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
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
|
/*
** 2014-07-28
**
** 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.
**
*************************************************************************
**
** This file implements a utility program that will load many disk
** files (all files under a given directory) into a FTS table. This is
** used for performance testing of FTS3, FTS4, and FTS5.
*/
#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <assert.h>
#include <string.h>
#include <errno.h>
#include <dirent.h>
#include "sqlite3.h"
/*
** Implementation of the "readtext(X)" SQL function. The entire content
** of the file named X is read and returned as a TEXT value. It is assumed
** the file contains UTF-8 text. NULL is returned if the file does not
** exist or is unreadable.
*/
static void readfileFunc(
sqlite3_context *context,
int argc,
sqlite3_value **argv
){
const char *zName;
FILE *in;
long nIn;
void *pBuf;
zName = (const char*)sqlite3_value_text(argv[0]);
if( zName==0 ) return;
in = fopen(zName, "rb");
if( in==0 ) return;
fseek(in, 0, SEEK_END);
nIn = ftell(in);
rewind(in);
pBuf = sqlite3_malloc( nIn );
if( pBuf && 1==fread(pBuf, nIn, 1, in) ){
sqlite3_result_text(context, pBuf, nIn, sqlite3_free);
}else{
sqlite3_free(pBuf);
}
fclose(in);
}
/*
** Print usage text for this program and exit.
*/
static void showHelp(const char *zArgv0){
printf("\n"
"Usage: %s SWITCHES... DB\n"
"\n"
" This program opens the database named on the command line and attempts to\n"
" create an FTS table named \"fts\" with a single column. If successful, it\n"
" recursively traverses the directory named by the -dir option and inserts\n"
" the contents of each file into the fts table. All files are assumed to\n"
" contain UTF-8 text.\n"
"\n"
"Switches are:\n"
" -fts [345] FTS version to use (default=5)\n"
" -idx [01] Create a mapping from filename to rowid (default=0)\n"
" -dir <path> Root of directory tree to load data from (default=.)\n"
" -trans <integer> Number of inserts per transaction (default=1)\n"
, zArgv0
);
exit(1);
}
/*
** Exit with a message based on the argument and the current value of errno.
*/
static void error_out(const char *zText){
fprintf(stderr, "%s: %s\n", zText, strerror(errno));
exit(-1);
}
/*
** Exit with a message based on the first argument and the error message
** currently stored in database handle db.
*/
static void sqlite_error_out(const char *zText, sqlite3 *db){
fprintf(stderr, "%s: %s\n", zText, sqlite3_errmsg(db));
exit(-1);
}
/*
** Context object for visit_file().
*/
typedef struct VisitContext VisitContext;
struct VisitContext {
int nRowPerTrans;
sqlite3 *db; /* Database handle */
sqlite3_stmt *pInsert; /* INSERT INTO fts VALUES(readtext(:1)) */
};
/*
** Callback used with traverse(). The first argument points to an object
** of type VisitContext. This function inserts the contents of the text
** file zPath into the FTS table.
*/
void visit_file(void *pCtx, const char *zPath){
int rc;
VisitContext *p = (VisitContext*)pCtx;
/* printf("%s\n", zPath); */
sqlite3_bind_text(p->pInsert, 1, zPath, -1, SQLITE_STATIC);
sqlite3_step(p->pInsert);
rc = sqlite3_reset(p->pInsert);
if( rc!=SQLITE_OK ){
sqlite_error_out("insert", p->db);
}else if( p->nRowPerTrans>0
&& (sqlite3_last_insert_rowid(p->db) % p->nRowPerTrans)==0
){
sqlite3_exec(p->db, "COMMIT ; BEGIN", 0, 0, 0);
}
}
/*
** Recursively traverse directory zDir. For each file that is not a
** directory, invoke the supplied callback with its path.
*/
static void traverse(
const char *zDir, /* Directory to traverse */
void *pCtx, /* First argument passed to callback */
void (*xCallback)(void*, const char *zPath)
){
DIR *d;
struct dirent *e;
d = opendir(zDir);
if( d==0 ) error_out("opendir()");
for(e=readdir(d); e; e=readdir(d)){
if( strcmp(e->d_name, ".")==0 || strcmp(e->d_name, "..")==0 ) continue;
char *zPath = sqlite3_mprintf("%s/%s", zDir, e->d_name);
if (e->d_type & DT_DIR) {
traverse(zPath, pCtx, xCallback);
}else{
xCallback(pCtx, zPath);
}
sqlite3_free(zPath);
}
closedir(d);
}
int main(int argc, char **argv){
int iFts = 5; /* Value of -fts option */
int bMap = 0; /* True to create mapping table */
const char *zDir = "."; /* Directory to scan */
int i;
int rc;
int nRowPerTrans = 0;
sqlite3 *db;
char *zSql;
VisitContext sCtx;
int nCmd = 0;
char **aCmd = 0;
if( argc % 2 ) showHelp(argv[0]);
for(i=1; i<(argc-1); i+=2){
char *zOpt = argv[i];
char *zArg = argv[i+1];
if( strcmp(zOpt, "-fts")==0 ){
iFts = atoi(zArg);
if( iFts!=3 && iFts!=4 && iFts!= 5) showHelp(argv[0]);
}
else if( strcmp(zOpt, "-trans")==0 ){
nRowPerTrans = atoi(zArg);
}
else if( strcmp(zOpt, "-idx")==0 ){
bMap = atoi(zArg);
if( bMap!=0 && bMap!=1 ) showHelp(argv[0]);
}
else if( strcmp(zOpt, "-dir")==0 ){
zDir = zArg;
}
else if( strcmp(zOpt, "-special")==0 ){
nCmd++;
aCmd = sqlite3_realloc(aCmd, sizeof(char*) * nCmd);
aCmd[nCmd-1] = zArg;
}
else{
showHelp(argv[0]);
}
}
/* Open the database file */
rc = sqlite3_open(argv[argc-1], &db);
if( rc!=SQLITE_OK ) sqlite_error_out("sqlite3_open()", db);
rc = sqlite3_create_function(db, "readtext", 1, SQLITE_UTF8, 0,
readfileFunc, 0, 0);
if( rc!=SQLITE_OK ) sqlite_error_out("sqlite3_create_function()", db);
/* Create the FTS table */
zSql = sqlite3_mprintf("CREATE VIRTUAL TABLE fts USING fts%d(content)", iFts);
rc = sqlite3_exec(db, zSql, 0, 0, 0);
if( rc!=SQLITE_OK ) sqlite_error_out("sqlite3_exec(1)", db);
sqlite3_free(zSql);
for(i=0; i<nCmd; i++){
zSql = sqlite3_mprintf("INSERT INTO fts(fts) VALUES(%Q)", aCmd[i]);
rc = sqlite3_exec(db, zSql, 0, 0, 0);
if( rc!=SQLITE_OK ) sqlite_error_out("sqlite3_exec(1)", db);
sqlite3_free(zSql);
}
/* Compile the INSERT statement to write data to the FTS table. */
memset(&sCtx, 0, sizeof(VisitContext));
sCtx.db = db;
sCtx.nRowPerTrans = nRowPerTrans;
rc = sqlite3_prepare_v2(db,
"INSERT INTO fts VALUES(readtext(?))", -1, &sCtx.pInsert, 0
);
if( rc!=SQLITE_OK ) sqlite_error_out("sqlite3_prepare_v2(1)", db);
/* Load all files in the directory hierarchy into the FTS table. */
if( sCtx.nRowPerTrans>0 ) sqlite3_exec(db, "BEGIN", 0, 0, 0);
traverse(zDir, (void*)&sCtx, visit_file);
if( sCtx.nRowPerTrans>0 ) sqlite3_exec(db, "COMMIT", 0, 0, 0);
/* Clean up and exit. */
sqlite3_finalize(sCtx.pInsert);
sqlite3_close(db);
sqlite3_free(aCmd);
return 0;
}
|
