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Google Keyword Rankings for : count stopkey explain plan
1
Performance Tuning » what is "count stopkey"? - OraFAQ Forum
http://www.orafaq.com/forum/t/139410/
STOPKEY occurs when you have a ROWNUM < n clause in your SQL. Look at the steps of the Explain Plan INSIDE the STOPKEY step; when these steps ...
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http://www.orafaq.com/forum/t/139410/
STOPKEY occurs when you have a ROWNUM < n clause in your SQL. Look at the steps of the Explain Plan INSIDE the STOPKEY step; when these steps ...
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2
Count (Stopkey) - Julian Dyke
http://www.juliandyke.com/Optimisation/Operations/CountStopkey.php
COUNT (STOPKEY) · Description. Indicates the limitation of the number of rows returned by using the ROWNUM pseudo-column · Versions. This operation is implemented ...
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http://www.juliandyke.com/Optimisation/Operations/CountStopkey.php
COUNT (STOPKEY) · Description. Indicates the limitation of the number of rows returned by using the ROWNUM pseudo-column · Versions. This operation is implemented ...
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3
Meaning of "COUNT STOPKEY" in explain plan — oracle-mosc
https://community.oracle.com/mosc/discussion/3458532
Hi, Could some one tell the meaning of "COUNT STOPKEY" in explain…
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https://community.oracle.com/mosc/discussion/3458532
Hi, Could some one tell the meaning of "COUNT STOPKEY" in explain…
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4
top-N query doing too much work in spite of STOPKEY ...
https://stackoverflow.com/questions/16679808/top-n-query-doing-too-much-work-in-spite-of-stopkey-optimization
This is going to be long, so here's a quick summary to draw you in: my top-N query with COUNT STOPKEY and ORDER BY STOPKEY in its plan is ...
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https://stackoverflow.com/questions/16679808/top-n-query-doing-too-much-work-in-spite-of-stopkey-optimization
This is going to be long, so here's a quick summary to draw you in: my top-N query with COUNT STOPKEY and ORDER BY STOPKEY in its plan is ...
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5
COUNT STOPKEY – NVL - OraStory - WordPress.com
https://orastory.wordpress.com/2015/02/26/count-stopkey-nvl/
COUNT STOPKEY kicks in after we have fetched the relevant rows and stops any unnecessary further execution – note in particular A-Rows ...
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https://orastory.wordpress.com/2015/02/26/count-stopkey-nvl/
COUNT STOPKEY kicks in after we have fetched the relevant rows and stops any unnecessary further execution – note in particular A-Rows ...
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6
COUNT STOPKEY ROWNUM optimization - Oracle database
https://dba4oracleapps.blogspot.com/2017/12/count-stopkey-rownum-optimization.html
Platforms affected:- all. So I was doing explain plan for below SQL on database version 11.2.0.1.0:- select * from test where rownum = 0;
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https://dba4oracleapps.blogspot.com/2017/12/count-stopkey-rownum-optimization.html
Platforms affected:- all. So I was doing explain plan for below SQL on database version 11.2.0.1.0:- select * from test where rownum = 0;
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7
Selecting ROWNUM = 1 with 100 - DB-NEMEC
http://www.db-nemec.com/Selecting_ROWNUM_1.html
See the AUTOTRACE log to verify the low resource consumption of the query: ... with ID = 5 in the execution plan; an additional COUNT STOPKEY operation.
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http://www.db-nemec.com/Selecting_ROWNUM_1.html
See the AUTOTRACE log to verify the low resource consumption of the query: ... with ID = 5 in the execution plan; an additional COUNT STOPKEY operation.
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8
Oracle execution plan operations - Use The Index, Luke
https://use-the-index-luke.com/sql/explain-plan/oracle/operations
A short reference of the most common execution plan operations of the Oracle database. ... COUNT STOPKEY. Aborts the underlying operations when the desired ...
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https://use-the-index-luke.com/sql/explain-plan/oracle/operations
A short reference of the most common execution plan operations of the Oracle database. ... COUNT STOPKEY. Aborts the underlying operations when the desired ...
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9
Tuning SQL with "rownum" filters - Burleson Consulting
http://www.dba-oracle.com/t_sql_tuning_rownum_equals_one.htm
The "hack" for SQL tuning is used to force a subquery to use an index and invoke the COUNT STOPKEY execution plan. For a simple example, consider a query to ...
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http://www.dba-oracle.com/t_sql_tuning_rownum_equals_one.htm
The "hack" for SQL tuning is used to force a subquery to use an index and invoke the COUNT STOPKEY execution plan. For a simple example, consider a query to ...
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10
Empty Blocks Affecting ROWNUM Performance
https://blog.iarsov.com/oracle/empty-blocks-affecting-rownum-performance/
... lot of empty blocks can negatively impact on the execution time. ... a predicate triggers the optimizer to use COUNT STOPKEY operation, ...
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https://blog.iarsov.com/oracle/empty-blocks-affecting-rownum-performance/
... lot of empty blocks can negatively impact on the execution time. ... a predicate triggers the optimizer to use COUNT STOPKEY operation, ...
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11
Oracle: SQL statement execution plan operations
https://renenyffenegger.ch/notes/development/databases/Oracle/SQL/statement/execution/plan/operations/index
COUNT, 1, Created by rownum . COUNT, STOPKEY, 1, rownum plus criterion (in outer query?) COUNT, 1. CREATE TABLE STATEMENT, 1 - (?). DATA LINK, FULL, 1.
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https://renenyffenegger.ch/notes/development/databases/Oracle/SQL/statement/execution/plan/operations/index
COUNT, 1, Created by rownum . COUNT, STOPKEY, 1, rownum plus criterion (in outer query?) COUNT, 1. CREATE TABLE STATEMENT, 1 - (?). DATA LINK, FULL, 1.
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12
Top N Query: How to use STOPKEY - Gavin Soorma
https://gavinsoorma.com/wp-content/uploads/2011/03/top_N_query.ppt
Producer – Consumer; Common misconceptions; Top N query; Pagination; Iteration; Index range scan; Multiple tables; Explain plan ... 2 1 COUNT (STOPKEY).
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https://gavinsoorma.com/wp-content/uploads/2011/03/top_N_query.ppt
Producer – Consumer; Common misconceptions; Top N query; Pagination; Iteration; Index range scan; Multiple tables; Explain plan ... 2 1 COUNT (STOPKEY).
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13
A dumb mistake … again and again - SAP Blogs
https://blogs.sap.com/2007/10/21/a-dumb-mistake-again-and-again/
1 0 COUNT (STOPKEY) 2 1 VIEW 3 2 SORT (ORDER BY STOPKEY) 4 3 SORT (GROUP BY) 5 4 TABLE ACCESS (FULL) OF 'T1'. The execution plan now shows ...
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https://blogs.sap.com/2007/10/21/a-dumb-mistake-again-and-again/
1 0 COUNT (STOPKEY) 2 1 VIEW 3 2 SORT (ORDER BY STOPKEY) 4 3 SORT (GROUP BY) 5 4 TABLE ACCESS (FULL) OF 'T1'. The execution plan now shows ...
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14
What I forgot and had to relearn about DESC indexes
https://mauro-pagano.com/2016/11/04/what-i-forgot-and-had-to-relearn-about-desc-indexes/
Execution plan has no SORT ORDER BY [STOPKEY in case case] thanks to the ... 0|SELECT STATEMENT | | 1| | 24| 855| |* 1| COUNT STOPKEY | | 1| ...
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https://mauro-pagano.com/2016/11/04/what-i-forgot-and-had-to-relearn-about-desc-indexes/
Execution plan has no SORT ORDER BY [STOPKEY in case case] thanks to the ... 0|SELECT STATEMENT | | 1| | 24| 855| |* 1| COUNT STOPKEY | | 1| ...
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15
SQL Optimizer for Oracle 9.3.2 - User Guide - Quest Support
https://support.quest.com/technical-documents/sql-optimizer-for-oracle/9.3.2/user-guide/welcome-to-sql-optimizer/sql-operations/sort
Execution plan image: image\Plan_Partition_Single.gif ... The SORT GROUP BY STOPKEY operation retrieves and groups rows while limiting the query to ...
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https://support.quest.com/technical-documents/sql-optimizer-for-oracle/9.3.2/user-guide/welcome-to-sql-optimizer/sql-operations/sort
Execution plan image: image\Plan_Partition_Single.gif ... The SORT GROUP BY STOPKEY operation retrieves and groups rows while limiting the query to ...
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16
Paging of Record-Sets and COUNT(STOPKEY) Optimization
https://decipherinfosys.wordpress.com/2007/08/09/paging-and-countstopkey-optimization/
from (<the query> ) x. and then it will apply the rownum filter. In Option #1, Oracle will use the COUNT(STOPKEY) optimization to find the ...
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https://decipherinfosys.wordpress.com/2007/08/09/paging-and-countstopkey-optimization/
from (<the query> ) x. and then it will apply the rownum filter. In Option #1, Oracle will use the COUNT(STOPKEY) optimization to find the ...
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17
How to get the actual execution plan for an Oracle SQL query ...
https://vladmihalcea.com/execution-plan-oracle-hibernate-query-hints/
The database component which chooses the optimal Execution Plan is called CBO ... 2 | COUNT STOPKEY | | 1 | | 30 |00:00:00.01 | 14 | | | |.
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https://vladmihalcea.com/execution-plan-oracle-hibernate-query-hints/
The database component which chooses the optimal Execution Plan is called CBO ... 2 | COUNT STOPKEY | | 1 | | 30 |00:00:00.01 | 14 | | | |.
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18
Analytic Top-N Queries
https://blog.fatalmind.com/2010/07/30/analytic-top-n-queries/index.html
Finally the limit is applied—the COUNT STOPKEY step—and the number of rows is reduced to three. The performance problem of this query is ...
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https://blog.fatalmind.com/2010/07/30/analytic-top-n-queries/index.html
Finally the limit is applied—the COUNT STOPKEY step—and the number of rows is reduced to three. The performance problem of this query is ...
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19
Fetch First vs. Rownum - Oracle Scratchpad - WordPress.com
https://jonathanlewis.wordpress.com/2020/07/15/fetch-first-vs-rownum/
With this data set I want to write a query that selects rows for class ... rownum well – notice how there is a count stopkey operation as a ...
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https://jonathanlewis.wordpress.com/2020/07/15/fetch-first-vs-rownum/
With this data set I want to write a query that selects rows for class ... rownum well – notice how there is a count stopkey operation as a ...
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20
关于COUNT STOPKEY的工作机制 - CSDN博客
https://blog.csdn.net/liqfyiyi/article/details/11225143
为了实施限定条件，优化器用count stopkey操作代替count操作，它将rownum ... SQL> explain plan for select * from emp where rownum 2 ; Explained.
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https://blog.csdn.net/liqfyiyi/article/details/11225143
为了实施限定条件，优化器用count stopkey操作代替count操作，它将rownum ... SQL> explain plan for select * from emp where rownum 2 ; Explained.
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21
Selecting index strategy for Oracle pagination query
https://dba.stackexchange.com/questions/198058/selecting-index-strategy-for-oracle-pagination-query
› questions › selecting-i...
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https://dba.stackexchange.com/questions/198058/selecting-index-strategy-for-oracle-pagination-query
› questions › selecting-i...
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22
21 The EXPLAIN PLAN Command
https://www.csee.umbc.edu/portal/help/oracle8.bak/server803/A54638_01/explan.htm
The row source count values appearing in EXPLAIN PLAN identify the number of ... A bitmap index full scan is performed if there is no start or stop key.
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https://www.csee.umbc.edu/portal/help/oracle8.bak/server803/A54638_01/explan.htm
The row source count values appearing in EXPLAIN PLAN identify the number of ... A bitmap index full scan is performed if there is no start or stop key.
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23
SQL Magic Trick: Getting Row Count Without Fetching All Rows
https://www.thatjeffsmith.com/archive/2012/02/sql-magic-trick-getting-row-count-without-fetching-all-rows/
Analytic functions are the last set of operations performed in a query except for the final ORDER BY clause. All joins and all WHERE, ...
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https://www.thatjeffsmith.com/archive/2012/02/sql-magic-trick-getting-row-count-without-fetching-all-rows/
Analytic functions are the last set of operations performed in a query except for the final ORDER BY clause. All joins and all WHERE, ...
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24
NULL's vs NOT NULL's and Performance - Connor McDonald
https://connor-mcdonald.com/2018/02/05/nulls-vs-not-nulls-and-performance/
Now I want to perform a standard pagination style query, namely, ... SELECT STATEMENT | | 5 | 2405 | 3 (0)| 00:00:01 | |* 1 | COUNT STOPKEY ...
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https://connor-mcdonald.com/2018/02/05/nulls-vs-not-nulls-and-performance/
Now I want to perform a standard pagination style query, namely, ... SELECT STATEMENT | | 5 | 2405 | 3 (0)| 00:00:01 | |* 1 | COUNT STOPKEY ...
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25
Selecting lowest value - Oracle - EXPLAIN EXTENDED
https://explainextended.com/2009/04/24/selecting-lowest-value/
Return the row with the smallest row greater than my query parameter ... SELECT STATEMENT COUNT STOPKEY VIEW TABLE ACCESS BY INDEX ROWID, ...
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https://explainextended.com/2009/04/24/selecting-lowest-value/
Return the row with the smallest row greater than my query parameter ... SELECT STATEMENT COUNT STOPKEY VIEW TABLE ACCESS BY INDEX ROWID, ...
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26
Performance tuning with NULL indexing in Oracle Database
http://arumel.com/en/performance-tuning-with-null-indexing-in-oracle-database/
It's indeed a simple query that is performed using a Full Table Scan ... STATEMENT | | 2 | 1292 | 4 (25)| 00:00:01 | |* 1 | COUNT STOPKEY ...
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http://arumel.com/en/performance-tuning-with-null-indexing-in-oracle-database/
It's indeed a simple query that is performed using a Full Table Scan ... STATEMENT | | 2 | 1292 | 4 (25)| 00:00:01 | |* 1 | COUNT STOPKEY ...
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27
Top-N Queries - ORACLE-BASE
https://oracle-base.com/articles/misc/top-n-queries
The following query shows we have 20 rows with 10 distinct values. ... 1 | VIEW | | 8 | 208 | 4 (25)| 00:00:01 | |* 2 | COUNT STOPKEY | | | | | | | 3 | VIEW ...
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https://oracle-base.com/articles/misc/top-n-queries
The following query shows we have 20 rows with 10 distinct values. ... 1 | VIEW | | 8 | 208 | 4 (25)| 00:00:01 | |* 2 | COUNT STOPKEY | | | | | | | 3 | VIEW ...
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28
New pagination method in Oracle 12c - OFFSET ... FETCH ...
https://dba-presents.com/databases/oracle/31-new-pagination-method-in-oracle-12c-offset-fetch
This query returns data but only rows from the 10th row to 19th ... It can be inferred from COUNT(STOPKEY) element in the execution plan.
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https://dba-presents.com/databases/oracle/31-new-pagination-method-in-oracle-12c-offset-fetch
This query returns data but only rows from the 10th row to 19th ... It can be inferred from COUNT(STOPKEY) element in the execution plan.
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29
Tag Archives: cbo - Oracle SQL
http://orasql.org/tag/cbo/
OJPPD: OJPPD bypassed: query block contains START WITH/CONNECT BY. ... “SORT ORDER BY STOPKEY” stores just N top records during sorting, while “WINDOW SORT ...
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http://orasql.org/tag/cbo/
OJPPD: OJPPD bypassed: query block contains START WITH/CONNECT BY. ... “SORT ORDER BY STOPKEY” stores just N top records during sorting, while “WINDOW SORT ...
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30
Top-N, Pagination Query and Optimization
https://quanwenzhao.wordpress.com/2020/02/29/top-n-pagination-query-and-optimization/
to do pagination query and never made a comparison on their execution plan, ... 1 | COUNT STOPKEY | | 1 | | 20 |00:00:00.05 | 25 | 47 |.
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https://quanwenzhao.wordpress.com/2020/02/29/top-n-pagination-query-and-optimization/
to do pagination query and never made a comparison on their execution plan, ... 1 | COUNT STOPKEY | | 1 | | 20 |00:00:00.05 | 25 | 47 |.
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31
Oracle's OFFSET .. FETCH Can be Slower than Classic ...
https://blog.jooq.org/oracles-offset-fetch-is-slower-than-classic-rownum-filtering/
And compare that to the FETCH FIRST query: ... that's what we'll expect given the low cardinalities imposed by the COUNT STOPKEY operation.
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https://blog.jooq.org/oracles-offset-fetch-is-slower-than-classic-rownum-filtering/
And compare that to the FETCH FIRST query: ... that's what we'll expect given the low cardinalities imposed by the COUNT STOPKEY operation.
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32
How to Read and Interpret an Explain Plan - Morgan's Library
https://www.morganslibrary.org/pres/lad10/peoug_xplan.pdf
What is an Explain Plan. ▫ When a SQL statement being explained the statement is not run. ▫ The optimizer chooses an execution plan.
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https://www.morganslibrary.org/pres/lad10/peoug_xplan.pdf
What is an Explain Plan. ▫ When a SQL statement being explained the statement is not run. ▫ The optimizer chooses an execution plan.
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33
How the Oracle Explain Plan Can Uncover Slow SQL Queries
https://logicalread.com/oracle-explain-plan-uncover-slow-sql-queries-h01/
IF the CBO is using an index to maintain the order, you might not see the SORT clause in the explain plan. Stop Key – has a ROWNUM listed in ...
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https://logicalread.com/oracle-explain-plan-uncover-slow-sql-queries-h01/
IF the CBO is using an index to maintain the order, you might not see the SORT clause in the explain plan. Stop Key – has a ROWNUM listed in ...
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34
SQL – Bad Execution Plan caused by ROWNUM ...
https://hoopercharles.wordpress.com/2009/12/09/sql-%E2%80%93-bad-execution-plan-caused-by-rownum-row_number-is-possible-fix/
call count cpu elapsed disk query current rows ... 1 COUNT STOPKEY (cr=66343 pr=0 pw=0 time=35132008 us) 1 VIEW (cr=66343 pr=0 pw=0 ...
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https://hoopercharles.wordpress.com/2009/12/09/sql-%E2%80%93-bad-execution-plan-caused-by-rownum-row_number-is-possible-fix/
call count cpu elapsed disk query current rows ... 1 COUNT STOPKEY (cr=66343 pr=0 pw=0 time=35132008 us) 1 VIEW (cr=66343 pr=0 pw=0 ...
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35
Cardinality - OraTechInfo.co.uk
https://www.oratechinfo.co.uk/cardinality.html
In 9i and below, this is shown as the "card" column in the explain plan ... Optimizer=HINT: FIRST_ROWS (Cost=2 Card=4 Bytes=28) 1 0 COUNT (STOPKEY) 2 1 ...
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https://www.oratechinfo.co.uk/cardinality.html
In 9i and below, this is shown as the "card" column in the explain plan ... Optimizer=HINT: FIRST_ROWS (Cost=2 Card=4 Bytes=28) 1 0 COUNT (STOPKEY) 2 1 ...
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36
guestart/Oracle-SQL-Scripts - GitHub
https://github.com/guestart/Oracle-SQL-Scripts/blob/master/sql_tuning/pagination_query_ascending_index.sql
REM This sql script uses to observe the execution plan of top-N and pagination query on Oracle ... 1 | COUNT STOPKEY | | 1 | | 20 |00:00:00.01 | 23 |.
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https://github.com/guestart/Oracle-SQL-Scripts/blob/master/sql_tuning/pagination_query_ascending_index.sql
REM This sql script uses to observe the execution plan of top-N and pagination query on Oracle ... 1 | COUNT STOPKEY | | 1 | | 20 |00:00:00.01 | 23 |.
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37
Getting first rows of a large sorted result set quickly
https://oracle-randolf.blogspot.com/2008/09/getting-first-rows-of-large-sorted.html
If the optimizer was able to recognize this you can see it in the execution plan: It shows as "SORT ORDER BY STOPKEY" operation.
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https://oracle-randolf.blogspot.com/2008/09/getting-first-rows-of-large-sorted.html
If the optimizer was able to recognize this you can see it in the execution plan: It shows as "SORT ORDER BY STOPKEY" operation.
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38
The Power of Inline Views
https://www.akadia.com/services/ora_subquery_inlineview.html
The inline view is a construct in Oracle SQL where you can place a query in the ... call count cpu elapsed disk query current rows ... 1 0 COUNT (STOPKEY)
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https://www.akadia.com/services/ora_subquery_inlineview.html
The inline view is a construct in Oracle SQL where you can place a query in the ... call count cpu elapsed disk query current rows ... 1 0 COUNT (STOPKEY)
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39
After upgrading Oracle to 12.2.0.1 AR System performance ...
https://bmcsites.force.com/casemgmt/sc_KnowledgeArticle?sfdcid=kA21O0000015AFeSAM&type=Solution
To know the Table ID in your database run the following query: ... If you notice SQL statements that are showing a "degraded" Execution Plan after upgrading ...
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https://bmcsites.force.com/casemgmt/sc_KnowledgeArticle?sfdcid=kA21O0000015AFeSAM&type=Solution
To know the Table ID in your database run the following query: ... If you notice SQL statements that are showing a "degraded" Execution Plan after upgrading ...
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40
Why cannot avoid the sort ORDER BY STOPKEY function index
https://www.eehelp.com/question/why-cannot-avoid-the-sort-order-by-stopkey-function-index/
But... is the AutoComplete does not? I expect that typing a few characters of the previous query would be to filter the list so that you can easily select? Or ...
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https://www.eehelp.com/question/why-cannot-avoid-the-sort-order-by-stopkey-function-index/
But... is the AutoComplete does not? I expect that typing a few characters of the previous query would be to filter the list so that you can easily select? Or ...
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41
Red Flags – How a Data Quality Issue Becomes a ...
https://perfchron.com/2015/01/09/red-flags-how-a-data-quality-issue-becomes-a-performance-issue/
When I'm reviewing the query performance of our applications, one of SQL constructs that raises a red flag for me is the use of LOWER and ...
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https://perfchron.com/2015/01/09/red-flags-how-a-data-quality-issue-becomes-a-performance-issue/
When I'm reviewing the query performance of our applications, one of SQL constructs that raises a red flag for me is the use of LOWER and ...
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42
DB Performance Engineering Training - PerfMatrix
https://www.perfmatrix.com/db-performance-engineering-training/
Execution Plan and Explain Plan, Generating Statistics, ... Inlist Operator, Count Stopkey Operator, First Row Operator, Filter Operator, ...
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https://www.perfmatrix.com/db-performance-engineering-training/
Execution Plan and Explain Plan, Generating Statistics, ... Inlist Operator, Count Stopkey Operator, First Row Operator, Filter Operator, ...
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43
How to evaluate an explain plan in Oracle - Quora
https://www.quora.com/How-do-you-evaluate-an-explain-plan-in-Oracle
An example appears in " Viewing Bitmap Indexes with EXPLAIN PLAN " . ... COUNT STOPKEY Count operation where the number of rows returned is limited by the ...
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https://www.quora.com/How-do-you-evaluate-an-explain-plan-in-Oracle
An example appears in " Viewing Bitmap Indexes with EXPLAIN PLAN " . ... COUNT STOPKEY Count operation where the number of rows returned is limited by the ...
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44
Tuning SQL with "rownum" filters - princessd8251 - 博客园
https://www.cnblogs.com/princessd8251/articles/3515596.html
Using rownum may change the all_rows optimizer mode for a query to ... subquery to use an index and invoke the COUNT STOPKEY execution plan.
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https://www.cnblogs.com/princessd8251/articles/3515596.html
Using rownum may change the all_rows optimizer mode for a query to ... subquery to use an index and invoke the COUNT STOPKEY execution plan.
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45
SQL query for queue table with priorities – Keyword Oracle
https://anjo.pt/keyword-oracle/2020/06/11/sql-query-for-queue-table-with-priorities/
The execution plan, when the table has about 20% of rows matching the ... It is worth noting that it has a COUNT STOPKEY operation and does ...
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https://anjo.pt/keyword-oracle/2020/06/11/sql-query-for-queue-table-with-priorities/
The execution plan, when the table has about 20% of rows matching the ... It is worth noting that it has a COUNT STOPKEY operation and does ...
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46
Parallel Execution
https://www.red-gate.com/simple-talk/wp-content/uploads/oracle/2013/04/Analysing-and-Troubleshooting-Parallel-Execution-short.pdf
Overall execution time in parallel can be lower than serial execution ... Query part can run parallel or serial ... 6 | COUNT STOPKEY.
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https://www.red-gate.com/simple-talk/wp-content/uploads/oracle/2013/04/Analysing-and-Troubleshooting-Parallel-Execution-short.pdf
Overall execution time in parallel can be lower than serial execution ... Query part can run parallel or serial ... 6 | COUNT STOPKEY.
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47
dbms_xplan: - Oracle database internals by Riyaj
https://orainternals.files.wordpress.com/2012/10/dbms_xplan.pdf
call count cpu elapsed disk query current ... dbms_xplan.display_awr (real,history plan from AWR) ... 11 | COUNT STOPKEY. |. | 1 |. | 999K|00:00:01.68 |.
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https://orainternals.files.wordpress.com/2012/10/dbms_xplan.pdf
call count cpu elapsed disk query current ... dbms_xplan.display_awr (real,history plan from AWR) ... 11 | COUNT STOPKEY. |. | 1 |. | 999K|00:00:01.68 |.
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48
SORT ORDER BY STOPKEY的优化 - ITPub博客
http://blog.itpub.net/26390465/viewspace-1794551/
most query in the statement. - The optimizer could not merge the view at line ID 1 of the execution plan. The optimizer cannot merge a view that ...
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http://blog.itpub.net/26390465/viewspace-1794551/
most query in the statement. - The optimizer could not merge the view at line ID 1 of the execution plan. The optimizer cannot merge a view that ...
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49
How to get the execution plan for a SQL between two AWR ...
https://dbaclass.com/article/get-execution-plan-sql-statement-two-awr-snapshots/
We can get the all the execution plan details of an sql_id for a ... 4 | PX SEND QC (ORDER) | :TQ10001 | 1 | 349 | 618 (1)| 00:00:01 | | 5 | COUNT STOPKEY ...
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https://dbaclass.com/article/get-execution-plan-sql-statement-two-awr-snapshots/
We can get the all the execution plan details of an sql_id for a ... 4 | PX SEND QC (ORDER) | :TQ10001 | 1 | 349 | 618 (1)| 00:00:01 | | 5 | COUNT STOPKEY ...
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50
오라클 (Oracle)에서 EXPLAIN PLAN 시 COUNT STOPKEY의 ...
https://devday.tistory.com/entry/%EC%98%A4%EB%9D%BC%ED%81%B4-Oracle%EC%97%90%EC%84%9C-EXPLAIN-PLAN-%EC%8B%9C-COUNT-STOPKEY%EC%9D%98-%EC%9D%98%EB%AF%B8
오라클에서 EXPLAIN PLAN으로 쿼리를 실행하면, COUNT STOPKEY가 나올 때가 있다. 이는 ROWNUM을 사용했을 때 나온다. Reference:
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https://devday.tistory.com/entry/%EC%98%A4%EB%9D%BC%ED%81%B4-Oracle%EC%97%90%EC%84%9C-EXPLAIN-PLAN-%EC%8B%9C-COUNT-STOPKEY%EC%9D%98-%EC%9D%98%EB%AF%B8
오라클에서 EXPLAIN PLAN으로 쿼리를 실행하면, COUNT STOPKEY가 나올 때가 있다. 이는 ROWNUM을 사용했을 때 나온다. Reference:
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51
SQL execution time longer from JAVA - DBAsupport.com Forums
https://www.dbasupport.com/forums/showthread.php?53819-SQL-execution-time-longer-from-JAVA&p=237627
call count cpu elapsed disk query current rows ... CARTESIAN 1 52 4 VIEW 1 26 2 COUNT STOPKEY VIEW 1 26 2 TABLE ACCESS BY INDEX ROWID CSI.
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https://www.dbasupport.com/forums/showthread.php?53819-SQL-execution-time-longer-from-JAVA&p=237627
call count cpu elapsed disk query current rows ... CARTESIAN 1 52 4 VIEW 1 26 2 COUNT STOPKEY VIEW 1 26 2 TABLE ACCESS BY INDEX ROWID CSI.
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52
How to Create, Read and Interpret an Explain Plan
https://www.morganslibrary.com/pres/lad10/cloug_1_xplan.pdf
What is an Explain Plan. ▫ When a SQL statement being explained the statement is not run. ▫ The optimizer reports what it thinks it will do when it.
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https://www.morganslibrary.com/pres/lad10/cloug_1_xplan.pdf
What is an Explain Plan. ▫ When a SQL statement being explained the statement is not run. ▫ The optimizer reports what it thinks it will do when it.
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53
Why the optimizer not picking the correct Index ? Bringing ...
https://fatdba.com/2021/12/13/why-the-optimizer-not-picking-the-correct-index-bringing-chaos-to-order/
The query was frequently waiting on User IO wait class, specially on ... All statistics looks good, I mean the row count is almost same, ...
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https://fatdba.com/2021/12/13/why-the-optimizer-not-picking-the-correct-index-bringing-chaos-to-order/
The query was frequently waiting on User IO wait class, specially on ... All statistics looks good, I mean the row count is almost same, ...
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54
Oracle Execution Plan Row Source Operator Reference - E2SN
http://tech.e2sn.com/oracle/sql/oracle-execution-plan-operation-reference?tmpl=%2Fsystem%2Fapp%2Ftemplates%2Fprint%2F&showPrintDialog=1
Every Oracle execution plan is logically a tree of row source operators (row sources) ... BITMAP CONVERSION; BITMAP INDEX; CONNECT BY; CONNECT BY PUMP; COUNT ...
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http://tech.e2sn.com/oracle/sql/oracle-execution-plan-operation-reference?tmpl=%2Fsystem%2Fapp%2Ftemplates%2Fprint%2F&showPrintDialog=1
Every Oracle execution plan is logically a tree of row source operators (row sources) ... BITMAP CONVERSION; BITMAP INDEX; CONNECT BY; CONNECT BY PUMP; COUNT ...
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55
How to Read and Interpret an Explain Plan - Polymorphe.org
https://www.polymorphe.org/index.php/311-oracle-lire-et-interpreter-un-plan-d-execution/file
SELECT COUNT(*) FROM demo;. Morgan's Library - www.morganslibrary.org. How To Read and Interpret an Explain Plan. SELECT COUNT(*) FROM demo;.
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https://www.polymorphe.org/index.php/311-oracle-lire-et-interpreter-un-plan-d-execution/file
SELECT COUNT(*) FROM demo;. Morgan's Library - www.morganslibrary.org. How To Read and Interpret an Explain Plan. SELECT COUNT(*) FROM demo;.
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56
Oracle Database Performance Tuning Guide
https://dbdmg.polito.it/wordpress/wp-content/uploads/2010/12/OracleGuide-ExplainPlan1.pdf
EXPLAIN PLAN statement and its meaning within an execution plan. ... COUNT. STOPKEY. Count operation where the number of rows returned is limited by.
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https://dbdmg.polito.it/wordpress/wp-content/uploads/2010/12/OracleGuide-ExplainPlan1.pdf
EXPLAIN PLAN statement and its meaning within an execution plan. ... COUNT. STOPKEY. Count operation where the number of rows returned is limited by.
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57
Why does the Optimiser not respect my qb_name() hint?
https://martincarstenbach.wordpress.com/2014/06/30/why-does-the-optimiser-not-respect-my-qb_name-hint/
This was rather interesting, the raw text file with the query was 33kb ... 1) -- the subquery would return 32 rows without the count stopkey.
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https://martincarstenbach.wordpress.com/2014/06/30/why-does-the-optimiser-not-respect-my-qb_name-hint/
This was rather interesting, the raw text file with the query was 33kb ... 1) -- the subquery would return 32 rows without the count stopkey.
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58
Explain-Plan - DBA-Village
https://www.dba-village.com/village/dvp_forum.OpenThread?ThreadIdA=16397
Please explain the following explain plan ... 1 0 COUNT (STOPKEY) ... Query using Hash joining of 1 index to build hash data for 2 IN ...
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https://www.dba-village.com/village/dvp_forum.OpenThread?ThreadIdA=16397
Please explain the following explain plan ... 1 0 COUNT (STOPKEY) ... Query using Hash joining of 1 index to build hash data for 2 IN ...
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59
Improve parsing and query performance - fix Oracle's fixed ...
https://blog.pythian.com/improve-parsing-query-performance-fix-oracles-fixed-object-statistics/
I ran the query and was distracted for a few moments. ... 6 | SORT ORDER BY STOPKEY| | 1 | 43 | 1 (100)| 00:00:01 |.
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https://blog.pythian.com/improve-parsing-query-performance-fix-oracles-fixed-object-statistics/
I ran the query and was distracted for a few moments. ... 6 | SORT ORDER BY STOPKEY| | 1 | 43 | 1 (100)| 00:00:01 |.
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60
Smart denormalization and Enhanced PL/SQL Function Call ...
https://technology.amis.nl/oracle/smart-denormalization-and-enhanced-plsql-function-call-performance-comparing-function-based-index-and-materialized-views/
With the advent of Materialized Views and the ever increasing query rewrite capabilities, it seems that Materialized Views can take ... 1 0 COUNT (STOPKEY)
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https://technology.amis.nl/oracle/smart-denormalization-and-enhanced-plsql-function-call-performance-comparing-function-based-index-and-materialized-views/
With the advent of Materialized Views and the ever increasing query rewrite capabilities, it seems that Materialized Views can take ... 1 0 COUNT (STOPKEY)
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61
Don't mess with LIKE - Sergey Stadnik
https://ozmoroz.com/2009/11/dont-mess-with-like/
... index wasn't used and the explain plan looked like this: SELECT STATEMENT ALL_ROWS Cost: 67 Bytes: 2,592 Cardinality: 4 2 COUNT STOPKEY ...
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https://ozmoroz.com/2009/11/dont-mess-with-like/
... index wasn't used and the explain plan looked like this: SELECT STATEMENT ALL_ROWS Cost: 67 Bytes: 2,592 Cardinality: 4 2 COUNT STOPKEY ...
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62
Analytic Views: A Performance Deep Dive Analysis
https://danischnider.wordpress.com/2017/09/09/analytic-views-a-performance-deep-dive-analysis/
I wanted to know it and analyzed the execution plans of some simple queries. ... 13 | COUNT STOPKEY | | 1 | | 1 |00:00:00.01 | 1 |
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https://danischnider.wordpress.com/2017/09/09/analytic-views-a-performance-deep-dive-analysis/
I wanted to know it and analyzed the execution plans of some simple queries. ... 13 | COUNT STOPKEY | | 1 | | 1 |00:00:00.01 | 1 |
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63
Interpreting Execution Plans - Christian Antognini
https://antognini.ch/papers/InterpretingExecutionPlans_20091017.pdf
An execution plan describes the operations carried out by the SQL engine to execute a SQL ... Stand-Alone Operations – COUNT STOPKEY .
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https://antognini.ch/papers/InterpretingExecutionPlans_20091017.pdf
An execution plan describes the operations carried out by the SQL engine to execute a SQL ... Stand-Alone Operations – COUNT STOPKEY .
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64
RAC, parallel query and udpsnoop | Oracle database internals ...
https://orainternals.wordpress.com/2009/06/20/rac-parallel-query-and-udpsnoop/
One of the myth was that how spawning parallel query slaves across ... Parallel_instance_group :ALL call count cpu elapsed disk query ...
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https://orainternals.wordpress.com/2009/06/20/rac-parallel-query-and-udpsnoop/
One of the myth was that how spawning parallel query slaves across ... Parallel_instance_group :ALL call count cpu elapsed disk query ...
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65
Mark Inman U.S. Navy (Naval Sea Logistics Center) Session ...
https://slideplayer.com/slide/8241857/
8 Simple Example Analytic Query Plan Execution Plan ... 0 SELECT STATEMENT Optimizer=ALL_ROWS 1 0 COUNT (STOPKEY) 2 1 NESTED LOOPS 3 2 VIEW 4 3 SORT ...
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https://slideplayer.com/slide/8241857/
8 Simple Example Analytic Query Plan Execution Plan ... 0 SELECT STATEMENT Optimizer=ALL_ROWS 1 0 COUNT (STOPKEY) 2 1 NESTED LOOPS 3 2 VIEW 4 3 SORT ...
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66
December 11, 2005: On a table's first five rows
http://www.adp-gmbh.ch/blog/2005/december/11.html
This can be proved by using explain plan: explain plan for select name from animals where rownum < 6; select * from table(dbms_xplan.display);.
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http://www.adp-gmbh.ch/blog/2005/december/11.html
This can be proved by using explain plan: explain plan for select name from animals where rownum < 6; select * from table(dbms_xplan.display);.
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67
Oracle Parallel Execution: Interconnect Myths And ...
http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/
Given that, it would seem impossible that this query could cause any ... QC for the COUNT STOPKEY operation thus causing the execution plan ...
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http://structureddata.org/2009/07/06/oracle-parallel-execution-interconnect-myths-and-misunderstandings/
Given that, it would seem impossible that this query could cause any ... QC for the COUNT STOPKEY operation thus causing the execution plan ...
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68
How do I report the top 10 members of the sales team - 墨天轮
https://www.modb.pro/db/24193
Our query would then become ... 0 SORT (ORDER BY) 2 1 COUNT (STOPKEY) 3 2 TABLE ACCESS (FULL) OF 'SALES' ... Here our execution plan becomes
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https://www.modb.pro/db/24193
Our query would then become ... 0 SORT (ORDER BY) 2 1 COUNT (STOPKEY) 3 2 TABLE ACCESS (FULL) OF 'SALES' ... Here our execution plan becomes
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69
explain plan | Mohamed Houri's Oracle Notes - WordPress.com
https://hourim.wordpress.com/category/explain-plan/
In the second execution plan the WINDOW NOSORT STOPKEY child operation of the VIEW is a non-blocking operation thanks to the ordered list of ...
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https://hourim.wordpress.com/category/explain-plan/
In the second execution plan the WINDOW NOSORT STOPKEY child operation of the VIEW is a non-blocking operation thanks to the ordered list of ...
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70
110509 – SQL generated for in subquery filter using 'exists' is ...
https://bugzilla.redhat.com/show_bug.cgi?id=110509
The explain plan for this shows full table scans on acs_objects, cms_items, ... 944) 1 0 VIEW (Cost=241 Card=22 Bytes=64944) 2 1 COUNT (STOPKEY) 3 2 VIEW ...
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https://bugzilla.redhat.com/show_bug.cgi?id=110509
The explain plan for this shows full table scans on acs_objects, cms_items, ... 944) 1 0 VIEW (Cost=241 Card=22 Bytes=64944) 2 1 COUNT (STOPKEY) 3 2 VIEW ...
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71
Behaviour of sub query wrapped in a pagination select ...
https://www.appsloveworld.com/oracle/100/190/behaviour-of-sub-query-wrapped-in-a-pagination-select-statement-and-rownum
... and the optimizer knows about rownum < filters, so it can influence the row source and stop it short (look for COUNT STOPKEY lines in the explain plan, ...
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https://www.appsloveworld.com/oracle/100/190/behaviour-of-sub-query-wrapped-in-a-pagination-select-statement-and-rownum
... and the optimizer knows about rownum < filters, so it can influence the row source and stop it short (look for COUNT STOPKEY lines in the explain plan, ...
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72
sql - (Oracle) How get total number of results when using a ...
https://www.lokasi.live/soal-https-stackoverflow.com/questions/2905199/oracle-how-get-total-number-of-results-when-using-a-pagination-query
The explain plan changes from doing a SORT (ORDER BY STOP KEY) to do a WINDOW (SORT). Before: SELECT STATEMENT () COUNT (STOPKEY) VIEW ...
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https://www.lokasi.live/soal-https-stackoverflow.com/questions/2905199/oracle-how-get-total-number-of-results-when-using-a-pagination-query
The explain plan changes from doing a SORT (ORDER BY STOP KEY) to do a WINDOW (SORT). Before: SELECT STATEMENT () COUNT (STOPKEY) VIEW ...
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73
Fast query results in GUIs - Mark Hoxey - WordPress.com
https://markhoxey.wordpress.com/2013/10/01/fast-query-results-in-guis/
Every now and again I get a developer asking why their query in PL/SQL ... 00:00:01 | |* 1 | COUNT STOPKEY | | | | | | | 2 | TABLE ACCESS BY ...
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https://markhoxey.wordpress.com/2013/10/01/fast-query-results-in-guis/
Every now and again I get a developer asking why their query in PL/SQL ... 00:00:01 | |* 1 | COUNT STOPKEY | | | | | | | 2 | TABLE ACCESS BY ...
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74
FIRST_ROWS vs. ALL_ROWS and ROWNUM predicate
https://dioncho.wordpress.com/2009/01/30/89/
query has an execution plan which performs index range scan. ... 0 | SELECT STATEMENT | | 1 | 17 | 3 (0)| 00:00:01 | |* 1 | COUNT STOPKEY ...
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https://dioncho.wordpress.com/2009/01/30/89/
query has an execution plan which performs index range scan. ... 0 | SELECT STATEMENT | | 1 | 17 | 3 (0)| 00:00:01 | |* 1 | COUNT STOPKEY ...
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75
Top SQL-( Rownum 의 정확한 사용법 ) - 오동규 블로그
https://scidb.tistory.com/entry/Top-SQL-Count-StopKey-%EC%9D%98-%EC%A0%95%ED%99%95%ED%95%9C-%EC%82%AC%EC%9A%A9%EB%B2%95
1 | COUNT STOPKEY | | 1 | 20 |00:00:00.01 | 8 | ... 위 PLAN 상의 A-Rows 에 나타나듯이 부서번호 20번에 해당하는 모든건을 엑세스및 조인한것이 ...
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https://scidb.tistory.com/entry/Top-SQL-Count-StopKey-%EC%9D%98-%EC%A0%95%ED%99%95%ED%95%9C-%EC%82%AC%EC%9A%A9%EB%B2%95
1 | COUNT STOPKEY | | 1 | 20 |00:00:00.01 | 8 | ... 위 PLAN 상의 A-Rows 에 나타나듯이 부서번호 20번에 해당하는 모든건을 엑세스및 조인한것이 ...
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76
Tuning with ORDER BY clause - SQL Optimizer for Oracle
https://forums.toadworld.com/t/tuning-with-order-by-clause/4864
Sql query is like this SELECT a. ... There is index on C.L_NAME column but explain plan is not showing it, ... 22 COUNT STOPKEY
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https://forums.toadworld.com/t/tuning-with-order-by-clause/4864
Sql query is like this SELECT a. ... There is index on C.L_NAME column but explain plan is not showing it, ... 22 COUNT STOPKEY
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77
8.8 Understanding the Query Execution Plan
https://dev.mysql.com/doc/refman/8.0/en/execution-plan-information.html
› execution-plan-information
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https://dev.mysql.com/doc/refman/8.0/en/execution-plan-information.html
› execution-plan-information
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78
Does the Oracle Explain Plan command really show ... - Medium
https://medium.com/oracledevs/does-the-oracle-explain-plan-command-really-show-the-execution-plan-that-will-be-used-eeb59dc9ed4
But how we generate that execution plan can have a… ... SELECT count(c_email) FROM customers WHERE c_zipcode=:nPlan hash value: ...
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https://medium.com/oracledevs/does-the-oracle-explain-plan-command-really-show-the-execution-plan-that-will-be-used-eeb59dc9ed4
But how we generate that execution plan can have a… ... SELECT count(c_email) FROM customers WHERE c_zipcode=:nPlan hash value: ...
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79
Documentation: 15: 14.1. Using EXPLAIN - PostgreSQL
https://www.postgresql.org/docs/current/using-explain.html
You can use the EXPLAIN command to see what query plan the planner creates ... The added condition stringu1 = 'xxx' reduces the output row count estimate, ...
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https://www.postgresql.org/docs/current/using-explain.html
You can use the EXPLAIN command to see what query plan the planner creates ... The added condition stringu1 = 'xxx' reduces the output row count estimate, ...
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80
PostgreSQL count(*) made fast - CYBERTEC
https://www.cybertec-postgresql.com/en/postgresql-count-made-fast/
After all, it is a complicated query, and PostgreSQL has to calculate the result before it knows how many rows it will contain.
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https://www.cybertec-postgresql.com/en/postgresql-count-made-fast/
After all, it is a complicated query, and PostgreSQL has to calculate the result before it knows how many rows it will contain.
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81
EXPLAIN | CockroachDB Docs
https://www.cockroachlabs.com/docs/stable/explain.html
The EXPLAIN statement returns CockroachDB's statement plan for a ... of rows that a scan will perform in the estimated row count property.
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https://www.cockroachlabs.com/docs/stable/explain.html
The EXPLAIN statement returns CockroachDB's statement plan for a ... of rows that a scan will perform in the estimated row count property.
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82
EXPLAIN ANALYZE — Trino 403 Documentation
https://trino.io/docs/current/sql/explain-analyze.html
Execute the statement and show the distributed execution plan of the statement ... EXPLAIN ANALYZE SELECT count(*), clerk FROM orders WHERE orderdate > date ...
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https://trino.io/docs/current/sql/explain-analyze.html
Execute the statement and show the distributed execution plan of the statement ... EXPLAIN ANALYZE SELECT count(*), clerk FROM orders WHERE orderdate > date ...
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83
Count and Sum Millions of Rows Fast with Materialized Views
https://www.youtube.com/watch?v=loCzmsvfPrM
Oracle Developers
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https://www.youtube.com/watch?v=loCzmsvfPrM
Oracle Developers
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84
Troubleshooting Oracle Performance - Page 329 - Google Books Result
https://books.google.com/books?id=-cjAAwAAQBAJ&pg=PA329&lpg=PA329&dq=count+stopkey+explain+plan&source=bl&ots=yfjKh_6z_k&sig=ACfU3U3ljgQ5JQmnGh1hSsRdca2Hxl0Deg&hl=en&sa=X&ved=2ahUKEwjN2r-hs9L7AhWzTaQEHcabAmUQ6AF6BQioAhAD
The COUNT STOPKEY operation is commonly used to execute top-n queries. ... 329 Chapter 10 □ exeCution plans Optimization of the COUNT STOPKEY Operation.
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https://books.google.com/books?id=-cjAAwAAQBAJ&pg=PA329&lpg=PA329&dq=count+stopkey+explain+plan&source=bl&ots=yfjKh_6z_k&sig=ACfU3U3ljgQ5JQmnGh1hSsRdca2Hxl0Deg&hl=en&sa=X&ved=2ahUKEwjN2r-hs9L7AhWzTaQEHcabAmUQ6AF6BQioAhAD
The COUNT STOPKEY operation is commonly used to execute top-n queries. ... 329 Chapter 10 □ exeCution plans Optimization of the COUNT STOPKEY Operation.
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85
Does the Explain Plan command really show the execution ...
https://sqlmaria.com/2017/11/21/does-the-explain-plan-command-really-show-the-execution-plan-that-will-be-used/
Let's look at a simple example, using the customers tables, which has 1,018 rows and an index on the C_ZIPCODE column. SELECT COUNT(*) FROM ...
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https://sqlmaria.com/2017/11/21/does-the-explain-plan-command-really-show-the-execution-plan-that-will-be-used/
Let's look at a simple example, using the customers tables, which has 1,018 rows and an index on the C_ZIPCODE column. SELECT COUNT(*) FROM ...
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86
Oracle High Performance Tuning for 9i and 10g
https://books.google.com/books?id=MFgDkAv1bT8C&pg=PA344&lpg=PA344&dq=count+stopkey+explain+plan&source=bl&ots=UsPBOVldta&sig=ACfU3U3kOuIC89ORHGh7AVBzbi2i9mLBcw&hl=en&sa=X&ved=2ahUKEwjN2r-hs9L7AhWzTaQEHcabAmUQ6AF6BQimAhAD
The rest of the output shows a general analysis plus a query plan. ... depth: 1) Rows Execution Plan SELECT STATEMENT GOAL: CHOOSE COUNT (STOPKEY) VIEW SORT ...
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https://books.google.com/books?id=MFgDkAv1bT8C&pg=PA344&lpg=PA344&dq=count+stopkey+explain+plan&source=bl&ots=UsPBOVldta&sig=ACfU3U3kOuIC89ORHGh7AVBzbi2i9mLBcw&hl=en&sa=X&ved=2ahUKEwjN2r-hs9L7AhWzTaQEHcabAmUQ6AF6BQimAhAD
The rest of the output shows a general analysis plus a query plan. ... depth: 1) Rows Execution Plan SELECT STATEMENT GOAL: CHOOSE COUNT (STOPKEY) VIEW SORT ...
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87
Oracle Performance Tuning for 10gR2
https://books.google.com/books?id=wgBMWCvTEHQC&pg=PA387&lpg=PA387&dq=count+stopkey+explain+plan&source=bl&ots=pGwERy0o_l&sig=ACfU3U2z1M1pzp6POrkmKIuJVcn_z3FmyA&hl=en&sa=X&ved=2ahUKEwjN2r-hs9L7AhWzTaQEHcabAmUQ6AF6BQipAhAD
The rest of the output shows a general analysis plus a query plan: Misses in library cache during parse: 1 Optimizer goal: CHOOSE Parsing user id: 88 ...
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https://books.google.com/books?id=wgBMWCvTEHQC&pg=PA387&lpg=PA387&dq=count+stopkey+explain+plan&source=bl&ots=pGwERy0o_l&sig=ACfU3U2z1M1pzp6POrkmKIuJVcn_z3FmyA&hl=en&sa=X&ved=2ahUKEwjN2r-hs9L7AhWzTaQEHcabAmUQ6AF6BQipAhAD
The rest of the output shows a general analysis plus a query plan: Misses in library cache during parse: 1 Optimizer goal: CHOOSE Parsing user id: 88 ...
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