/*
* __wt_schema_rename --
* WT_SESSION::rename.
*/
int
__wt_schema_rename(WT_SESSION_IMPL *session,
const char *uri, const char *newuri, const char *cfg[])
{
WT_DATA_SOURCE *dsrc;
WT_DECL_RET;
const char *p, *t;
/* Disallow renames to/from the WiredTiger name space. */
WT_RET(__wt_schema_name_check(session, uri));
WT_RET(__wt_schema_name_check(session, newuri));
/* The target type must match the source type. */
for (p = uri, t = newuri; *p == *t && *p != ':'; ++p, ++t)
;
if (*p != ':' || *t != ':')
WT_RET_MSG(session, EINVAL,
"rename target type must match URI: %s to %s", uri, newuri);
/*
* We track rename operations, if we fail in the middle, we want to
* back it all out.
*/
WT_RET(__wt_meta_track_on(session));
if (WT_PREFIX_MATCH(uri, "file:"))
ret = __rename_file(session, uri, newuri);
else if (WT_PREFIX_MATCH(uri, "lsm:"))
ret = __wt_lsm_tree_rename(session, uri, newuri, cfg);
else if (WT_PREFIX_MATCH(uri, "table:"))
ret = __rename_table(session, uri, newuri, cfg);
else if ((ret = __wt_schema_get_source(session, uri, &dsrc)) == 0)
ret = dsrc->rename == NULL ?
__wt_object_unsupported(session, uri) :
dsrc->rename(dsrc, &session->iface,
uri, newuri, (WT_CONFIG_ARG *)cfg);
/* Bump the schema generation so that stale data is ignored. */
++S2C(session)->schema_gen;
WT_TRET(__wt_meta_track_off(session, ret != 0));
/* If we didn't find a metadata entry, map that error to ENOENT. */
return (ret == WT_NOTFOUND ? ENOENT : ret);
}
/*
* __wt_schema_rename --
* WT_SESSION::rename.
*/
int
__wt_schema_rename(WT_SESSION_IMPL *session,
const char *uri, const char *newuri, const char *cfg[])
{
WT_DATA_SOURCE *dsrc;
WT_DECL_RET;
const char *oldname, *newname;
WT_UNUSED(cfg);
/* Disallow renames to/from the WiredTiger name space. */
WT_RET(__wt_schema_name_check(session, uri));
WT_RET(__wt_schema_name_check(session, newuri));
/*
* We track rename operations, if we fail in the middle, we want to
* back it all out.
*/
WT_RET(__wt_meta_track_on(session));
oldname = uri;
newname = newuri;
if (WT_PREFIX_SKIP(oldname, "file:")) {
if (!WT_PREFIX_SKIP(newname, "file:"))
WT_RET_MSG(session, EINVAL,
"rename target type must match URI: %s to %s",
uri, newuri);
ret = __rename_file(session, uri, newuri);
} else if (WT_PREFIX_SKIP(oldname, "table:")) {
if (!WT_PREFIX_SKIP(newname, "table:"))
WT_RET_MSG(session, EINVAL,
"rename target type must match URI: %s to %s",
uri, newuri);
ret = __rename_table(session, oldname, newname);
} else if ((ret = __wt_schema_get_source(session, oldname, &dsrc)) == 0)
ret = dsrc->rename(dsrc,
&session->iface, oldname, newname, cfg[1]);
WT_TRET(__wt_meta_track_off(session, ret != 0));
/* If we didn't find a metadata entry, map that error to ENOENT. */
return (ret == WT_NOTFOUND ? ENOENT : ret);
}
/*
* __rename_tree --
* Rename an index or colgroup reference.
*/
static int
__rename_tree(WT_SESSION_IMPL *session, const char *name, const char *newname)
{
WT_DECL_RET;
WT_ITEM *of, *nf, *nk, *nv;
const char *newfile, *p, *t, *value;
nf = nk = nv = of = NULL;
/* Read the old schema value. */
WT_ERR(__wt_metadata_read(session, name, &value));
/*
* Create the new file name, new schema key, new schema value.
*
* Names are of the form "prefix.oldname:suffix", where suffix is
* optional; we need prefix and suffix.
*/
if ((p = strchr(name, ':')) == NULL)
WT_ERR_MSG(session, EINVAL,
"invalid index or column-group name: %s", name);
t = strchr(p + 1, ':');
WT_ERR(__wt_scr_alloc(session, 0, &nf));
WT_ERR(__wt_buf_fmt(session, nf, "file:%s%s%s.wt", newname,
t == NULL ? "" : "_", t == NULL ? "" : t + 1));
newfile = (const char *)nf->data + strlen("file:");
WT_ERR(__wt_scr_alloc(session, 0, &nk));
WT_ERR(__wt_buf_fmt(session, nk, "%.*s:%s%s%s",
(int)WT_PTRDIFF(p, name), name, newname,
t == NULL ? "" : ":", t == NULL ? "" : t + 1));
if ((p = strstr(value, "filename=")) == NULL)
WT_ERR_MSG(session, EINVAL,
"index or column-group value has no file name: %s", value);
p += strlen("filename=");
t = strchr(p, ',');
/* Take a copy of the old filename. */
WT_ERR(__wt_scr_alloc(session, 0, &of));
WT_ERR(__wt_buf_fmt(session, of, "file:%.*s",
(int)((t == NULL) ? strlen(p) : WT_PTRDIFF(t, p)), p));
/* Overwrite it with the new filename. */
WT_ERR(__wt_scr_alloc(session, 0, &nv));
WT_ERR(__wt_buf_fmt(session, nv, "%.*s%s%s",
(int)WT_PTRDIFF(p, value), value,
newfile, t == NULL ? "" : t));
/*
* Remove the old metadata entry.
* Insert the new metadata entry.
*/
WT_ERR(__wt_metadata_remove(session, name));
WT_ERR(__wt_metadata_insert(session, nk->data, nv->data));
/* Rename the file. */
WT_ERR(__rename_file(session, of->data, nf->data));
err: __wt_scr_free(&nf);
__wt_scr_free(&nk);
__wt_scr_free(&nv);
__wt_scr_free(&of);
__wt_free(session, value);
return (ret);
}
