Examples with Plan org.h2.table.Plan used on opensource projects

Example 11 with Plan

use of org.h2.table.Plan in project h2database by h2database.

the class TestOptimizations method testOptimizeInJoin.

private void testOptimizeInJoin() throws SQLException {
    deleteDb("optimizations");
    Connection conn = getConnection("optimizations");
    Statement stat = conn.createStatement();
    stat.execute("create table test(id int primary key)");
    stat.execute("insert into test select x from system_range(1, 1000)");
    ResultSet rs = stat.executeQuery("explain select * " + "from test where id in (400, 300)");
    rs.next();
    String plan = rs.getString(1);
    if (plan.indexOf("/* PUBLIC.PRIMARY_KEY_") < 0) {
        fail("Expected using the primary key, got: " + plan);
    }
    conn.close();
}

Example 12 with Plan

use of org.h2.table.Plan in project h2database by h2database.

the class TestOptimizations method testOrderByExpression.

private void testOrderByExpression() throws Exception {
    Connection conn = getConnection("optimizations");
    Statement stat = conn.createStatement();
    stat.execute("create table test(id int primary key, name varchar)");
    stat.execute("insert into test values(1, 'Hello'), (2, 'Hello'), (3, 'Hello')");
    ResultSet rs;
    rs = stat.executeQuery("explain select name from test where name='Hello' order by name");
    rs.next();
    String plan = rs.getString(1);
    assertContains(plan, "tableScan");
    stat.execute("drop table test");
    conn.close();
}

Example 13 with Plan

use of org.h2.table.Plan in project ignite by apache.

the class DmlStatementsProcessor method rowToKeyValue.

/**
     * Convert row presented as an array of Objects into key-value pair to be inserted to cache.
     * @param cctx Cache context.
     * @param row Row to process.
     * @param plan Update plan.
     * @throws IgniteCheckedException if failed.
     */
@SuppressWarnings({ "unchecked", "ConstantConditions", "ResultOfMethodCallIgnored" })
private IgniteBiTuple<?, ?> rowToKeyValue(GridCacheContext cctx, List<?> row, UpdatePlan plan) throws IgniteCheckedException {
    GridH2RowDescriptor rowDesc = plan.tbl.rowDescriptor();
    GridQueryTypeDescriptor desc = rowDesc.type();
    Object key = plan.keySupplier.apply(row);
    if (QueryUtils.isSqlType(desc.keyClass())) {
        assert plan.keyColIdx != -1;
        key = convert(key, rowDesc, desc.keyClass(), plan.colTypes[plan.keyColIdx]);
    }
    Object val = plan.valSupplier.apply(row);
    if (QueryUtils.isSqlType(desc.valueClass())) {
        assert plan.valColIdx != -1;
        val = convert(val, rowDesc, desc.valueClass(), plan.colTypes[plan.valColIdx]);
    }
    if (key == null)
        throw new IgniteSQLException("Key for INSERT or MERGE must not be null", IgniteQueryErrorCode.NULL_KEY);
    if (val == null)
        throw new IgniteSQLException("Value for INSERT or MERGE must not be null", IgniteQueryErrorCode.NULL_VALUE);
    Map<String, Object> newColVals = new HashMap<>();
    for (int i = 0; i < plan.colNames.length; i++) {
        if (i == plan.keyColIdx || i == plan.valColIdx)
            continue;
        String colName = plan.colNames[i];
        GridQueryProperty prop = desc.property(colName);
        assert prop != null;
        Class<?> expCls = prop.type();
        newColVals.put(colName, convert(row.get(i), rowDesc, expCls, plan.colTypes[i]));
    }
    // We update columns in the order specified by the table for a reason - table's
    // column order preserves their precedence for correct update of nested properties.
    Column[] cols = plan.tbl.getColumns();
    // First 3 columns are _key, _val and _ver. Skip 'em.
    for (int i = DEFAULT_COLUMNS_COUNT; i < cols.length; i++) {
        if (plan.tbl.rowDescriptor().isKeyValueOrVersionColumn(i))
            continue;
        String colName = cols[i].getName();
        if (!newColVals.containsKey(colName))
            continue;
        Object colVal = newColVals.get(colName);
        desc.setValue(colName, key, val, colVal);
    }
    if (cctx.binaryMarshaller()) {
        if (key instanceof BinaryObjectBuilder)
            key = ((BinaryObjectBuilder) key).build();
        if (val instanceof BinaryObjectBuilder)
            val = ((BinaryObjectBuilder) val).build();
    }
    return new IgniteBiTuple<>(key, val);
}

Example 14 with Plan

use of org.h2.table.Plan in project ignite by apache.

the class GridH2TableSelfTest method checkQueryPlan.

/**
     * Check query plan to correctly select index.
     *
     * @param conn Connection.
     * @param sql Select.
     * @param search Search token in result.
     * @throws SQLException If failed.
     */
private void checkQueryPlan(Connection conn, String sql, String search) throws SQLException {
    try (Statement s = conn.createStatement()) {
        try (ResultSet r = s.executeQuery("EXPLAIN ANALYZE " + sql)) {
            assertTrue(r.next());
            String plan = r.getString(1);
            assertTrue("Execution plan for '" + sql + "' query should contain '" + search + "'", plan.contains(search));
        }
    }
}

Example 15 with Plan

use of org.h2.table.Plan in project ignite by apache.

the class UpdatePlanBuilder method planForUpdate.

/**
     * Prepare update plan for UPDATE or DELETE.
     *
     * @param stmt UPDATE or DELETE statement.
     * @param errKeysPos index to inject param for re-run keys at. Null if it's not a re-run plan.
     * @return Update plan.
     * @throws IgniteCheckedException if failed.
     */
private static UpdatePlan planForUpdate(GridSqlStatement stmt, @Nullable Integer errKeysPos) throws IgniteCheckedException {
    GridSqlElement target;
    FastUpdateArguments fastUpdate;
    UpdateMode mode;
    if (stmt instanceof GridSqlUpdate) {
        // Let's verify that user is not trying to mess with key's columns directly
        verifyUpdateColumns(stmt);
        GridSqlUpdate update = (GridSqlUpdate) stmt;
        target = update.target();
        fastUpdate = DmlAstUtils.getFastUpdateArgs(update);
        mode = UpdateMode.UPDATE;
    } else if (stmt instanceof GridSqlDelete) {
        GridSqlDelete del = (GridSqlDelete) stmt;
        target = del.from();
        fastUpdate = DmlAstUtils.getFastDeleteArgs(del);
        mode = UpdateMode.DELETE;
    } else
        throw new IgniteSQLException("Unexpected DML operation [cls=" + stmt.getClass().getName() + ']', IgniteQueryErrorCode.UNEXPECTED_OPERATION);
    GridSqlTable tbl = gridTableForElement(target);
    GridH2Table gridTbl = tbl.dataTable();
    GridH2RowDescriptor desc = gridTbl.rowDescriptor();
    if (desc == null)
        throw new IgniteSQLException("Row descriptor undefined for table '" + gridTbl.getName() + "'", IgniteQueryErrorCode.NULL_TABLE_DESCRIPTOR);
    if (fastUpdate != null)
        return UpdatePlan.forFastUpdate(mode, gridTbl, fastUpdate);
    else {
        GridSqlSelect sel;
        if (stmt instanceof GridSqlUpdate) {
            List<GridSqlColumn> updatedCols = ((GridSqlUpdate) stmt).cols();
            int valColIdx = -1;
            String[] colNames = new String[updatedCols.size()];
            int[] colTypes = new int[updatedCols.size()];
            for (int i = 0; i < updatedCols.size(); i++) {
                colNames[i] = updatedCols.get(i).columnName();
                colTypes[i] = updatedCols.get(i).resultType().type();
                Column column = updatedCols.get(i).column();
                if (desc.isValueColumn(column.getColumnId()))
                    valColIdx = i;
            }
            boolean hasNewVal = (valColIdx != -1);
            // Statement updates distinct properties if it does not have _val in updated columns list
            // or if its list of updated columns includes only _val, i.e. is single element.
            boolean hasProps = !hasNewVal || updatedCols.size() > 1;
            // Index of new _val in results of SELECT
            if (hasNewVal)
                valColIdx += 2;
            int newValColIdx = (hasNewVal ? valColIdx : 1);
            KeyValueSupplier newValSupplier = createSupplier(desc.context(), desc.type(), newValColIdx, hasProps, false, true);
            sel = DmlAstUtils.selectForUpdate((GridSqlUpdate) stmt, errKeysPos);
            return UpdatePlan.forUpdate(gridTbl, colNames, colTypes, newValSupplier, valColIdx, sel.getSQL());
        } else {
            sel = DmlAstUtils.selectForDelete((GridSqlDelete) stmt, errKeysPos);
            return UpdatePlan.forDelete(gridTbl, sel.getSQL());
        }
    }
}