handle 1e1 notiation correctly, also big large numbers in a more sane way

ast/postgresql.ts

@@ -448,7 +448,7 @@ export type alter_table_stmt = AstStatement<alter_table_stmt_node>;
 
 export type alter_action_list = alter_action[];
 
-export type alter_action = ALTER_ADD_COLUMN | ALTER_ADD_CONSTRAINT | ALTER_DROP_COLUMN | ALTER_ADD_INDEX_OR_KEY | ALTER_ADD_FULLETXT_SPARITAL_INDEX | ALTER_RENAME | ALTER_ALGORITHM | ALTER_LOCK | ALTER_OWNER_TO | ALTER_COLUMN_DATA_TYPE | ALTER_COLUMN_DEFAULT | ALTER_COLUMN_NOT_NULL;
+export type alter_action = ALTER_ADD_COLUMN | ALTER_ADD_CONSTRAINT | ALTER_DROP_CONSTRAINT | ALTER_DROP_COLUMN | ALTER_ADD_INDEX_OR_KEY | ALTER_ADD_FULLETXT_SPARITAL_INDEX | ALTER_RENAME | ALTER_ALGORITHM | ALTER_LOCK | ALTER_OWNER_TO | ALTER_COLUMN_DATA_TYPE | ALTER_COLUMN_DEFAULT | ALTER_COLUMN_NOT_NULL;
 
 
 
@@ -482,6 +482,16 @@ export type ALTER_ADD_CONSTRAINT = {
 
 
 
+export type ALTER_DROP_CONSTRAINT = {
+        action: 'drop';
+        constraint: ident,
+        keyword: 'constraint',
+        resource: 'constraint',
+        type: 'alter';
+      };
+
+
+
 export type ALTER_ADD_INDEX_OR_KEY = {
          action: 'add';
          type: 'alter';