Please help me understand 2 things I found in this C code: First, there is the whole code: usbMsgLen_t usbFunctionSetup(uchar data[8]) { usbRequest_t *rq = (void *)data; static uchar dataBuffer[4]; /* buffer must stay valid when usbFunctionSetup returns */ if(rq->bRequest == CUSTOM_RQ_ECHO){ /* echo -- used for reliabi...
Hi, I have the following scenario: In a MySQL database, I have 2 MyISAM tables, one with 4.2 million rows, and another with 320 million rows. The following is the schema for the tables: Table1 (4.2M rows) F1 INTEGER UNSIGNED NOT NULL PRIMARY KEY f2 varchar(40) f3 varchar(40) f4 varchar(40) f5 varchar(40) f6 smallint(6) f7 smallint(6) ...
I want to debug the whole flow of a java program .What is the difference between F5 and F6 in eclipse view in this case. ...
Hello all I'm trying to optimize this mysql query using EXPLAIN. Can somebody please help me out over here? EXPLAIN SELECT * FROM keyword WHERE keyword LIKE "panasonic%" AND keyword != "panasonic" AND price < 3230 AND price > 3370 ORDER BY price DESC LIMIT 99 Basically I want to find out the keywords which start with "some keyword" b...
I'm searching an Solr index with SolrJ and trying to get the Lucene explanation for logging it for further use. The code goes like this: SolrServer server = new CommonsHttpSolrServer("solr_url"); SolrQuery solrquery = new SolrQuery(); solrquery.set("fl", "score, id"); // id is a String field solrquery.set("rows", "1000"...
I've come across a query that is taking "too long". The query has 50+ left joins between 10 or so tables. To give a brief overview of the database model, the tables joined are tables that store data for a particular data type (ex: date_fields, integer_fields, text_fields, etc.) and each has a column for the value, a "datafield" id, and a...