Exemplo n.º 1
0
 private int generateInsertValues(int count, Table table) throws IOException {
   PlanItem plan = table.getBestPlanItem(session, null, null);
   Index index = plan.getIndex();
   Cursor cursor = index.find(session, null, null);
   Column[] columns = table.getColumns();
   StatementBuilder buff = new StatementBuilder("INSERT INTO ");
   buff.append(table.getSQL()).append('(');
   for (Column col : columns) {
     buff.appendExceptFirst(", ");
     buff.append(Parser.quoteIdentifier(col.getName()));
   }
   buff.append(") VALUES");
   if (!simple) {
     buff.append('\n');
   }
   buff.append('(');
   String ins = buff.toString();
   buff = null;
   while (cursor.next()) {
     Row row = cursor.get();
     if (buff == null) {
       buff = new StatementBuilder(ins);
     } else {
       buff.append(",\n(");
     }
     for (int j = 0; j < row.getColumnCount(); j++) {
       if (j > 0) {
         buff.append(", ");
       }
       Value v = row.getValue(j);
       if (v.getPrecision() > lobBlockSize) {
         int id;
         if (v.getType() == Value.CLOB) {
           id = writeLobStream(v);
           buff.append("SYSTEM_COMBINE_CLOB(" + id + ")");
         } else if (v.getType() == Value.BLOB) {
           id = writeLobStream(v);
           buff.append("SYSTEM_COMBINE_BLOB(" + id + ")");
         } else {
           buff.append(v.getSQL());
         }
       } else {
         buff.append(v.getSQL());
       }
     }
     buff.append(')');
     count++;
     if ((count & 127) == 0) {
       checkCanceled();
     }
     if (simple || buff.length() > Constants.IO_BUFFER_SIZE) {
       add(buff.toString(), true);
       buff = null;
     }
   }
   if (buff != null) {
     add(buff.toString(), true);
   }
   return count;
 }
Exemplo n.º 2
0
 /**
  * Compare two values with the current comparison mode. The values may be of different type.
  *
  * @param a the first value
  * @param b the second value
  * @return 0 if both values are equal, -1 if the first value is smaller, and 1 otherwise
  */
 public int compareTypeSave(Value a, Value b) {
   if (a == b) {
     return 0;
   }
   int dataType = Value.getHigherOrder(a.getType(), b.getType());
   a = a.convertTo(dataType);
   b = b.convertTo(dataType);
   return a.compareTypeSave(b, compareMode);
 }
Exemplo n.º 3
0
 private int writeLobStream(Value v) throws IOException {
   if (!tempLobTableCreated) {
     add(
         "CREATE TABLE IF NOT EXISTS SYSTEM_LOB_STREAM"
             + "(ID INT NOT NULL, PART INT NOT NULL, CDATA VARCHAR, BDATA BINARY)",
         true);
     add(
         "CREATE PRIMARY KEY SYSTEM_LOB_STREAM_PRIMARY_KEY " + "ON SYSTEM_LOB_STREAM(ID, PART)",
         true);
     add(
         "CREATE ALIAS IF NOT EXISTS "
             + "SYSTEM_COMBINE_CLOB FOR \""
             + this.getClass().getName()
             + ".combineClob\"",
         true);
     add(
         "CREATE ALIAS IF NOT EXISTS "
             + "SYSTEM_COMBINE_BLOB FOR \""
             + this.getClass().getName()
             + ".combineBlob\"",
         true);
     tempLobTableCreated = true;
   }
   int id = nextLobId++;
   switch (v.getType()) {
     case Value.BLOB:
       {
         byte[] bytes = new byte[lobBlockSize];
         InputStream input = v.getInputStream();
         try {
           for (int i = 0; ; i++) {
             StringBuilder buff = new StringBuilder(lobBlockSize * 2);
             buff.append("INSERT INTO SYSTEM_LOB_STREAM VALUES(" + id + ", " + i + ", NULL, '");
             int len = IOUtils.readFully(input, bytes, lobBlockSize);
             if (len <= 0) {
               break;
             }
             buff.append(StringUtils.convertBytesToHex(bytes, len)).append("')");
             String sql = buff.toString();
             add(sql, true);
           }
         } finally {
           IOUtils.closeSilently(input);
         }
         break;
       }
     case Value.CLOB:
       {
         char[] chars = new char[lobBlockSize];
         Reader reader = v.getReader();
         try {
           for (int i = 0; ; i++) {
             StringBuilder buff = new StringBuilder(lobBlockSize * 2);
             buff.append("INSERT INTO SYSTEM_LOB_STREAM VALUES(" + id + ", " + i + ", ");
             int len = IOUtils.readFully(reader, chars, lobBlockSize);
             if (len < 0) {
               break;
             }
             buff.append(StringUtils.quoteStringSQL(new String(chars, 0, len))).append(", NULL)");
             String sql = buff.toString();
             add(sql, true);
           }
         } finally {
           IOUtils.closeSilently(reader);
         }
         break;
       }
     default:
       DbException.throwInternalError("type:" + v.getType());
   }
   return id;
 }