Package com.facebook.presto.sql.tree

Examples of com.facebook.presto.sql.tree.Cast

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            if (!column.isPartitionKey()) {
                continue;
            }
            Expression key = equal(nameReference("partition_key"), new StringLiteral(column.getName()));
            Expression value = caseWhen(key, nameReference("partition_value"));
            value = new Cast(value, column.getType().getName());
            Expression function = functionCall("max", value);
            selectList.add(new SingleColumn(function, column.getName()));
            wrappedList.add(unaliasedName(column.getName()));
        }
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        public Object visitCast(Cast node, Object context)
        {
            Object value = process(node.getExpression(), context);

            if (value instanceof Expression) {
                return new Cast((Expression) value, node.getType(), node.isSafe());
            }

            // hack!!! don't optimize CASTs for types that cannot be represented in the SQL AST
            // TODO: this will not be an issue when we migrate to RowExpression tree for this, which allows arbitrary literals.
            if (optimize && !FunctionRegistry.isSupportedLiteralType(expressionTypes.get(node))) {
                return new Cast(toExpression(value, expressionTypes.get(node.getExpression())), node.getType(), node.isSafe());
            }

            if (value == null) {
                return null;
            }
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            if (!column.isPartitionKey()) {
                continue;
            }
            Expression key = equal(nameReference("partition_key"), new StringLiteral(column.getName()));
            Expression value = caseWhen(key, nameReference("partition_value"));
            value = new Cast(value, Type.fromRaw(column.getType()).getName());
            Expression function = functionCall("max", value);
            selectList.add(new SingleColumn(function, column.getName()));
            wrappedList.add(unaliasedName(column.getName()));
        }
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        public Object visitCast(Cast node, Object context)
        {
            Object value = process(node.getExpression(), context);

            if (value instanceof Expression) {
                return new Cast((Expression) value, node.getType());
            }

            if (value == null) {
                return null;
            }
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                Expression rewrittenExpression = treeRewriter.defaultRewrite(node, context);

                // cast expression if coercion is registered
                Type coercion = analysis.getCoercion(node);
                if (coercion != null) {
                    rewrittenExpression = new Cast(rewrittenExpression, coercion.getName());
                }

                return rewrittenExpression;
            }
        }, parsedExpression);
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                Expression rewrittenExpression = treeRewriter.defaultRewrite(node, context);

                // cast expression if coercion is registered
                Type coercion = analysis.getCoercion(node);
                if (coercion != null) {
                    rewrittenExpression = new Cast(rewrittenExpression, coercion.getName());
                }

                return rewrittenExpression;
            }
        }, parsedExpression);
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        public Object visitCast(Cast node, Object context)
        {
            Object value = process(node.getExpression(), context);

            if (value instanceof Expression) {
                return new Cast((Expression) value, node.getType(), node.isSafe());
            }

            // hack!!! don't optimize CASTs for types that cannot be represented in the SQL AST
            // TODO: this will not be an issue when we migrate to RowExpression tree for this, which allows arbitrary literals.
            if (optimize && !FunctionRegistry.isSupportedLiteralType(expressionTypes.get(node))) {
                return new Cast(toExpression(value, expressionTypes.get(node.getExpression())), node.getType(), node.isSafe());
            }

            if (value == null) {
                return null;
            }
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        if (object instanceof Expression) {
            return (Expression) object;
        }

        if (object == null) {
            return new Cast(new NullLiteral(), type.getName());
        }

        if (type.equals(BIGINT)) {
            return new LongLiteral(object.toString());
        }
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            if (!column.isPartitionKey()) {
                continue;
            }
            Expression key = equal(nameReference("partition_key"), new StringLiteral(column.getName()));
            Expression value = caseWhen(key, nameReference("partition_value"));
            value = new Cast(value, column.getType().getName());
            Expression function = functionCall("max", value);
            selectList.add(new SingleColumn(function, column.getName()));
            wrappedList.add(unaliasedName(column.getName()));
        }
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        for (Expression expression : expressions) {
            Type coercion = analysis.getCoercion(expression);
            Symbol symbol = symbolAllocator.newSymbol(expression, Objects.firstNonNull(coercion, analysis.getType(expression)));
            Expression rewritten = subPlan.rewrite(expression);
            if (coercion != null) {
                rewritten = new Cast(rewritten, coercion.getName());
            }
            projections.put(symbol, rewritten);
            translations.put(expression, symbol);
        }
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Related Classes of com.facebook.presto.sql.tree.Cast

  • com.facebook.presto.operator.scalar.FunctionAssertions
  • com.facebook.presto.sql.analyzer.StatementAnalyzer
  • com.facebook.presto.sql.parser.TestSqlParser
  • com.facebook.presto.sql.planner.ExpressionInterpreter$Visitor
  • com.facebook.presto.sql.planner.LiteralInterpreter
  • com.facebook.presto.sql.planner.QueryPlanner
  • com.facebook.presto.sql.planner.TranslationMap
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