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perf(v_ahb_diff): replace NOT EXISTS with LEFT JOIN for better query performance #225

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Merged
hf-kklein merged 1 commit into from
Dec 16, 2025
Merged

perf(v_ahb_diff): replace NOT EXISTS with LEFT JOIN for better query performance #225

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22 changes: 10 additions & 12 deletions src/fundamend/sqlmodels/create_ahb_diff_view.sql
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Original file line number Diff line number Diff line change
Expand Up @@ -128,12 +128,11 @@ FROM version_pairs vp
JOIN v_ahbtabellen new_tbl
ON new_tbl.format_version = vp.new_format_version
AND new_tbl.pruefidentifikator = vp.new_pruefidentifikator
WHERE NOT EXISTS (
SELECT 1 FROM v_ahbtabellen old_tbl
WHERE old_tbl.format_version = vp.old_format_version
AND old_tbl.pruefidentifikator = vp.old_pruefidentifikator
AND old_tbl.id_path = new_tbl.id_path
)
LEFT JOIN v_ahbtabellen old_check
ON old_check.format_version = vp.old_format_version
AND old_check.pruefidentifikator = vp.old_pruefidentifikator
AND old_check.id_path = new_tbl.id_path
WHERE old_check.id_path IS NULL

UNION ALL

Expand Down Expand Up @@ -171,9 +170,8 @@ FROM version_pairs vp
JOIN v_ahbtabellen old_tbl
ON old_tbl.format_version = vp.old_format_version
AND old_tbl.pruefidentifikator = vp.old_pruefidentifikator
WHERE NOT EXISTS (
SELECT 1 FROM v_ahbtabellen new_tbl
WHERE new_tbl.format_version = vp.new_format_version
AND new_tbl.pruefidentifikator = vp.new_pruefidentifikator
AND new_tbl.id_path = old_tbl.id_path
);
LEFT JOIN v_ahbtabellen new_check
ON new_check.format_version = vp.new_format_version
AND new_check.pruefidentifikator = vp.new_pruefidentifikator
AND new_check.id_path = old_tbl.id_path
WHERE new_check.id_path IS NULL;