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Add the fts3view utility program.
FossilOrigin-Name: f936c8ea16d21345fd1622272dc7e9850acb2493
This commit is contained in:
drh
562
ext/fts3/tool/fts3view.c
Normal file
562
ext/fts3/tool/fts3view.c
Normal file
@ -0,0 +1,562 @@
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/*
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** This program is a debugging and analysis utility that displays
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** information about an FTS3 or FTS4 index.
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**
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** Link this program against the SQLite3 amalgamation with the
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** SQLITE_ENABLE_FTS4 compile-time option. Then run it as:
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**
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** fts3view DATABASE
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**
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** to get a list of all FTS3/4 tables in DATABASE, or do
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**
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** fts3view DATABASE TABLE COMMAND ....
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**
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** to see various aspects of the TABLE table. Type fts3view with no
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** arguments for a list of available COMMANDs.
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*/
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include "sqlite3.h"
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/*
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** Extra command-line arguments:
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*/
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int nExtra;
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char **azExtra;
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/*
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** Look for a command-line argument.
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*/
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const char *findOption(const char *zName, int hasArg, const char *zDefault){
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int i;
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const char *zResult = zDefault;
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for(i=0; i<nExtra; i++){
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const char *z = azExtra[i];
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while( z[0]=='-' ) z++;
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if( strcmp(z, zName)==0 ){
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int j = 1;
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if( hasArg==0 || i==nExtra-1 ) j = 0;
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zResult = azExtra[i+j];
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while( i+j<nExtra ){
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azExtra[i] = azExtra[i+j+1];
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i++;
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}
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break;
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}
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}
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return zResult;
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}
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/*
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** Prepare an SQL query
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*/
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static sqlite3_stmt *prepare(sqlite3 *db, const char *zFormat, ...){
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va_list ap;
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char *zSql;
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sqlite3_stmt *pStmt;
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int rc;
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va_start(ap, zFormat);
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zSql = sqlite3_vmprintf(zFormat, ap);
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va_end(ap);
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rc = sqlite3_prepare_v2(db, zSql, -1, &pStmt, 0);
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if( rc ){
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fprintf(stderr, "Error: %s\nSQL: %s\n", sqlite3_errmsg(db), zSql);
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exit(1);
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}
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sqlite3_free(zSql);
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return pStmt;
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}
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/*
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** Run an SQL statement
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*/
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static void runSql(sqlite3 *db, const char *zFormat, ...){
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va_list ap;
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char *zSql;
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va_start(ap, zFormat);
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zSql = sqlite3_vmprintf(zFormat, ap);
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sqlite3_exec(db, zSql, 0, 0, 0);
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va_end(ap);
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}
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/*
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** Show the table schema
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*/
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static void showSchema(sqlite3 *db, const char *zTab){
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sqlite3_stmt *pStmt;
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pStmt = prepare(db,
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"SELECT sql FROM sqlite_master"
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" WHERE name LIKE '%q%%'"
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" ORDER BY 1",
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zTab);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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printf("%s;\n", sqlite3_column_text(pStmt, 0));
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}
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sqlite3_finalize(pStmt);
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pStmt = prepare(db, "PRAGMA page_size");
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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printf("PRAGMA page_size=%s;\n", sqlite3_column_text(pStmt, 0));
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}
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sqlite3_finalize(pStmt);
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pStmt = prepare(db, "PRAGMA journal_mode");
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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printf("PRAGMA journal_mode=%s;\n", sqlite3_column_text(pStmt, 0));
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}
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sqlite3_finalize(pStmt);
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}
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/*
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** Read a 64-bit variable-length integer from memory starting at p[0].
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** Return the number of bytes read, or 0 on error.
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** The value is stored in *v.
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*/
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int getVarint(const unsigned char *p, sqlite_int64 *v){
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const unsigned char *q = p;
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sqlite_uint64 x = 0, y = 1;
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while( (*q&0x80)==0x80 && q-(unsigned char *)p<9 ){
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x += y * (*q++ & 0x7f);
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y <<= 7;
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}
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x += y * (*q++);
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*v = (sqlite_int64) x;
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return (int) (q - (unsigned char *)p);
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}
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/* Show the content of the %_stat table
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*/
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static void showStat(sqlite3 *db, const char *zTab){
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sqlite3_stmt *pStmt;
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pStmt = prepare(db, "SELECT id, value FROM '%q_stat'", zTab);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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printf("stat[%d] =", sqlite3_column_int(pStmt, 0));
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switch( sqlite3_column_type(pStmt, 1) ){
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case SQLITE_INTEGER: {
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printf(" %d\n", sqlite3_column_int(pStmt, 1));
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break;
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}
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case SQLITE_BLOB: {
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unsigned char *x = (unsigned char*)sqlite3_column_blob(pStmt, 1);
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int len = sqlite3_column_bytes(pStmt, 1);
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int i = 0;
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sqlite3_int64 v;
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while( i<len ){
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i += getVarint(x, &v);
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printf(" %lld", v);
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}
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printf("\n");
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break;
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}
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}
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}
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sqlite3_finalize(pStmt);
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}
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/*
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** Report on the vocabulary. This creates an fts4aux table with a random
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** name, but deletes it in the end.
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*/
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static void showVocabulary(sqlite3 *db, const char *zTab){
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char *zAux;
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sqlite3_uint64 r;
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sqlite3_stmt *pStmt;
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int nDoc = 0;
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int nToken = 0;
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int nOccurrence = 0;
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int nTop;
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int n, i;
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sqlite3_randomness(sizeof(r), &r);
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zAux = sqlite3_mprintf("viewer_%llx", zTab, r);
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runSql(db, "BEGIN");
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pStmt = prepare(db, "SELECT count(*) FROM %Q", zTab);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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nDoc = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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printf("Number of documents...................... %9d\n", nDoc);
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runSql(db, "CREATE VIRTUAL TABLE %s USING fts4aux(%Q)", zAux, zTab);
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pStmt = prepare(db,
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"SELECT count(*), sum(occurrences) FROM %s WHERE col='*'",
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zAux);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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nToken = sqlite3_column_int(pStmt, 0);
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nOccurrence = sqlite3_column_int(pStmt, 1);
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}
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sqlite3_finalize(pStmt);
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printf("Total tokens in all documents............ %9d\n", nOccurrence);
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printf("Total number of distinct tokens.......... %9d\n", nToken);
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if( nToken==0 ) goto end_vocab;
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n = 0;
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pStmt = prepare(db, "SELECT count(*) FROM %s"
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" WHERE col='*' AND occurrences==1", zAux);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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n = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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printf("Tokens used exactly once................. %9d %5.2f%%\n",
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n, n*100.0/nToken);
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n = 0;
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pStmt = prepare(db, "SELECT count(*) FROM %s"
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" WHERE col='*' AND documents==1", zAux);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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n = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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printf("Tokens used in only one document......... %9d %5.2f%%\n",
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n, n*100.0/nToken);
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if( nDoc>=2000 ){
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n = 0;
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pStmt = prepare(db, "SELECT count(*) FROM %s"
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" WHERE col='*' AND occurrences<=%d", zAux, nDoc/1000);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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n = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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printf("Tokens used in 0.1%% or less of docs...... %9d %5.2f%%\n",
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n, n*100.0/nToken);
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}
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if( nDoc>=200 ){
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n = 0;
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pStmt = prepare(db, "SELECT count(*) FROM %s"
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" WHERE col='*' AND occurrences<=%d", zAux, nDoc/100);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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n = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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printf("Tokens used in 1%% or less of docs........ %9d %5.2f%%\n",
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n, n*100.0/nToken);
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}
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nTop = atoi(findOption("top", 1, "25"));
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printf("The %d most common tokens:\n", nTop);
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pStmt = prepare(db,
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"SELECT term, documents FROM %s"
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" WHERE col='*'"
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" ORDER BY documents DESC, term"
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" LIMIT %d", zAux, nTop);
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i = 0;
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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i++;
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n = sqlite3_column_int(pStmt, 1);
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printf(" %2d. %-30s %9d docs %5.2f%%\n", i,
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sqlite3_column_text(pStmt, 0), n, n*100.0/nDoc);
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}
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sqlite3_finalize(pStmt);
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end_vocab:
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runSql(db, "ROLLBACK");
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sqlite3_free(zAux);
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}
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/*
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** Report on the number and sizes of segments
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*/
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static void showSegmentStats(sqlite3 *db, const char *zTab){
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sqlite3_stmt *pStmt;
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int nSeg = 0;
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sqlite3_int64 szSeg = 0, mxSeg = 0;
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int nIdx = 0;
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sqlite3_int64 szIdx = 0, mxIdx = 0;
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int nRoot = 0;
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sqlite3_int64 szRoot = 0, mxRoot = 0;
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sqlite3_int64 mx;
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int nLeaf;
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int n;
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int pgsz;
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int mxLevel;
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int i;
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pStmt = prepare(db,
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"SELECT count(*), sum(length(block)), max(length(block))"
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" FROM '%q_segments'",
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zTab);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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nSeg = sqlite3_column_int(pStmt, 0);
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szSeg = sqlite3_column_int64(pStmt, 1);
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mxSeg = sqlite3_column_int64(pStmt, 2);
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}
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sqlite3_finalize(pStmt);
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pStmt = prepare(db,
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"SELECT count(*), sum(length(block)), max(length(block))"
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" FROM '%q_segments' a JOIN '%q_segdir' b"
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" WHERE a.blockid BETWEEN b.leaves_end_block+1 AND b.end_block",
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zTab, zTab);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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nIdx = sqlite3_column_int(pStmt, 0);
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szIdx = sqlite3_column_int64(pStmt, 1);
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mxIdx = sqlite3_column_int64(pStmt, 2);
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}
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sqlite3_finalize(pStmt);
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pStmt = prepare(db,
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"SELECT count(*), sum(length(root)), max(length(root))"
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" FROM '%q_segdir'",
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zTab);
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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nRoot = sqlite3_column_int(pStmt, 0);
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szRoot = sqlite3_column_int64(pStmt, 1);
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mxRoot = sqlite3_column_int64(pStmt, 2);
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}
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sqlite3_finalize(pStmt);
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printf("Number of segments....................... %9d\n", nSeg+nRoot);
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printf("Number of leaf segments.................. %9d\n", nSeg-nIdx);
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printf("Number of index segments................. %9d\n", nIdx);
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printf("Number of root segments.................. %9d\n", nRoot);
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printf("Total size of all segments............... %9lld\n", szSeg+szRoot);
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printf("Total size of all leaf segments.......... %9lld\n", szSeg-szIdx);
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printf("Total size of all index segments......... %9lld\n", szIdx);
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printf("Total size of all root segments.......... %9lld\n", szRoot);
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if( nSeg>0 ){
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printf("Average size of all segments............. %11.1f\n",
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(double)(szSeg+szRoot)/(double)(nSeg+nRoot));
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printf("Average size of leaf segments............ %11.1f\n",
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(double)(szSeg-szIdx)/(double)(nSeg-nIdx));
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}
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if( nIdx>0 ){
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printf("Average size of index segments........... %11.1f\n",
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(double)szIdx/(double)nIdx);
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}
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if( nRoot>0 ){
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printf("Average size of root segments............ %11.1f\n",
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(double)szRoot/(double)nRoot);
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}
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mx = mxSeg;
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if( mx<mxRoot ) mx = mxRoot;
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printf("Maximum segment size..................... %9lld\n", mx);
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printf("Maximum index segment size............... %9lld\n", mxIdx);
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printf("Maximum root segment size................ %9lld\n", mxRoot);
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pStmt = prepare(db, "PRAGMA page_size");
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pgsz = 1024;
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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pgsz = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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printf("Database page size....................... %9d\n", pgsz);
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pStmt = prepare(db,
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"SELECT count(*)"
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" FROM '%q_segments' a JOIN '%q_segdir' b"
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" WHERE a.blockid BETWEEN b.start_block AND b.leaves_end_block"
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" AND length(a.block)>%d",
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zTab, zTab, pgsz-45);
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n = 0;
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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n = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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nLeaf = nSeg - nIdx;
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printf("Leaf segments larger than %5d bytes.... %9d %5.2f%%\n",
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pgsz-45, n, n*100.0/nLeaf);
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pStmt = prepare(db, "SELECT max(level%%1024) FROM '%q_segdir'", zTab);
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mxLevel = 0;
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while( sqlite3_step(pStmt)==SQLITE_ROW ){
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mxLevel = sqlite3_column_int(pStmt, 0);
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}
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sqlite3_finalize(pStmt);
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for(i=0; i<=mxLevel; i++){
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pStmt = prepare(db,
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"SELECT count(*), sum(len), avg(len), max(len), sum(len>%d),"
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" count(distinct idx)"
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" FROM (SELECT length(a.block) AS len, idx"
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" FROM '%q_segments' a JOIN '%q_segdir' b"
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" WHERE (a.blockid BETWEEN b.start_block"
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" AND b.leaves_end_block)"
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" AND (b.level%%1024)==%d)",
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pgsz-45, zTab, zTab, i);
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if( sqlite3_step(pStmt)==SQLITE_ROW
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&& (nLeaf = sqlite3_column_int(pStmt, 0))>0
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){
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int nIdx = sqlite3_column_int(pStmt, 5);
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sqlite3_int64 sz;
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printf("For level %d:\n", i);
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printf(" Number of indexes...................... %9d\n", nIdx);
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printf(" Number of leaf segments................ %9d\n", nLeaf);
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if( nIdx>1 ){
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printf(" Average leaf segments per index........ %11.1f\n",
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(double)nLeaf/(double)nIdx);
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}
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printf(" Total size of all leaf segments........ %9lld\n",
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(sz = sqlite3_column_int64(pStmt, 1)));
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printf(" Average size of leaf segments.......... %11.1f\n",
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sqlite3_column_double(pStmt, 2));
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if( nIdx>1 ){
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printf(" Average leaf segment size per index.... %11.1f\n",
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(double)sz/(double)nIdx);
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}
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||||
printf(" Maximum leaf segment size.............. %9lld\n",
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sqlite3_column_int64(pStmt, 3));
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n = sqlite3_column_int(pStmt, 4);
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printf(" Leaf segments larger than %5d bytes.. %9d %5.2f%%\n",
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pgsz-45, n, n*100.0/nLeaf);
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}
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sqlite3_finalize(pStmt);
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}
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||||
}
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||||
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||||
/*
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||||
** Print a single "tree" line of the segdir map output.
|
||||
*/
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||||
static void printTreeLine(sqlite3_int64 iLower, sqlite3_int64 iUpper){
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||||
printf(" tree %9lld", iLower);
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if( iUpper>iLower ){
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printf(" thru %9lld (%lld blocks)", iUpper, iUpper-iLower+1);
|
||||
}
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||||
printf("\n");
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||||
}
|
||||
|
||||
/*
|
||||
** Show a map of segments derived from the %_segdir table.
|
||||
*/
|
||||
static void showSegdirMap(sqlite3 *db, const char *zTab){
|
||||
int mxIndex, iIndex;
|
||||
sqlite3_stmt *pStmt = 0;
|
||||
sqlite3_stmt *pStmt2 = 0;
|
||||
int prevLevel;
|
||||
|
||||
pStmt = prepare(db, "SELECT max(level/1024) FROM '%q_segdir'", zTab);
|
||||
if( sqlite3_step(pStmt)==SQLITE_ROW ){
|
||||
mxIndex = sqlite3_column_int(pStmt, 0);
|
||||
}else{
|
||||
mxIndex = 0;
|
||||
}
|
||||
sqlite3_finalize(pStmt);
|
||||
|
||||
printf("Number of inverted indices............... %3d\n", mxIndex+1);
|
||||
pStmt = prepare(db,
|
||||
"SELECT level, idx, start_block, leaves_end_block, end_block"
|
||||
" FROM '%q_segdir'"
|
||||
" WHERE level/1024==?"
|
||||
" ORDER BY level DESC, idx",
|
||||
zTab);
|
||||
pStmt2 = prepare(db,
|
||||
"SELECT blockid FROM '%q_segments'"
|
||||
" WHERE blockid BETWEEN ? AND ? ORDER BY blockid",
|
||||
zTab);
|
||||
for(iIndex=0; iIndex<=mxIndex; iIndex++){
|
||||
if( mxIndex>0 ){
|
||||
printf("**************************** Index %d "
|
||||
"****************************\n", iIndex);
|
||||
}
|
||||
sqlite3_bind_int(pStmt, 1, iIndex);
|
||||
prevLevel = -1;
|
||||
while( sqlite3_step(pStmt)==SQLITE_ROW ){
|
||||
int iLevel = sqlite3_column_int(pStmt, 0)%1024;
|
||||
int iIdx = sqlite3_column_int(pStmt, 1);
|
||||
sqlite3_int64 iStart = sqlite3_column_int64(pStmt, 2);
|
||||
sqlite3_int64 iLEnd = sqlite3_column_int64(pStmt, 3);
|
||||
sqlite3_int64 iEnd = sqlite3_column_int64(pStmt, 4);
|
||||
if( iLevel!=prevLevel ){
|
||||
printf("level %2d idx %2d", iLevel, iIdx);
|
||||
prevLevel = iLevel;
|
||||
}else{
|
||||
printf(" idx %2d", iIdx);
|
||||
}
|
||||
if( iLEnd>iStart ){
|
||||
sqlite3_int64 iLower, iPrev, iX;
|
||||
printf(" leaves %9lld thru %9lld (%lld blocks)\n",
|
||||
iStart, iLEnd, iLEnd - iStart + 1);
|
||||
if( iLEnd+1<=iEnd ){
|
||||
sqlite3_bind_int64(pStmt2, 1, iLEnd+1);
|
||||
sqlite3_bind_int64(pStmt2, 2, iEnd);
|
||||
iLower = -1;
|
||||
while( sqlite3_step(pStmt2)==SQLITE_ROW ){
|
||||
iX = sqlite3_column_int64(pStmt2, 0);
|
||||
if( iLower<0 ){
|
||||
iLower = iPrev = iX;
|
||||
}else if( iX==iPrev+1 ){
|
||||
iPrev = iX;
|
||||
}else{
|
||||
printTreeLine(iLower, iPrev);
|
||||
iLower = iPrev = iX;
|
||||
}
|
||||
}
|
||||
sqlite3_reset(pStmt2);
|
||||
if( iLower>=0 ) printTreeLine(iLower, iPrev);
|
||||
}
|
||||
}else{
|
||||
printf(" root only\n");
|
||||
}
|
||||
}
|
||||
sqlite3_reset(pStmt);
|
||||
}
|
||||
sqlite3_finalize(pStmt);
|
||||
sqlite3_finalize(pStmt2);
|
||||
}
|
||||
|
||||
|
||||
static void usage(const char *argv0){
|
||||
fprintf(stderr, "Usage: %s DATABASE\n"
|
||||
" or: %s DATABASE FTS3TABLE ARGS...\n", argv0, argv0);
|
||||
fprintf(stderr,
|
||||
"ARGS:\n"
|
||||
" schema FTS table schema\n"
|
||||
" segdir directory of segments\n"
|
||||
" segment-stats information about segment sizes\n"
|
||||
" stat content of the %%_stat table\n"
|
||||
" vocabulary --top N information on the document vocabulary\n"
|
||||
);
|
||||
exit(1);
|
||||
}
|
||||
|
||||
int main(int argc, char **argv){
|
||||
sqlite3 *db;
|
||||
int rc;
|
||||
const char *zTab;
|
||||
const char *zCmd;
|
||||
if( argc<2 ) usage(argv[0]);
|
||||
rc = sqlite3_open(argv[1], &db);
|
||||
if( rc ){
|
||||
fprintf(stderr, "Cannot open %s\n", argv[1]);
|
||||
exit(1);
|
||||
}
|
||||
if( argc==2 ){
|
||||
sqlite3_stmt *pStmt;
|
||||
int cnt = 0;
|
||||
pStmt = prepare(db, "SELECT b.sql"
|
||||
" FROM sqlite_master a, sqlite_master b"
|
||||
" WHERE a.name GLOB '*_segdir'"
|
||||
" AND b.name=substr(a.name,1,length(a.name)-7)"
|
||||
" ORDER BY 1");
|
||||
while( sqlite3_step(pStmt)==SQLITE_ROW ){
|
||||
cnt++;
|
||||
printf("%s;\n", sqlite3_column_text(pStmt, 0));
|
||||
}
|
||||
sqlite3_finalize(pStmt);
|
||||
if( cnt==0 ){
|
||||
printf("/* No FTS3/4 tables found in database %s */\n", argv[1]);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
if( argc<4 ) usage(argv[0]);
|
||||
zTab = argv[2];
|
||||
zCmd = argv[3];
|
||||
nExtra = argc-4;
|
||||
azExtra = argv+4;
|
||||
if( strcmp(zCmd,"schema")==0 ){
|
||||
showSchema(db, zTab);
|
||||
}else if( strcmp(zCmd,"segdir")==0 ){
|
||||
showSegdirMap(db, zTab);
|
||||
}else if( strcmp(zCmd,"segment-stats")==0 ){
|
||||
showSegmentStats(db, zTab);
|
||||
}else if( strcmp(zCmd,"stat")==0 ){
|
||||
showStat(db, zTab);
|
||||
}else if( strcmp(zCmd,"vocabulary")==0 ){
|
||||
showVocabulary(db, zTab);
|
||||
}else{
|
||||
usage(argv[0]);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
Reference in New Issue
Block a user