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const char *sqlite3_bind_parameter_name(sqlite3_stmt*, int);
The sqlite3_bind_parameter_name(P,N) interface returns the name of the N-th SQL parameter in the prepared statement P. SQL parameters of the form "?NNN" or ":AAA" or "@AAA" or "$AAA" have a name which is the string "?NNN" or ":AAA" or "@AAA" or "$AAA" respectively. In other words, the initial ":" or "$" or "@" or "?" is included as part of the name. Parameters of the form "?" without a following integer have no name and are referred to as "nameless" or "anonymous parameters".
The first host parameter has an index of 1, not 0.
If the value N is out of range or if the N-th parameter is nameless, then NULL is returned. The returned string is always in UTF-8 encoding even if the named parameter was originally specified as UTF-16 in sqlite3_prepare16() or sqlite3_prepare16_v2().
See also: sqlite3_bind(), sqlite3_bind_parameter_count(), and sqlite3_bind_parameter_index().