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<h1 align="center">SQL As Understood By SQLite</h1><p><a href="lang.html">[Top]</a></p><h2>REINDEX</h2><p><b><a href="syntax/reindex-stmt.html">reindex-stmt:</a></b>
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<blockquote id='x1136'>
<img alt="syntax diagram reindex-stmt" src="images/syntax/reindex-stmt.gif" />
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<p>The REINDEX command is used to delete and recreate indices from scratch.
This is useful when the definition of a collation sequence has changed.
</p>
<p>If the REINDEX keyword is not followed by a collation-sequence or database
object identifier, then all indices in all attached databases are rebuilt.
<p>If the REINDEX keyword is followed by a collation-sequence name, then
all indices in all attached databases that use the named collation sequences
are recreated.
<p>Or, if the argument attached to the REINDEX identifies a specific
database table, then all indices attached to the database table are rebuilt.
If it identifies a specific database index, then just that index is recreated.
<p>If no <i>database-name</i> is specified and there exists both a table or
index and a collation sequence of the specified name, SQLite interprets
this as a request to rebuild the indices that use the named collation sequence.
This ambiguity in the syntax may be avoided by always specifying a
<i>database-name</i> when reindexing a specific table or index.
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