fix(engine/sqlite): added function to convert cast node

internal/endtoend/testdata/cast_param/sqlite/query.sql

@@ -0,0 +1,10 @@
+create table my_table
+(
+    invalid boolean,
+    foo     varchar
+);
+
+-- name: GetData :many
+select *
+from my_table
+where (cast(sqlc.arg(allow_invalid) as boolean) or not invalid);

internal/endtoend/testdata/cast_param/sqlite/sqlc.json

@@ -0,0 +1,12 @@
+{
+    "version": "1",
+    "packages": [
+        {
+            "path": "go",
+            "engine": "sqlite",
+            "schema": "query.sql",
+            "queries": "query.sql",
+            "name": "querytest"
+        }
+    ]
+}

internal/engine/sqlite/convert.go

@@ -887,6 +887,21 @@ func (c *cc) convertBetweenExpr(n *parser.Expr_betweenContext) ast.Node {
 	}
 }
 
+func (c *cc) convertCastExpr(n *parser.Expr_castContext) ast.Node {
+	name := n.Type_name().GetText()
+	return &ast.TypeCast{
+		Arg: c.convert(n.Expr()),
+		TypeName: &ast.TypeName{
+			Name: name,
+			Names: &ast.List{Items: []ast.Node{
+				NewIdentifer(name),
+			}},
+			ArrayBounds: &ast.List{},
+		},
+		Location: n.GetStart().GetStart(),
+	}
+}
+
 func (c *cc) convert(node node) ast.Node {
 	switch n := node.(type) {
 
@@ -966,6 +981,9 @@ func (c *cc) convert(node node) ast.Node {
 	case *parser.Update_stmt_limitedContext:
 		return c.convertUpdate_stmtContext(n)
 
+	case *parser.Expr_castContext:
+		return c.convertCastExpr(n)
+
 	default:
 		return todo("convert(case=default)", n)
 	}