for(i=0; az[i]; i++) sqlite3_free(az[i]);
    sqlite3_free(az);
  }
}

/*
** Return a list of column names for the table zDb.zTab.  Space to
** old the list is obtained from malloc() and should released by calling
** namelistFree() when no longer needed.
**
** Primary key columns are listed first, followed by data columns.  The
** "primary key" in the previous sentence is the true primary key - the
** rowid or INTEGER PRIMARY KEY for ordinary tables or the declared
** PRIMARY KEY for WITHOUT ROWID tables.  The number of columns in the
** primary key is returned in *pNPkey.
**
** If the table is a rowid table for which the rowid is inaccessible,
** then this routine returns a NULL pointer.
**
** Examples:
**    CREATE TABLE t1(a INT UNIQUE, b INTEGER, c TEXT, PRIMARY KEY(c));
**    *pnPKey = 1;

    for(i=0; az[i]; i++) sqlite3_free(az[i]);
    sqlite3_free(az);
  }
}

/*
** Return a list of column names for the table zDb.zTab.  Space to
** hold the list is obtained from sqlite3_malloc() and should released
** using namelistFree() when no longer needed.
**
** Primary key columns are listed first, followed by data columns.  The
** "primary key" in the previous sentence is the true primary key - the
** rowid or INTEGER PRIMARY KEY for ordinary tables or the declared
** PRIMARY KEY for WITHOUT ROWID tables.  The number of columns in the
** primary key is returned in *pnPkey.
**
** If the table is a rowid table for which the rowid is inaccessible,
** then this routine returns a NULL pointer.
**
** Examples:
**    CREATE TABLE t1(a INT UNIQUE, b INTEGER, c TEXT, PRIMARY KEY(c));
**    *pnPKey = 1;