Hi all,
I have a question regarding the escapeText method in
org.apache.torque.adapter.DBOracle class. Unlike the DBMSSQL, DBSybase class
this method in DBOracle returns a false. However, oracle does require escape
characters for interpreting certain special characters like "_" literally.
Below is a copy of the source code in DBOracle.
/**
* This method is for the SqlExpression.quoteAndEscape rules. The rule is,
* any string in a SqlExpression with a BACKSLASH will either be changed to
* "\\" or left as "\". SapDB does not need the escape character.
*
* @return false.
*/
public boolean escapeText()
{
return false;
}
The usecase I am trying out is one where a column in the table queried has
values 'abc' and 'a_c'. I need to query the record that has the column value
as 'a_c'. If I issue a query without escapecharacters (where <column> like
'a_%' ) both the rows are returned. I need to provide a where clause with the
condition as <column> like 'a\_%' to get the correct record (also need to add
ESCAPE keyword to the query). However, because escapeText returns false, the
criteria value gets built wrongly in the buildLike method of SQLExpression
class.. (the method returns 'a\%'). If escapeText returns true this problem
will be solved (ESCAPE keyword addition needs to be tackled also).
Thanks,
Sarathy
PS: information regarding escape characters in Oracle
http://www.dba-oracle.com/tips_oracle_escape_characters.htm
