Index: src/main.c
==================================================================
--- src/main.c
+++ src/main.c
@@ -989,10 +989,56 @@
     r = nKey1-nKey2;
   }
   return r;
 }
 
+#ifndef SQLITE_OMIT_UINT_COLLSEQ
+/*
+** The UINT collating function that compares text byte-by-byte but compares
+** digits in numeric order.
+*/
+static int uintCollFunc(
+  void *notUsed,
+  int nKey1, const void *pKey1,
+  int nKey2, const void *pKey2
+){
+  const unsigned char *zA = (const unsigned char*)pKey1;
+  const unsigned char *zB = (const unsigned char*)pKey2;
+  int i=0, j=0, x;
+  while( i<nKey1 && j<nKey2 ){
+    x = zA[i] - zB[j];
+    if( sqlite3Isdigit(zA[i]) ){
+      int k;
+      if( !sqlite3Isdigit(zB[j]) ) return x;
+      while( i<nKey1 && zA[i]=='0' ){ i++; }
+      while( j<nKey2 && zB[j]=='0' ){ j++; }
+      k = 0;
+      while( i+k<nKey1 && sqlite3Isdigit(zA[i+k])
+             && j+k<nKey2 && sqlite3Isdigit(zB[j+k]) ){
+        k++;
+      }
+      if( i+k<nKey1 && sqlite3Isdigit(zA[i+k]) ){
+        return +1;
+      }else if( j+k<nKey2 && sqlite3Isdigit(zB[j+k]) ){
+        return -1;
+      }else{
+        x = memcmp(zA+i, zB+j, k);
+        if( x ) return x;
+        i += k;
+        j += k;
+      }
+    }else if( x ){
+      return x;
+    }else{
+      i++;
+      j++;
+    }
+  }
+  return (nKey1 - i) - (nKey2 - j);
+}
+#endif /* SQLITE_OMIT_UINT_COLLSEQ */
+
 /*
 ** Return the ROWID of the most recent insert
 */
 sqlite_int64 sqlite3_last_insert_rowid(sqlite3 *db){
 #ifdef SQLITE_ENABLE_API_ARMOR
@@ -3206,10 +3252,13 @@
   createCollation(db, sqlite3StrBINARY, SQLITE_UTF8, 0, binCollFunc, 0);
   createCollation(db, sqlite3StrBINARY, SQLITE_UTF16BE, 0, binCollFunc, 0);
   createCollation(db, sqlite3StrBINARY, SQLITE_UTF16LE, 0, binCollFunc, 0);
   createCollation(db, "NOCASE", SQLITE_UTF8, 0, nocaseCollatingFunc, 0);
   createCollation(db, "RTRIM", SQLITE_UTF8, 0, rtrimCollFunc, 0);
+#ifndef SQLITE_OMIT_UINT_COLLSEQ
+  createCollation(db, "UINT", SQLITE_UTF8, 0, uintCollFunc, 0);
+#endif
   if( db->mallocFailed ){
     goto opendb_out;
   }
 
   /* Parse the filename/URI argument

Index: tool/omittest.tcl
==================================================================
--- tool/omittest.tcl
+++ tool/omittest.tcl
@@ -240,10 +240,11 @@
     SQLITE_OMIT_TEMPDB \
     SQLITE_OMIT_TEST_CONTROL \
     SQLITE_OMIT_TRACE \
     SQLITE_OMIT_TRIGGER \
     SQLITE_OMIT_TRUNCATE_OPTIMIZATION \
+    SQLITE_OMIT_UINT_COLLSEQ \
     SQLITE_OMIT_UPSERT \
     SQLITE_OMIT_UTF16 \
     SQLITE_OMIT_VACUUM \
     SQLITE_OMIT_VIEW \
     SQLITE_OMIT_VIRTUALTABLE \