srf_index_hash(1) [debian man page]

srf_index_hash(1)						   Staden io_lib						 srf_index_hash(1)

NAME

       srf_index_hash - Adds a hash-table index to an SRF file.

SYNOPSIS

       srf_index_hash  [-c] srf_archive

DESCRIPTION

       srf_index_hash  adds  and index to an SRF file or replaces an existing index with a new one. In the case of concatenated SRF files only the
       index at the end of a file will be replaced, but internal indices will not be consulted by SRF tools.

       The index is a hash table indexing the sequence names only. The name itself does not appear in the index, rather the top 7-bits of a 64-bit
       hash  key  are held in the index along with N-bits used to determine the hash bucket. This reduces the index size to around 10-15 bytes per
       sequence.

OPTIONS

       -c     Check only. This requests that the index is not produced, but the checks performed during the creation of an index (such as  looking
	      for duplicate sequence names) are still performed.

AUTHOR

       James Bonfield, Wellcome Trust Sanger Institute

								   September 29 						 srf_index_hash(1)

DROP 
INDEX(7)						  PostgreSQL 9.2.7 Documentation					     DROP INDEX(7)

NAME

       DROP_INDEX - remove an index

SYNOPSIS

       DROP INDEX [ CONCURRENTLY ] [ IF EXISTS ] name [, ...] [ CASCADE | RESTRICT ]

DESCRIPTION

       DROP INDEX drops an existing index from the database system. To execute this command you must be the owner of the index.

PARAMETERS

       CONCURRENTLY
	   Drop the index without locking out concurrent selects, inserts, updates, and deletes on the index's table. A normal DROP INDEX acquires
	   exclusive lock on the table, blocking other accesses until the index drop can be completed. With this option, the command instead waits
	   until conflicting transactions have completed.

	   There are several caveats to be aware of when using this option. Only one index name can be specified, and the CASCADE option is not
	   supported. (Thus, an index that supports a UNIQUE or PRIMARY KEY constraint cannot be dropped this way.) Also, regular DROP INDEX
	   commands can be performed within a transaction block, but DROP INDEX CONCURRENTLY cannot.

       IF EXISTS
	   Do not throw an error if the index does not exist. A notice is issued in this case.

       name
	   The name (optionally schema-qualified) of an index to remove.

       CASCADE
	   Automatically drop objects that depend on the index.

       RESTRICT
	   Refuse to drop the index if any objects depend on it. This is the default.

EXAMPLES

       This command will remove the index title_idx:

	   DROP INDEX title_idx;

COMPATIBILITY

       DROP INDEX is a PostgreSQL language extension. There are no provisions for indexes in the SQL standard.

SEE ALSO

       CREATE INDEX (CREATE_INDEX(7))

PostgreSQL 9.2.7						    2014-02-17							     DROP INDEX(7)