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SQLITE3_BIND_BLOB(3) Library Functions Manual SQLITE3_BIND_BLOB(3)
NAME
sqlite3_bind_blob, sqlite3_bind_blob64, sqlite3_bind_double,
sqlite3_bind_int, sqlite3_bind_int64, sqlite3_bind_null,
sqlite3_bind_text, sqlite3_bind_text16, sqlite3_bind_text64,
sqlite3_bind_value, sqlite3_bind_pointer, sqlite3_bind_zeroblob,
sqlite3_bind_zeroblob64 - Binding Values To Prepared Statements
SYNOPSIS
int
sqlite3_bind_blob(sqlite3_stmt*, int, const void*, int n,
void(*)(void*));
int
sqlite3_bind_blob64(sqlite3_stmt*, int, const void*, sqlite3_uint64,
void(*)(void*));
int
sqlite3_bind_double(sqlite3_stmt*, int, double);
int
sqlite3_bind_int(sqlite3_stmt*, int, int);
int
sqlite3_bind_int64(sqlite3_stmt*, int, sqlite3_int64);
int
sqlite3_bind_null(sqlite3_stmt*, int);
int
sqlite3_bind_text(sqlite3_stmt*, int, const char*, int, void(*)(void*));
int
sqlite3_bind_text16(sqlite3_stmt*, int, const void*, int,
void(*)(void*));
int
sqlite3_bind_text64(sqlite3_stmt*, int, const char*, sqlite3_uint64,
void(*)(void*), unsigned char encoding);
int
sqlite3_bind_value(sqlite3_stmt*, int, const sqlite3_value*);
int
sqlite3_bind_pointer(sqlite3_stmt*, int, void*, const char*,
void(*)(void*));
int
sqlite3_bind_zeroblob(sqlite3_stmt*, int, int n);
int
sqlite3_bind_zeroblob64(sqlite3_stmt*, int, sqlite3_uint64);
DESCRIPTION
In the SQL statement text input to sqlite3_prepare_v2() and its variants,
literals may be replaced by a parameter that matches one of following
templates:
⊕ ?
⊕ ?NNN
⊕ :VVV
⊕ @VVV
⊕ $VVV
In the templates above, NNN represents an integer literal, and VVV
represents an alphanumeric identifier. The values of these parameters
(also called "host parameter names" or "SQL parameters") can be set using
the sqlite3_bind_*() routines defined here.
The first argument to the sqlite3_bind_*() routines is always a pointer
to the sqlite3_stmt object returned from sqlite3_prepare_v2() or its
variants.
The second argument is the index of the SQL parameter to be set. The
leftmost SQL parameter has an index of 1. When the same named SQL
parameter is used more than once, second and subsequent occurrences have
the same index as the first occurrence. The index for named parameters
can be looked up using the sqlite3_bind_parameter_index() API if desired.
The index for "?NNN" parameters is the value of NNN. The NNN value must
be between 1 and the sqlite3_limit() parameter
SQLITE_LIMIT_VARIABLE_NUMBER (default value: 999).
The third argument is the value to bind to the parameter. If the third
parameter to sqlite3_bind_text() or sqlite3_bind_text16() or
sqlite3_bind_blob() is a NULL pointer then the fourth parameter is
ignored and the end result is the same as sqlite3_bind_null().
In those routines that have a fourth argument, its value is the number of
bytes in the parameter. To be clear: the value is the number of
<u>bytes</u> in the value, not the number of characters. If the fourth
parameter to sqlite3_bind_text() or sqlite3_bind_text16() is negative,
then the length of the string is the number of bytes up to the first zero
terminator. If the fourth parameter to sqlite3_bind_blob() is negative,
then the behavior is undefined. If a non-negative fourth parameter is
provided to sqlite3_bind_text() or sqlite3_bind_text16() or
sqlite3_bind_text64() then that parameter must be the byte offset where
the NUL terminator would occur assuming the string were NUL terminated.
If any NUL characters occur at byte offsets less than the value of the
fourth parameter then the resulting string value will contain embedded
NULs. The result of expressions involving strings with embedded NULs is
undefined.
The fifth argument to the BLOB and string binding interfaces is a
destructor used to dispose of the BLOB or string after SQLite has
finished with it. The destructor is called to dispose of the BLOB or
string even if the call to bind API fails. If the fifth argument is the
special value SQLITE_STATIC, then SQLite assumes that the information is
in static, unmanaged space and does not need to be freed. If the fifth
argument has the value SQLITE_TRANSIENT, then SQLite makes its own
private copy of the data immediately, before the sqlite3_bind_*() routine
returns.
The sixth argument to sqlite3_bind_text64() must be one of SQLITE_UTF8,
SQLITE_UTF16, SQLITE_UTF16BE, or SQLITE_UTF16LE to specify the encoding
of the text in the third parameter. If the sixth argument to
sqlite3_bind_text64() is not one of the allowed values shown above, or if
the text encoding is different from the encoding specified by the sixth
parameter, then the behavior is undefined.
The sqlite3_bind_zeroblob() routine binds a BLOB of length N that is
filled with zeroes. A zeroblob uses a fixed amount of memory (just an
integer to hold its size) while it is being processed. Zeroblobs are
intended to serve as placeholders for BLOBs whose content is later
written using incremental BLOB I/O routines. A negative value for the
zeroblob results in a zero-length BLOB.
The sqlite3_bind_pointer(S,I,P,T,D) routine causes the I-th parameter in
prepared statement S to have an SQL value of NULL, but to also be
associated with the pointer P of type T. D is either a NULL pointer or a
pointer to a destructor function for P. SQLite will invoke the
destructor D with a single argument of P when it is finished using P.
The T parameter should be a static string, preferably a string literal.
The sqlite3_bind_pointer() routine is part of the pointer passing
interface added for SQLite 3.20.0.
If any of the sqlite3_bind_*() routines are called with a NULL pointer
for the prepared statement or with a prepared statement for which
sqlite3_step() has been called more recently than sqlite3_reset(), then
the call will return SQLITE_MISUSE. If any sqlite3_bind_() routine is
passed a prepared statement that has been finalized, the result is
undefined and probably harmful.
Bindings are not cleared by the sqlite3_reset() routine. Unbound
parameters are interpreted as NULL.
The sqlite3_bind_* routines return SQLITE_OK on success or an error code
if anything goes wrong. SQLITE_TOOBIG might be returned if the size of a
string or BLOB exceeds limits imposed by
sqlite3_limit(SQLITE_LIMIT_LENGTH) or SQLITE_MAX_LENGTH. SQLITE_RANGE is
returned if the parameter index is out of range. SQLITE_NOMEM is
returned if malloc() fails.
SEE ALSO
sqlite3_stmt(3), sqlite3_bind_parameter_count(3),
sqlite3_bind_parameter_index(3), sqlite3_bind_parameter_name(3),
sqlite3_blob_open(3), sqlite3_limit(3), sqlite3_prepare(3),
sqlite3_reset(3), sqlite3_step(3), sqlite3_stmt(3),
SQLITE_LIMIT_LENGTH(3), SQLITE_OK(3), sqlite3_destructor_type(3),
SQLITE_OK(3), sqlite3_destructor_type(3), SQLITE_UTF8(3)
NetBSD 9.99 December 19, 2018 NetBSD 9.99