DBD-SQLite
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/*
** CAPI3REF: Test if a changeset has recorded any changes.
**
** Return non-zero if no changes to attached tables have been recorded by
** the session object passed as the first argument. Otherwise, if one or
** more changes have been recorded, return zero.
**
** Even if this function returns zero, it is possible that calling
** [sqlite3session_changeset()] on the session handle may still return a
** changeset that contains no changes. This can happen when a row in
** an attached table is modified and then later on the original values
** are restored. However, if this function returns non-zero, then it is
** guaranteed that a call to sqlite3session_changeset() will return a
** changeset containing zero changes.
*/
SQLITE_API int sqlite3session_isempty(sqlite3_session *pSession);
/*
** CAPI3REF: Query for the amount of heap memory used by a session object.
**
** This API returns the total amount of heap memory in bytes currently
** used by the session object passed as the only argument.
*/
SQLITE_API sqlite3_int64 sqlite3session_memory_used(sqlite3_session *pSession);
/*
** CAPI3REF: Create An Iterator To Traverse A Changeset
** CONSTRUCTOR: sqlite3_changeset_iter
**
** Create an iterator used to iterate through the contents of a changeset.
** If successful, *pp is set to point to the iterator handle and SQLITE_OK
** is returned. Otherwise, if an error occurs, *pp is set to zero and an
** SQLite error code is returned.
**
** The following functions can be used to advance and query a changeset
** iterator created by this function:
**
** <ul>
** <li> [sqlite3changeset_next()]
** <li> [sqlite3changeset_op()]
** <li> [sqlite3changeset_new()]
** <li> [sqlite3changeset_old()]
** </ul>
**
** It is the responsibility of the caller to eventually destroy the iterator
** by passing it to [sqlite3changeset_finalize()]. The buffer containing the
** changeset (pChangeset) must remain valid until after the iterator is
** destroyed.
**
** Assuming the changeset blob was created by one of the
** [sqlite3session_changeset()], [sqlite3changeset_concat()] or
** [sqlite3changeset_invert()] functions, all changes within the changeset
** that apply to a single table are grouped together. This means that when
** an application iterates through a changeset using an iterator created by
** this function, all changes that relate to a single table are visited
** consecutively. There is no chance that the iterator will visit a change
** the applies to table X, then one for table Y, and then later on visit
** another change for table X.
**
** The behavior of sqlite3changeset_start_v2() and its streaming equivalent
** may be modified by passing a combination of
** [SQLITE_CHANGESETSTART_INVERT | supported flags] as the 4th parameter.
**
** Note that the sqlite3changeset_start_v2() API is still <b>experimental</b>
** and therefore subject to change.
*/
SQLITE_API int sqlite3changeset_start(
sqlite3_changeset_iter **pp, /* OUT: New changeset iterator handle */
int nChangeset, /* Size of changeset blob in bytes */
void *pChangeset /* Pointer to blob containing changeset */
);
SQLITE_API int sqlite3changeset_start_v2(
sqlite3_changeset_iter **pp, /* OUT: New changeset iterator handle */
int nChangeset, /* Size of changeset blob in bytes */
void *pChangeset, /* Pointer to blob containing changeset */
int flags /* SESSION_CHANGESETSTART_* flags */
);
/*
** CAPI3REF: Flags for sqlite3changeset_start_v2
**
** The following flags may passed via the 4th parameter to
** [sqlite3changeset_start_v2] and [sqlite3changeset_start_v2_strm]:
**
** <dt>SQLITE_CHANGESETSTART_INVERT <dd>
** Invert the changeset while iterating through it. This is equivalent to
** inverting a changeset using sqlite3changeset_invert() before applying it.
** It is an error to specify this flag with a patchset.
*/
#define SQLITE_CHANGESETSTART_INVERT 0x0002
/*
** CAPI3REF: Advance A Changeset Iterator
** METHOD: sqlite3_changeset_iter
**
** This function may only be used with iterators created by the function
** [sqlite3changeset_start()]. If it is called on an iterator passed to
** a conflict-handler callback by [sqlite3changeset_apply()], SQLITE_MISUSE
** is returned and the call has no effect.
**
** Immediately after an iterator is created by sqlite3changeset_start(), it
** does not point to any change in the changeset. Assuming the changeset
** is not empty, the first call to this function advances the iterator to
** point to the first change in the changeset. Each subsequent call advances
** the iterator to point to the next change in the changeset (if any). If
** no error occurs and the iterator points to a valid change after a call
** to sqlite3changeset_next() has advanced it, SQLITE_ROW is returned.
** Otherwise, if all changes in the changeset have already been visited,
** SQLITE_DONE is returned.
**
** If an error occurs, an SQLite error code is returned. Possible error
** codes include SQLITE_CORRUPT (if the changeset buffer is corrupt) or
** SQLITE_NOMEM.
*/
SQLITE_API int sqlite3changeset_next(sqlite3_changeset_iter *pIter);
/*
** CAPI3REF: Obtain The Current Operation From A Changeset Iterator
** METHOD: sqlite3_changeset_iter
** if( rc==SQLITE_OK ){
** rc = sqlite3changegroup_output(pGrp, pnOut, ppOut);
** }else{
** *ppOut = 0;
** *pnOut = 0;
** }
** </pre>
**
** Refer to the sqlite3_changegroup documentation below for details.
*/
SQLITE_API int sqlite3changeset_concat(
int nA, /* Number of bytes in buffer pA */
void *pA, /* Pointer to buffer containing changeset A */
int nB, /* Number of bytes in buffer pB */
void *pB, /* Pointer to buffer containing changeset B */
int *pnOut, /* OUT: Number of bytes in output changeset */
void **ppOut /* OUT: Buffer containing output changeset */
);
/*
** CAPI3REF: Changegroup Handle
**
** A changegroup is an object used to combine two or more
** [changesets] or [patchsets]
*/
typedef struct sqlite3_changegroup sqlite3_changegroup;
/*
** CAPI3REF: Create A New Changegroup Object
** CONSTRUCTOR: sqlite3_changegroup
**
** An sqlite3_changegroup object is used to combine two or more changesets
** (or patchsets) into a single changeset (or patchset). A single changegroup
** object may combine changesets or patchsets, but not both. The output is
** always in the same format as the input.
**
** If successful, this function returns SQLITE_OK and populates (*pp) with
** a pointer to a new sqlite3_changegroup object before returning. The caller
** should eventually free the returned object using a call to
** sqlite3changegroup_delete(). If an error occurs, an SQLite error code
** (i.e. SQLITE_NOMEM) is returned and *pp is set to NULL.
**
** The usual usage pattern for an sqlite3_changegroup object is as follows:
**
** <ul>
** <li> It is created using a call to sqlite3changegroup_new().
**
** <li> Zero or more changesets (or patchsets) are added to the object
** by calling sqlite3changegroup_add().
**
** <li> The result of combining all input changesets together is obtained
** by the application via a call to sqlite3changegroup_output().
**
** <li> The object is deleted using a call to sqlite3changegroup_delete().
** </ul>
**
** Any number of calls to add() and output() may be made between the calls to
** new() and delete(), and in any order.
**
** As well as the regular sqlite3changegroup_add() and
** sqlite3changegroup_output() functions, also available are the streaming
** versions sqlite3changegroup_add_strm() and sqlite3changegroup_output_strm().
*/
SQLITE_API int sqlite3changegroup_new(sqlite3_changegroup **pp);
/*
** CAPI3REF: Add a Schema to a Changegroup
** METHOD: sqlite3_changegroup_schema
**
** This method may be used to optionally enforce the rule that the changesets
** added to the changegroup handle must match the schema of database zDb
** ("main", "temp", or the name of an attached database). If
** sqlite3changegroup_add() is called to add a changeset that is not compatible
** with the configured schema, SQLITE_SCHEMA is returned and the changegroup
** object is left in an undefined state.
**
** A changeset schema is considered compatible with the database schema in
** the same way as for sqlite3changeset_apply(). Specifically, for each
** table in the changeset, there exists a database table with:
**
** <ul>
** <li> The name identified by the changeset, and
** <li> at least as many columns as recorded in the changeset, and
** <li> the primary key columns in the same position as recorded in
** the changeset.
** </ul>
**
** The output of the changegroup object always has the same schema as the
** database nominated using this function. In cases where changesets passed
** to sqlite3changegroup_add() have fewer columns than the corresponding table
** in the database schema, these are filled in using the default column
** values from the database schema. This makes it possible to combined
** changesets that have different numbers of columns for a single table
** within a changegroup, provided that they are otherwise compatible.
*/
SQLITE_API int sqlite3changegroup_schema(sqlite3_changegroup*, sqlite3*, const char *zDb);
/*
** CAPI3REF: Add A Changeset To A Changegroup
** METHOD: sqlite3_changegroup
**
** Add all changes within the changeset (or patchset) in buffer pData (size
** nData bytes) to the changegroup.
**
** If the buffer contains a patchset, then all prior calls to this function
** on the same changegroup object must also have specified patchsets. Or, if
** the buffer contains a changeset, so must have the earlier calls to this
** function. Otherwise, SQLITE_ERROR is returned and no changes are added
** to the changegroup.
**
** Rows within the changeset and changegroup are identified by the values in
** their PRIMARY KEY columns. A change in the changeset is considered to
** apply to the same row as a change already present in the changegroup if
** the two rows have the same primary key.
**
** Changes to rows that do not already appear in the changegroup are
** simply copied into it. Or, if both the new changeset and the changegroup
** contain changes that apply to a single row, the final contents of the
** changegroup depends on the type of each change, as follows:
**
** <table border=1 style="margin-left:8ex;margin-right:8ex">
** <dt>INSERT Changes<dd>
** For each INSERT change, an attempt is made to insert the new row into
** the database. If the changeset row contains fewer fields than the
** database table, the trailing fields are populated with their default
** values.
**
** If the attempt to insert the row fails because the database already
** contains a row with the same primary key values, the conflict handler
** function is invoked with the second argument set to
** [SQLITE_CHANGESET_CONFLICT].
**
** If the attempt to insert the row fails because of some other constraint
** violation (e.g. NOT NULL or UNIQUE), the conflict handler function is
** invoked with the second argument set to [SQLITE_CHANGESET_CONSTRAINT].
** This includes the case where the INSERT operation is re-attempted because
** an earlier call to the conflict handler function returned
** [SQLITE_CHANGESET_REPLACE].
**
** <dt>UPDATE Changes<dd>
** For each UPDATE change, the function checks if the target database
** contains a row with the same primary key value (or values) as the
** original row values stored in the changeset. If it does, and the values
** stored in all modified non-primary key columns also match the values
** stored in the changeset the row is updated within the target database.
**
** If a row with matching primary key values is found, but one or more of
** the modified non-primary key fields contains a value different from an
** original row value stored in the changeset, the conflict-handler function
** is invoked with [SQLITE_CHANGESET_DATA] as the second argument. Since
** UPDATE changes only contain values for non-primary key fields that are
** to be modified, only those fields need to match the original values to
** avoid the SQLITE_CHANGESET_DATA conflict-handler callback.
**
** If no row with matching primary key values is found in the database,
** the conflict-handler function is invoked with [SQLITE_CHANGESET_NOTFOUND]
** passed as the second argument.
**
** If the UPDATE operation is attempted, but SQLite returns
** SQLITE_CONSTRAINT, the conflict-handler function is invoked with
** [SQLITE_CHANGESET_CONSTRAINT] passed as the second argument.
** This includes the case where the UPDATE operation is attempted after
** an earlier call to the conflict handler function returned
** [SQLITE_CHANGESET_REPLACE].
** </dl>
**
** It is safe to execute SQL statements, including those that write to the
** table that the callback related to, from within the xConflict callback.
** This can be used to further customize the application's conflict
** resolution strategy.
**
** If the output parameters (ppRebase) and (pnRebase) are non-NULL and
** the input is a changeset (not a patchset), then sqlite3changeset_apply_v2()
** may set (*ppRebase) to point to a "rebase" that may be used with the
** sqlite3_rebaser APIs buffer before returning. In this case (*pnRebase)
** is set to the size of the buffer in bytes. It is the responsibility of the
** caller to eventually free any such buffer using sqlite3_free(). The buffer
** is only allocated and populated if one or more conflicts were encountered
** while applying the patchset. See comments surrounding the sqlite3_rebaser
** APIs for further details.
**
** The behavior of sqlite3changeset_apply_v2() and its streaming equivalent
** may be modified by passing a combination of
** [SQLITE_CHANGESETAPPLY_NOSAVEPOINT | supported flags] as the 9th parameter.
**
** Note that the sqlite3changeset_apply_v2() API is still <b>experimental</b>
** and therefore subject to change.
*/
SQLITE_API int sqlite3changeset_apply(
sqlite3 *db, /* Apply change to "main" db of this handle */
int nChangeset, /* Size of changeset in bytes */
void *pChangeset, /* Changeset blob */
int(*xFilter)(
void *pCtx, /* Copy of sixth arg to _apply() */
const char *zTab /* Table name */
),
int(*xConflict)(
void *pCtx, /* Copy of sixth arg to _apply() */
int eConflict, /* DATA, MISSING, CONFLICT, CONSTRAINT */
sqlite3_changeset_iter *p /* Handle describing change and conflict */
),
void *pCtx /* First argument passed to xConflict */
);
SQLITE_API int sqlite3changeset_apply_v2(
sqlite3 *db, /* Apply change to "main" db of this handle */
int nChangeset, /* Size of changeset in bytes */
void *pChangeset, /* Changeset blob */
int(*xFilter)(
void *pCtx, /* Copy of sixth arg to _apply() */
const char *zTab /* Table name */
),
int(*xConflict)(
void *pCtx, /* Copy of sixth arg to _apply() */
int eConflict, /* DATA, MISSING, CONFLICT, CONSTRAINT */
sqlite3_changeset_iter *p /* Handle describing change and conflict */
),
void *pCtx, /* First argument passed to xConflict */
void **ppRebase, int *pnRebase, /* OUT: Rebase data */
int flags /* SESSION_CHANGESETAPPLY_* flags */
);
SQLITE_API int sqlite3changeset_apply_v3(
sqlite3 *db, /* Apply change to "main" db of this handle */
int nChangeset, /* Size of changeset in bytes */
void *pChangeset, /* Changeset blob */
int(*xFilter)(
void *pCtx, /* Copy of sixth arg to _apply() */
sqlite3_changeset_iter *p /* Handle describing change */
),
int(*xConflict)(
void *pCtx, /* Copy of sixth arg to _apply() */
int eConflict, /* DATA, MISSING, CONFLICT, CONSTRAINT */
sqlite3_changeset_iter *p /* Handle describing change and conflict */
),
void *pCtx, /* First argument passed to xConflict */
void **ppRebase, int *pnRebase, /* OUT: Rebase data */
int flags /* SESSION_CHANGESETAPPLY_* flags */
);
/*
** CAPI3REF: Flags for sqlite3changeset_apply_v2
**
** The following flags may passed via the 9th parameter to
typedef struct sqlite3_rebaser sqlite3_rebaser;
/*
** CAPI3REF: Create a changeset rebaser object.
** EXPERIMENTAL
**
** Allocate a new changeset rebaser object. If successful, set (*ppNew) to
** point to the new object and return SQLITE_OK. Otherwise, if an error
** occurs, return an SQLite error code (e.g. SQLITE_NOMEM) and set (*ppNew)
** to NULL.
*/
SQLITE_API int sqlite3rebaser_create(sqlite3_rebaser **ppNew);
/*
** CAPI3REF: Configure a changeset rebaser object.
** EXPERIMENTAL
**
** Configure the changeset rebaser object to rebase changesets according
** to the conflict resolutions described by buffer pRebase (size nRebase
** bytes), which must have been obtained from a previous call to
** sqlite3changeset_apply_v2().
*/
SQLITE_API int sqlite3rebaser_configure(
sqlite3_rebaser*,
int nRebase, const void *pRebase
);
/*
** CAPI3REF: Rebase a changeset
** EXPERIMENTAL
**
** Argument pIn must point to a buffer containing a changeset nIn bytes
** in size. This function allocates and populates a buffer with a copy
** of the changeset rebased according to the configuration of the
** rebaser object passed as the first argument. If successful, (*ppOut)
** is set to point to the new buffer containing the rebased changeset and
** (*pnOut) to its size in bytes and SQLITE_OK returned. It is the
** responsibility of the caller to eventually free the new buffer using
** sqlite3_free(). Otherwise, if an error occurs, (*ppOut) and (*pnOut)
** are set to zero and an SQLite error code returned.
*/
SQLITE_API int sqlite3rebaser_rebase(
sqlite3_rebaser*,
int nIn, const void *pIn,
int *pnOut, void **ppOut
);
/*
** CAPI3REF: Delete a changeset rebaser object.
** EXPERIMENTAL
**
** Delete the changeset rebaser object and all associated resources. There
** should be one call to this function for each successful invocation
** of sqlite3rebaser_create().
*/
SQLITE_API void sqlite3rebaser_delete(sqlite3_rebaser *p);
/*
** CAPI3REF: Streaming Versions of API functions.
**
** The six streaming API xxx_strm() functions serve similar purposes to the
** corresponding non-streaming API functions:
**
** <table border=1 style="margin-left:8ex;margin-right:8ex">
** <tr><th>Streaming function<th>Non-streaming equivalent</th>
** <tr><td>sqlite3changeset_apply_strm<td>[sqlite3changeset_apply]
** <tr><td>sqlite3changeset_apply_strm_v2<td>[sqlite3changeset_apply_v2]
** <tr><td>sqlite3changeset_concat_strm<td>[sqlite3changeset_concat]
** <tr><td>sqlite3changeset_invert_strm<td>[sqlite3changeset_invert]
** <tr><td>sqlite3changeset_start_strm<td>[sqlite3changeset_start]
** <tr><td>sqlite3session_changeset_strm<td>[sqlite3session_changeset]
** <tr><td>sqlite3session_patchset_strm<td>[sqlite3session_patchset]
** </table>
**
** Non-streaming functions that accept changesets (or patchsets) as input
** require that the entire changeset be stored in a single buffer in memory.
** Similarly, those that return a changeset or patchset do so by returning
** a pointer to a single large buffer allocated using sqlite3_malloc().
** Normally this is convenient. However, if an application running in a
** low-memory environment is required to handle very large changesets, the
** large contiguous memory allocations required can become onerous.
**
** In order to avoid this problem, instead of a single large buffer, input
** is passed to a streaming API functions by way of a callback function that
** the sessions module invokes to incrementally request input data as it is
** required. In all cases, a pair of API function parameters such as
**
** <pre>
** int nChangeset,
** void *pChangeset,
** </pre>
**
** Is replaced by:
**
** <pre>
** int (*xInput)(void *pIn, void *pData, int *pnData),
** void *pIn,
** </pre>
**
** Each time the xInput callback is invoked by the sessions module, the first
** argument passed is a copy of the supplied pIn context pointer. The second
** argument, pData, points to a buffer (*pnData) bytes in size. Assuming no
** error occurs the xInput method should copy up to (*pnData) bytes of data
** into the buffer and set (*pnData) to the actual number of bytes copied
** before returning SQLITE_OK. If the input is completely exhausted, (*pnData)
** should be set to zero to indicate this. Or, if an error occurs, an SQLite
** error code should be returned. In all cases, if an xInput callback returns
** an error, all processing is abandoned and the streaming API function
** returns a copy of the error code to the caller.
**
** In the case of sqlite3changeset_start_strm(), the xInput callback may be
** invoked by the sessions module at any point during the lifetime of the
** iterator. If such an xInput callback returns an error, the iterator enters
** an error state, whereby all subsequent calls to iterator functions
** immediately fail with the same error code as returned by xInput.
**
** Similarly, streaming API functions that return changesets (or patchsets)
** return them in chunks by way of a callback function instead of via a
** pointer to a single large buffer. In this case, a pair of parameters such
** as:
**
** <pre>
** int *pnChangeset,
** void **ppChangeset,
** </pre>
**
** Is replaced by:
**
** <pre>
** int (*xOutput)(void *pOut, const void *pData, int nData),
** void *pOut
** </pre>
**
** The xOutput callback is invoked zero or more times to return data to
** the application. The first parameter passed to each call is a copy of the
** pOut pointer supplied by the application. The second parameter, pData,
** points to a buffer nData bytes in size containing the chunk of output
** data being returned. If the xOutput callback successfully processes the
** supplied data, it should return SQLITE_OK to indicate success. Otherwise,
** it should return some other SQLite error code. In this case processing
** is immediately abandoned and the streaming API function returns a copy
** of the xOutput error code to the application.
**
** The sessions module never invokes an xOutput callback with the third
** parameter set to a value less than or equal to zero. Other than this,
** no guarantees are made as to the size of the chunks of data returned.
*/
SQLITE_API int sqlite3changeset_apply_strm(
sqlite3 *db, /* Apply change to "main" db of this handle */
int (*xInput)(void *pIn, void *pData, int *pnData), /* Input function */
void *pIn, /* First arg for xInput */
int(*xFilter)(
void *pCtx, /* Copy of sixth arg to _apply() */
const char *zTab /* Table name */
),
int(*xConflict)(
void *pCtx, /* Copy of sixth arg to _apply() */
int eConflict, /* DATA, MISSING, CONFLICT, CONSTRAINT */
sqlite3_changeset_iter *p /* Handle describing change and conflict */
),
void *pCtx /* First argument passed to xConflict */
);
SQLITE_API int sqlite3changeset_apply_v2_strm(
sqlite3 *db, /* Apply change to "main" db of this handle */
int (*xInput)(void *pIn, void *pData, int *pnData), /* Input function */
void *pIn, /* First arg for xInput */
int(*xFilter)(
void *pCtx, /* Copy of sixth arg to _apply() */
const char *zTab /* Table name */
),
int(*xConflict)(
void *pCtx, /* Copy of sixth arg to _apply() */
int eConflict, /* DATA, MISSING, CONFLICT, CONSTRAINT */
sqlite3_changeset_iter *p /* Handle describing change and conflict */
),
void *pCtx, /* First argument passed to xConflict */
void **ppRebase, int *pnRebase,
int flags
);
SQLITE_API int sqlite3changeset_apply_v3_strm(
sqlite3 *db, /* Apply change to "main" db of this handle */
int (*xInput)(void *pIn, void *pData, int *pnData), /* Input function */
void *pIn, /* First arg for xInput */
int(*xFilter)(
void *pCtx, /* Copy of sixth arg to _apply() */
sqlite3_changeset_iter *p
),
int(*xConflict)(
void *pCtx, /* Copy of sixth arg to _apply() */
int eConflict, /* DATA, MISSING, CONFLICT, CONSTRAINT */
sqlite3_changeset_iter *p /* Handle describing change and conflict */
),
void *pCtx, /* First argument passed to xConflict */
void **ppRebase, int *pnRebase,
int flags
);
SQLITE_API int sqlite3changeset_concat_strm(
int (*xInputA)(void *pIn, void *pData, int *pnData),
void *pInA,
int (*xInputB)(void *pIn, void *pData, int *pnData),
void *pInB,
int (*xOutput)(void *pOut, const void *pData, int nData),
void *pOut
);
SQLITE_API int sqlite3changeset_start_strm(
sqlite3_changeset_iter **pp,
int (*xInput)(void *pIn, void *pData, int *pnData),
void *pIn
);
SQLITE_API int sqlite3changeset_start_v2_strm(
sqlite3_changeset_iter **pp,
int (*xInput)(void *pIn, void *pData, int *pnData),
void *pIn,
int flags
);
SQLITE_API int sqlite3session_changeset_strm(
sqlite3_session *pSession,
int (*xOutput)(void *pOut, const void *pData, int nData),
void *pOut
);
SQLITE_API int sqlite3session_patchset_strm(
sqlite3_session *pSession,
int (*xOutput)(void *pOut, const void *pData, int nData),
void *pOut
);
SQLITE_API int sqlite3changegroup_add_strm(sqlite3_changegroup*,
int (*xInput)(void *pIn, void *pData, int *pnData),
void *pIn
);
SQLITE_API int sqlite3changegroup_output_strm(sqlite3_changegroup*,
int (*xOutput)(void *pOut, const void *pData, int nData),
void *pOut
);
SQLITE_API int sqlite3rebaser_rebase_strm(
sqlite3_rebaser *pRebaser,
int (*xInput)(void *pIn, void *pData, int *pnData),
void *pIn,
int (*xOutput)(void *pOut, const void *pData, int nData),
void *pOut
);
/*
** CAPI3REF: Configure global parameters
**
** The sqlite3session_config() interface is used to make global configuration
** changes to the sessions module in order to tune it to the specific needs
** of the application.
**
** The sqlite3session_config() interface is not threadsafe. If it is invoked
** while any other thread is inside any other sessions method then the
** results are undefined. Furthermore, if it is invoked after any sessions
** related objects have been created, the results are also undefined.
**
** The first argument to the sqlite3session_config() function must be one
** of the SQLITE_SESSION_CONFIG_XXX constants defined below. The
** interpretation of the (void*) value passed as the second parameter and
** the effect of calling this function depends on the value of the first
** parameter.
**
** <dl>
** <dt>SQLITE_SESSION_CONFIG_STRMSIZE<dd>
** By default, the sessions module streaming interfaces attempt to input
** and output data in approximately 1 KiB chunks. This operand may be used
** to set and query the value of this configuration setting. The pointer
** passed as the second argument must point to a value of type (int).
** If this value is greater than 0, it is used as the new streaming data
** chunk size for both input and output. Before returning, the (int) value
** pointed to by pArg is set to the final value of the streaming interface
** chunk size.
** </dl>
**
** This function returns SQLITE_OK if successful, or an SQLite error code
** otherwise.
*/
SQLITE_API int sqlite3session_config(int op, void *pArg);
/*
** CAPI3REF: Values for sqlite3session_config().
*/
#define SQLITE_SESSION_CONFIG_STRMSIZE 1
/*
** Make sure we can call this stuff from C++.
*/
#ifdef __cplusplus
}
#endif
#endif /* !defined(__SQLITESESSION_H_) && defined(SQLITE_ENABLE_SESSION) */
/******** End of sqlite3session.h *********/
/******** Begin file fts5.h *********/
/*
** 2014 May 31
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
******************************************************************************
**
** Interfaces to extend FTS5. Using the interfaces defined in this file,
** FTS5 may be extended with:
**
** * custom tokenizers, and
** * custom auxiliary functions.
*/
#ifndef _FTS5_H
#define _FTS5_H
#ifdef __cplusplus
extern "C" {
#endif
/*************************************************************************
** CUSTOM AUXILIARY FUNCTIONS
**
** Virtual table implementations may overload SQL functions by implementing
** the sqlite3_module.xFindFunction() method.
*/
typedef struct Fts5ExtensionApi Fts5ExtensionApi;
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