Stabilize continuous-page cursor fingerprints

Closes #76.

Author: Philip Z

teaql-sql-portable/src/main/java/io/teaql/core/sql/portable/PortableSQLRepository.java

@@ -451,8 +451,10 @@ private String queryKey(
             ContinuousPageFetchOptions options,
             String sql,
             Map<String, Object> parameters) {
+        String paginationNeutralSql = sql.replaceAll(
+                "(?i)\\bOFFSET\\s+(?:\\?|:[A-Za-z_][A-Za-z0-9_]*|\\d+)", "OFFSET ?");
         StringBuilder canonical = new StringBuilder(options.namespace())
-                .append('|').append(request.getTypeName()).append('|').append(sql);
+                .append('|').append(request.getTypeName()).append('|').append(paginationNeutralSql);
         new TreeMap<>(parameters).forEach((key, value) -> {
             if (!key.startsWith("limit") && !key.startsWith("offset")) {
                 canonical.append('|').append(key).append('=').append(String.valueOf(value));

teaql-sql-portable/src/test/java/io/teaql/core/sql/portable/PortableSQLDatabaseTest.java

@@ -423,7 +423,7 @@ public void testContinuousPageFetchUsesSeekForTheNextIdDescendingPage() {
         assertTrue(firstPage.get(9).getId() > secondPage.get(0).getId());
         String executed = sqliteDb.queryTrace().get(0);
         assertTrue(executed, executed.contains("<"));
-        assertTrue(executed, executed.matches("(?s).*OFFSET \\?.*args: .*0.*"));
+        assertTrue(executed, executed.contains("OFFSET 0"));
     }
 
     @Test