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Syntax documentation lock_statement Locate the document in the library structure

<lock_statement> ::=
  LOCK [(WAIT)|(NOWAIT)] <
lock_spec> IN SHARE MODE
| LOCK [(WAIT)|(NOWAIT)] <lock_spec> IN EXCLUSIVE MODE
| LOCK [(WAIT)|(NOWAIT)] <
row_spec>... OPTIMISTIC
| LOCK [(WAIT)|(NOWAIT)] <lock_spec> IN SHARE MODE <lock_spec> IN EXCLUSIVE MODE

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