Examples with Update org.h2.command.dml.Update used on opensource projects

Example 1 with Update

use of org.h2.command.dml.Update in project ignite by apache.

the class DmlStatementsProcessor method getPlanForStatement.

/**
     * Generate SELECT statements to retrieve data for modifications from and find fast UPDATE or DELETE args,
     * if available.
     *
     * @param schema Schema.
     * @param prepStmt JDBC statement.
     * @return Update plan.
     */
@SuppressWarnings({ "unchecked", "ConstantConditions" })
private UpdatePlan getPlanForStatement(String schema, PreparedStatement prepStmt, @Nullable Integer errKeysPos) throws IgniteCheckedException {
    Prepared p = GridSqlQueryParser.prepared(prepStmt);
    H2DmlPlanKey planKey = new H2DmlPlanKey(schema, p.getSQL());
    UpdatePlan res = (errKeysPos == null ? planCache.get(planKey) : null);
    if (res != null)
        return res;
    res = UpdatePlanBuilder.planForStatement(p, errKeysPos);
    // Don't cache re-runs
    if (errKeysPos == null)
        return U.firstNotNull(planCache.putIfAbsent(planKey, res), res);
    else
        return res;
}

Example 2 with Update

use of org.h2.command.dml.Update in project ignite by apache.

the class DmlStatementsProcessor method streamUpdateQuery.

/**
     * Perform given statement against given data streamer. Only rows based INSERT and MERGE are supported
     * as well as key bound UPDATE and DELETE (ones with filter {@code WHERE _key = ?}).
     *
     * @param streamer Streamer to feed data to.
     * @param stmt Statement.
     * @param args Statement arguments.
     * @return Number of rows in given statement for INSERT and MERGE, {@code 1} otherwise.
     * @throws IgniteCheckedException if failed.
     */
@SuppressWarnings({ "unchecked", "ConstantConditions" })
long streamUpdateQuery(IgniteDataStreamer streamer, PreparedStatement stmt, Object[] args) throws IgniteCheckedException {
    args = U.firstNotNull(args, X.EMPTY_OBJECT_ARRAY);
    Prepared p = GridSqlQueryParser.prepared(stmt);
    assert p != null;
    UpdatePlan plan = UpdatePlanBuilder.planForStatement(p, null);
    if (!F.eq(streamer.cacheName(), plan.tbl.rowDescriptor().context().name()))
        throw new IgniteSQLException("Cross cache streaming is not supported, please specify cache explicitly" + " in connection options", IgniteQueryErrorCode.UNSUPPORTED_OPERATION);
    if (plan.mode == UpdateMode.INSERT && plan.rowsNum > 0) {
        assert plan.isLocSubqry;
        final GridCacheContext cctx = plan.tbl.rowDescriptor().context();
        QueryCursorImpl<List<?>> cur;
        final ArrayList<List<?>> data = new ArrayList<>(plan.rowsNum);
        final GridQueryFieldsResult res = idx.queryLocalSqlFields(idx.schema(cctx.name()), plan.selectQry, F.asList(args), null, false, 0, null);
        QueryCursorImpl<List<?>> stepCur = new QueryCursorImpl<>(new Iterable<List<?>>() {

            @Override
            public Iterator<List<?>> iterator() {
                try {
                    return new GridQueryCacheObjectsIterator(res.iterator(), idx.objectContext(), cctx.keepBinary());
                } catch (IgniteCheckedException e) {
                    throw new IgniteException(e);
                }
            }
        }, null);
        data.addAll(stepCur.getAll());
        cur = new QueryCursorImpl<>(new Iterable<List<?>>() {

            @Override
            public Iterator<List<?>> iterator() {
                return data.iterator();
            }
        }, null);
        if (plan.rowsNum == 1) {
            IgniteBiTuple t = rowToKeyValue(cctx, cur.iterator().next(), plan);
            streamer.addData(t.getKey(), t.getValue());
            return 1;
        }
        Map<Object, Object> rows = new LinkedHashMap<>(plan.rowsNum);
        for (List<?> row : cur) {
            final IgniteBiTuple t = rowToKeyValue(cctx, row, plan);
            rows.put(t.getKey(), t.getValue());
        }
        streamer.addData(rows);
        return rows.size();
    } else
        throw new IgniteSQLException("Only tuple based INSERT statements are supported in streaming mode", IgniteQueryErrorCode.UNSUPPORTED_OPERATION);
}

Example 3 with Update

use of org.h2.command.dml.Update in project ignite by apache.

the class GridSqlQuerySplitter method split.

/**
     * @param stmt Prepared statement.
     * @param params Parameters.
     * @param collocatedGrpBy Whether the query has collocated GROUP BY keys.
     * @param distributedJoins If distributed joins enabled.
     * @param enforceJoinOrder Enforce join order.
     * @param h2 Indexing.
     * @return Two step query.
     * @throws SQLException If failed.
     * @throws IgniteCheckedException If failed.
     */
public static GridCacheTwoStepQuery split(JdbcPreparedStatement stmt, Object[] params, boolean collocatedGrpBy, boolean distributedJoins, boolean enforceJoinOrder, IgniteH2Indexing h2) throws SQLException, IgniteCheckedException {
    if (params == null)
        params = GridCacheSqlQuery.EMPTY_PARAMS;
    // Here we will just do initial query parsing. Do not use optimized
    // subqueries because we do not have unique FROM aliases yet.
    GridSqlQuery qry = parse(prepared(stmt), false);
    String originalSql = qry.getSQL();
    final boolean explain = qry.explain();
    qry.explain(false);
    GridSqlQuerySplitter splitter = new GridSqlQuerySplitter(params, collocatedGrpBy, h2.kernalContext());
    // Normalization will generate unique aliases for all the table filters in FROM.
    // Also it will collect all tables and schemas from the query.
    splitter.normalizeQuery(qry);
    Connection conn = stmt.getConnection();
    // Here we will have correct normalized AST with optimized join order.
    // The distributedJoins parameter is ignored because it is not relevant for
    // the REDUCE query optimization.
    qry = parse(optimize(h2, conn, qry.getSQL(), params, false, enforceJoinOrder), true);
    // Do the actual query split. We will update the original query AST, need to be careful.
    splitter.splitQuery(qry);
    // We must have at least one map query.
    assert !F.isEmpty(splitter.mapSqlQrys) : "map";
    // We must have a reduce query.
    assert splitter.rdcSqlQry != null : "rdc";
    // distributed joins at all.
    if (distributedJoins) {
        boolean allCollocated = true;
        for (GridCacheSqlQuery mapSqlQry : splitter.mapSqlQrys) {
            Prepared prepared = optimize(h2, conn, mapSqlQry.query(), mapSqlQry.parameters(params), true, enforceJoinOrder);
            allCollocated &= isCollocated((Query) prepared);
            mapSqlQry.query(parse(prepared, true).getSQL());
        }
        // We do not need distributed joins if all MAP queries are collocated.
        if (allCollocated)
            distributedJoins = false;
    }
    // Setup resulting two step query and return it.
    GridCacheTwoStepQuery twoStepQry = new GridCacheTwoStepQuery(originalSql, splitter.tbls);
    twoStepQry.reduceQuery(splitter.rdcSqlQry);
    for (GridCacheSqlQuery mapSqlQry : splitter.mapSqlQrys) twoStepQry.addMapQuery(mapSqlQry);
    twoStepQry.skipMergeTable(splitter.rdcQrySimple);
    twoStepQry.explain(explain);
    twoStepQry.distributedJoins(distributedJoins);
    // all map queries must have non-empty derivedPartitions to use this feature.
    twoStepQry.derivedPartitions(mergePartitionsFromMultipleQueries(twoStepQry.mapQueries()));
    return twoStepQry;
}

Example 4 with Update

use of org.h2.command.dml.Update in project ignite by apache.

the class DmlAstUtils method getFastUpdateArgs.

/**
     * @param update UPDATE statement.
     * @return {@code null} if given statement directly updates {@code _val} column with a literal or param value
     * and filters by single non expression key (and, optionally,  by single non expression value).
     */
public static FastUpdateArguments getFastUpdateArgs(GridSqlUpdate update) {
    IgnitePair<GridSqlElement> filter = findKeyValueEqualityCondition(update.where());
    if (filter == null)
        return null;
    if (update.cols().size() != 1)
        return null;
    Table tbl = update.cols().get(0).column().getTable();
    if (!(tbl instanceof GridH2Table))
        return null;
    GridH2RowDescriptor desc = ((GridH2Table) tbl).rowDescriptor();
    if (!desc.isValueColumn(update.cols().get(0).column().getColumnId()))
        return null;
    GridSqlElement set = update.set().get(update.cols().get(0).columnName());
    if (!(set instanceof GridSqlConst || set instanceof GridSqlParameter))
        return null;
    return new FastUpdateArguments(operandForElement(filter.getKey()), operandForElement(filter.getValue()), operandForElement(set));
}

Example 5 with Update

use of org.h2.command.dml.Update in project ignite by apache.

the class DmlAstUtils method selectForUpdate.

/**
     * Generate SQL SELECT based on UPDATE's WHERE, LIMIT, etc.
     *
     * @param update Update statement.
     * @param keysParamIdx Index of new param for the array of keys.
     * @return SELECT statement.
     */
public static GridSqlSelect selectForUpdate(GridSqlUpdate update, @Nullable Integer keysParamIdx) {
    GridSqlSelect mapQry = new GridSqlSelect();
    mapQry.from(update.target());
    Set<GridSqlTable> tbls = new HashSet<>();
    collectAllGridTablesInTarget(update.target(), tbls);
    assert tbls.size() == 1 : "Failed to determine target table for UPDATE";
    GridSqlTable tbl = tbls.iterator().next();
    GridH2Table gridTbl = tbl.dataTable();
    assert gridTbl != null : "Failed to determine target grid table for UPDATE";
    Column h2KeyCol = gridTbl.getColumn(GridH2AbstractKeyValueRow.KEY_COL);
    Column h2ValCol = gridTbl.getColumn(GridH2AbstractKeyValueRow.VAL_COL);
    GridSqlColumn keyCol = new GridSqlColumn(h2KeyCol, tbl, h2KeyCol.getName());
    keyCol.resultType(GridSqlType.fromColumn(h2KeyCol));
    GridSqlColumn valCol = new GridSqlColumn(h2ValCol, tbl, h2ValCol.getName());
    valCol.resultType(GridSqlType.fromColumn(h2ValCol));
    mapQry.addColumn(keyCol, true);
    mapQry.addColumn(valCol, true);
    for (GridSqlColumn c : update.cols()) {
        String newColName = Parser.quoteIdentifier("_upd_" + c.columnName());
        // We have to use aliases to cover cases when the user
        // wants to update _val field directly (if it's a literal)
        GridSqlAlias alias = new GridSqlAlias(newColName, elementOrDefault(update.set().get(c.columnName()), c), true);
        alias.resultType(c.resultType());
        mapQry.addColumn(alias, true);
    }
    GridSqlElement where = update.where();
    if (keysParamIdx != null)
        where = injectKeysFilterParam(where, keyCol, keysParamIdx);
    mapQry.where(where);
    mapQry.limit(update.limit());
    return mapQry;
}