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Overview
Comment:Fix a bug in the debugging printf logic. (CVS 4600)
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SHA1: 1d6a9f5fafb862fb31c8589fa118a5672bad6abd
User & Date: drh 2007-12-08 17:55:36
Context
2007-12-08
18:01
Strengthen the tests for aggregate functions in GROUP BY clauses. Changes to test cases only. No changes to code. (CVS 4601) check-in: 4be8e676 user: drh tags: trunk
17:55
Fix a bug in the debugging printf logic. (CVS 4600) check-in: 1d6a9f5f user: drh tags: trunk
2007-12-07
23:47
Change prefix search from O(N*M) to O(NlogM). The previous code linearly merged the doclists, so as the accumulated list got large, things got slow (the M term, a fucntion of the number of documents in the index). This change does pairwise merges until a single doclist remains. A test search of 't*' against a database of RFC text improves from 1m16s to 4.75s. (CVS 4599) check-in: feef1b15 user: shess tags: trunk
Changes
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Changes to src/printf.c.

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  StrAccum acc;
  char zBuf[500];
  sqlite3StrAccumInit(&acc, zBuf, sizeof(zBuf));
  acc.useMalloc = 0;
  va_start(ap,zFormat);
  vxprintf(&acc, 0, zFormat, ap);
  va_end(ap);

  fprintf(stdout,"%s", zBuf);
  fflush(stdout);
}
#endif







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  StrAccum acc;
  char zBuf[500];
  sqlite3StrAccumInit(&acc, zBuf, sizeof(zBuf));
  acc.useMalloc = 0;
  va_start(ap,zFormat);
  vxprintf(&acc, 0, zFormat, ap);
  va_end(ap);
  sqlite3StrAccumFinish(&acc);
  fprintf(stdout,"%s", zBuf);
  fflush(stdout);
}
#endif