From bf58589444d954071e0ac168f0815ea3503c373b Mon Sep 17 00:00:00 2001
From: Magnus Persson <1431685+magnusp@users.noreply.github.com>
Date: Thu, 22 Oct 2026 23:53:42 +0200
Subject: [PATCH] fix(jdbc): wrap REAL to int like SQLite

getInt cast a REAL straight to int, which clamps. SQLite converts
through int64 and keeps the low 32 bits. Route REAL through long and
round INTEGER through double before narrowing to float, matching
SQLite's numeric conversion.

Fixes #101
---
 .../magnusp/libsql/jdbc/LibsqlResultSet.java  |  4 ++--
 .../libsql/jdbc/LibsqlResultSetTest.java      | 24 +++++++++++++++++++
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/libsql-jdbc/src/main/java/com/github/magnusp/libsql/jdbc/LibsqlResultSet.java b/libsql-jdbc/src/main/java/com/github/magnusp/libsql/jdbc/LibsqlResultSet.java
index a567f41..44b3247 100644
--- a/libsql-jdbc/src/main/java/com/github/magnusp/libsql/jdbc/LibsqlResultSet.java
+++ b/libsql-jdbc/src/main/java/com/github/magnusp/libsql/jdbc/LibsqlResultSet.java
@@ -458,7 +458,7 @@ public int getInt(int columnIndex) throws SQLException {
         return switch (val) {
             case Value.Null n -> 0;
             case Value.Integer i -> (int) i.value();
-            case Value.Float f -> (int) f.value();
+            case Value.Float f -> (int) (long) f.value();
             case Value.Text t -> (int) parseSqliteLong(t.value());
             case Value.Blob b -> (int) parseSqliteLong(blobAsText(b));
         };
@@ -474,7 +474,7 @@ public float getFloat(int columnIndex) throws SQLException {
         Value val = getCurrentValue(columnIndex);
         return switch (val) {
             case Value.Null n -> 0.0F;
-            case Value.Integer i -> (float) i.value();
+            case Value.Integer i -> (float) (double) i.value();
             case Value.Float f -> (float) f.value();
             case Value.Text t -> (float) parseSqliteDouble(t.value());
             case Value.Blob b -> (float) parseSqliteDouble(blobAsText(b));
diff --git a/libsql-jdbc/src/test/java/com/github/magnusp/libsql/jdbc/LibsqlResultSetTest.java b/libsql-jdbc/src/test/java/com/github/magnusp/libsql/jdbc/LibsqlResultSetTest.java
index 8e556db..1eeec5d 100644
--- a/libsql-jdbc/src/test/java/com/github/magnusp/libsql/jdbc/LibsqlResultSetTest.java
+++ b/libsql-jdbc/src/test/java/com/github/magnusp/libsql/jdbc/LibsqlResultSetTest.java
@@ -148,6 +148,30 @@ void realStorageTruncatesForIntegralGettersAndKeepsFractionForFloatingGetters()
         assertNumeric(rs, 1, 1, 1L, 1.9f, 1.9);
     }
 
+    @Test
+    void realStorageWrapsToIntThroughInt64LikeSqlite() throws SQLException {
+        LibsqlResultSet rs = resultSet(new Value.Float(3e9), new Value.Float(-3e9));
+
+        assertThat(rs.next()).isTrue();
+        assertThat(rs.getInt(1)).isEqualTo(-1294967296);
+        assertThat(rs.getObject(1, Integer.class)).isEqualTo(-1294967296);
+        assertThat(rs.getInt(2)).isEqualTo(1294967296);
+    }
+
+    @Test
+    void getBooleanOnWrappingRealIsFalse() throws SQLException {
+        LibsqlResultSet rs = resultSet(new Value.Float(4294967296.0));
+        assertThat(rs.next()).isTrue();
+        assertThat(rs.getBoolean(1)).isFalse();
+    }
+
+    @Test
+    void getFloatOnLargeIntegerRoundsThroughDouble() throws SQLException {
+        LibsqlResultSet rs = resultSet(new Value.Integer(1152921573326323713L));
+        assertThat(rs.next()).isTrue();
+        assertThat(rs.getFloat(1)).isEqualTo(1.1529215E18f);
+    }
+
     @Test
     void integerStorageIsReturnedUnchanged() throws SQLException {
         LibsqlResultSet rs = resultSet(new Value.Integer(42));