Examples with Expression com.alibaba.cobar.parser.ast.expression.Expression used on opensource projects

Example 46 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class PartitionKeyVisitor method visit.

@Override
public void visit(ComparisionIsExpression node) {
    Expression operand = node.getOperand();
    visitChild(2, false, false, operand);
    if (verdictColumn && (operand instanceof Identifier)) {
        Identifier col = (Identifier) operand;
        String table = tableAlias.get(col.getLevelUnescapeUpName(2));
        if (isRuledColumn(table, col.getIdTextUpUnescape())) {
            switch(node.getMode()) {
                case ComparisionIsExpression.IS_FALSE:
                    addColumnValue(table, col.getIdTextUpUnescape(), LiteralBoolean.FALSE, node, null);
                    break;
                case ComparisionIsExpression.IS_TRUE:
                    addColumnValue(table, col.getIdTextUpUnescape(), LiteralBoolean.TRUE, node, null);
                    break;
                case ComparisionIsExpression.IS_NULL:
                    addColumnValue(table, col.getIdTextUpUnescape(), null, node, null);
                    break;
            }
        }
    }
}

Example 47 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class PartitionByLong method constructFunction.

@Override
public FunctionExpression constructFunction(List<Expression> arguments) {
    if (arguments == null || arguments.size() != 1)
        throw new IllegalArgumentException("function " + getFunctionName() + " must have 1 argument but is " + arguments);
    Object[] args = new Object[arguments.size()];
    int i = -1;
    for (Expression arg : arguments) {
        args[++i] = arg;
    }
    return (FunctionExpression) constructMe(args);
}

Example 48 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class PartitionKeyVisitor method visit.

@Override
public void visit(BinaryOperatorExpression node) {
    Expression left = node.getLeftOprand();
    Expression right = node.getRightOprand();
    visitChild(2, false, false, left, right);
}

Example 49 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class PartitionKeyVisitor method visit.

@Override
public void visit(DMLDeleteStatement node) {
    TableReference tr = node.getTableRefs();
    List<Identifier> tbs = node.getTableNames();
    if (tr == null) {
        Identifier table = tbs.get(0);
        tableAsTableFactor(table);
    } else {
        visitChild(1, verdictColumn, false, tr);
        for (Identifier tb : tbs) {
            if (tb instanceof Wildcard) {
                int trim = tb.trimParent(2, trimSchema);
                schemaTrimmed = schemaTrimmed || trim == Identifier.PARENT_TRIMED;
                customedSchema = customedSchema || trim == Identifier.PARENT_IGNORED;
            } else {
                int trim = tb.trimParent(1, trimSchema);
                schemaTrimmed = schemaTrimmed || trim == Identifier.PARENT_TRIMED;
                customedSchema = customedSchema || trim == Identifier.PARENT_IGNORED;
            }
        }
    }
    Expression where = node.getWhereCondition();
    visitChild(2, verdictColumn, false, where);
    if (tr == null) {
        OrderBy order = node.getOrderBy();
        visitChild(2, false, false, order);
    }
}

Example 50 with Expression

use of com.alibaba.cobar.parser.ast.expression.Expression in project cobar by alibaba.

the class PartitionKeyVisitor method visit.

@Override
public void visit(BetweenAndExpression node) {
    Expression fst = node.getFirst();
    Expression snd = node.getSecond();
    Expression trd = node.getThird();
    visitChild(2, false, false, fst, snd, trd);
    if (verdictColumn && !node.isNot() && fst instanceof Identifier) {
        Identifier col = (Identifier) fst;
        String table = tableAlias.get(col.getLevelUnescapeUpName(2));
        if (isRuledColumn(table, col.getIdTextUpUnescape())) {
            Object e1 = snd.evaluation(evaluationParameter);
            Object e2 = trd.evaluation(evaluationParameter);
            if (e1 != Expression.UNEVALUATABLE && e2 != Expression.UNEVALUATABLE && e1 != null && e2 != null) {
                if (compareEvaluatedValue(e1, e2)) {
                    addColumnValue(table, col.getIdTextUpUnescape(), e1, node, null);
                }
            }
        }
    }
}