StringIndexOutOfBoundsException in SQLiteDatabase rawQuery()

Question

I cannot get around this Exception. Am i missing something obvious?

Stack Trace

12-05 20:07:43.129: E/AndroidRuntime(4154): FATAL EXCEPTION: Thread-1470
12-05 20:07:43.129: E/AndroidRuntime(4154): java.lang.StringIndexOutOfBoundsException: length=0; regionStart=0; regionLength=6
12-05 20:07:43.129: E/AndroidRuntime(4154):     at java.lang.String.startEndAndLength(String.java:593)
12-05 20:07:43.129: E/AndroidRuntime(4154):     at java.lang.String.substring(String.java:1474)
12-05 20:07:43.129: E/AndroidRuntime(4154):     at net.sqlcipher.database.SQLiteProgram.<init>(SQLiteProgram.java:69)
12-05 20:07:43.129: E/AndroidRuntime(4154):     at net.sqlcipher.database.SQLiteQuery.<init>(SQLiteQuery.java:49)
12-05 20:07:43.129: E/AndroidRuntime(4154):     at net.sqlcipher.database.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:42)
12-05 20:07:43.129: E/AndroidRuntime(4154):     at net.sqlcipher.database.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1420)
12-05 20:07:43.129: E/AndroidRuntime(4154):     at net.sqlcipher.database.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1389)

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Query used

Query= SELECT column1,max(datetime(creation_timestamp)) FROM table_name where dfs_id=? GROUP BY column2

(column1, column2, table_name etc are placeholders - not the actual names)

Argument passed = "a08eff29ee6a71dd_1381146091100_0002"

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Note: I am using SQLCipher(A wrapper around SQLCipher), which should not be relevant to this exception.

Answer 1

The code that causes the StringIndexOutOfBoundsException is the following.

/* package */ SQLiteProgram(SQLiteDatabase db, String sql) {
    mDatabase = db;
    mSql = sql.trim();
    db.acquireReference();
    db.addSQLiteClosable(this);
    this.nHandle = db.mNativeHandle;

    // only cache CRUD statements
    String prefixSql = mSql.substring(0, 6); // <<<< HERE

The only reason why you can get that exception is a String with less than 6 characters. (Your's is length=0; i.e. empty after the trim() a few lines above)

There is no indication where or how exactly you manage to put an empty string in there. It comes from a SQLiteDatabase.rawQuery but that could have been called from other query methods. Look further down the stacktrace and look through your code where you are possibly passing an empty string to a query method.

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Your query also seems to break the syntax of the where clause: If there is an AND it would have to be

WHERE {condition} AND {another condition expected here} GROUP BY ...

You have either forgot to add another expression or you have an AND too much.

And table is a reserved keyword. To use those as names you'll have to quote them. SQLite supports quotation marks ("), backticks (`) and brackets ([]).

Answer 2

I think the problem is that you are using table for the name of your table. TABLE is a command in SQL; it should not be used for table names. Since SQL is not case-sensitive TABLE is the same as table. Just change the name of your table to something else.

Answer 3

The stack strace shows that you give an empty query string to the rawQuery function.