索引DROP INDEX加 IF EXISTS

db/postgresql/migrations/2021-11-20-072239_wbw_templet/down.sql

@@ -0,0 +1,4 @@
+-- This file should undo anything in `up.sql`
+DROP INDEX  IF EXISTS  wbw_templet_book ;
+DROP INDEX  IF EXISTS  wbw_templet_book1 ;
+DROP TABLE wbw_templet ;

db/postgresql/migrations/2021-11-20-072239_wbw_templet/up.sql

@@ -0,0 +1,19 @@
+-- Your SQL goes here
+
+CREATE TABLE wbw_templet 
+( 
+	id SERIAL PRIMARY KEY,
+	book INTEGER  NOT NULL, 
+	paragraph INTEGER  NOT NULL, 
+	wid INTEGER  NOT NULL, 
+	word VARCHAR (1024),
+	real VARCHAR (1024),
+	type VARCHAR (64),
+	gramma VARCHAR (64),
+	part VARCHAR (1024),
+	style VARCHAR (64)
+);
+
+-- 索引：search
+CREATE INDEX wbw_templet_book ON wbw_templet ("book", "paragraph", "wid");
+CREATE INDEX wbw_templet_book1 ON wbw_templet ("book", "paragraph");

db/sqlite/wbw_templet/down.sql

@@ -1,4 +1,4 @@
 -- This file should undo anything in `up.sql`
+DROP INDEX  IF EXISTS  wbw_templet_book ;
+DROP INDEX  IF EXISTS  wbw_templet_book1 ;
 DROP TABLE wbw_templet ;
-DROP INDEX wbw_templet_book ;
-DROP INDEX wbw_templet_book1 ;