Examples of org.h2.util.StatementBuilder

org.h2.util.StatementBuilder

A utility class to build a statement. In addition to the methods supported by StringBuilder, it allows to add a text only in the second iteration. This simplified constructs such as:

 StringBuilder buff = new StringBuilder(); for (int i = 0; i < args.length; i++) { if (i > 0) { buff.append(", "); } buff.append(args[i]); }

 StatementBuilder buff = new StatementBuilder(); for (String s : args) { buff.appendExceptFirst(", "); buff.append(a); }

                        + ", " + quoteArray(types) + ");");
            }
            checkClosed();
            String tableType;
            if (types != null && types.length > 0) {
                StatementBuilder buff = new StatementBuilder("TABLE_TYPE IN(");
                for (int i = 0; i < types.length; i++) {
                    buff.appendExceptFirst(", ");
                    buff.append('?');
                }
                tableType = buff.append(')').toString();
            } else {
                tableType = "TRUE";
            }
            PreparedStatement prep = conn.prepareAutoCloseStatement("SELECT "
                    + "TABLE_CATALOG TABLE_CAT, "

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            checkClosed();
            PreparedStatement prep = conn.prepareAutoCloseStatement("SELECT TOPIC "
                    + "FROM INFORMATION_SCHEMA.HELP WHERE SECTION = ?");
            prep.setString(1, section);
            ResultSet rs = prep.executeQuery();
            StatementBuilder buff = new StatementBuilder();
            while (rs.next()) {
                String s = rs.getString(1).trim();
                String[] array = StringUtils.arraySplit(s, ',', true);
                for (String a : array) {
                    buff.appendExceptFirst(",");
                    String f = a.trim();
                    if (f.indexOf(' ') >= 0) {
                        // remove 'Function' from 'INSERT Function'
                        f = f.substring(0, f.indexOf(' ')).trim();
                    }
                    buff.append(f);
                }
            }
            rs.close();
            prep.close();
            return buff.toString();
        } catch (Exception e) {
            throw logAndConvert(e);
        }
    }

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    private DbException getSyntaxError() {
        if (expectedList == null || expectedList.size() == 0) {
            return DbException.getSyntaxError(sqlCommand, parseIndex);
        }
        StatementBuilder buff = new StatementBuilder();
        for (String e : expectedList) {
            buff.appendExceptFirst(", ");
            buff.append(e);
        }
        return DbException.getSyntaxError(sqlCommand, parseIndex, buff.toString());
    }

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     * @param quotedName the name of this object (quoted if necessary)
     * @param internalIndex add the index name to the statement
     * @return the SQL statement
     */
    public String getCreateSQLForCopy(Table forTable, Table forRefTable, String quotedName, boolean internalIndex) {
        StatementBuilder buff = new StatementBuilder("ALTER TABLE ");
        String mainTable = forTable.getSQL();
        buff.append(mainTable).append(" ADD CONSTRAINT ");
        if (forTable.isHidden()) {
            buff.append("IF NOT EXISTS ");
        }
        buff.append(quotedName);
        if (comment != null) {
            buff.append(" COMMENT ").append(StringUtils.quoteStringSQL(comment));
        }
        IndexColumn[] cols = columns;
        IndexColumn[] refCols = refColumns;
        buff.append(" FOREIGN KEY(");
        for (IndexColumn c : cols) {
            buff.appendExceptFirst(", ");
            buff.append(c.getSQL());
        }
        buff.append(')');
        if (internalIndex && indexOwner && forTable == this.table) {
            buff.append(" INDEX ").append(index.getSQL());
        }
        buff.append(" REFERENCES ");
        String quotedRefTable;
        if (this.table == this.refTable) {
            // self-referencing constraints: need to use new table
            quotedRefTable = forTable.getSQL();
        } else {
            quotedRefTable = forRefTable.getSQL();
        }
        buff.append(quotedRefTable).append('(');
        buff.resetCount();
        for (IndexColumn r : refCols) {
            buff.appendExceptFirst(", ");
            buff.append(r.getSQL());
        }
        buff.append(')');
        if (internalIndex && refIndexOwner && forTable == this.table) {
            buff.append(" INDEX ").append(refIndex.getSQL());
        }
        if (deleteAction != RESTRICT) {
            buff.append(" ON DELETE ");
            appendAction(buff, deleteAction);
        }
        if (updateAction != RESTRICT) {
            buff.append(" ON UPDATE ");
            appendAction(buff, updateAction);
        }
        return buff.append(" NOCHECK").toString();
    }

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     * name (if set), and the constraint expression.
     *
     * @return the description
     */
    private String getShortDescription() {
        StatementBuilder buff = new StatementBuilder(getName());
        buff.append(": ").append(table.getSQL()).append(" FOREIGN KEY(");
        for (IndexColumn c : columns) {
            buff.appendExceptFirst(", ");
            buff.append(c.getSQL());
        }
        buff.append(") REFERENCES ").append(refTable.getSQL()).append('(');
        buff.resetCount();
        for (IndexColumn r : refColumns) {
            buff.appendExceptFirst(", ");
            buff.append(r.getSQL());
        }
        return buff.append(')').toString();
    }

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    private void buildDeleteSQL() {
        if (deleteAction == RESTRICT) {
            return;
        }
        StatementBuilder buff = new StatementBuilder();
        if (deleteAction == CASCADE) {
            buff.append("DELETE FROM ").append(table.getSQL());
        } else {
            appendUpdate(buff);
        }
        appendWhere(buff);
        deleteSQL = buff.toString();
    }

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    private void buildUpdateSQL() {
        if (updateAction == RESTRICT) {
            return;
        }
        StatementBuilder buff = new StatementBuilder();
        appendUpdate(buff);
        appendWhere(buff);
        updateSQL = buff.toString();
    }

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    public void checkExistingData(Session session) {
        if (session.getDatabase().isStarting()) {
            // don't check at startup
            return;
        }
        StatementBuilder buff = new StatementBuilder("SELECT 1 FROM (SELECT ");
        for (IndexColumn c : columns) {
            buff.appendExceptFirst(", ");
            buff.append(c.getSQL());
        }
        buff.append(" FROM ").append(table.getSQL()).append(" WHERE ");
        buff.resetCount();
        for (IndexColumn c : columns) {
            buff.appendExceptFirst(" AND ");
            buff.append(c.getSQL()).append(" IS NOT NULL ");
        }
        buff.append(" ORDER BY ");
        buff.resetCount();
        for (IndexColumn c : columns) {
            buff.appendExceptFirst(", ");
            buff.append(c.getSQL());
        }
        buff.append(") C WHERE NOT EXISTS(SELECT 1 FROM ").
            append(refTable.getSQL()).append(" P WHERE ");
        buff.resetCount();
        int i = 0;
        for (IndexColumn c : columns) {
            buff.appendExceptFirst(" AND ");
            buff.append("C.").append(c.getSQL()).append('=').
                append("P.").append(refColumns[i++].getSQL());
        }
        buff.append(')');
        String sql = buff.toString();
        ResultInterface r = session.prepare(sql).query(1);
        if (r.next()) {
            throw DbException.get(ErrorCode.REFERENTIAL_INTEGRITY_VIOLATED_PARENT_MISSING_1,
                    getShortDescription());
        }

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    public String getCreateSQLForCopy(Table forTable, String quotedName) {
        return getCreateSQLForCopy(forTable, quotedName, true);
    }


    private String getCreateSQLForCopy(Table forTable, String quotedName, boolean internalIndex) {
        StatementBuilder buff = new StatementBuilder("ALTER TABLE ");
        buff.append(forTable.getSQL()).append(" ADD CONSTRAINT ");
        if (forTable.isHidden()) {
            buff.append("IF NOT EXISTS ");
        }
        buff.append(quotedName);
        if (comment != null) {
            buff.append(" COMMENT ").append(StringUtils.quoteStringSQL(comment));
        }
        buff.append(' ').append(getTypeName()).append('(');
        for (IndexColumn c : columns) {
            buff.appendExceptFirst(", ");
            buff.append(Parser.quoteIdentifier(c.column.getName()));
        }
        buff.append(')');
        if (internalIndex && indexOwner && forTable == this.table) {
            buff.append(" INDEX ").append(index.getSQL());
        }
        return buff.toString();
    }

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            Arrays.sort(wordIds);
            return wordIds;
        }


        private String getKey(Object[] row) throws SQLException {
            StatementBuilder buff = new StatementBuilder();
            for (int columnIndex : index.keys) {
                buff.appendExceptFirst(" AND ");
                buff.append(StringUtils.quoteIdentifier(index.columns[columnIndex]));
                Object o = row[columnIndex];
                if (o == null) {
                    buff.append(" IS NULL");
                } else {
                    buff.append('=').append(quoteSQL(o, columnTypes[columnIndex]));
                }
            }
            return buff.toString();
        }

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