misi1987107 commented on code in PR #10000:
URL: https://github.com/apache/seatunnel/pull/10000#discussion_r2512684199
##########
seatunnel-transforms-v2/src/test/java/org/apache/seatunnel/transform/sql/zeta/CastFunctionTest.java:
##########
@@ -54,4 +55,29 @@ public void testCastFunction() {
Assertions.assertEquals(Byte.parseByte("1"), f2Object);
Assertions.assertEquals(Short.parseShort("1"), f3Object);
}
+
+ @Test
+ public void testCastFunctionWithNullNestedField() {
+ SQLEngine sqlEngine =
SQLEngineFactory.getSQLEngine(SQLEngineFactory.EngineType.ZETA);
+
+ SeaTunnelRowType rowType =
+ new SeaTunnelRowType(
+ new String[] {"user"},
+ new SeaTunnelDataType[] {
+ new MapType<>(BasicType.STRING_TYPE,
BasicType.STRING_TYPE)
+ });
+
+ SeaTunnelRow inputRow = new SeaTunnelRow(new Object[] {null});
+
+ sqlEngine.init("test", null, rowType, "select user.address as address
from test");
+
+ SeaTunnelRowType outRowType = sqlEngine.typeMapping(null);
+
+ SeaTunnelRow outRow = sqlEngine.transformBySQL(inputRow,
outRowType).get(0);
+
+ Object addressField = outRow.getField(0);
+ Assertions.assertNull(
+ addressField,
+ "When casting nested field where intermediate value is null,
result should be null");
+ }
Review Comment:
OK，I will add some normal scenarios test cases.
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