Truncation Error with Concat
----------------------------
Key: DERBY-1132
URL: http://issues.apache.org/jira/browse/DERBY-1132
Project: Derby
Type: Bug
Components: JDBC
Versions: 10.1.1.0
Environment: Solaris, Windwos, JDK 1.5
Reporter: Mitesh Meswani
Consider the table
CREATE TABLE CUSTOMER_TABLE ( ID VARCHAR(255) PRIMARY KEY NOT NULL, NAMEZ
VARCHAR(255) , COUNTRY VARCHAR(255) )
Sql:
PreparedStatement ps = conn.prepateStatement ("SELECT * FROM CUSTOMER_TABLE
WHERE NAMEZ = VARCHAR ( CAST (? AS VARCHAR(32672) ) || CAST (? AS
VARCHAR(32672) ) )" );
ps.setString(1, "Alan E. ");
ps.setString(2, "Frechette");
ps.executeQuery()
Error:
"A truncation error was encountered trying to shrink VARCHAR 'Alan E.
Frechette' to length 15."
getErrorCode()-1
getSQLState()22001
Please note that
-The query executes ok against DB2 database
-The query executes ok if the total length of both the parameters bound is less
than 15. That is as follows
//Total length of parameters bound = len("Alan E. Fre") = 11
ps.setString(1, "Alan E. ");
ps.setString(2, "Fre");
-The error occurs both with embedded and network mode of derby
-Omitting the casts as follows also gives the same error
query: SELECT * FROM CUSTOMER_TABLE WHERE NAMEZ = VARCHAR( 'Frechette' || ?
)
error: SQLState: 22001 "A truncation error was encountered trying to shrink
VARCHAR 'FrechetteAlan E. ' to length 15"
-Using parameter markers for both the variables without cast like as follows
results in error
query: SELECT * FROM CUSTOMER_TABLE WHERE NAMEZ = ? || ?
error: SQLState: 42X35 "It is not allowed for both operands of '||' to be ?
parameters."
-Using parameter markers for only one variables without cast like as follows
results in error
query: SELECT * FROM CUSTOMER_TABLE WHERE NAMEZ = 'Frechette' || ?
error:SQLState: 42818 "Comparisons between 'VARCHAR' and 'LONG VARCHAR' are
not supported."
-It works to cast to VARCHAR(2000), but not VARCHAR(2001) or larger.
Regardless of length, if it fails, the magic number is always 15.
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