[CALCITE-7410] TIMESTAMP type for TUMBLE and HOP is hardwired to TIMESTAMP(3)

Signed-off-by: Mihai Budiu <mbudiu@feldera.com>

Author: mihaibudiu

core/src/main/java/org/apache/calcite/sql/SqlWindowTableFunction.java

@@ -110,8 +110,8 @@ private static RelDataType inferRowType(SqlOperatorBinding opBinding) {
     return typeFactory.builder()
         .kind(inputRowType.getStructKind())
         .addAll(inputRowType.getFieldList())
-        .add("window_start", SqlTypeName.TIMESTAMP, 3)
-        .add("window_end", SqlTypeName.TIMESTAMP, 3)
+        .add("window_start", SqlTypeName.TIMESTAMP)
+        .add("window_end", SqlTypeName.TIMESTAMP)
         .build();
   }