<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">

<mapper namespace="com.qnfhq.dao.OracleGeneratorDao">
	<resultMap id="tableMap" type="map">
		<result column="TABLENAME" property="tableName"></result>
		<result column="TABLECOMMENT" property="tableComment"></result>
		<result column="COLUMNNAME" property="columnName"></result>
		<result column="DATATYPE" property="dataType"></result>
		<result column="COLUMNCOMMENT" property="columnComment"></result>
		<result column="COLUMNKEY" property="columnKey"></result>
		<result column="EXTRA" property="extra"></result>
		<result column="CREATETIME" property="createTime"></result>
	</resultMap>

	<select id="queryList" resultMap="tableMap">
		select dt.table_name tableName,
		dtc.comments tableComment,
		uo.created createTime
		from user_tables dt,
		user_tab_comments dtc,
		user_objects uo
		where dt.table_name = dtc.table_name and dt.table_name = uo.object_name and uo.object_type='TABLE'
		<if test="tableName != null and tableName.trim() != ''">
			and dt.table_name like concat('%', UPPER(#{tableName}))
		</if>
		order by uo.CREATED desc
	</select>

	<select id="queryTable" resultMap="tableMap">
		select dt.table_name tableName,dtc.comments tableComment,dt.last_analyzed createTime from user_tables dt,user_tab_comments dtc where dt.table_name=dtc.table_name and dt.table_name = UPPER(#{tableName})
	</select>

	<select id="queryColumns" resultMap="tableMap">
  		select temp.column_name columnname,
			   temp.data_type dataType,
			   temp.comments columnComment,
			   case temp.constraint_type
				   when 'P' then
					   'PRI'
				   when 'C' then
					   'UNI'
				   else
					   ''
				   end "COLUMNKEY",
			   '' "EXTRA"
		from (select col.column_id,
					 col.column_name,
					 DECODE(upper(col.data_type),
							upper('Number'),
							DECODE(col.DATA_SCALE,
								   0,
								   DECODE(sign(col.DATA_PRECISION - 18),
										  1,
										  upper('DECIMAL'),
										  DECODE(sign(col.DATA_PRECISION - 9),
												 1,
												 upper('int64'),
												 DECODE(sign(col.DATA_PRECISION - 4),
														1,
														upper('int32'),
														upper('int16')))),
								   upper('DECIMAL')),
							col.data_type) as data_type,
					 colc.comments,
					 uc.constraint_type,
					 -- 去重
					 row_number() over(partition by col.column_name order by uc.constraint_type desc) as row_flg
			  from user_tab_columns col
					   left join user_col_comments colc
								 on colc.table_name = col.table_name
									 and colc.column_name = col.column_name
					   left join user_cons_columns ucc
								 on ucc.table_name = col.table_name
									 and ucc.column_name = col.column_name
					   left join user_constraints uc
								 on uc.constraint_name = ucc.constraint_name
			  where col.table_name = upper(#{tableName})) temp
		where temp.row_flg = 1
		order by temp.column_id
	</select>

</mapper>