1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
|
/*-
* Copyright (c) 2008-2014 WiredTiger, Inc.
* All rights reserved.
*
* See the file LICENSE for redistribution information.
*/
#include "wt_internal.h"
/*
* __drop_file --
* Drop a file.
*/
static int
__drop_file(
WT_SESSION_IMPL *session, const char *uri, int force, const char *cfg[])
{
WT_CONFIG_ITEM cval;
WT_DECL_RET;
int exist, remove_files;
const char *filename;
WT_RET(__wt_config_gets(session, cfg, "remove_files", &cval));
remove_files = (cval.val != 0);
filename = uri;
if (!WT_PREFIX_SKIP(filename, "file:"))
return (EINVAL);
/* Close all btree handles associated with this file. */
WT_RET(__wt_conn_dhandle_close_all(session, uri));
/* Remove the metadata entry (ignore missing items). */
WT_TRET(__wt_metadata_remove(session, uri));
if (force && ret == WT_NOTFOUND)
ret = 0;
if (!remove_files)
return (ret);
/* Remove the underlying physical file. */
exist = 0;
WT_TRET(__wt_exist(session, filename, &exist));
if (exist) {
/*
* There is no point tracking this operation: there is no going
* back from here.
*/
WT_TRET(__wt_remove(session, filename));
}
return (ret);
}
/*
* __drop_colgroup --
* WT_SESSION::drop for a colgroup.
*/
static int
__drop_colgroup(
WT_SESSION_IMPL *session, const char *uri, const char *cfg[])
{
WT_COLGROUP *colgroup;
WT_DECL_RET;
WT_TABLE *table;
/* If we can get the colgroup, detach it from the table. */
if ((ret = __wt_schema_get_colgroup(
session, uri, &table, &colgroup)) == 0) {
table->cg_complete = 0;
WT_TRET(__wt_schema_drop(session, colgroup->source, cfg));
}
WT_TRET(__wt_metadata_remove(session, uri));
return (ret);
}
/*
* __drop_index --
* WT_SESSION::drop for a colgroup.
*/
static int
__drop_index(
WT_SESSION_IMPL *session, const char *uri, const char *cfg[])
{
WT_INDEX *idx;
WT_DECL_RET;
WT_TABLE *table;
/* If we can get the colgroup, detach it from the table. */
if ((ret = __wt_schema_get_index(session, uri, &table, &idx)) == 0) {
table->idx_complete = 0;
WT_TRET(__wt_schema_drop(session, idx->source, cfg));
}
WT_TRET(__wt_metadata_remove(session, uri));
return (ret);
}
/*
* __drop_table --
* WT_SESSION::drop for a table.
*/
static int
__drop_table(
WT_SESSION_IMPL *session, const char *uri, int force, const char *cfg[])
{
WT_COLGROUP *colgroup;
WT_DECL_RET;
WT_INDEX *idx;
WT_TABLE *table;
const char *name;
u_int i;
name = uri;
(void)WT_PREFIX_SKIP(name, "table:");
table = NULL;
WT_ERR(__wt_schema_get_table(session, name, strlen(name), 1, &table));
/* Drop the column groups. */
for (i = 0; i < WT_COLGROUPS(table); i++) {
if ((colgroup = table->cgroups[i]) == NULL)
continue;
WT_ERR(__wt_metadata_remove(session, colgroup->name));
WT_ERR(__wt_schema_drop(session, colgroup->source, cfg));
}
/* Drop the indices. */
WT_ERR(__wt_schema_open_indices(session, table));
for (i = 0; i < table->nindices; i++) {
if ((idx = table->indices[i]) == NULL)
continue;
WT_ERR(__wt_metadata_remove(session, idx->name));
WT_ERR(__wt_schema_drop(session, idx->source, cfg));
}
__wt_schema_remove_table(session, table);
table = NULL;
/* Remove the metadata entry (ignore missing items). */
WT_ERR(__wt_metadata_remove(session, uri));
err: if (force && ret == WT_NOTFOUND)
ret = 0;
if (table != NULL)
__wt_schema_release_table(session, table);
return (ret);
}
/*
* __wt_schema_drop --
* Process a WT_SESSION::drop operation for all supported types.
*/
int
__wt_schema_drop(WT_SESSION_IMPL *session, const char *uri, const char *cfg[])
{
WT_CONFIG_ITEM cval;
WT_DATA_SOURCE *dsrc;
WT_DECL_RET;
int force;
WT_RET(__wt_config_gets_def(session, cfg, "force", 0, &cval));
force = (cval.val != 0);
WT_RET(__wt_meta_track_on(session));
/* Be careful to ignore any btree handle in our caller. */
WT_CLEAR_BTREE_IN_SESSION(session);
if (WT_PREFIX_MATCH(uri, "colgroup:"))
ret = __drop_colgroup(session, uri, cfg);
else if (WT_PREFIX_MATCH(uri, "file:"))
ret = __drop_file(session, uri, force, cfg);
else if (WT_PREFIX_MATCH(uri, "index:"))
ret = __drop_index(session, uri, cfg);
else if (WT_PREFIX_MATCH(uri, "lsm:"))
ret = __wt_lsm_tree_drop(session, uri, cfg);
else if (WT_PREFIX_MATCH(uri, "table:"))
ret = __drop_table(session, uri, force, cfg);
else if ((dsrc = __wt_schema_get_source(session, uri)) != NULL)
ret = dsrc->drop == NULL ?
__wt_object_unsupported(session, uri) :
dsrc->drop(
dsrc, &session->iface, uri, (WT_CONFIG_ARG *)cfg);
else
ret = __wt_bad_object_type(session, uri);
/*
* Map WT_NOTFOUND to ENOENT (or to 0 if "force" is set), based on the
* assumption WT_NOTFOUND means there was no metadata entry. The
* underlying drop functions should handle this case (we passed them
* the "force" value), but better safe than sorry.
*/
if (ret == WT_NOTFOUND)
ret = force ? 0 : ENOENT;
/* Bump the schema generation so that stale data is ignored. */
++S2C(session)->schema_gen;
WT_TRET(__wt_meta_track_off(session, ret != 0));
return (ret);
}
|
