新增 支持pgsql、kingbasees、mysql三种数据库

src/main/resources/pgsql/create_table_sequences.sql

@@ -0,0 +1,11 @@
+CREATE TABLE IF NOT EXISTS "sequences"
+(
+    "key"  VARCHAR(64) NOT NULL,
+    "type" VARCHAR(64) NOT NULL,
+    "seq"  INT8        NOT NULL,
+    PRIMARY KEY ("key", "type")
+);
+COMMENT ON TABLE "sequences" IS '当前序号表';
+COMMENT ON COLUMN "sequences"."key" IS '序号英文名称';
+COMMENT ON COLUMN "sequences"."type" IS '序号类型';
+COMMENT ON COLUMN "sequences"."seq" IS '已使用到的序号';