103 lines
4.6 KiB
SQL
103 lines
4.6 KiB
SQL
----------------------------------------------------------------------------------------
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--
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-- File name: cs_spch_create.sql
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--
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-- Purpose: Create a SQL Patch for given SQL_ID
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--
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-- Author: Carlos Sierra
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--
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-- Version: 2023/04/27
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--
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-- Usage: Connecting into PDB.
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--
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-- Enter SQL_ID and PLAN_HASH_VALUE when requested.
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--
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-- Example: $ sqlplus / as sysdba
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-- SQL> @cs_spch_create.sql
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--
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-- Notes: Accesses AWR data thus you must have an Oracle Diagnostics Pack License.
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--
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-- Developed and tested on 12.1.0.2.
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--
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-- Other less common CBO Hints:
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-- ~~~~~~~~~~~~~~~~~~~~~~~~~~~
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-- OPT_PARAM('_b_tree_bitmap_plans' 'FALSE') OPT_PARAM('_no_or_expansion' 'TRUE')
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-- CARDINALITY(T 1)
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-- OPT_ESTIMATE(TABLE T ROWS=1) e.g.: OPT_ESTIMATE(@SEL$1 TABLE REPLICATION_LOG_V2 ROWS=1000000)
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-- BIND_AWARE
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-- PUSH_PRED(@SEL$XXXXXXXX)
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-- NO_EXPAND
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--
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-- OPT_PARAM('_optimizer_unnest_all_subqueries' 'FALSE') -- DBPERF-6362 DNSVCNAPI cqhcc9c504qk5 getValues(INTERNAL_ZONES,ZoneIdIndex) after removing redundant predicate
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-- OPT_PARAM('_unnest_subquery' 'FALSE') -- DBPERF-6362 DNSVCNAPI cqhcc9c504qk5 getValues(INTERNAL_ZONES,ZoneIdIndex) after removing redundant predicate
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-- OPT_PARAM('_first_k_rows_dynamic_proration' 'FALSE') -- DBPERF-6362 DNSVCNAPI cqhcc9c504qk5 getValues(INTERNAL_ZONES,ZoneIdIndex) after removing redundant predicate
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-- OPT_PARAM('_optim_peek_user_binds' 'FALSE') -- DBPERF-8653 Suboptimal performance on a query with range predicate on column where all rows have same prefix on leading 56 characters 9sjq5yhu22678 performScanQuery(instanceConfigEvents,HashRangeIndex)
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--
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-- Fix Control CBO Hints:
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-- ~~~~~~~~~~~~~~~~~~~~~
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-- OPT_PARAM('_fix_control' '9550277:ON') -- DBPERF-8595 9550277 Use Column Groups Selectivity and do not load Column Histogram Statistics
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-- OPT_PARAM('_fix_control' '5922070:OFF') -- DBPERF-5188 DBPERF-5443 DBPERF-5475 DBPERF-5513 DBPERF-5839 DBPERF-5881 DBPERF-6264 DBPERF-6302 DBPERF-6337 DBPERF-84 DBPERF-262 DBPERFOCI-54 IOD-31530 IOD-34530 WFAAS-5928 ... 5922070: NO COLUMN EQUIVALENCE BASED ON EQUIJOIN IS DONE IN STMT WITH GROUP BY
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-- OPT_PARAM('_fix_control' '21971099:OFF') -- DBPERF-5204 NAT_GATEWAY 9tbzxxg29px0p performScanQuery(RETRY_TOKENS,HashRangeIndex) 21971099: WRONG CARDINALITY FROM SQL ANALYTIC WINDOWS FUNCTIONS
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-- OPT_PARAM('_fix_control' '13321547:OFF') -- 13321547: ANALYTICAL QUERY WINDOW SORT
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-- OPT_PARAM('_fix_control' '6674254:OFF') -- DBPERF-6362 DNSVCNAPI cqhcc9c504qk5 getValues(INTERNAL_ZONES,ZoneIdIndex) after removing redundant predicate 6674254: FIRST_ROWS(X) HINT CAUSING BAD PLAN
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---------------------------------------------------------------------------------------
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--
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@@cs_internal/cs_primary.sql
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@@cs_internal/cs_cdb_warn.sql
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@@cs_internal/cs_set.sql
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@@cs_internal/cs_def.sql
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@@cs_internal/cs_file_prefix.sql
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--
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DEF cs_script_name = 'cs_spch_create';
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--
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PRO 1. SQL_ID:
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DEF cs_sql_id = "&1.";
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UNDEF 1;
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--
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SELECT '&&cs_file_prefix._&&cs_script_name._&&cs_sql_id.' cs_file_name FROM DUAL;
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--
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@@cs_internal/cs_signature.sql
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@@cs_internal/&&cs_zapper_managed.
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--
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@@cs_internal/cs_plans_performance.sql
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@@cs_internal/cs_spch_internal_list.sql
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--
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COL default_hints_text NEW_V default_hints_text NOPRI;
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SELECT q'[&&hints_text.]'||CASE WHEN '&&cs_kiev_table_name.' IS NOT NULL THEN ' LEADING(@SEL$1 &&cs_kiev_table_name.)' END||q'[ OPT_PARAM('_b_tree_bitmap_plans' 'FALSE') OPT_PARAM('_no_or_expansion' 'TRUE')]' AS default_hints_text FROM DUAL;
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PRO
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PRO To enhance diagnostics: MONITOR GATHER_PLAN_STATISTICS
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PRO
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PRO For most KIEV scans use default: &&default_hints_text.
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PRO
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PRO 2. CBO_HINT(S):
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DEF hints_text = "&2.";
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UNDEF 2;
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COL hints_text NEW_V hints_text NOPRI;
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SELECT NVL(q'[&&hints_text.]', q'[&&default_hints_text.]') AS hints_text FROM DUAL;
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--
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@@cs_internal/cs_spool_head.sql
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PRO SQL> @&&cs_script_name..sql "&&cs_sql_id." "&&hints_text."
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@@cs_internal/cs_spool_id.sql
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@@cs_internal/cs_spool_id_list_sql_id.sql
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--
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PRO CBO HINTS : "&&hints_text."
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--
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@@cs_internal/cs_print_sql_text.sql
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-- drop existing patch if any
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@@cs_internal/cs_spch_internal_drop.sql
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--
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PRO
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PRO Create name: "spch_&&cs_sql_id."
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@@cs_internal/cs_spch_internal_create.sql
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--
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@@cs_internal/cs_spch_internal_list.sql
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PRO
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PRO SQL> @&&cs_script_name..sql "&&cs_sql_id." "&&hints_text."
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--
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@@cs_internal/cs_spool_tail.sql
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@@cs_internal/cs_undef.sql
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@@cs_internal/cs_reset.sql
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--
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