MemoSoup » create http://www.memosoup.com Mix of the things I always forget Tue, 07 Feb 2012 00:03:54 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 Oracle: recreate database links http://www.memosoup.com/20090920/oracle-recreate-database-links.html http://www.memosoup.com/20090920/oracle-recreate-database-links.html#comments Sun, 20 Sep 2009 18:39:05 +0000 admin http://www.memosoup.com/?p=143
SELECT
 'create '
 ||DECODE(U.NAME,'PUBLIC','public ')
 ||'database link '||CHR(10)
 ||DECODE(U.NAME,'PUBLIC',NULL, U.NAME||'.')
 || L.NAME||CHR(10)
 ||'connect to ' || L.USERID || ' identified by '''
 ||L.PASSWORD||''' using ''' || L.host || ''''
 ||CHR(10)||';' TEXT
FROM  
 sys.LINK$ L,
 sys.USER$ U
WHERE L.OWNER# = U.USER# ;
]]> http://www.memosoup.com/20090920/oracle-recreate-database-links.html/feed 0 JavaScript: build table dynamically http://www.memosoup.com/20090918/javascript-build-table-dynamically.html http://www.memosoup.com/20090918/javascript-build-table-dynamically.html#comments Fri, 18 Sep 2009 15:18:15 +0000 admin http://www.memosoup.com/?p=136
<script type="text/javascript">
function buildTable(n_rows,n_columns) {

var the_body = document.getElementsByTagName("body")[0];

<code>var new_table = document.createElement("table");
var new_tbody = document.createElement("tbody");

var new_row, new_col, new_text ;

for(row=1;row<=n_rows;row++) {
new_row = document.createElement("tr");
new_row.className = "tr"+row ;
for(col=1;col<=n_columns;col++) {
new_col = document.createElement("td");
new_col.className = "td"+col ;
new_text = document.createTextNode("text:" + row + ":" + col );

new_col.appendChild(new_text);
new_row.appendChild(new_col);
}
new_tbody.appendChild(new_row);
}

new_table.appendChild(new_tbody);
new_table.setAttribute("border", "2");

the_body.appendChild(new_table);

return new_table ;

}
</script>
<body>
Example:
<script type="text/javascript">
buildTable(4,3)
</script>
</body>

There is also interesting article on oreillynet.com, discussing performance improvement for such operations.

]]> http://www.memosoup.com/20090918/javascript-build-table-dynamically.html/feed 0 Creation and using of Sybase DBCCDB database http://www.memosoup.com/20090915/creation-and-using-of-sybase-dbccdb-database.html http://www.memosoup.com/20090915/creation-and-using-of-sybase-dbccdb-database.html#comments Tue, 15 Sep 2009 21:56:35 +0000 admin http://www.memosoup.com/?p=108 Planning:

sp_plan_dbccdb '{dbname}'

Creation:

create database dbccdb on ... log on ... isql -U sa -i $SYBASE/$SYBASE_ASE/scripts/installdbccdb

DBCCDB Configuration:

sp_configure "number of worker processes", {value_from_sp_plan} -- create named cache for dbccdb sp_cacheconfig "dbccdb_cache", "{cache_size}M"   -- Size is at least 40 * 16K * (number of working processes) sp_poolconfig "dbccdb_cache", "{pool_size}M", "16K"

Working space configuration:

[...]]]> Planning:

sp_plan_dbccdb '{dbname}'

Creation:

create database dbccdb on ... log on ...

isql -U sa -i $SYBASE/$SYBASE_ASE/scripts/installdbccdb

DBCCDB Configuration:

sp_configure "number of worker processes", {value_from_sp_plan}

-- create named cache for dbccdb
sp_cacheconfig "dbccdb_cache", "{cache_size}M"  

-- Size is at least 40 * 16K * (number of working processes)
sp_poolconfig "dbccdb_cache", "{pool_size}M", "16K"

Working space configuration:

sp_dbcc_createws dbccdb, "default", scan_{dbname}, scan, '{size_from_sp_plan}'
sp_dbcc_createws dbccdb, "default", text_{dbname}, text, '{size_from_sp_plan}'

sp_dbcc_updateconfig {dbname}, 'max worker processes', '{value_from_sp_plan}'
sp_dbcc_updateconfig {dbname}, 'dbcc named cache','dbccdb_cache', '{size}'
sp_dbcc_updateconfig {dbname}, 'scan workspace','scan_{dbname}'
sp_dbcc_updateconfig {dbname}, 'text workspace','text_{dbname}'

dbcc checking:

dbcc checkstorage ({dbname})
dbcc checkverify ({dbname})

dbcc report:

sp_dbcc_summaryreport
sp_dbcc_configreport
sp_dbcc_statisticsreport
sp_dbcc_faultreport ['short'|'long']

-- all above
sp_dbcc_fullreport

Fixing the errors
Warning: just some tips here. See Sybase documentation for the complete description of the repair action

100035, 100025, 100021  - dbcc checktable ( %s , "fix_spacebits")
forwarded rows errors - reorg compact %s with resume , time = '%d'
Others:
Index code == 0 - dbcc tablealloc ( %s , "full" , "fix")
Index code != 0  - dbcc indexalloc ( %s , %s , "full" , "fix")

System tables require special processing - see Sybase documentation for the details
]]> http://www.memosoup.com/20090915/creation-and-using-of-sybase-dbccdb-database.html/feed 0