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RE: hash join order

From: MacGregor, Ian A. <ian_at_SLAC.Stanford.EDU>
Date: Thu, 23 Aug 2001 21:26:57 -0700
Message-ID: <F001.003767BE.20010823212524@fatcity.com>

I cannot peoclaim it with absolute authority not being privy to Oracle internals; however it would make sense to hash the table b_tab.

Ian MacGregor
Stanford Linear Accelerator Center
ian_at_slac.stanford.edu

-----Original Message-----
Sent: Thursday, August 23, 2001 6:35 PM
To: Multiple recipients of list ORACLE-L

Does anyone know how the operation below is performed? Which object has the hashtable built on it and which object performs the lookup against the hashtable once it's built?

| Operation                                      |  Name              |
-----------------------------------------------------------------------
|   0    SELECT STATEMENT                        |                    |
|   1  0 HASH JOIN                               |                    |
|   2  1  TABLE ACCESS FULL                      |B_TAB               |
|   3  1  INDEX FAST FULL SCAN                   |PK_A_TAB            |
-----------------------------------------------------------------------



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Author: MacGregor, Ian A.
  INET: ian_at_SLAC.Stanford.EDU
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