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written in main.cf, which is normally world-readable. Support
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for this form will be removed in a future Postfix version.
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Postfix 2.2 has enhanced query interfaces for MySQL and PostgreSQL;
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these include features previously available only in the Postfix
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LDAP client. In the new interface the SQL query is specified via
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a single \fBquery\fR parameter (described in more detail below).
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When the new \fBquery\fR parameter is not specified in the map
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definition, Postfix reverts to the old interface, with the SQL
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query constructed from the \fBselect_field\fR, \fBtable\fR,
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\fBwhere_field\fR and \fBadditional_conditions\fR parameters.
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The old interface will be gradually phased out. To migrate to
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the new interface set:
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Normally, the SQL query is specified via a single \fBquery\fR
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parameter (described in more detail below). When this
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parameter is not specified in the map definition, Postfix
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reverts to an older interface, with the SQL query constructed
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from the \fBselect_field\fR, \fBtable\fR, \fBwhere_field\fR
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and \fBadditional_conditions\fR parameters. The old interface
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will be gradually phased out. To migrate to the new interface
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\fBquery\fR = SELECT [\fIselect_field\fR]
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postconf(5), configuration parameters
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ldap_table(5), LDAP lookup tables
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pgsql_table(5), PostgreSQL lookup tables
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sqlite_table(5), SQLite lookup tables
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.SH "README FILES"