68 lines
2.4 KiB
MySQL
68 lines
2.4 KiB
MySQL
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-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
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-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
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DROP TABLE t;
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CREATE TABLE t AS SELECT * FROM dba_objects;
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SELECT
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MIN(created)
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, MAX(created)
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, ROUND(MAX(created)-MIN(created)) range_days
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, COUNT(*) num_rows
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, COUNT(*) / ROUND(MAX(created)-MIN(created)) rows_per_day
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, SUM(NVL2(created,0,1)) nulls
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FROM
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t
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/
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EXEC DBMS_STATS.GATHER_TABLE_STATS(user, 'T', method_opt=>'FOR TABLE', no_invalidate=>FALSE);
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-- SELECT * FROM t WHERE created > SYSDATE - 1;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE + 1;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE + 10;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE + 100;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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-- SELECT * FROM t WHERE created > DATE'2012-09-01';
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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SELECT * FROM t WHERE created < DATE'2010-10-01';
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SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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EXEC DBMS_STATS.GATHER_TABLE_STATS(user, 'T', method_opt=>'FOR TABLE FOR ALL COLUMNS SIZE 254', no_invalidate=>FALSE);
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-- SELECT * FROM t WHERE created > SYSDATE - 1;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE + 1;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE + 10;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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--
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-- SELECT * FROM t WHERE created > SYSDATE + 100;
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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-- SELECT * FROM t WHERE created > DATE'2012-09-01';
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-- SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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SELECT * FROM t WHERE created < DATE'2010-10-01';
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SELECT * FROM TABLE(DBMS_XPLAN.DISPLAY_CURSOR(null,null,'+PEEKED_BINDS'));
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