Extend the refactoring into extensions.  Clean up stray newlines.

FossilOrigin-Name: 7a876209a678a34c198b54ceef9e3c041f128a14dc73357f6a57cadadaa6cf7b
diff --git a/tool/sqldiff.c b/tool/sqldiff.c
index 9f5b6fe..3590e2c 100644
--- a/tool/sqldiff.c
+++ b/tool/sqldiff.c
@@ -416,7 +416,7 @@
   const char *zSep;         /* Separator string */
   Str ins;                  /* Beginning of the INSERT statement */
 
-  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master WHERE name=%Q", zTab);
+  pStmt = db_prepare("SELECT sql FROM aux.sqlite_schema WHERE name=%Q", zTab);
   if( SQLITE_ROW==sqlite3_step(pStmt) ){
     fprintf(out, "%s;\n", sqlite3_column_text(pStmt,0));
   }
@@ -466,7 +466,7 @@
     sqlite3_finalize(pStmt);
     strFree(&ins);
   } /* endif !g.bSchemaOnly */
-  pStmt = db_prepare("SELECT sql FROM aux.sqlite_master"
+  pStmt = db_prepare("SELECT sql FROM aux.sqlite_schema"
                      " WHERE type='index' AND tbl_name=%Q AND sql IS NOT NULL",
                      zTab);
   while( SQLITE_ROW==sqlite3_step(pStmt) ){
@@ -639,10 +639,10 @@
 
   /* Drop indexes that are missing in the destination */
   pStmt = db_prepare(
-    "SELECT name FROM main.sqlite_master"
+    "SELECT name FROM main.sqlite_schema"
     " WHERE type='index' AND tbl_name=%Q"
     "   AND sql IS NOT NULL"
-    "   AND sql NOT IN (SELECT sql FROM aux.sqlite_master"
+    "   AND sql NOT IN (SELECT sql FROM aux.sqlite_schema"
     "                    WHERE type='index' AND tbl_name=%Q"
     "                      AND sql IS NOT NULL)",
     zTab, zTab);
@@ -700,10 +700,10 @@
 
   /* Create indexes that are missing in the source */
   pStmt = db_prepare(
-    "SELECT sql FROM aux.sqlite_master"
+    "SELECT sql FROM aux.sqlite_schema"
     " WHERE type='index' AND tbl_name=%Q"
     "   AND sql IS NOT NULL"
-    "   AND sql NOT IN (SELECT sql FROM main.sqlite_master"
+    "   AND sql NOT IN (SELECT sql FROM main.sqlite_schema"
     "                    WHERE type='index' AND tbl_name=%Q"
     "                      AND sql IS NOT NULL)",
     zTab, zTab);
@@ -728,7 +728,7 @@
 */
 static void checkSchemasMatch(const char *zTab){
   sqlite3_stmt *pStmt = db_prepare(
-      "SELECT A.sql=B.sql FROM main.sqlite_master A, aux.sqlite_master B"
+      "SELECT A.sql=B.sql FROM main.sqlite_schema A, aux.sqlite_schema B"
       " WHERE A.name=%Q AND B.name=%Q", zTab, zTab
   );
   if( SQLITE_ROW==sqlite3_step(pStmt) ){
@@ -1757,7 +1757,7 @@
 **   module_name(SQL)
 **
 ** The only argument should be an SQL statement of the type that may appear
-** in the sqlite_master table. If the statement is a "CREATE VIRTUAL TABLE"
+** in the sqlite_schema table. If the statement is a "CREATE VIRTUAL TABLE"
 ** statement, then the value returned is the name of the module that it
 ** uses. Otherwise, if the statement is not a CVT, NULL is returned.
 */
@@ -1816,32 +1816,32 @@
     assert( rc==SQLITE_OK );
   
     return 
-      "SELECT name FROM main.sqlite_master\n"
+      "SELECT name FROM main.sqlite_schema\n"
       " WHERE type='table' AND (\n"
       "    module_name(sql) IS NULL OR \n"
       "    module_name(sql) IN (SELECT module FROM temp.tblmap)\n"
       " ) AND name NOT IN (\n"
       "  SELECT a.name || b.postfix \n"
-        "FROM main.sqlite_master AS a, temp.tblmap AS b \n"
+        "FROM main.sqlite_schema AS a, temp.tblmap AS b \n"
         "WHERE module_name(a.sql) = b.module\n" 
       " )\n"
       "UNION \n"
-      "SELECT name FROM aux.sqlite_master\n"
+      "SELECT name FROM aux.sqlite_schema\n"
       " WHERE type='table' AND (\n"
       "    module_name(sql) IS NULL OR \n"
       "    module_name(sql) IN (SELECT module FROM temp.tblmap)\n"
       " ) AND name NOT IN (\n"
       "  SELECT a.name || b.postfix \n"
-        "FROM aux.sqlite_master AS a, temp.tblmap AS b \n"
+        "FROM aux.sqlite_schema AS a, temp.tblmap AS b \n"
         "WHERE module_name(a.sql) = b.module\n" 
       " )\n"
       " ORDER BY name";
   }else{
     return
-      "SELECT name FROM main.sqlite_master\n"
+      "SELECT name FROM main.sqlite_schema\n"
       " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
       " UNION\n"
-      "SELECT name FROM aux.sqlite_master\n"
+      "SELECT name FROM aux.sqlite_schema\n"
       " WHERE type='table' AND sql NOT LIKE 'CREATE VIRTUAL%%'\n"
       " ORDER BY name";
   }
@@ -1955,7 +1955,7 @@
   if( rc ){
     cmdlineError("cannot open database file \"%s\"", zDb1);
   }
-  rc = sqlite3_exec(g.db, "SELECT * FROM sqlite_master", 0, 0, &zErrMsg);
+  rc = sqlite3_exec(g.db, "SELECT * FROM sqlite_schema", 0, 0, &zErrMsg);
   if( rc || zErrMsg ){
     cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb1);
   }
@@ -1974,7 +1974,7 @@
   if( rc || zErrMsg ){
     cmdlineError("cannot attach database \"%s\"", zDb2);
   }
-  rc = sqlite3_exec(g.db, "SELECT * FROM aux.sqlite_master", 0, 0, &zErrMsg);
+  rc = sqlite3_exec(g.db, "SELECT * FROM aux.sqlite_schema", 0, 0, &zErrMsg);
   if( rc || zErrMsg ){
     cmdlineError("\"%s\" does not appear to be a valid SQLite database", zDb2);
   }