schema: enable parsing a schema from an existing sqlx.DB instance

pkg/schema/parse.go

@@ -21,7 +21,6 @@ var create_views string
 func InitDB(sql_schema string) *sqlx.DB {
 	db := sqlx.MustOpen("sqlite3", ":memory:")
 	db.MustExec(sql_schema)
-	db.MustExec(create_views)
 	return db
 }
 
@@ -36,6 +35,7 @@ func SchemaFromSQLFile(filepath string) (Schema, error) {
 // SchemaFromDB takes a DB connection, checks its schema metadata tables, and returns a Schema.
 func SchemaFromDB(db *sqlx.DB) Schema {
 	ret := Schema{Tables: map[string]Table{}, Indexes: map[string]Index{}}
+	db.MustExec(create_views)
 
 	var tables []Table
 	PanicIf(db.Select(&tables, `select name, table_type, is_strict, is_without_rowid from tables`))