Examples with UpdateOp herddb.model.planner.UpdateOp used on opensource projects

Example 1 with UpdateOp

use of herddb.model.planner.UpdateOp in project herddb by diennea.

the class CalcitePlanner method planUpdate.

private PlannerOp planUpdate(EnumerableTableModify dml, boolean returnValues) {
    PlannerOp input = convertRelNode(dml.getInput(), null, false, false);
    List<String> updateColumnList = dml.getUpdateColumnList();
    List<RexNode> sourceExpressionList = dml.getSourceExpressionList();
    final String tableSpace = dml.getTable().getQualifiedName().get(0);
    final String tableName = dml.getTable().getQualifiedName().get(1);
    final TableImpl tableImpl = (TableImpl) dml.getTable().unwrap(org.apache.calcite.schema.Table.class);
    Table table = tableImpl.tableManager.getTable();
    List<CompiledSQLExpression> expressionsForValue = new ArrayList<>(sourceExpressionList.size());
    List<CompiledSQLExpression> expressionsForKey = new ArrayList<>(sourceExpressionList.size());
    List<String> updateColumnListInValue = new ArrayList<>(updateColumnList.size());
    List<String> updateColumnListInPk = new ArrayList<>();
    for (int i = 0; i < updateColumnList.size(); i++) {
        String columnName = updateColumnList.get(i);
        boolean isPk = table.isPrimaryKeyColumn(columnName);
        RexNode node = sourceExpressionList.get(i);
        CompiledSQLExpression exp = SQLExpressionCompiler.compileExpression(node);
        if (isPk) {
            updateColumnListInPk.add(columnName);
            expressionsForKey.add(exp);
        } else {
            updateColumnListInValue.add(columnName);
            expressionsForValue.add(exp);
        }
    }
    if (expressionsForKey.isEmpty()) {
        // standard UPDATE, we are not updating any column in the PK
        RecordFunction function = new SQLRecordFunction(updateColumnListInValue, table, expressionsForValue);
        UpdateStatement update = null;
        if (input instanceof TableScanOp) {
            update = new UpdateStatement(tableSpace, tableName, null, function, null);
        } else if (input instanceof FilterOp) {
            FilterOp filter = (FilterOp) input;
            if (filter.getInput() instanceof TableScanOp) {
                SQLRecordPredicate pred = new SQLRecordPredicate(table, null, filter.getCondition());
                update = new UpdateStatement(tableSpace, tableName, null, function, pred);
            }
        } else if (input instanceof ProjectOp) {
            ProjectOp proj = (ProjectOp) input;
            if (proj.getInput() instanceof TableScanOp) {
                update = new UpdateStatement(tableSpace, tableName, null, function, null);
            } else if (proj.getInput() instanceof FilterOp) {
                FilterOp filter = (FilterOp) proj.getInput();
                if (filter.getInput() instanceof TableScanOp) {
                    SQLRecordPredicate pred = new SQLRecordPredicate(table, null, filter.getCondition());
                    update = new UpdateStatement(tableSpace, tableName, null, function, pred);
                }
            } else if (proj.getInput() instanceof FilteredTableScanOp) {
                FilteredTableScanOp filter = (FilteredTableScanOp) proj.getInput();
                Predicate pred = filter.getPredicate();
                update = new UpdateStatement(tableSpace, tableName, null, function, pred);
            } else if (proj.getInput() instanceof BindableTableScanOp) {
                BindableTableScanOp filter = (BindableTableScanOp) proj.getInput();
                ScanStatement scan = filter.getStatement();
                if (scan.getComparator() == null && scan.getLimits() == null && scan.getTableDef() != null) {
                    Predicate pred = scan.getPredicate();
                    update = new UpdateStatement(tableSpace, tableName, null, function, pred);
                }
            }
        }
        if (update != null) {
            return new SimpleUpdateOp(update.setReturnValues(returnValues));
        } else {
            return new UpdateOp(tableSpace, tableName, input, returnValues, function);
        }
    } else {
        // bad stuff ! we are updating the PK, we need to transform this to a sequence of delete and inserts
        // ReplaceOp won't execute the two statements atomically
        RecordFunction functionForValue = new SQLRecordFunction(updateColumnListInValue, table, expressionsForValue);
        SQLRecordKeyFunction functionForKey = new SQLRecordKeyFunction(updateColumnListInPk, expressionsForKey, table);
        return new ReplaceOp(tableSpace, tableName, input, returnValues, functionForKey, functionForValue);
    }
}