAliasLayout, column_t{name, alias})
 }

util/sqlgen/column_test.go

@@ -16,3 +16,16 @@ func TestColumnString(t *testing.T) {
 		t.Fatalf("Got: %s, Expecting: %s", s, e)
 	}
 }
+
+func TestColumnAs(t *testing.T) {
+	var s, e string
+
+	column := Column{"role.name as foo"}
+
+	s = column.String()
+	e = `"role"."name" AS "foo"`
+
+	if s != e {
+		t.Fatalf("Got: %s, Expecting: %s", s, e)
+	}
+}

util/sqlgen/default.go

@@ -18,6 +18,7 @@ const (
 	defaultColumnValue     = `{{.Column}} {{.Operator}} {{.Value}}`
 
 	defaultTableAliasLayout  = `{{.Name}}{{if .Alias}} AS {{.Alias}}{{end}}`
+	defaultColumnAliasLayout = `{{.Name}}{{if .Alias}} AS {{.Alias}}{{end}}`
 
 	defaultSortByColumnLayout = `{{.Column}} {{.Sort}}`
 

util/sqlgen/layout.go

@@ -16,6 +16,7 @@ type layout struct {
 	ClauseOperator      string
 	ColumnValue         string
 	TableAliasLayout    string
+	ColumnAliasLayout   string
 	SortByColumnLayout  string
 	WhereLayout         string
 	OrderByLayout       string
@@ -45,6 +46,7 @@ var Layout = layout{
 	defaultClauseOperator,
 	defaultColumnValue,
 	defaultTableAliasLayout,
+	defaultColumnAliasLayout,
 	defaultSortByColumnLayout,
 	defaultWhereLayout,
 	defaultOrderByLayout,

util/sqlgen/table.go

@@ -7,7 +7,7 @@ import (
 
 var (
 	reTableSeparator = regexp.MustCompile(`\s*?,\s*?`)
-	reAliasSeparator = regexp.MustCompile(`(?i:AS)`)
+	reAliasSeparator = regexp.MustCompile(`(?i:\s+AS\s+)`)
 )
 
 type table_t struct {