原 GreenPlum中的union可能比union all要快很多

2024年8月12日

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👉 本文共约1317个字，系统预计阅读时间或需5分钟。

现象
分析
优化手段
SQL调优1：将union all修改为union
SQL调优2：使用PG的优化器，而不使用GPORCA优化器
全库整体配置timeout
总结

现象

项目上反馈说，系统很卡慢，我登陆gpcc上查看，发现有很多SQL跑了2天还没跑完，其SQL语句基本都是同一条：

SQL语句格式，是一条由UNION ALL组成的SQL，内容较复杂：

SELECT DISTINCT
a.ENCDEFBTER_ID || '_MZ' AS xh,
a.HDFPITAL_SOID AS yljgdm,
a.ENCDEFBTER_ID AS jzlsh,
a.PERSON_ID AS patid,
a.ENCDEFBTER_TYPE_NO AS jzlb,
a.ENCDEFBTER_ID || '_MZ' AS yjlxh,
a.ENCDEFBTER_ID || '_MZ' AS zyjlxh,
b.FULL_NAME AS hzxm,
COALESCE(b.OMRN, '-') AS mjzh,
'NA' AS zyh,
CASE WHEN b.GENDER_NAME = '男' THEN '1' WHEN b.GENDER_NAME = '女' THEN '2' ELSE COALESCE(b.GENDER_NO, 'NA') END AS xbdm,
COALESCE(b.GENDER_NAME, 'NA') AS xbmc,
COALESCE(b.IDENTITY_NO, '-') AS sfzhm,
COALESCE(LEFT(b.IDCARD_NO, 18), '-') AS jkkh,
'NA' AS aboxxdm,
'NA' AS aboxxmc,
'NA' AS rhxxdm,
'NA' AS rhxxmc,
COALESCE(sxs.ABC_PLAIN_TEXT, 'NA') AS sxs,
COALESCE(grs.ABC_PLAIN_TEXT, 'NA') AS grs,
COALESCE(yjs.ABC_PLAIN_TEXT, 'NA') AS yjs,
COALESCE(jbs.ABC_PLAIN_TEXT, 'NA') AS jbs,
COALESCE(yfjzs.ABC_PLAIN_TEXT, 'NA') AS yfjzs,
COALESCE(gms.ABC_PLAIN_TEXT, 'NA') AS gms,
COALESCE(hys.ABC_PLAIN_TEXT, 'NA') AS hys,
COALESCE(sss.ABC_PLAIN_TEXT, 'NA') AS sss,
COALESCE(crbs.ABC_PLAIN_TEXT, 'NA') AS crbs,
COALESCE(jzs.ABC_PLAIN_TEXT, 'NA') AS jzs,
a.SYS_SOID AS sys_id,
a.CREATED_AT AS gdsj,
NOW() AS sjscsj,
'0' AS pcxh
FROM OUTP_ENCDEFBTER a
INNER JOIN outp_record b ON a.ENCDEFBTER_ID = b.ENCDEFBTER_ID
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE ABC_NAME = '输血史'
) sxs ON sxs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND sxs.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE ABC_NAME = '个人史'
) grs ON grs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND grs.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE seq_no = '6'
) yjs ON yjs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND yjs.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE seq_no = '5'
) jbs ON jbs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND jbs.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE ABC_NAME = '预防接种史'
) yfjzs ON yfjzs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND yfjzs.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE seq_no = '4'
) gms ON gms.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND gms.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE ABC_NAME = '婚育史'
) hys ON hys.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND hys.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE ABC_NAME = '手术史'
) sss ON sss.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND sss.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE ABC_NAME = '传染病史'
) crbs ON crbs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND crbs.rk = 1
LEFT JOIN (
    SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk
    FROM OUTP_ABC WHERE seq_no = '3'
) jzs ON jzs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND jzs.rk = 1
WHERE a.CREATED_AT BETWEEN '2024-08-12 11:06:49' AND '2099-12-31'

UNION ALL

SELECT DISTINCT
a.ENCDEFBTER_ID || '_ZY' AS xh,
a.HDFPITAL_SOID AS yljgdm,
a.ENCDEFBTER_ID AS jzlsh,
a.PERSON_ID AS patid,
a.ENCDEFBTER_TYPE_NO AS jzlb,
a.ENCDEFBTER_ID || '_ZY' AS yjlxh,
a.ENCDEFBTER_ID || '_ZY' AS zyjlxh,
b.FULL_NAME AS hzxm,
'NA' AS mjzh,
COALESCE(b.IMRN, '-') AS zyh,
CASE WHEN b.GENDER_NAME = '男' THEN '1' WHEN b.GENDER_NAME = '女' THEN '2' ELSE COALESCE(b.GENDER_NO, 'NA') END AS xbdm,
COALESCE(b.GENDER_NAME, 'NA') AS xbmc,
COALESCE(b.IDENTITY_NO, '-') AS sfzhm,
COALESCE(LEFT(b.IDCARD_NO, 18), '-') AS jkkh,
'NA' AS aboxxdm,
'NA' AS aboxxmc,
'NA' AS rhxxdm,
'NA' AS rhxxmc,
COALESCE(sxs.ABC_PLAIN_TEXT, 'NA') AS sxs,
COALESCE(grs.ABC_PLAIN_TEXT, 'NA') AS grs,
COALESCE(yjs.ABC_PLAIN_TEXT, 'NA') AS yjs,
COALESCE(jbs.ABC_PLAIN_TEXT, 'NA') AS jbs,
COALESCE(yfjzs.ABC_PLAIN_TEXT, 'NA') AS yfjzs,
COALESCE(gms.ABC_PLAIN_TEXT, 'NA') AS gms,
COALESCE(hys.ABC_PLAIN_TEXT, 'NA') AS hys,
COALESCE(sss.ABC_PLAIN_TEXT, 'NA') AS sss,
COALESCE(crbs.ABC_PLAIN_TEXT, 'NA') AS crbs,
COALESCE(jzs.ABC_PLAIN_TEXT, 'NA') AS jzs,
a.SYS_SOID AS sys_id,
a.MODIFIED_AT AS gdsj,
NOW() AS sjscsj,
'0' AS pcxh
FROM INP_ENCDEFBTER a
INNER JOIN inp_record b ON a.ENCDEFBTER_ID = b.ENCDEFBTER_ID
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE ABC_NAME = '输血史'
) sxs ON sxs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND sxs.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE ABC_NAME = '个人史'
) grs ON grs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND grs.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE seq_no = '6'
) yjs ON yjs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND yjs.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE seq_no = '5'
) jbs ON jbs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND jbs.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE ABC_NAME = '预防接种史'
) yfjzs ON yfjzs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND yfjzs.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE seq_no = '4'
) gms ON gms.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND gms.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE ABC_NAME = '婚育史'
) hys ON hys.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND hys.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE ABC_NAME = '手术史'
) sss ON sss.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND sss.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE ABC_NAME = '传染病史'
) crbs ON crbs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND crbs.rk = 1
LEFT JOIN (
    SELECT INP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY INP_ABC_ID DESC) AS rk
    FROM INP_ABC WHERE seq_no = '3'
) jzs ON jzs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND jzs.rk = 1
WHERE a.MODIFIED_AT BETWEEN '2024-08-12 11:06:49' AND '2099-12-31'

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SELECT DISTINCT

a.ENCDEFBTER_ID || '_MZ' AS xh,

a.HDFPITAL_SOID AS yljgdm,

a.ENCDEFBTER_ID AS jzlsh,

a.PERSON_ID AS patid,

a.ENCDEFBTER_TYPE_NO AS jzlb,

a.ENCDEFBTER_ID || '_MZ' AS yjlxh,

a.ENCDEFBTER_ID || '_MZ' AS zyjlxh,

b.FULL_NAME AS hzxm,

COALESCE(b.OMRN, '-') AS mjzh,

'NA' AS zyh,

CASE WHEN b.GENDER_NAME = '男' THEN '1' WHEN b.GENDER_NAME = '女' THEN '2' ELSE COALESCE(b.GENDER_NO, 'NA') END AS xbdm,

COALESCE(b.GENDER_NAME, 'NA') AS xbmc,

COALESCE(b.IDENTITY_NO, '-') AS sfzhm,

COALESCE(LEFT(b.IDCARD_NO, 18), '-') AS jkkh,

'NA' AS aboxxdm,

'NA' AS aboxxmc,

'NA' AS rhxxdm,

'NA' AS rhxxmc,

COALESCE(sxs.ABC_PLAIN_TEXT, 'NA') AS sxs,

COALESCE(grs.ABC_PLAIN_TEXT, 'NA') AS grs,

COALESCE(yjs.ABC_PLAIN_TEXT, 'NA') AS yjs,

COALESCE(jbs.ABC_PLAIN_TEXT, 'NA') AS jbs,

COALESCE(yfjzs.ABC_PLAIN_TEXT, 'NA') AS yfjzs,

COALESCE(gms.ABC_PLAIN_TEXT, 'NA') AS gms,

COALESCE(hys.ABC_PLAIN_TEXT, 'NA') AS hys,

COALESCE(sss.ABC_PLAIN_TEXT, 'NA') AS sss,

COALESCE(crbs.ABC_PLAIN_TEXT, 'NA') AS crbs,

COALESCE(jzs.ABC_PLAIN_TEXT, 'NA') AS jzs,

a.SYS_SOID AS sys_id,

a.CREATED_AT AS gdsj,

NOW() AS sjscsj,

'0' AS pcxh

FROM OUTP_ENCDEFBTER a

INNER JOIN outp_record b ON a.ENCDEFBTER_ID = b.ENCDEFBTER_ID

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE ABC_NAME = '输血史'

) sxs ON sxs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND sxs.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE ABC_NAME = '个人史'

) grs ON grs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND grs.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE seq_no = '6'

) yjs ON yjs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND yjs.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE seq_no = '5'

) jbs ON jbs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND jbs.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE ABC_NAME = '预防接种史'

) yfjzs ON yfjzs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND yfjzs.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE seq_no = '4'

) gms ON gms.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND gms.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE ABC_NAME = '婚育史'

) hys ON hys.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND hys.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE ABC_NAME = '手术史'

) sss ON sss.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND sss.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE ABC_NAME = '传染病史'

) crbs ON crbs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND crbs.rk = 1

LEFT JOIN (

SELECT OUTP_ABC_ID, ABC_PLAIN_TEXT, ENCDEFBTER_ID, row_number() OVER (PARTITION BY ENCDEFBTER_ID ORDER BY OUTP_ABC_ID DESC) AS rk

FROM OUTP_ABC WHERE seq_no = '3'

) jzs ON jzs.ENCDEFBTER_ID = a.ENCDEFBTER_ID AND jzs.rk = 1

WHERE a.CREATED_AT BETWEEN '2024-08-12 11:06:49' AND '2099-12-31'

UNION ALL

SELECT DISTINCT

a.ENCDEFBTER_ID || '_ZY' AS xh,

a.HDFPITAL_SOID AS yljgdm,

a.ENCDEFBTER_ID AS jzlsh,

a.PERSON_ID AS patid,

a.ENCDEFBTER_TYPE_NO AS jzlb,

a.ENCDEFBTER_ID || '_ZY' AS yjlxh,

a.ENCDEFBTER_ID || '_ZY' AS zyjlxh,

b.FULL_NAME AS hzxm,

'NA' AS mjzh,

COALESCE(b.IMRN, '-') AS zyh,

CASE WHEN b.GENDER_NAME = '男' THEN '1' WHEN b.GENDER_NAME = '女' THEN '2' ELSE COALESCE(b.GENDER_NO, 'NA') END AS xbdm,

COALESCE(b.GENDER_NAME, 'NA') AS xbmc,

COALESCE(b.IDENTITY_NO, '-') AS sfzhm,

COALESCE(LEFT(b.IDCARD_NO, 18), '-') AS jkkh,

'NA' AS aboxxdm,

'NA' AS aboxxmc,

'NA' AS rhxxdm,

'NA' AS rhxxmc,

COALESCE(sxs.ABC_PLAIN_TEXT, 'NA') AS sxs,

COALESCE(grs.ABC_PLAIN_TEXT, 'NA') AS grs,

COALESCE(yjs.ABC_PLAIN_TEXT, 'NA') AS yjs,

COALESCE(jbs.ABC_PLAIN_TEXT, 'NA') AS jbs,

COALESCE(yfjzs.ABC_PLAIN_TEXT, 'NA') AS yfjzs,

COALESCE(gms.ABC_PLAIN_TEXT, 'NA') AS gms,

COALESCE(hys.ABC_PLAIN_TEXT, 'NA') AS hys,

COALESCE(sss.ABC_PLAIN_TEXT, 'NA') AS sss,

COALESCE(crbs.ABC_PLAIN_TEXT, 'NA') AS crbs,

COALESCE(jzs.ABC_PLAIN_TEXT, 'NA') AS jzs,

a.SYS_SOID AS sys_id,

a.MODIFIED_AT AS gdsj,

NOW() AS sjscsj,

'0' AS pcxh

FROM INP_ENCDEFBTER a

INNER JOIN inp_record b ON a.ENCDEFBTER_ID = b.ENCDEFBTER_ID

LEFT JOIN (