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----------------------------------------------------------------------------------------
--
-- File name: cs_index_usage.sql
--
-- Purpose: Index Usage (is an index still in use?)
--
-- Author: Carlos Sierra
--
-- Version: 2023/01/09
--
-- Usage: Execute connected to PDB
--
-- Enter owner, table and index
--
-- Example: $ sqlplus / as sysdba
-- SQL> @cs_index_usage.sql
--
-- Notes: Developed and tested on 12.1.0.2.
--
---------------------------------------------------------------------------------------
--
@@cs_internal/cs_primary.sql
@@cs_internal/cs_cdb_warn.sql
@@cs_internal/cs_set.sql
@@cs_internal/cs_def.sql
@@cs_internal/cs_file_prefix.sql
--
DEF cs_script_name = 'cs_index_usage';
--
COL username FOR A30;
SELECT username
FROM dba_users
WHERE oracle_maintained = 'N'
AND common = 'NO'
ORDER BY
username
/
PRO
PRO 1. Table Owner:
DEF table_owner = '&1.';
UNDEF 1;
COL p_owner NEW_V p_owner FOR A30 NOPRI;
SELECT username AS p_owner
FROM dba_users
WHERE oracle_maintained = 'N'
AND common = 'NO'
AND username = UPPER(TRIM('&&table_owner.'))
AND ROWNUM = 1
/
--
COL table_name FOR A30;
SELECT table_name, blocks, num_rows
FROM dba_tables
WHERE owner = '&&p_owner.'
ORDER BY
table_name
/
PRO
PRO 2. Table Name:
DEF table_name = '&2.';
UNDEF 2;
COL p_table_name NEW_V p_table_name NOPRI;
SELECT table_name AS p_table_name
FROM dba_tables
WHERE owner = '&&p_owner.'
AND table_name = UPPER(TRIM('&&table_name.'))
AND ROWNUM = 1
/
--
COL index_name FOR A30;
SELECT index_name, leaf_blocks
FROM dba_indexes
WHERE owner = '&&p_owner.'
AND table_name = '&&p_table_name.'
ORDER BY
index_name
/
PRO
PRO 3. Index Name:
DEF index_name = '&3.'
UNDEF 3;
DEF p_index_name = '';
COL p_index_name NEW_V p_index_name NOPRI;
SELECT index_name AS p_index_name
FROM dba_indexes
WHERE owner = '&&p_owner.'
AND table_name = '&&p_table_name.'
AND index_name = UPPER(TRIM('&&index_name.'))
AND ROWNUM = 1
/
--
SELECT '&&cs_file_prefix._&&cs_script_name._&&p_owner..&&p_table_name..&&p_index_name.' cs_file_name FROM DUAL;
--
@@cs_internal/cs_spool_head.sql
PRO SQL> @&&cs_script_name..sql "&&p_owner." "&&p_table_name." "&&p_index_name."
@@cs_internal/cs_spool_id.sql
--
PRO TABLE_OWNER : "&&p_owner."
PRO TABLE_NAME : "&&p_table_name."
PRO INDEX_NAME : "&&p_index_name."
--
COL index_name FOR A30;
COL plan_hash_value FOR 999999999999999;
COL executions FOR 999,999,999,990;
COL elapsed_seconds FOR 999,999,990;
COL cpu_seconds FOR 999,999,990;
COL sql_text FOR A100 TRUNC;
BREAK ON REPORT;
COMPUTE SUM LABEL "TOTAL" OF executions elapsed_seconds cpu_seconds ON REPORT;
PRO
PRO v$object_dependency -> v$sql
PRO ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SELECT d.to_name AS index_name, s.sql_id, s.plan_hash_value, s.sql_text,
s.executions, s.elapsed_seconds, s.cpu_seconds, s.last_active_time
FROM ( SELECT d.to_name, d.from_hash, d.from_address
FROM v$object_dependency d, v$db_object_cache c
WHERE d.to_owner = '&&p_owner.'
AND d.to_name = NVL('&&p_index_name.', d.to_name)
--AND d.to_type = 70 -- MULTI-VERSIONED OBJECT
AND d.to_name IN (SELECT index_name FROM dba_indexes WHERE owner = '&&p_owner.' AND table_name = '&&p_table_name.')
AND c.hash_value = d.to_hash
AND c.addr = d.to_address
AND c.type = 'MULTI-VERSIONED OBJECT'
GROUP BY d.to_name, d.from_hash, d.from_address
) d
CROSS APPLY (
SELECT s.sql_id, s.sql_text, s.plan_hash_value,
SUM(s.executions) AS executions,
ROUND(SUM(s.elapsed_time)/POWER(10, 6)) AS elapsed_seconds,
ROUND(SUM(s.cpu_time)/POWER(10, 6)) AS cpu_seconds,
MAX(s.last_active_time) AS last_active_time
FROM v$sql s
WHERE s.hash_value = d.from_hash
AND s.address = d.from_address
-- AND s.parsing_user_id <> 0
-- AND s.parsing_schema_id <> 0
GROUP BY
s.sql_id, s.sql_text, s.plan_hash_value
) s
ORDER BY
d.to_name, s.sql_id, s.plan_hash_value
/
PRO
PRO v$sql_plan -> v$sql
PRO ~~~~~~~~~~~~~~~~~~~
SELECT p.object_name AS index_name, p.sql_id, p.plan_hash_value, s.sql_text,
s.executions, s.elapsed_seconds, s.cpu_seconds, s.last_active_time
FROM ( SELECT p.object_name, p.sql_id, p.plan_hash_value
FROM v$sql_plan p
WHERE p.object_owner = '&&p_owner.'
AND p.object_name = NVL('&&p_index_name.', p.object_name)
AND p.object_type LIKE '%INDEX%'
AND p.object_name IN (SELECT index_name FROM dba_indexes WHERE owner = '&&p_owner.' AND table_name = '&&p_table_name.')
GROUP BY p.object_name, p.sql_id, p.plan_hash_value
) p
CROSS APPLY (
SELECT MAX(s.sql_text) AS sql_text,
SUM(s.executions) AS executions,
ROUND(SUM(s.elapsed_time)/POWER(10, 6)) AS elapsed_seconds,
ROUND(SUM(s.cpu_time)/POWER(10, 6)) AS cpu_seconds,
MAX(s.last_active_time) AS last_active_time
FROM v$sql s
WHERE s.sql_id = p.sql_id
AND s.plan_hash_value = p.plan_hash_value
-- AND s.parsing_user_id <> 0
-- AND s.parsing_schema_id <> 0
) s
ORDER BY
p.object_name, s.sql_id, s.plan_hash_value
/
PRO
PRO dba_hist_sql_plan -> dba_hist_sqltext
PRO ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
SELECT p.object_name AS index_name, p.sql_id, p.plan_hash_value, s.sql_text, p.timestamp
FROM ( SELECT p.object_name, p.sql_id, p.plan_hash_value, MAX(timestamp) AS timestamp
FROM dba_hist_sql_plan p
WHERE p.object_owner = '&&p_owner.'
AND p.object_name = NVL('&&p_index_name.', p.object_name)
AND p.object_type LIKE '%INDEX%'
AND p.dbid = TO_NUMBER('&&cs_dbid.')
AND p.object_name IN (SELECT index_name FROM dba_indexes WHERE owner = '&&p_owner.' AND table_name = '&&p_table_name.')
GROUP BY p.object_name, p.sql_id, p.plan_hash_value
) p
CROSS APPLY (
SELECT MAX(DBMS_LOB.SUBSTR(s.sql_text, 1000)) AS sql_text
FROM dba_hist_sqltext s
WHERE s.sql_id = p.sql_id
) s
ORDER BY
p.object_name, p.sql_id, p.plan_hash_value
/
--
PRO
PRO SQL> @&&cs_script_name..sql "&&p_owner." "&&p_table_name." "&&p_index_name."
--
@@cs_internal/cs_spool_tail.sql
@@cs_internal/cs_undef.sql
@@cs_internal/cs_reset.sql
--