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The definitions of t1 and t2 are identical. They both have 1,000 rows, and the column n1 is defined to hold 100 copies each of the values 1 to 10. When we run the query, we should join 100 rows in t1 to 100 rows in t2 for an output count of 10,000 rows. This is the execution plan we get from 9.2.0.6 using dbms_xplan.display(): --------------------------------------------------------------------| Id | Operation | Name | Rows | Bytes | Cost | --------------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | 6 | 404 | | 1 | SORT AGGREGATE | | 1 | 6 | | | 2 | MERGE JOIN CARTESIAN| | 10000 | 60000 | 404 | |* 3 | TABLE ACCESS FULL | T1 | 100 | 300 | 4 | | 4 | BUFFER SORT | | 100 | 300 | 400 | |* 5 | TABLE ACCESS FULL | T2 | 100 | 300 | 4 | --------------------------------------------------------------------Predicate Information (identified by operation id): --------------------------------------------------3 - filter("T1"."N1"=5) 5 - filter("T2"."N1"=5) The cardinality is correct, but look at the cost. Notice the merge join Cartesian that appears in line 2, and the way that the buffer sort in line 4 has acquired a cost of 400 (which looks remarkably like the cost of the t2 tablescan 100 times once for each row in t1). Checking the predicate information, you find no predicate joining the two tables the join predicate disappears as the second constant predicate is created. But if you can interfere with the closure algorithm in a suitable way, the plan changes to the following (note how the cost seems reasonable, but the cardinality [with heading Rows ] is now much too low): zxing qr code reader java What is the best Java QR code generator library ? - Stack Overflow
2 Answers. I don't know what qualifies as best but zxing has a qr code generator for java , is actively developed, and is liberally licensed. QRGen is a good library that creates a layer on top of ZXing and makes QR Code generation in Java a piece of cake. java applet qr code reader Popular JavaScript qrcode Projects - Libraries.io
JavaScript barcode generator supporting over 90 types and standards. Latest release 1.7.3 ... React component to generate QRCode with logo. Latest release ... The InternalsVisibleTo attribute is an example of an assembly attribute. As you saw in 2, attributes in general specify metadata that can be applied to program elements. If the word assembly is specified in square brackets, the attribute applies to the entire assembly. Most of the metadata in the manifest can be set via assembly attributes. In order to see the details of what is occupying the space on your memory card, click the Show Details button underneath the Available Memory after sync number in the middle upper part of the window. Once you are done with your selection of pictures, click the Sync Pictures button in the lower right corner. Your sync status will be shown in the top portion of the window. google qr code generator javascript Topic: qrcode - reader · GitHub
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QR Code Reader Java Apps - Download with Nokia, Samsung, Motorola, LG, Sony Ericsson, Blackberry and for all other Java supported J2ME mobile phones. -------------------------------------------------------------------| Id | Operation | Name | Rows | Bytes | Cost | -------------------------------------------------------------------| 0 | SELECT STATEMENT | | 1 | 6 | 9 | | 1 | SORT AGGREGATE | | 1 | 6 | | |* 2 | HASH JOIN | | 1000 | 6000 | 9 | |* 3 | TABLE ACCESS FULL | T1 | 100 | 300 | 4 | |* 4 | TABLE ACCESS FULL | T2 | 100 | 300 | 4 | -------------------------------------------------------------------Predicate Information (identified by operation id): --------------------------------------------------2 - access("T2""N1"="T1""N1") 3 - filter("T1""N1"=5) 4 - filter("T2""N1"=5) There are two ways to achieve this effect: Add the predicate t2n1 = 5 explicitly Add a duplicate of the predicate t2n1 = t1n1 A third (undesirable) option is the good old rule-based trick changing the join predicate to t2n1 = t1n1 + 0. Look carefully at the Synchronization complete message (Figure 3-11). If some songs are protected, then they will not be synced to your BlackBerry. In this example, 35 songs were protected. qr code vcard generator javascript Tested: Java midlet QR code readers - James Royal-Lawson
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24 Oct 2010 ... I've tested 7 different Java QR Code readers using a number of QR Codes ... This reader is the most common barcode scanner on Android phones and ... was that I received an error when trying to download the software. Unfortunately, when you adopt this worst-practice approach, the optimizer gets the right join cardinality (10,000) and a sensible cost (9) So be a little careful if you find joins that are producing strange plans and cardinalities; you may have to doctor them (and document the hacks in anticipation of the next upgrade) to con the optimizer into treating them sensibly Of course, it is easiest to consider transitive closure with equality signs all around, but the optimizer can be cleverer than that In the more general case, the optimizer is able to infer the following: if n1 operator constant and n2 = n1, then n2 operator constant For example: if n1 < 10 and n2 = n1, then n2 < 10 Similarly, if col1 > col2 and col2 > {constant K}, then Oracle can infer the predicate col1 > {constant K}. qr code programmieren java Write a QR Code Reader in Java using Zxing | CalliCoder
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Code scanner library for Android, based on ZXing. Contribute to yuriy-budiyev/ code- scanner development by creating an account on ... UPC-A, Code 39, QR Code ... fun onPause() { codeScanner .releaseResources() super.onPause() } }. Java .
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