fix bug

insert_test.go

@@ -224,7 +224,7 @@ func ExampleInsertBuilder_subSelect_informix() {
 	fmt.Println(args)
 
 	// Output:
-	// INSERT INTO demo.user (id, name) SELECT id, name FROM demo.test WHERE id = :1
+	// INSERT INTO demo.user (id, name) SELECT id, name FROM demo.test WHERE id = ?
 	// [1]
 }
 

select.go

@@ -247,6 +247,24 @@ func (sb *SelectBuilder) BuildWithFlavor(flavor Flavor, initialArg ...interface{
 	if len(sb.selectCols) > 0 {
 		buf.WriteLeadingString("SELECT ")
 
+		if flavor == Informix {
+			if sb.offset >= 0 {
+				buf.WriteString("SKIP ")
+				buf.WriteString(strconv.Itoa(sb.offset))
+				buf.WriteString(" ")
+			}
+
+			if sb.limit > 0 {
+				if sb.offset < 0 {
+					buf.WriteString("SKIP 0 ")
+				}
+
+				buf.WriteString("FIRST ")
+				buf.WriteString(strconv.Itoa(sb.limit))
+				buf.WriteString(" ")
+			}
+		}
+
 		if sb.distinct {
 			buf.WriteString("DISTINCT ")
 		}
@@ -351,7 +369,7 @@ func (sb *SelectBuilder) BuildWithFlavor(flavor Flavor, initialArg ...interface{
 	}
 
 	switch flavor {
-	case MySQL, SQLite, ClickHouse, Informix:
+	case MySQL, SQLite, ClickHouse:
 		if sb.limit >= 0 {
 			buf.WriteLeadingString("LIMIT ")
 			buf.WriteString(strconv.Itoa(sb.limit))
@@ -423,6 +441,12 @@ func (sb *SelectBuilder) BuildWithFlavor(flavor Flavor, initialArg ...interface{
 				buf.WriteString(strconv.Itoa(min + 1))
 			}
 		}
+	case Informix:
+		// If ORDER BY is not set, sort column #1 by default.
+		// It's required to make OFFSET...FETCH work.
+		if len(sb.orderByCols) == 0 && (sb.limit >= 0 || sb.offset >= 0) {
+			buf.WriteLeadingString("ORDER BY 1")
+		}
 	}
 
 	if sb.limit >= 0 {

select_test.go

@@ -236,10 +236,10 @@ func ExampleSelectBuilder_limit_offset() {
 	//
 	// Informix
 	// #1: SELECT * FROM user
-	// #2: SELECT * FROM user
-	// #3: SELECT * FROM user LIMIT 1 OFFSET 0
-	// #4: SELECT * FROM user LIMIT 1
-	// #5: SELECT * FROM user ORDER BY id LIMIT 1 OFFSET 1
+	// #2: SELECT SKIP 0 * FROM user ORDER BY 1
+	// #3: SELECT SKIP 0 FIRST 1 * FROM user ORDER BY 1
+	// #4: SELECT SKIP 0 FIRST 1 * FROM user ORDER BY 1
+	// #5: SELECT SKIP 1 FIRST 1 * FROM user ORDER BY id
 }
 
 func ExampleSelectBuilder_ForUpdate() {