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PEAR Manual
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DB_Common::nextId() -- returns the next free id of a sequence

resource nextId (string $seq_name, boolean $onDemand = TRUE)

string $seq_name: name of the sequence
boolean $onDemand: when TRUE the sequence is automatic created, if it not exists.

resource - a free id or a DB_Error, if fail

Table 20-1. Possible PEAR_Error values

Error code	Error message	Reason	Solution
`DB_ERROR_NOT_CAPABLE`	`NULL`	Function is not supported by the database backend	Switch to another database system, if you really need this feature.
`DB_ERROR_NOT_LOCKED`	`NULL`	Locking of sequence table fails	Database specific, check documention of your database,
`DB_ERROR_NOSUCHTABLE`	`NULL`	Sequence table was not found	Try to create a new sequence or if you are sure, a sequence was already create, check database integrity

This function can not be called statically.

createSequence() , dropSequence()

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