Manual creation: Using the app to organically create test data is just plain tedious. Here are some popular approaches which are ultimately all pretty flawed: Thing is though, the way some folks deal with them is rather problematic. The issues above are not new, in fact they’re very well trodden paths. A customer management app, for example, is going to be very hard to test without a good set of customer records. Many of the functions they need to perform in order to fully experience the product are dependent on the presence of data.
#RAW DATA GENERATOR SOFTWARE#
One of the primary ideas of a test cycle is that it allows the app owner to experience what the software will be like once it rolls out. “It never did that under development or test.” A handful of records in your test environment versus a few million in production will do that.Īnother issue is usability. It’s a common scene for a developer to begin scratching his head when faced with the lethargic performance of an application which has spent some time accruing transactional data. Software has a funny habit of behaving differently once it starts dealing with decent volumes of data. So what’s the problem? Well, there’s a couple of discrete challenges when suitable test data is not available, one of them being performance. In fact it’s almost magical when you see it in action over your own data schema. And then there’s Red Gate’s SQL Data Generator, which is none of these. There are a whole bunch of counter-techniques for the empty database problem ranging from the tedious to the impractical to the downright ridiculous. The problem is simply this: without data in the test environment which is representative of what you’ll end up with in the production environment, it’s very difficult to properly simulate the way the app will behave after it rolls out.
#RAW DATA GENERATOR SERIES#
Msg 257, Level 16, State 3, Line 1 - Implicit conversion from data type varchar to varbinary is not allowed.A series of discussions last week got me around to talking about the right way to test a system against a realistic set of data. In SQL Server, you have to specify 0x1, not 1 or '1' to insert the same value: Dump the content SELECT DUMP (c1 ) FROM rawdata WHERE c1 = '01' Insert one byte with value 1 INSERT INTO rawdata VALUES ( '1' )
The following statement inserts a single byte with value 1 into a RAW column in Oracle: Table content after inserting 'AB' in Oracle and 0xAB in SQL Server: SQL Server: - Insert hex value AB (1 byte) INSERT INTO rawdata VALUES (0xAB )
To insert a hex value AB to a VARBINARY column in SQL Server, you can use hex number, not a string literal: INSERT INTO rawdata VALUES (CAST ( 'AB' AS VARBINARY ) ) Īlthough you can successfully cast 'AB' as VARBINARY, SQL Server treats 'AB' as a 2-byte string, and converts it to 0x4142 hex number before insert. Msg 257, Level 16, State 3, Line 1 - Implicit conversion from data type varchar to varbinary is not allowed. SQL Server: - Insert without cast fails INSERT INTO rawdata VALUES ( 'AB' ) In SQL Server, you can use CAST function to insert a value from a string literal into VARBINARY column, but the inserted value is not the same as if you insert a string literal into RAW column in Oracle. You can replace RAW(n) with VARBINARY(n) in CREATE TABLE statement in SQL Server:īut INSERT syntax to insert data into Oracle RAW and SQL Server columns is completely different The hex value AB corresponds to the decimal value 171, and the hex value CD to decimal value 205. Output the content of RAW data SELECT RAWTOHEX (c1 ), DUMP (c1 ) FROM rawdata In Oracle, you can use RAWHOTEXT and DUMP functions, to output the context of RAW data:
ERROR at line 1: - ORA-00932: inconsistent datatypes: expected BINARY got NUMBER ERROR at line 1: - ORA-01465: invalid hex number - Numbers are not allowed INSERT INTO rawdata VALUES (100 ) AZ is not valid hex value INSERT INTO rawdata VALUES ( 'AZ' ) Also Oracle does not allow inserting number values. Note that Oracle does not convert a string to hex representation, the string literal must already contain hex values. Inserts hex value ABCD (2 bytes) INSERT INTO rawdata VALUES ( 'ABCD' ) Insert hex value AB (1 byte) INSERT INTO rawdata VALUES ( 'AB' ) Define a table with RAW column CREATE TABLE rawdata In Oracle, you can use a string literal containing a hex value to insert data into a RAW column:
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