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

Example 91 with Expression

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

the class MySQLOutputASTVisitor method visit.

@Override
public void visit(BetweenAndExpression node) {
    Expression comparee = node.getFirst();
    boolean paren = comparee.getPrecedence() <= node.getPrecedence();
    if (paren)
        appendable.append('(');
    comparee.accept(this);
    if (paren)
        appendable.append(')');
    if (node.isNot())
        appendable.append(" NOT BETWEEN ");
    else
        appendable.append(" BETWEEN ");
    Expression start = node.getSecond();
    paren = start.getPrecedence() < node.getPrecedence();
    if (paren)
        appendable.append('(');
    start.accept(this);
    if (paren)
        appendable.append(')');
    appendable.append(" AND ");
    Expression end = node.getThird();
    paren = end.getPrecedence() < node.getPrecedence();
    if (paren)
        appendable.append('(');
    end.accept(this);
    if (paren)
        appendable.append(')');
}

Example 92 with Expression

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

the class MySQLOutputASTVisitor method visit.

@Override
public void visit(MatchExpression node) {
    appendable.append("MATCH (");
    printList(node.getColumns());
    appendable.append(") AGAINST (");
    Expression pattern = node.getPattern();
    boolean inparen = containsCompIn(pattern);
    if (inparen)
        appendable.append('(');
    pattern.accept(this);
    if (inparen)
        appendable.append(')');
    switch(node.getModifier()) {
        case IN_BOOLEAN_MODE:
            appendable.append(" IN BOOLEAN MODE");
            break;
        case IN_NATURAL_LANGUAGE_MODE:
            appendable.append(" IN NATURAL LANGUAGE MODE");
            break;
        case IN_NATURAL_LANGUAGE_MODE_WITH_QUERY_EXPANSION:
            appendable.append(" IN NATURAL LANGUAGE MODE WITH QUERY EXPANSION");
            break;
        case WITH_QUERY_EXPANSION:
            appendable.append(" WITH QUERY EXPANSION");
            break;
        case _DEFAULT:
            break;
        default:
            throw new IllegalArgumentException("unkown modifier for match expression: " + node.getModifier());
    }
    appendable.append(')');
}

Example 93 with Expression

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

the class MySQLOutputASTVisitor method visit.

@Override
public void visit(PolyadicOperatorExpression node) {
    for (int i = 0, len = node.getArity(); i < len; ++i) {
        if (i > 0)
            appendable.append(' ').append(node.getOperator()).append(' ');
        Expression operand = node.getOperand(i);
        boolean paren = operand.getPrecedence() < node.getPrecedence();
        if (paren)
            appendable.append('(');
        operand.accept(this);
        if (paren)
            appendable.append(')');
    }
}

Example 94 with Expression

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

the class MySQLOutputASTVisitor method visit.

@Override
public void visit(GroupConcat node) {
    String functionName = node.getFunctionName();
    appendable.append(functionName).append('(');
    if (node.isDistinct()) {
        appendable.append("DISTINCT ");
    }
    printList(node.getArguments());
    Expression orderBy = node.getOrderBy();
    if (orderBy != null) {
        appendable.append(" ORDER BY ");
        orderBy.accept(this);
        if (node.isDesc())
            appendable.append(" DESC");
        else
            appendable.append(" ASC");
        List<Expression> list = node.getAppendedColumnNames();
        if (list != null && !list.isEmpty()) {
            appendable.append(", ");
            printList(list);
        }
    }
    String sep = node.getSeparator();
    if (sep != null) {
        appendable.append(" SEPARATOR ").append(sep);
    }
    appendable.append(')');
}

Example 95 with Expression

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

the class PartitionByString 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);
}