Support sqlite_master, sqlite_sequence tables (#197)

moor_generator/lib/src/analyzer/sql_queries/query_handler.dart

@@ -67,7 +67,8 @@ class QueryHandler {
     final tableFinder = ReferencedTablesVisitor();
     _select.accept(tableFinder);
     _foundTables = tableFinder.foundTables;
-    final moorTables = _foundTables.map(mapper.tableToMoor).toList();
+    final moorTables =
+        _foundTables.map(mapper.tableToMoor).where((s) => s != null).toList();
 
     return SqlSelectQuery(
         name, context, _foundElements, moorTables, _inferResultSet());
@@ -100,6 +101,12 @@ class QueryHandler {
       final table = candidatesForSingleTable.single;
       final moorTable = mapper.tableToMoor(table);
 
+      if (moorTable == null) {
+        // References a table not declared in any moor api (dart or moor file).
+        // This can happen for internal sqlite tables
+        return InferredResultSet(null, columns);
+      }
+
       final resultEntryToColumn = <ResultColumn, String>{};
       var matches = true;
 

sqlparser/CHANGELOG.md

@@ -1,5 +1,6 @@
 ## unreleased
 - Handle special `rowid`, `oid`, `__rowid__` references
+- Support references to `sqlite_master` and `sqlite_sequence` tables
 
 ## 0.3.0
 - parse compound select statements

sqlparser/lib/src/engine/builtin_tables.dart

@@ -0,0 +1,25 @@
+import 'package:sqlparser/sqlparser.dart';
+
+/// Constructs the "sqlite_sequence" table.
+Table get sqliteSequence {
+  final name = TableColumn('name', const ResolvedType(type: BasicType.text));
+  final seq = TableColumn('seq', const ResolvedType(type: BasicType.int));
+
+  return Table(name: 'sqlite_sequence', resolvedColumns: [name, seq]);
+}
+
+/// Constructs the "sqlite_master" table
+Table get sqliteMaster {
+  final type = TableColumn('type', const ResolvedType(type: BasicType.text));
+  final name = TableColumn('name', const ResolvedType(type: BasicType.text));
+  final tblName =
+      TableColumn('tbl_name', const ResolvedType(type: BasicType.text));
+  final rootPage =
+      TableColumn('rootpage', const ResolvedType(type: BasicType.int));
+  final sql = TableColumn('sql', const ResolvedType(type: BasicType.text));
+
+  return Table(
+    name: 'sqlite_master',
+    resolvedColumns: [type, name, tblName, rootPage, sql],
+  );
+}

sqlparser/lib/src/engine/sql_engine.dart

@@ -7,6 +7,8 @@ import 'package:sqlparser/src/reader/parser/parser.dart';
 import 'package:sqlparser/src/reader/tokenizer/scanner.dart';
 import 'package:sqlparser/src/reader/tokenizer/token.dart';
 
+import 'builtin_tables.dart';
+
 class SqlEngine {
   /// All tables registered with [registerTable].
   final List<Table> knownTables = [];
@@ -16,7 +18,10 @@ class SqlEngine {
   /// extensions enabled.
   final bool useMoorExtensions;
 
-  SqlEngine({this.useMoorExtensions = false});
+  SqlEngine({this.useMoorExtensions = false}) {
+    registerTable(sqliteMaster);
+    registerTable(sqliteSequence);
+  }
 
   /// Registers the [table], which means that it can later be used in sql
   /// statements.