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fail-cleanup-db.sh: cleanup unused DB entries

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This script removes dangling rows from the database, for example
'trace' entries with a variant_id not mentioned in the 'variants'
table, or result rows referencing a nonexistent 'fsppilot' entry.
IOW, this script enforces referential integrity as it would be
maintained by foreign key constraints (that can only be used with
InnoDB tables).

Change-Id: I4dce1e46277d470f8c3eca31447ca71f63c6353f
This commit is contained in:
Horst Schirmeier
2014-11-05 17:20:27 +01:00
parent 80da913264
commit 722715c01f
1 changed files with 149 additions and 0 deletions
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scripts/fail-cleanup-db.sh Executable file
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#!/bin/bash
#
# This script removes dangling rows from the database, for example 'trace'
# entries with a variant_id not mentioned in the 'variants' table, or result
# rows referencing a nonexistent 'fsppilot' entry. IOW, this script enforces
# referential integrity as it would be maintained by foreign key constraints
# (that can only be used with InnoDB tables).
#
if [ -z "$1" -o -z "$2" ]
then
echo "usage: $0 dbname resulttable" >&2
exit 1
fi
DB=$1
RESULT=$2
MYSQL=mysql
function table_exists()
{
N=$(echo "SHOW TABLES LIKE '$1'" | $MYSQL $DB | wc -l)
[ $N -gt 0 ]
return
}
if table_exists trace
then
echo -n "removing widowed entries in trace ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE FROM trace
WHERE variant_id NOT IN
(SELECT id FROM variant);
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists fsppilot
then
echo -n "removing widowed entries in fsppilot ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE p FROM fsppilot p
LEFT JOIN trace t
ON p.variant_id = t.variant_id
AND p.instr2 = t.instr2
AND p.data_address = t.data_address
WHERE t.variant_id IS NULL;
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists fspgroup
then
echo -n "removing widowed entries in fspgroup ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE g FROM fspgroup g
LEFT JOIN fsppilot p
ON g.pilot_id = p.id
WHERE p.id IS NULL;
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists $RESULT
then
echo -n "removing widowed entries in $RESULT ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE r FROM $RESULT r
LEFT JOIN fsppilot p
ON r.pilot_id = p.id
WHERE p.id IS NULL;
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists objdump
then
echo -n "removing widowed entries in objdump ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE FROM objdump
WHERE variant_id NOT IN
(SELECT id FROM variant);
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists fulltrace
then
echo -n "removing widowed entries in fulltrace ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE FROM fulltrace
WHERE variant_id NOT IN
(SELECT id FROM variant);
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists dbg_source
then
echo -n "removing widowed entries in dbg_source ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE FROM dbg_source
WHERE variant_id NOT IN
(SELECT id FROM variant);
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists dbg_filename
then
echo -n "removing widowed entries in dbg_filename ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE FROM dbg_filename
WHERE variant_id NOT IN
(SELECT id FROM variant);
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
if table_exists dbg_mapping
then
echo -n "removing widowed entries in dbg_mapping ..."
echo " "$(
$MYSQL $DB <<EOT
DELETE FROM dbg_mapping
WHERE variant_id NOT IN
(SELECT id FROM variant);
SELECT ROW_COUNT() AS "deleted rows:";
EOT
)
fi
echo "done. Consider running \`mysqloptimize $DB' now."