Examples with SqlUpdate org.apache.calcite.sql.SqlUpdate used on opensource projects

Example 1 with SqlUpdate

use of org.apache.calcite.sql.SqlUpdate in project calcite by apache.

the class RelToSqlConverter method visit.

/**
 * @see #dispatch
 */
public Result visit(TableModify modify) {
    final Map<String, RelDataType> pairs = ImmutableMap.of();
    final Context context = aliasContext(pairs, false);
    // Target Table Name
    final SqlIdentifier sqlTargetTable = new SqlIdentifier(modify.getTable().getQualifiedName(), POS);
    switch(modify.getOperation()) {
        case INSERT:
            {
                // Convert the input to a SELECT query or keep as VALUES. Not all
                // dialects support naked VALUES, but all support VALUES inside INSERT.
                final SqlNode sqlSource = visitChild(0, modify.getInput()).asQueryOrValues();
                final SqlInsert sqlInsert = new SqlInsert(POS, SqlNodeList.EMPTY, sqlTargetTable, sqlSource, identifierList(modify.getInput().getRowType().getFieldNames()));
                return result(sqlInsert, ImmutableList.<Clause>of(), modify, null);
            }
        case UPDATE:
            {
                final Result input = visitChild(0, modify.getInput());
                final SqlUpdate sqlUpdate = new SqlUpdate(POS, sqlTargetTable, identifierList(modify.getUpdateColumnList()), exprList(context, modify.getSourceExpressionList()), ((SqlSelect) input.node).getWhere(), input.asSelect(), null);
                return result(sqlUpdate, input.clauses, modify, null);
            }
        case DELETE:
            {
                final Result input = visitChild(0, modify.getInput());
                final SqlDelete sqlDelete = new SqlDelete(POS, sqlTargetTable, input.asSelect().getWhere(), input.asSelect(), null);
                return result(sqlDelete, input.clauses, modify, null);
            }
        case MERGE:
        default:
            throw new AssertionError("not implemented: " + modify);
    }
}

Example 2 with SqlUpdate

use of org.apache.calcite.sql.SqlUpdate in project calcite by apache.

the class SqlValidatorImpl method performUnconditionalRewrites.

/**
 * Performs expression rewrites which are always used unconditionally. These
 * rewrites massage the expression tree into a standard form so that the
 * rest of the validation logic can be simpler.
 *
 * @param node      expression to be rewritten
 * @param underFrom whether node appears directly under a FROM clause
 * @return rewritten expression
 */
protected SqlNode performUnconditionalRewrites(SqlNode node, boolean underFrom) {
    if (node == null) {
        return node;
    }
    SqlNode newOperand;
    // first transform operands and invoke generic call rewrite
    if (node instanceof SqlCall) {
        if (node instanceof SqlMerge) {
            validatingSqlMerge = true;
        }
        SqlCall call = (SqlCall) node;
        final SqlKind kind = call.getKind();
        final List<SqlNode> operands = call.getOperandList();
        for (int i = 0; i < operands.size(); i++) {
            SqlNode operand = operands.get(i);
            boolean childUnderFrom;
            if (kind == SqlKind.SELECT) {
                childUnderFrom = i == SqlSelect.FROM_OPERAND;
            } else if (kind == SqlKind.AS && (i == 0)) {
                // for an aliased expression, it is under FROM if
                // the AS expression is under FROM
                childUnderFrom = underFrom;
            } else {
                childUnderFrom = false;
            }
            newOperand = performUnconditionalRewrites(operand, childUnderFrom);
            if (newOperand != null && newOperand != operand) {
                call.setOperand(i, newOperand);
            }
        }
        if (call.getOperator() instanceof SqlUnresolvedFunction) {
            assert call instanceof SqlBasicCall;
            final SqlUnresolvedFunction function = (SqlUnresolvedFunction) call.getOperator();
            // This function hasn't been resolved yet.  Perform
            // a half-hearted resolution now in case it's a
            // builtin function requiring special casing.  If it's
            // not, we'll handle it later during overload resolution.
            final List<SqlOperator> overloads = new ArrayList<>();
            opTab.lookupOperatorOverloads(function.getNameAsId(), function.getFunctionType(), SqlSyntax.FUNCTION, overloads);
            if (overloads.size() == 1) {
                ((SqlBasicCall) call).setOperator(overloads.get(0));
            }
        }
        if (rewriteCalls) {
            node = call.getOperator().rewriteCall(this, call);
        }
    } else if (node instanceof SqlNodeList) {
        SqlNodeList list = (SqlNodeList) node;
        for (int i = 0, count = list.size(); i < count; i++) {
            SqlNode operand = list.get(i);
            newOperand = performUnconditionalRewrites(operand, false);
            if (newOperand != null) {
                list.getList().set(i, newOperand);
            }
        }
    }
    // now transform node itself
    final SqlKind kind = node.getKind();
    switch(kind) {
        case VALUES:
            // CHECKSTYLE: IGNORE 1
            if (underFrom || true) {
                // over and over
                return node;
            } else {
                final SqlNodeList selectList = new SqlNodeList(SqlParserPos.ZERO);
                selectList.add(SqlIdentifier.star(SqlParserPos.ZERO));
                return new SqlSelect(node.getParserPosition(), null, selectList, node, null, null, null, null, null, null, null);
            }
        case ORDER_BY:
            {
                SqlOrderBy orderBy = (SqlOrderBy) node;
                handleOffsetFetch(orderBy.offset, orderBy.fetch);
                if (orderBy.query instanceof SqlSelect) {
                    SqlSelect select = (SqlSelect) orderBy.query;
                    // an order-sensitive function like RANK.
                    if (select.getOrderList() == null) {
                        // push ORDER BY into existing select
                        select.setOrderBy(orderBy.orderList);
                        select.setOffset(orderBy.offset);
                        select.setFetch(orderBy.fetch);
                        return select;
                    }
                }
                if (orderBy.query instanceof SqlWith && ((SqlWith) orderBy.query).body instanceof SqlSelect) {
                    SqlWith with = (SqlWith) orderBy.query;
                    SqlSelect select = (SqlSelect) with.body;
                    // an order-sensitive function like RANK.
                    if (select.getOrderList() == null) {
                        // push ORDER BY into existing select
                        select.setOrderBy(orderBy.orderList);
                        select.setOffset(orderBy.offset);
                        select.setFetch(orderBy.fetch);
                        return with;
                    }
                }
                final SqlNodeList selectList = new SqlNodeList(SqlParserPos.ZERO);
                selectList.add(SqlIdentifier.star(SqlParserPos.ZERO));
                final SqlNodeList orderList;
                if (getInnerSelect(node) != null && isAggregate(getInnerSelect(node))) {
                    orderList = SqlNode.clone(orderBy.orderList);
                    // We assume that ORDER BY item is present in SELECT list.
                    for (int i = 0; i < orderList.size(); i++) {
                        SqlNode sqlNode = orderList.get(i);
                        SqlNodeList selectList2 = getInnerSelect(node).getSelectList();
                        for (Ord<SqlNode> sel : Ord.zip(selectList2)) {
                            if (stripAs(sel.e).equalsDeep(sqlNode, Litmus.IGNORE)) {
                                orderList.set(i, SqlLiteral.createExactNumeric(Integer.toString(sel.i + 1), SqlParserPos.ZERO));
                            }
                        }
                    }
                } else {
                    orderList = orderBy.orderList;
                }
                return new SqlSelect(SqlParserPos.ZERO, null, selectList, orderBy.query, null, null, null, null, orderList, orderBy.offset, orderBy.fetch);
            }
        case EXPLICIT_TABLE:
            {
                // (TABLE t) is equivalent to (SELECT * FROM t)
                SqlCall call = (SqlCall) node;
                final SqlNodeList selectList = new SqlNodeList(SqlParserPos.ZERO);
                selectList.add(SqlIdentifier.star(SqlParserPos.ZERO));
                return new SqlSelect(SqlParserPos.ZERO, null, selectList, call.operand(0), null, null, null, null, null, null, null);
            }
        case DELETE:
            {
                SqlDelete call = (SqlDelete) node;
                SqlSelect select = createSourceSelectForDelete(call);
                call.setSourceSelect(select);
                break;
            }
        case UPDATE:
            {
                SqlUpdate call = (SqlUpdate) node;
                SqlSelect select = createSourceSelectForUpdate(call);
                call.setSourceSelect(select);
                // in which case leave it alone).
                if (!validatingSqlMerge) {
                    SqlNode selfJoinSrcExpr = getSelfJoinExprForUpdate(call.getTargetTable(), UPDATE_SRC_ALIAS);
                    if (selfJoinSrcExpr != null) {
                        node = rewriteUpdateToMerge(call, selfJoinSrcExpr);
                    }
                }
                break;
            }
        case MERGE:
            {
                SqlMerge call = (SqlMerge) node;
                rewriteMerge(call);
                break;
            }
    }
    return node;
}

Example 3 with SqlUpdate

use of org.apache.calcite.sql.SqlUpdate in project calcite by apache.

the class SqlValidatorImpl method checkTypeAssignment.

protected void checkTypeAssignment(RelDataType sourceRowType, RelDataType targetRowType, final SqlNode query) {
    // NOTE jvs 23-Feb-2006: subclasses may allow for extra targets
    // representing system-maintained columns, so stop after all sources
    // matched
    List<RelDataTypeField> sourceFields = sourceRowType.getFieldList();
    List<RelDataTypeField> targetFields = targetRowType.getFieldList();
    final int sourceCount = sourceFields.size();
    for (int i = 0; i < sourceCount; ++i) {
        RelDataType sourceType = sourceFields.get(i).getType();
        RelDataType targetType = targetFields.get(i).getType();
        if (!SqlTypeUtil.canAssignFrom(targetType, sourceType)) {
            // FRG-255:  account for UPDATE rewrite; there's
            // probably a better way to do this.
            int iAdjusted = i;
            if (query instanceof SqlUpdate) {
                int nUpdateColumns = ((SqlUpdate) query).getTargetColumnList().size();
                assert sourceFields.size() >= nUpdateColumns;
                iAdjusted -= sourceFields.size() - nUpdateColumns;
            }
            SqlNode node = getNthExpr(query, iAdjusted, sourceCount);
            String targetTypeString;
            String sourceTypeString;
            if (SqlTypeUtil.areCharacterSetsMismatched(sourceType, targetType)) {
                sourceTypeString = sourceType.getFullTypeString();
                targetTypeString = targetType.getFullTypeString();
            } else {
                sourceTypeString = sourceType.toString();
                targetTypeString = targetType.toString();
            }
            throw newValidationError(node, RESOURCE.typeNotAssignable(targetFields.get(i).getName(), targetTypeString, sourceFields.get(i).getName(), sourceTypeString));
        }
    }
}

Example 4 with SqlUpdate

use of org.apache.calcite.sql.SqlUpdate in project calcite by apache.

the class SqlValidatorImpl method registerQuery.

/**
 * Registers a query in a parent scope.
 *
 * @param parentScope Parent scope which this scope turns to in order to
 *                    resolve objects
 * @param usingScope  Scope whose child list this scope should add itself to
 * @param node        Query node
 * @param alias       Name of this query within its parent. Must be specified
 *                    if usingScope != null
 * @param checkUpdate if true, validate that the update feature is supported
 *                    if validating the update statement
 */
private void registerQuery(SqlValidatorScope parentScope, SqlValidatorScope usingScope, SqlNode node, SqlNode enclosingNode, String alias, boolean forceNullable, boolean checkUpdate) {
    Preconditions.checkNotNull(node);
    Preconditions.checkNotNull(enclosingNode);
    Preconditions.checkArgument(usingScope == null || alias != null);
    SqlCall call;
    List<SqlNode> operands;
    switch(node.getKind()) {
        case SELECT:
            final SqlSelect select = (SqlSelect) node;
            final SelectNamespace selectNs = createSelectNamespace(select, enclosingNode);
            registerNamespace(usingScope, alias, selectNs, forceNullable);
            final SqlValidatorScope windowParentScope = (usingScope != null) ? usingScope : parentScope;
            SelectScope selectScope = new SelectScope(parentScope, windowParentScope, select);
            scopes.put(select, selectScope);
            // Start by registering the WHERE clause
            whereScopes.put(select, selectScope);
            registerOperandSubQueries(selectScope, select, SqlSelect.WHERE_OPERAND);
            // Register FROM with the inherited scope 'parentScope', not
            // 'selectScope', otherwise tables in the FROM clause would be
            // able to see each other.
            final SqlNode from = select.getFrom();
            if (from != null) {
                final SqlNode newFrom = registerFrom(parentScope, selectScope, from, from, null, null, false);
                if (newFrom != from) {
                    select.setFrom(newFrom);
                }
            }
            // If this is an aggregating query, the SELECT list and HAVING
            // clause use a different scope, where you can only reference
            // columns which are in the GROUP BY clause.
            SqlValidatorScope aggScope = selectScope;
            if (isAggregate(select)) {
                aggScope = new AggregatingSelectScope(selectScope, select, false);
                selectScopes.put(select, aggScope);
            } else {
                selectScopes.put(select, selectScope);
            }
            if (select.getGroup() != null) {
                GroupByScope groupByScope = new GroupByScope(selectScope, select.getGroup(), select);
                groupByScopes.put(select, groupByScope);
                registerSubQueries(groupByScope, select.getGroup());
            }
            registerOperandSubQueries(aggScope, select, SqlSelect.HAVING_OPERAND);
            registerSubQueries(aggScope, select.getSelectList());
            final SqlNodeList orderList = select.getOrderList();
            if (orderList != null) {
                // available to the ORDER BY clause.
                if (select.isDistinct()) {
                    aggScope = new AggregatingSelectScope(selectScope, select, true);
                }
                OrderByScope orderScope = new OrderByScope(aggScope, orderList, select);
                orderScopes.put(select, orderScope);
                registerSubQueries(orderScope, orderList);
                if (!isAggregate(select)) {
                    // Since this is not an aggregating query,
                    // there cannot be any aggregates in the ORDER BY clause.
                    SqlNode agg = aggFinder.findAgg(orderList);
                    if (agg != null) {
                        throw newValidationError(agg, RESOURCE.aggregateIllegalInOrderBy());
                    }
                }
            }
            break;
        case INTERSECT:
            validateFeature(RESOURCE.sQLFeature_F302(), node.getParserPosition());
            registerSetop(parentScope, usingScope, node, node, alias, forceNullable);
            break;
        case EXCEPT:
            validateFeature(RESOURCE.sQLFeature_E071_03(), node.getParserPosition());
            registerSetop(parentScope, usingScope, node, node, alias, forceNullable);
            break;
        case UNION:
            registerSetop(parentScope, usingScope, node, node, alias, forceNullable);
            break;
        case WITH:
            registerWith(parentScope, usingScope, (SqlWith) node, enclosingNode, alias, forceNullable, checkUpdate);
            break;
        case VALUES:
            call = (SqlCall) node;
            scopes.put(call, parentScope);
            final TableConstructorNamespace tableConstructorNamespace = new TableConstructorNamespace(this, call, parentScope, enclosingNode);
            registerNamespace(usingScope, alias, tableConstructorNamespace, forceNullable);
            operands = call.getOperandList();
            for (int i = 0; i < operands.size(); ++i) {
                assert operands.get(i).getKind() == SqlKind.ROW;
                // FIXME jvs 9-Feb-2005:  Correlation should
                // be illegal in these sub-queries.  Same goes for
                // any non-lateral SELECT in the FROM list.
                registerOperandSubQueries(parentScope, call, i);
            }
            break;
        case INSERT:
            SqlInsert insertCall = (SqlInsert) node;
            InsertNamespace insertNs = new InsertNamespace(this, insertCall, enclosingNode, parentScope);
            registerNamespace(usingScope, null, insertNs, forceNullable);
            registerQuery(parentScope, usingScope, insertCall.getSource(), enclosingNode, null, false);
            break;
        case DELETE:
            SqlDelete deleteCall = (SqlDelete) node;
            DeleteNamespace deleteNs = new DeleteNamespace(this, deleteCall, enclosingNode, parentScope);
            registerNamespace(usingScope, null, deleteNs, forceNullable);
            registerQuery(parentScope, usingScope, deleteCall.getSourceSelect(), enclosingNode, null, false);
            break;
        case UPDATE:
            if (checkUpdate) {
                validateFeature(RESOURCE.sQLFeature_E101_03(), node.getParserPosition());
            }
            SqlUpdate updateCall = (SqlUpdate) node;
            UpdateNamespace updateNs = new UpdateNamespace(this, updateCall, enclosingNode, parentScope);
            registerNamespace(usingScope, null, updateNs, forceNullable);
            registerQuery(parentScope, usingScope, updateCall.getSourceSelect(), enclosingNode, null, false);
            break;
        case MERGE:
            validateFeature(RESOURCE.sQLFeature_F312(), node.getParserPosition());
            SqlMerge mergeCall = (SqlMerge) node;
            MergeNamespace mergeNs = new MergeNamespace(this, mergeCall, enclosingNode, parentScope);
            registerNamespace(usingScope, null, mergeNs, forceNullable);
            registerQuery(parentScope, usingScope, mergeCall.getSourceSelect(), enclosingNode, null, false);
            // validation check
            if (mergeCall.getUpdateCall() != null) {
                registerQuery(whereScopes.get(mergeCall.getSourceSelect()), null, mergeCall.getUpdateCall(), enclosingNode, null, false, false);
            }
            if (mergeCall.getInsertCall() != null) {
                registerQuery(parentScope, null, mergeCall.getInsertCall(), enclosingNode, null, false);
            }
            break;
        case UNNEST:
            call = (SqlCall) node;
            final UnnestNamespace unnestNs = new UnnestNamespace(this, call, parentScope, enclosingNode);
            registerNamespace(usingScope, alias, unnestNs, forceNullable);
            registerOperandSubQueries(parentScope, call, 0);
            scopes.put(node, parentScope);
            break;
        case OTHER_FUNCTION:
            call = (SqlCall) node;
            ProcedureNamespace procNs = new ProcedureNamespace(this, parentScope, call, enclosingNode);
            registerNamespace(usingScope, alias, procNs, forceNullable);
            registerSubQueries(parentScope, call);
            break;
        case MULTISET_QUERY_CONSTRUCTOR:
        case MULTISET_VALUE_CONSTRUCTOR:
            validateFeature(RESOURCE.sQLFeature_S271(), node.getParserPosition());
            call = (SqlCall) node;
            CollectScope cs = new CollectScope(parentScope, usingScope, call);
            final CollectNamespace tableConstructorNs = new CollectNamespace(call, cs, enclosingNode);
            final String alias2 = deriveAlias(node, nextGeneratedId++);
            registerNamespace(usingScope, alias2, tableConstructorNs, forceNullable);
            operands = call.getOperandList();
            for (int i = 0; i < operands.size(); i++) {
                registerOperandSubQueries(parentScope, call, i);
            }
            break;
        default:
            throw Util.unexpected(node.getKind());
    }
}

Example 5 with SqlUpdate

use of org.apache.calcite.sql.SqlUpdate in project calcite by apache.

the class SqlToRelConverter method convertMerge.

private RelNode convertMerge(SqlMerge call) {
    RelOptTable targetTable = getTargetTable(call);
    // convert update column list from SqlIdentifier to String
    final List<String> targetColumnNameList = new ArrayList<>();
    final RelDataType targetRowType = targetTable.getRowType();
    SqlUpdate updateCall = call.getUpdateCall();
    if (updateCall != null) {
        for (SqlNode targetColumn : updateCall.getTargetColumnList()) {
            SqlIdentifier id = (SqlIdentifier) targetColumn;
            RelDataTypeField field = SqlValidatorUtil.getTargetField(targetRowType, typeFactory, id, catalogReader, targetTable);
            assert field != null : "column " + id.toString() + " not found";
            targetColumnNameList.add(field.getName());
        }
    }
    // replace the projection of the source select with a
    // projection that contains the following:
    // 1) the expressions corresponding to the new insert row (if there is
    // an insert)
    // 2) all columns from the target table (if there is an update)
    // 3) the set expressions in the update call (if there is an update)
    // first, convert the merge's source select to construct the columns
    // from the target table and the set expressions in the update call
    RelNode mergeSourceRel = convertSelect(call.getSourceSelect(), false);
    // then, convert the insert statement so we can get the insert
    // values expressions
    SqlInsert insertCall = call.getInsertCall();
    int nLevel1Exprs = 0;
    List<RexNode> level1InsertExprs = null;
    List<RexNode> level2InsertExprs = null;
    if (insertCall != null) {
        RelNode insertRel = convertInsert(insertCall);
        // if there are 2 level of projections in the insert source, combine
        // them into a single project; level1 refers to the topmost project;
        // the level1 projection contains references to the level2
        // expressions, except in the case where no target expression was
        // provided, in which case, the expression is the default value for
        // the column; or if the expressions directly map to the source
        // table
        level1InsertExprs = ((LogicalProject) insertRel.getInput(0)).getProjects();
        if (insertRel.getInput(0).getInput(0) instanceof LogicalProject) {
            level2InsertExprs = ((LogicalProject) insertRel.getInput(0).getInput(0)).getProjects();
        }
        nLevel1Exprs = level1InsertExprs.size();
    }
    LogicalJoin join = (LogicalJoin) mergeSourceRel.getInput(0);
    int nSourceFields = join.getLeft().getRowType().getFieldCount();
    final List<RexNode> projects = new ArrayList<>();
    for (int level1Idx = 0; level1Idx < nLevel1Exprs; level1Idx++) {
        if ((level2InsertExprs != null) && (level1InsertExprs.get(level1Idx) instanceof RexInputRef)) {
            int level2Idx = ((RexInputRef) level1InsertExprs.get(level1Idx)).getIndex();
            projects.add(level2InsertExprs.get(level2Idx));
        } else {
            projects.add(level1InsertExprs.get(level1Idx));
        }
    }
    if (updateCall != null) {
        final LogicalProject project = (LogicalProject) mergeSourceRel;
        projects.addAll(Util.skip(project.getProjects(), nSourceFields));
    }
    relBuilder.push(join).project(projects);
    return LogicalTableModify.create(targetTable, catalogReader, relBuilder.build(), LogicalTableModify.Operation.MERGE, targetColumnNameList, null, false);
}