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Add context menu to display database tables stats (#639)

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* Add context menu to display database tables stats

* Move table stats implementation into client
This commit is contained in:
Dan Sosedoff
2023-01-23 14:10:26 -06:00
committed by GitHub
parent 06212b4c34
commit 5b2d4e4454
8 changed files with 94 additions and 0 deletions
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44
pkg/statements/sql/tables_stats.sql Normal file
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WITH columns_counts AS (
SELECT table_schema, table_name, COUNT(1) AS num
FROM information_schema.columns
GROUP BY table_schema, table_name
),
indexes_counts AS (
SELECT schemaname, tablename, COUNT(1) AS num
FROM pg_indexes
GROUP BY schemaname, tablename
)
SELECT
tables.schemaname AS schema_name,
tables.relname AS table_name,
pg_size_pretty(pg_total_relation_size(tables.relid)) AS total_size,
pg_size_pretty(pg_relation_size(tables.relid)) AS data_size,
pg_size_pretty(pg_indexes_size(tables.relid)) AS index_size,
pg_class.reltuples AS estimated_rows_count,
CASE
WHEN pg_class.reltuples >= 0 AND pg_class.reltuples < 1000
THEN pg_class.reltuples::text
WHEN pg_class.reltuples >= 1000 AND pg_class.reltuples < 1000000
THEN ROUND((pg_class.reltuples / 1000))::text || 'K'
WHEN pg_class.reltuples >= 1000000
THEN ROUND(pg_class.reltuples / 1000000)::text || 'M'
END AS estimated_rows,
CASE
WHEN pg_class.reltuples > 1000
THEN ROUND(pg_indexes_size(tables.relid)::numeric / pg_relation_size(tables.relid), 2)
END AS index_to_data_ratio,
indexes_counts.num AS indexes_count,
columns_counts.num AS columns_count
FROM
pg_catalog.pg_statio_user_tables AS tables
LEFT JOIN pg_class
ON pg_class.oid = tables.relid
LEFT JOIN indexes_counts
ON indexes_counts.schemaname = tables.schemaname
AND indexes_counts.tablename = tables.relname
LEFT JOIN columns_counts
ON columns_counts.table_schema = tables.schemaname
AND columns_counts.table_name = tables.relname
ORDER BY
pg_total_relation_size(tables.relid) DESC,
pg_relation_size(tables.relid) DESC