Pgsql中数组字段当作查询条件和输出数组

1、博客中关于 PostgreSql Array操作的操作符和函数

https://my.oschina.net/Kenyon/blog/133974

2、官方文档：

https://www.postgresql.org/docs/9.2/functions-array.html

3、pgsql中的窗口函数

https://blog.csdn.net/xfg0218/article/details/104340898

–最后一句，提示array_agg() 在9.20 .将结果集转成数组的 array_agg()

4、关于自己的sql

select dev.name as devName,rel.id,rel.plan_id,rel.dev_id,rel.spare_ids ,ARRAY_AGG(coalesce(spare.name,''))  as spareName
from rs_maintenance_plan_dev_rel rel
left join rs_dev_info dev on dev.id=rel.dev_id
left join rs_dev_spare_part_info spare on string_to_array(spare.id,',') && rel.spare_ids::text[]where rel.plan_id='832575251038732288' group by dev.name ,rel.id,rel.plan_id,rel.dev_id,rel.spare_ids

– 结尾，最后的结果不是想要的，空的效果。{}，没加coalesce之前是{NULL}

上述sql在java-mybaties中出现问题了

&& 解析成了 and

### Error querying database.  Cause: org.postgresql.util.PSQLException: ERROR: argument of AND must be type boolean, not type text[]位置：296
### The error may exist in file [E:\etcom\work5\basic-web\target\classes\mapper\maintenance\RsMaintenancePlanDevRelMapper.xml]
### The error may involve cn.etcom.web.dao.resource.maintenance.RsMaintenancePlanDevRelMapper.selectList2-Inline
### The error occurred while setting parameters
### SQL: SELECT dev.name AS devName, rel.id, rel.plan_id, rel.dev_id, rel.spare_ids, ARRAY_AGG(coalesce(spare.name, '')) AS spareNames FROM rs_maintenance_plan_dev_rel rel LEFT JOIN rs_dev_info dev ON dev.id = rel.dev_id AND dev.tenant_id = '682230092146921472' LEFT JOIN rs_dev_spare_part_info spare ON string_to_array(spare.id, ',') AND rel.spare_ids::text[] AND spare.tenant_id = '682230092146921472' WHERE rel.plan_id = ? AND rel.tenant_id = '682230092146921472' GROUP BY dev.name, rel.id, rel.plan_id, rel.dev_id, rel.spare_ids
### Cause: org.postgresql.util.PSQLException: ERROR: argument of AND must be type boolean, not type text[]位置：296
; bad SQL grammar []; nested exception is org.postgresql.util.PSQLException: ERROR: argument of AND must be type boolean, not type text[]位置：296] with root cause
org.postgresql.util.PSQLException: ERROR: argument of AND must be type boolean, not type text[]位置：296at org.postgresql.core.v3.QueryExecutorImpl.receiveErrorResponse(QueryExecutorImpl.java:2505) ~[postgresql-42.2.9.jar:42.2.9]at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:2241) ~[postgresql-42.2.9.jar:42.2.9]at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:310) ~[postgresql-42.2.9.jar:42.2.9]at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:447) ~[postgresql-42.2.9.jar:42.2.9]at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:368) ~[postgresql-42.2.9.jar:42.2.9]

最后将 && 有交集就t 的改成包含于 <@
即：
‘& l t;@’ 最后mybatis中的sql：

<select id="selectList2" parameterType="java.lang.String" resultMap="LinkResultMap">select dev.name as devName,rel.id,rel.plan_id,rel.dev_id,rel.spare_ids ,ARRAY_AGG(coalesce(spare.name,''))  as spareNamesfrom rs_maintenance_plan_dev_rel relleft join rs_dev_info dev on dev.id=rel.dev_idleft join rs_dev_spare_part_info spare onstring_to_array(spare.id,',') /*<![CDATA[&& ]]>*/ &lt;@ rel.spare_ids::text[]where rel.plan_id=#{planId}group by dev.name ,rel.id,rel.plan_id,rel.dev_id,rel.spare_ids</select>

5、项目其他地方的应用，数据是数组字段的地方

先说引用的mybatis-plus的版本3.3.0，数据库是pgsql，pom.xml配置如下：

<dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>3.3.0</version>
</dependency>

实体类中的属性如下：

/*** 设备图片*/
@TableField(value = "icon",typeHandler = ArrayTypeHandler.class)
@ApiModelProperty(value = "设备图片")
private String[] icon;

XXmapper.xml中的resultMap中的内容如下：

<result column="icon" jdbcType="ARRAY" property="icon" typeHandler="org.apache.ibatis.type.ArrayTypeHandler" />

其他使用数组当成查询条件的如下：

<select id="selectPage2" resultMap="BaseResultMap2">select<include refid="Base_Column_List2"></include>from rs_dev_info infoleft join rs_dev_type_info typeinfo on info.dev_type_id = typeinfo.idleft join rs_dev_supplier_info sup on info.supplier = sup.idleft join rs_dev_supplier_info sup2 on info.producer = sup2.idleft join rs_area_info area on info.area_id = area.idleft join sys_dept_info dept on info.dept_id = dept.idwhere 1=1<if test="rsDevInfo.name != null and rsDevInfo.name != ''"><bind name="nameLike" value="'%' + rsDevInfo.name + '%'"/>and info.name like #{nameLike,jdbcType=VARCHAR}</if><if test="rsDevInfo.code != null and rsDevInfo.code != ''"><bind name="codeLike" value="'%' + rsDevInfo.code + '%'"/>and info.code like #{codeLike,jdbcType=VARCHAR}</if><if test="rsDevInfo.devTypeId != null and rsDevInfo.devTypeId != ''"><bind name="devTypeId" value="rsDevInfo.devTypeId"/>and info.dev_type_id = #{devTypeId}</if><if test="rsDevInfo.deviceAddr != null and rsDevInfo.deviceAddr != ''"><bind name="deviceAddr" value="'%' + rsDevInfo.deviceAddr + '%'"/>and info.device_addr like #{deviceAddr,jdbcType=VARCHAR}</if><if test="rsDevInfo.areaId != null and rsDevInfo.areaId != ''"><bind name="areaId" value="rsDevInfo.areaId"/>and info.area_id = #{areaId}</if><if test="rsDevInfo.deptId != null and rsDevInfo.deptId != ''"><bind name="deptId" value="rsDevInfo.deptId"/>and info.dept_id = #{deptId}</if><if test="rsDevInfo.supplier != null and rsDevInfo.supplier != ''"><bind name="supplier" value="rsDevInfo.supplier"/>and info.supplier = #{supplier}</if><if test="rsDevInfo.runStatus != null and rsDevInfo.runStatus != ''"><bind name="runStatus" value="rsDevInfo.runStatus"/>and info.run_status = #{runStatus}</if><if test="rsDevInfo.devIds != null">and info.id not in (<foreach collection="rsDevInfo.devIds" item="devId" separator=",">#{devId}</foreach>)</if><if test="rsDevInfo.devNo != null and rsDevInfo.devNo != ''"><bind name="devNo" value="rsDevInfo.devNo"/>and info.dev_no = #{devNo}</if>and   (string_to_array(info.area_id,',') &lt;@  (select aread_id from rs_user_area_rel where user_no=#{rsDevInfo.opUser})::text[])and   (string_to_array(info.dev_type_id,',') &lt;@  (select dev_type_id from rs_user_area_rel where user_no=#{rsDevInfo.opUser})::text[])order by info.name asc</select>

string_to_array 就是讲单个字段列，转成数组。

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