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📁 ..
📄 ABORT.7(2.2 KB)
📄 ALTER_AGGREGATE.7(3.53 KB)
📄 ALTER_COLLATION.7(2.8 KB)
📄 ALTER_CONVERSION.7(2.9 KB)
📄 ALTER_DATABASE.7(5.28 KB)
📄 ALTER_DEFAULT_PRIVILEGES.7(6.39 KB)
📄 ALTER_DOMAIN.7(6.79 KB)
📄 ALTER_EXTENSION.7(6.54 KB)
📄 ALTER_FOREIGN_DATA_WRAPPER.7(4.37 KB)
📄 ALTER_FOREIGN_TABLE.7(7.6 KB)
📄 ALTER_FUNCTION.7(7.62 KB)
📄 ALTER_GROUP.7(3 KB)
📄 ALTER_INDEX.7(4.51 KB)
📄 ALTER_LANGUAGE.7(2.1 KB)
📄 ALTER_LARGE_OBJECT.7(1.97 KB)
📄 ALTER_OPERATOR.7(3.01 KB)
📄 ALTER_OPERATOR_CLASS.7(2.85 KB)
📄 ALTER_OPERATOR_FAMILY.7(9.09 KB)
📄 ALTER_ROLE.7(8.23 KB)
📄 ALTER_SCHEMA.7(2.31 KB)
📄 ALTER_SEQUENCE.7(7.52 KB)
📄 ALTER_SERVER.7(3.4 KB)
📄 ALTER_TABLE.7(30.51 KB)
📄 ALTER_TABLESPACE.7(3.27 KB)
📄 ALTER_TEXT_SEARCH_CONFIGURATION.7(4.8 KB)
📄 ALTER_TEXT_SEARCH_DICTIONARY.7(4.03 KB)
📄 ALTER_TEXT_SEARCH_PARSER.7(2.27 KB)
📄 ALTER_TEXT_SEARCH_TEMPLATE.7(2.31 KB)
📄 ALTER_TRIGGER.7(2.51 KB)
📄 ALTER_TYPE.7(6.87 KB)
📄 ALTER_USER.7(2.49 KB)
📄 ALTER_USER_MAPPING.7(3.28 KB)
📄 ALTER_VIEW.7(3.89 KB)
📄 ANALYZE.7(7.52 KB)
📄 BEGIN.7(4.08 KB)
📄 CHECKPOINT.7(2.32 KB)
📄 CLOSE.7(2.76 KB)
📄 CLUSTER.7(6.26 KB)
📄 COMMENT.7(9 KB)
📄 COMMIT.7(2.12 KB)
📄 COMMIT_PREPARED.7(2.61 KB)
📄 COPY.7(26.12 KB)
📄 CREATE_AGGREGATE.7(9.44 KB)
📄 CREATE_CAST.7(14.07 KB)
📄 CREATE_COLLATION.7(4.01 KB)
📄 CREATE_CONVERSION.7(3.82 KB)
📄 CREATE_DATABASE.7(7.86 KB)
📄 CREATE_DOMAIN.7(5.37 KB)
📄 CREATE_EXTENSION.7(5.67 KB)
📄 CREATE_FOREIGN_DATA_WRAPPER.7(5.08 KB)
📄 CREATE_FOREIGN_TABLE.7(4.7 KB)
📄 CREATE_FUNCTION.7(21.62 KB)
📄 CREATE_GROUP.7(2.17 KB)
📄 CREATE_INDEX.7(18.72 KB)
📄 CREATE_LANGUAGE.7(9.86 KB)
📄 CREATE_OPERATOR.7(6.92 KB)
📄 CREATE_OPERATOR_CLASS.7(8.54 KB)
📄 CREATE_OPERATOR_FAMILY.7(3.64 KB)
📄 CREATE_ROLE.7(12.18 KB)
📄 CREATE_RULE.7(7.91 KB)
📄 CREATE_SCHEMA.7(5.4 KB)
📄 CREATE_SEQUENCE.7(9.11 KB)
📄 CREATE_SERVER.7(3.68 KB)
📄 CREATE_TABLE.7(39.83 KB)
📄 CREATE_TABLESPACE.7(3.52 KB)
📄 CREATE_TABLE_AS.7(7.94 KB)
📄 CREATE_TEXT_SEARCH_CONFIGURATION.7(3.25 KB)
📄 CREATE_TEXT_SEARCH_DICTIONARY.7(3.39 KB)
📄 CREATE_TEXT_SEARCH_PARSER.7(3.61 KB)
📄 CREATE_TEXT_SEARCH_TEMPLATE.7(3.43 KB)
📄 CREATE_TRIGGER.7(15.11 KB)
📄 CREATE_TYPE.7(28.33 KB)
📄 CREATE_USER.7(2.48 KB)
📄 CREATE_USER_MAPPING.7(3.31 KB)
📄 CREATE_VIEW.7(7.13 KB)
📄 DEALLOCATE.7(2.05 KB)
📄 DECLARE.7(10.26 KB)
📄 DELETE.7(7.39 KB)
📄 DISCARD.7(2.53 KB)
📄 DO.7(3.13 KB)
📄 DROP_AGGREGATE.7(2.58 KB)
📄 DROP_CAST.7(2.29 KB)
📄 DROP_COLLATION.7(2.34 KB)
📄 DROP_CONVERSION.7(2.4 KB)
📄 DROP_DATABASE.7(2.41 KB)
📄 DROP_DOMAIN.7(2.25 KB)
📄 DROP_EXTENSION.7(2.64 KB)
📄 DROP_FOREIGN_DATA_WRAPPER.7(2.52 KB)
📄 DROP_FOREIGN_TABLE.7(2.5 KB)
📄 DROP_FUNCTION.7(3.27 KB)
📄 DROP_GROUP.7(1.6 KB)
📄 DROP_INDEX.7(2.99 KB)
📄 DROP_LANGUAGE.7(2.77 KB)
📄 DROP_OPERATOR.7(2.9 KB)
📄 DROP_OPERATOR_CLASS.7(3.38 KB)
📄 DROP_OPERATOR_FAMILY.7(3.16 KB)
📄 DROP_OWNED.7(3.02 KB)
📄 DROP_ROLE.7(3.08 KB)
📄 DROP_RULE.7(2.2 KB)
📄 DROP_SCHEMA.7(2.55 KB)
📄 DROP_SEQUENCE.7(2.38 KB)
📄 DROP_SERVER.7(2.3 KB)
📄 DROP_TABLE.7(2.88 KB)
📄 DROP_TABLESPACE.7(2.51 KB)
📄 DROP_TEXT_SEARCH_CONFIGURATION.7(2.76 KB)
📄 DROP_TEXT_SEARCH_DICTIONARY.7(2.67 KB)
📄 DROP_TEXT_SEARCH_PARSER.7(2.58 KB)
📄 DROP_TEXT_SEARCH_TEMPLATE.7(2.61 KB)
📄 DROP_TRIGGER.7(2.52 KB)
📄 DROP_TYPE.7(2.43 KB)
📄 DROP_USER.7(1.68 KB)
📄 DROP_USER_MAPPING.7(2.59 KB)
📄 DROP_VIEW.7(2.34 KB)
📄 END.7(2.21 KB)
📄 EXECUTE.7(2.96 KB)
📄 EXPLAIN.7(12.89 KB)
📄 FETCH.7(8.52 KB)
📄 GRANT.7(21.41 KB)
📄 INSERT.7(8.74 KB)
📄 LISTEN.7(3.53 KB)
📄 LOAD.7(2.58 KB)
📄 LOCK.7(7.92 KB)
📄 MOVE.7(2.96 KB)
📄 NOTIFY.7(7.96 KB)
📄 PREPARE.7(6.2 KB)
📄 PREPARE_TRANSACTION.7(5.77 KB)
📄 REASSIGN_OWNED.7(3.08 KB)
📄 REINDEX.7(7.85 KB)
📄 RELEASE_SAVEPOINT.7(3.06 KB)
📄 RESET.7(2.96 KB)
📄 REVOKE.7(10.46 KB)
📄 ROLLBACK.7(2.12 KB)
📄 ROLLBACK_PREPARED.7(2.64 KB)
📄 ROLLBACK_TO_SAVEPOINT.7(4.01 KB)
📄 SAVEPOINT.7(3.55 KB)
📄 SECURITY_LABEL.7(5.29 KB)
📄 SELECT.7(52.77 KB)
📄 SELECT_INTO.7(4.53 KB)
📄 SET.7(7.46 KB)
📄 SET_CONSTRAINTS.7(4.56 KB)
📄 SET_ROLE.7(4.38 KB)
📄 SET_SESSION_AUTHORIZATION.7(3.92 KB)
📄 SET_TRANSACTION.7(8.44 KB)
📄 SHOW.7(4.25 KB)
📄 START_TRANSACTION.7(2.93 KB)
📄 TABLE.7(18 B)
📄 TRUNCATE.7(6.24 KB)
📄 UNLISTEN.7(2.77 KB)
📄 UPDATE.7(10.63 KB)
📄 VACUUM.7(7.09 KB)
📄 VALUES.7(6.97 KB)
📄 WITH.7(18 B)

Editing: CREATE_CONVERSION.7

'\" t
.\"     Title: CREATE CONVERSION
.\"    Author: The PostgreSQL Global Development Group
.\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
.\"      Date: 2017-11-06
.\"    Manual: PostgreSQL 9.2.24 Documentation
.\"    Source: PostgreSQL 9.2.24
.\"  Language: English
.\"
.TH "CREATE CONVERSION" "7" "2017-11-06" "PostgreSQL 9.2.24" "PostgreSQL 9.2.24 Documentation"
.\" -----------------------------------------------------------------
.\" * Define some portability stuff
.\" -----------------------------------------------------------------
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.\" http://bugs.debian.org/507673
.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
.ie \n(.g .ds Aq \(aq
.el       .ds Aq '
.\" -----------------------------------------------------------------
.\" * set default formatting
.\" -----------------------------------------------------------------
.\" disable hyphenation
.nh
.\" disable justification (adjust text to left margin only)
.ad l
.\" -----------------------------------------------------------------
.\" * MAIN CONTENT STARTS HERE *
.\" -----------------------------------------------------------------
.SH "NAME"
CREATE_CONVERSION \- define a new encoding conversion
.\" CREATE CONVERSION
.SH "SYNOPSIS"
.sp
.nf
CREATE [ DEFAULT ] CONVERSION \fIname\fR
    FOR \fIsource_encoding\fR TO \fIdest_encoding\fR FROM \fIfunction_name\fR
.fi
.SH "DESCRIPTION"
.PP
\fBCREATE CONVERSION\fR
defines a new conversion between character set encodings\&. Also, conversions that are marked
DEFAULT
can be used for automatic encoding conversion between client and server\&. For this purpose, two conversions, from encoding A to B
\fIand\fR
from encoding B to A, must be defined\&.
.PP
To be able to create a conversion, you must have
EXECUTE
privilege on the function and
CREATE
privilege on the destination schema\&.
.SH "PARAMETERS"
.PP
DEFAULT
.RS 4
The
DEFAULT
clause indicates that this conversion is the default for this particular source to destination encoding\&. There should be only one default encoding in a schema for the encoding pair\&.
.RE
.PP
\fIname\fR
.RS 4
The name of the conversion\&. The conversion name can be schema\-qualified\&. If it is not, the conversion is defined in the current schema\&. The conversion name must be unique within a schema\&.
.RE
.PP
\fIsource_encoding\fR
.RS 4
The source encoding name\&.
.RE
.PP
\fIdest_encoding\fR
.RS 4
The destination encoding name\&.
.RE
.PP
\fIfunction_name\fR
.RS 4
The function used to perform the conversion\&. The function name can be schema\-qualified\&. If it is not, the function will be looked up in the path\&.
.sp
The function must have the following signature:
.sp
.if n \{\
.RS 4
.\}
.nf
conv_proc(
    integer,  \-\- source encoding ID
    integer,  \-\- destination encoding ID
    cstring,  \-\- source string (null terminated C string)
    internal, \-\- destination (fill with a null terminated C string)
    integer   \-\- source string length
) RETURNS void;
.fi
.if n \{\
.RE
.\}
.RE
.SH "NOTES"
.PP
Use
\fBDROP CONVERSION\fR
to remove user\-defined conversions\&.
.PP
The privileges required to create a conversion might be changed in a future release\&.
.SH "EXAMPLES"
.PP
To create a conversion from encoding
UTF8
to
LATIN1
using
\fBmyfunc\fR:
.sp
.if n \{\
.RS 4
.\}
.nf
CREATE CONVERSION myconv FOR \*(AqUTF8\*(Aq TO \*(AqLATIN1\*(Aq FROM myfunc;
.fi
.if n \{\
.RE
.\}
.SH "COMPATIBILITY"
.PP
\fBCREATE CONVERSION\fR
is a
PostgreSQL
extension\&. There is no
\fBCREATE CONVERSION\fR
statement in the SQL standard, but a
\fBCREATE TRANSLATION\fR
statement that is very similar in purpose and syntax\&.
.SH "SEE ALSO"
ALTER CONVERSION (\fBALTER_CONVERSION\fR(7)), CREATE FUNCTION (\fBCREATE_FUNCTION\fR(7)), DROP CONVERSION (\fBDROP_CONVERSION\fR(7))

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