Support custom fts5 queries

moor/lib/src/runtime/query_builder/schema/table_info.dart

@@ -60,6 +60,11 @@ mixin TableInfo<TableDsl extends Table, D extends DataClass> on Table {
   /// Maps the given row returned by the database into the fitting data class.
   D map(Map<String, dynamic> data, {String tablePrefix});
 
+  /// Like [map], but from a [row] instead of the low-level map.
+  D mapFromRow(QueryRow row, {String tablePrefix}) {
+    return map(row.data, tablePrefix: tablePrefix);
+  }
+
   TableInfo<TableDsl, D> createAlias(String alias);
 
   @override

moor/test/data/tables/custom_tables.g.dart

@@ -1113,10 +1113,7 @@ abstract class _$CustomTablesDb extends GeneratedDatabase {
   Email _email;
   Email get email => _email ??= Email(this);
   Config _rowToConfig(QueryRow row) {
-    return Config(
-      configKey: row.readString('config_key'),
-      configValue: row.readString('config_value'),
-    );
+    return config.mapFromRow(row);
   }
 
   Selectable<Config> readConfig(String var1) {
@@ -1157,6 +1154,17 @@ abstract class _$CustomTablesDb extends GeneratedDatabase {
         readsFrom: {config}).map(_rowToConfig);
   }
 
+  EMail _rowToEMail(QueryRow row) {
+    return email.mapFromRow(row);
+  }
+
+  Selectable<EMail> searchEmails(String term) {
+    return customSelectQuery(
+        'SELECT * FROM email WHERE email MATCH :term ORDER BY rank',
+        variables: [Variable.withString(term)],
+        readsFrom: {email}).map(_rowToEMail);
+  }
+
   ReadRowIdResult _rowToReadRowIdResult(QueryRow row) {
     return ReadRowIdResult(
       rowid: row.readInt('rowid'),

moor/test/data/tables/tables.moor

@@ -34,6 +34,8 @@ readMultiple: SELECT * FROM config WHERE config_key IN ? ORDER BY $clause;
 readDynamic: SELECT * FROM config WHERE $predicate;
 findValidJsons: SELECT * FROM config WHERE json_valid(config_value);
 
+searchEmails: SELECT * FROM email WHERE email MATCH :term ORDER BY rank;
+
 readRowId: SELECT oid, * FROM config WHERE _rowid_ = $expr;
 
 cfeTest: WITH RECURSIVE

moor/test/data/tables/todos.g.dart

@@ -1372,13 +1372,7 @@ abstract class _$TodoDb extends GeneratedDatabase {
   }
 
   TodoEntry _rowToTodoEntry(QueryRow row) {
-    return TodoEntry(
-      id: row.readInt('id'),
-      title: row.readString('title'),
-      content: row.readString('content'),
-      targetDate: row.readDateTime('target_date'),
-      category: row.readInt('category'),
-    );
+    return todosTable.mapFromRow(row);
   }
 
   Selectable<TodoEntry> withInQuery(String var1, String var2, List<int> var3) {
@@ -1499,13 +1493,7 @@ mixin _$SomeDaoMixin on DatabaseAccessor<TodoDb> {
   $SharedTodosTable get sharedTodos => db.sharedTodos;
   $TodosTableTable get todosTable => db.todosTable;
   TodoEntry _rowToTodoEntry(QueryRow row) {
-    return TodoEntry(
-      id: row.readInt('id'),
-      title: row.readString('title'),
-      content: row.readString('content'),
-      targetDate: row.readDateTime('target_date'),
-      category: row.readInt('category'),
-    );
+    return todosTable.mapFromRow(row);
   }
 
   Selectable<TodoEntry> todosForUserQuery(int user) {

moor_generator/lib/src/analyzer/moor/create_table_reader.dart

@@ -23,6 +23,8 @@ class CreateTableReader {
     final primaryKey = <SpecifiedColumn>{};
 
     for (final column in table.resolvedColumns) {
+      if (!column.includedInResults) continue;
+
       var isPrimaryKey = false;
       final features = <ColumnFeature>[];
       final sqlName = column.name;

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

@@ -16,6 +16,7 @@ class TypeMapper {
   Table extractStructure(SpecifiedTable table) {
     final existingTable = table.declaration?.tableFromSqlParser;
     if (existingTable != null) {
+      _engineTablesToSpecified[existingTable] = table;
       return existingTable;
     }
 

moor_generator/lib/src/model/specified_table.dart

@@ -1,7 +1,7 @@
+import 'package:analyzer/dart/element/element.dart';
 import 'package:moor_generator/src/analyzer/options.dart';
 import 'package:moor_generator/src/analyzer/sql_queries/meta/declarations.dart';
 import 'package:moor_generator/src/model/specified_column.dart';
-import 'package:analyzer/dart/element/element.dart';
 import 'package:moor_generator/src/model/used_type_converter.dart';
 import 'package:recase/recase.dart';
 import 'package:sqlparser/sqlparser.dart';
@@ -34,6 +34,7 @@ class SpecifiedTable {
   /// The name for the data class associated with this table
   final String dartTypeName;
 
+  /// The getter name used for this table in a generated database or dao class.
   String get tableFieldName => _dbFieldName(_baseName);
   String get tableInfoName {
     // if this table was parsed from sql, a user might want to refer to it

moor_generator/lib/src/writer/queries/query_writer.dart

@@ -96,15 +96,25 @@ class QueryWriter {
     if (!_writtenMappingMethods.contains(_nameOfMappingMethod())) {
       _buffer
         ..write('${_select.resultClassName} ${_nameOfMappingMethod()}')
-        ..write('(QueryRow row) {\n')
-        ..write('return ${_select.resultClassName}(');
+        ..write('(QueryRow row) {\n');
 
+      // If we're matching an existing table from moor - let's just use the
+      // mapping method we're generating for each table!
+      if (_select.resultSet.matchingTable != null) {
+        final table = _select.resultSet.matchingTable;
+        _buffer.write('return ${table.tableFieldName}.mapFromRow(row);\n');
+      } else {
+        // For more complex results, generate a custom constructor call
+        _buffer.write('return ${_select.resultClassName}(');
         for (final column in _select.resultSet.columns) {
           final fieldName = _select.resultSet.dartNameFor(column);
           _buffer.write('$fieldName: ${_readingCode(column)},');
         }
 
-      _buffer.write(');\n}\n');
+        _buffer.write(');\n');
+      }
+      _buffer.write('}\n');
+
       _writtenMappingMethods.add(_nameOfMappingMethod());
     }
   }

sqlparser/lib/src/analysis/schema/column.dart

@@ -5,6 +5,12 @@ abstract class Column with Referencable, HasMetaMixin implements Typeable {
   /// The name of this column in the result set.
   String get name;
 
+  /// Whether this column is included in results when running a select query
+  /// like `SELECT * FROM table`.
+  ///
+  /// Some columns, notably the rowid aliases, are exempt from this.
+  bool get includedInResults => true;
+
   Column();
 }
 
@@ -85,6 +91,9 @@ class RowId extends TableColumn {
   // note that such alias is always called "rowid" in the result set -
   // "SELECT oid FROM table" yields a sinle column called "rowid"
   RowId() : super('rowid', const ResolvedType(type: BasicType.int));
+
+  @override
+  bool get includedInResults => false;
 }
 
 /// A column that is created by an expression. For instance, in the select

sqlparser/lib/src/analysis/steps/column_resolver.dart

@@ -131,6 +131,8 @@ class ColumnResolver extends RecursiveVisitor<void> {
     // result, but also expressions that appear as result columns
     for (final resultColumn in s.columns) {
       if (resultColumn is StarResultColumn) {
+        Iterable<Column> visibleColumnsForStar;
+
         if (resultColumn.tableName != null) {
           final tableResolver = scope
               .resolve<ResolvesToResultSet>(resultColumn.tableName, orElse: () {
@@ -141,11 +143,15 @@ class ColumnResolver extends RecursiveVisitor<void> {
             ));
           });
 
-          usedColumns.addAll(tableResolver.resultSet.resolvedColumns);
+          visibleColumnsForStar = tableResolver.resultSet.resolvedColumns;
         } else {
-          // we have a * column, that would be all available columns
-          usedColumns.addAll(availableColumns);
+          // we have a * column without a table, that resolves to every columns
+          // available
+          visibleColumnsForStar = availableColumns;
         }
+
+        usedColumns
+            .addAll(visibleColumnsForStar.where((e) => e.includedInResults));
       } else if (resultColumn is ExpressionResultColumn) {
         final expression = resultColumn.expression;
         Column column;

sqlparser/lib/src/engine/module/fts5.dart

@@ -1,8 +1,6 @@
 import 'package:meta/meta.dart';
 import 'package:sqlparser/sqlparser.dart';
 
-final _rankColumn = _Fts5RankColumn();
-
 class Fts5Extension implements Extension {
   const Fts5Extension();
 
@@ -42,17 +40,40 @@ class _Fts5Table extends Table {
       {@required String name,
       List<TableColumn> columns,
       CreateVirtualTableStatement definition})
-      : super(name: name, resolvedColumns: columns, definition: definition);
-
-  @override
-  Column findColumn(String name) {
-    if (name == 'rank') {
-      return _rankColumn;
-    }
-    return super.findColumn(name);
-  }
+      : super(
+          name: name,
+          resolvedColumns: [
+            ...columns,
+            _Fts5RankColumn(),
+            _Fts5TableColumn(name),
+          ],
+          definition: definition,
+        );
 }
 
+/// The rank column, which we introduce to support queries like
+/// ```
+/// SELECT * FROM my_fts_table WHERE my_fts_table MATCH 'foo' ORDER BY rank;
+/// ```
 class _Fts5RankColumn extends TableColumn {
+  @override
+  bool get includedInResults => false;
+
   _Fts5RankColumn() : super('rank', const ResolvedType(type: BasicType.int));
 }
+
+/// A column that has the same name as the fts5 it's from. We introduce this
+/// column to support constructs like
+/// ```
+/// CREATE VIRTUAL TABLE foo USING fts5(bar, baz);
+/// query: SELECT * FROM foo WHERE foo MATCH 'something';
+/// ```
+/// The easiest way to support that is to just make "foo" a column on that
+/// table.
+class _Fts5TableColumn extends TableColumn {
+  @override
+  bool get includedInResults => false;
+
+  _Fts5TableColumn(String name)
+      : super(name, const ResolvedType(type: BasicType.text));
+}