wzj-boot/ruoyi-generator/src/main/resources/mapper/generator/GenTableColumnMapper.xml

<?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.ruoyi.generator.mapper.GenTableColumnMapper">

    <resultMap type="GenTableColumn" id="GenTableColumnResult">
        <id     property="columnId"       column="column_id"      />
        <result property="tableId"        column="table_id"       />
        <result property="columnName"     column="column_name"    />
        <result property="columnComment"  column="column_comment" />
        <result property="columnType"     column="column_type"    />
        <result property="javaType"       column="java_type"      />
        <result property="javaField"      column="java_field"     />
        <result property="isPk"           column="is_pk"          />
        <result property="isIncrement"    column="is_increment"   />
        <result property="isRequired"     column="is_required"    />
        <result property="isInsert"       column="is_insert"      />
        <result property="isEdit"         column="is_edit"        />
        <result property="isList"         column="is_list"        />
        <result property="isQuery"        column="is_query"       />
        <result property="queryType"      column="query_type"     />
        <result property="htmlType"       column="html_type"      />
        <result property="dictType"       column="dict_type"      />
        <result property="sort"           column="sort"           />
        <result property="createBy"       column="create_by"      />
        <result property="createTime"     column="create_time"    />
        <result property="updateBy"       column="update_by"      />
        <result property="updateTime"     column="update_time"    />
    </resultMap>

    <select id="selectDbTableColumnsByName" parameterType="String" resultMap="GenTableColumnResult">
        <if test="@com.ruoyi.common.helper.DataBaseHelper@isMySql()">
            select column_name,
                   (case when (is_nullable = 'no' <![CDATA[ && ]]> column_key != 'PRI') then '1' else null end) as is_required,
                   (case when column_key = 'PRI' then '1' else '0' end) as is_pk,
                   ordinal_position as sort,
                   column_comment,
                   (case when extra = 'auto_increment' then '1' else '0' end) as is_increment,
                   column_type
            from information_schema.columns where table_schema = (select database()) and table_name = (#{tableName})
            order by ordinal_position
        </if>
        <if test="@com.ruoyi.common.helper.DataBaseHelper@isOracle()">
            select lower(temp.column_name) as column_name,
                    (case when (temp.nullable = 'N'  and  temp.constraint_type != 'P') then '1' else null end) as is_required,
                    (case when temp.constraint_type = 'P' then '1' else '0' end) as is_pk,
                    temp.column_id as sort,
                    temp.comments as column_comment,
                    (case when temp.constraint_type = 'P' then '1' else '0' end) as is_increment,
                    lower(temp.data_type) as column_type
            from (
                select col.column_id, col.column_name,col.nullable, col.data_type, colc.comments, uc.constraint_type, 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
        </if>
        <if test="@com.ruoyi.common.helper.DataBaseHelper@isPostgerSql()">
        </if>
        <if test="@com.ruoyi.common.helper.DataBaseHelper@isSqlServer()">
        </if>
    </select>

</mapper>