DataRepositoryMapper.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.clevergang.dbtests.repository.impl.mybatis.DataRepositoryMapper">

    <select id="findCompany" resultType="com.clevergang.dbtests.repository.api.data.Company">
        SELECT *
        FROM company
        WHERE pid = #{pid}
    </select>

    <select id="findCompanyStatic" statementType="STATEMENT"
            resultType="com.clevergang.dbtests.repository.api.data.Company">
        SELECT *
        FROM company
        WHERE pid = ${pid}
    </select>

    <select id="findDepartment" resultType="com.clevergang.dbtests.repository.api.data.Department">
        SELECT *
        FROM department
        WHERE pid = #{pid}
    </select>

    <select id="employeesWithSalaryGreaterThan" resultType="com.clevergang.dbtests.repository.api.data.Employee">
        SELECT *
        FROM employee
        WHERE salary > #{minSalary}
    </select>

    <select id="findDepartmentsOfCompany" resultType="com.clevergang.dbtests.repository.api.data.Department">
        SELECT *
        FROM department
        WHERE company_pid = #{pid}
        ORDER BY pid;
    </select>

    <select id="getProjectsWithCostsGreaterThan"
            resultType="com.clevergang.dbtests.repository.api.data.ProjectsWithCostsGreaterThanOutput">
        WITH
                project_info AS (
                    SELECT
                        project.pid  project_pid,
                        project.name project_name,
                        salary       monthly_cost,
                        company.name company_name
                    FROM project
                        JOIN projectemployee ON project.pid = projectemployee.project_pid
                        JOIN employee ON projectemployee.employee_pid = employee.pid
                        LEFT JOIN department ON employee.department_pid = department.pid
                        LEFT JOIN company ON department.company_pid = company.pid
            ),
                project_cost AS (
                    SELECT
                        project_pid,
                        sum(monthly_cost) total_cost
                    FROM project_info
                    GROUP BY project_pid
            )
        SELECT
            project_name      AS projectName,
            total_cost        AS totalCost,
            company_name      AS companyName,
            sum(monthly_cost) AS companyCost
        FROM project_info
            JOIN project_cost USING (project_pid)
        WHERE total_cost > #{totalCostBoundary}
        GROUP BY project_name, total_cost, company_name
        ORDER BY company_name
    </select>

    <insert id="insertProject" useGeneratedKeys="true" keyColumn="pid" keyProperty="pid">
        INSERT INTO project (name, datestarted)
        VALUES (#{name}, #{date})
        RETURNING pid;
    </insert>

    <update id="updateEmployee">
        UPDATE employee
        SET department_pid = #{departmentPid},
            name           = #{name},
            surname        = #{surname},
            email          = #{email},
            salary         = #{salary}
        WHERE pid = #{pid};
    </update>

    <delete id="deleteDepartments">
        Delete from department
        where pid in (
        <foreach item="item" collection="departmentsToDelete" separator=",">
            #{item.pid}
        </foreach>
        )
    </delete>

    <insert id="insertDepartment">
        INSERT INTO department (company_pid, name)
        VALUES (#{companyPid}, #{name})
        RETURNING pid
    </insert>

    <update id="updateDepartment">
        UPDATE department
        SET
            company_pid = #{companyPid},
            name        = #{name}
        WHERE pid = #{pid}
    </update>

    <select id="callRegisterEmployee" resultType="com.clevergang.dbtests.repository.api.data.RegisterEmployeeOutput">
        SELECT
            employee_id   AS employeePid,
            department_id AS departmentPid,
            company_id    AS companyPid
        FROM register_employee(#{name}, #{surname}, #{email}, #{salary}, #{departmentName}, #{companyName})
    </select>

    <select id="getProjectsCount" resultType="java.lang.Integer">
        SELECT count(*)
        FROM project
    </select>

    <select id="findEmployee" resultType="com.clevergang.dbtests.repository.api.data.Employee">
        SELECT *
        FROM employee
        WHERE pid = #{pid}
    </select>

    <select id="findProject" resultType="com.clevergang.dbtests.repository.api.data.Project">
        SELECT pid, name, datestarted as date
        FROM project
        WHERE pid = #{pid}
    </select>

    <delete id="removeProject">
        DELETE FROM project
        WHERE pid = #{pid}
    </delete>

</mapper>