From 063d0146f922b1ed6388f40e05ae8eb0c547083d Mon Sep 17 00:00:00 2001
From: Marvin W <git@larma.de>
Date: Thu, 12 Jul 2018 20:27:50 +0200
Subject: [PATCH] QLite: Add OFFSET statement

---
 qlite/src/query_builder.vala | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/qlite/src/query_builder.vala b/qlite/src/query_builder.vala
index 75fe0499..915e2d2d 100644
--- a/qlite/src/query_builder.vala
+++ b/qlite/src/query_builder.vala
@@ -20,8 +20,9 @@ public class QueryBuilder : StatementBuilder {
     // ORDER BY [...]
     private OrderingTerm[]? order_by_terms = {};
 
-    // LIMIT [...]
+    // LIMIT [...] OFFSET [...]
     private int limit_val;
+    private int offset_val;
 
     internal QueryBuilder(Database db) {
         base(db);
@@ -103,6 +104,12 @@ public class QueryBuilder : StatementBuilder {
         return this;
     }
 
+    public QueryBuilder offset(int offset) {
+        if (this.limit_val == 0) error("limit required before offset");
+        this.offset_val = offset;
+        return this;
+    }
+
     public QueryBuilder single() {
         this.single_result = true;
         return limit(1);
@@ -128,7 +135,7 @@ public class QueryBuilder : StatementBuilder {
     }
 
     internal override Statement prepare() {
-        Statement stmt = db.prepare(@"SELECT $column_selector $(table_name == null ? "" : @"FROM $((!) table_name)") WHERE $selection $(OrderingTerm.all_to_string(order_by_terms)) $(limit_val > 0 ? @" LIMIT $limit_val" : "")");
+        Statement stmt = db.prepare(@"SELECT $column_selector $(table_name == null ? "" : @"FROM $((!) table_name)") WHERE $selection $(OrderingTerm.all_to_string(order_by_terms)) $(limit_val > 0 ? @" LIMIT $limit_val OFFSET $offset_val" : "")");
         for (int i = 0; i < selection_args.length; i++) {
             selection_args[i].bind(stmt, i+1);
         }