.\" auto-generated by docbook2man-spec $Revision: 1.1.1.1 $ CREATE CONVERSION - Online Linux Manual PageSection : 7
Updated : 2014-02-17
Source : SQL - Language Statements
Note : SQL Commands
NAMECREATE CONVERSION − define a new encoding conversion
SYNOPSISCREATE [ DEFAULT ] CONVERSION name
FOR source_encoding TO dest_encoding FROM funcname
DESCRIPTIONCREATE CONVERSION 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 and from encoding B to A, must be defined. To be able to create a conversion, you must have EXECUTE privilege on the function and CREATE privilege on the destination schema.
PARAMETERSDEFAULT 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. name 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. source_encoding The source encoding name. dest_encoding The destination encoding name. funcname 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. The function must have the following signature: 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;
NOTESUse DROP CONVERSION to remove user-defined conversions. The privileges required to create a conversion might be changed in a future release.
EXAMPLESTo create a conversion from encoding UTF8 to LATIN1 using myfunc: CREATE CONVERSION myconv FOR 'UTF8' TO 'LATIN1' FROM myfunc;
COMPATIBILITYCREATE CONVERSION is a PostgreSQL extension. There is no CREATE CONVERSION statement in the SQL standard.
SEE ALSOALTER CONVERSION [alter_conversion(7)], CREATE FUNCTION [create_function(7)], DROP CONVERSION [drop_conversion(7)] 0
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