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

Example 31 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(GroupBy node) {
    appendable.append("GROUP BY ");
    boolean isFst = true;
    for (Pair<Expression, SortOrder> p : node.getOrderByList()) {
        if (isFst)
            isFst = false;
        else
            appendable.append(", ");
        Expression col = p.getKey();
        col.accept(this);
        switch(p.getValue()) {
            case DESC:
                appendable.append(" DESC");
                break;
        }
    }
    if (node.isWithRollup()) {
        appendable.append(" WITH ROLLUP");
    }
}

Example 32 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(ComparisionIsExpression node) {
    Expression comparee = node.getOperand();
    boolean paren = comparee.getPrecedence() < node.getPrecedence();
    if (paren)
        appendable.append('(');
    comparee.accept(this);
    if (paren)
        appendable.append(')');
    switch(node.getMode()) {
        case IS_NULL:
            appendable.append(" IS NULL");
            break;
        case IS_TRUE:
            appendable.append(" IS TRUE");
            break;
        case IS_FALSE:
            appendable.append(" IS FALSE");
            break;
        case IS_UNKNOWN:
            appendable.append(" IS UNKNOWN");
            break;
        case IS_NOT_NULL:
            appendable.append(" IS NOT NULL");
            break;
        case IS_NOT_TRUE:
            appendable.append(" IS NOT TRUE");
            break;
        case IS_NOT_FALSE:
            appendable.append(" IS NOT FALSE");
            break;
        case IS_NOT_UNKNOWN:
            appendable.append(" IS NOT UNKNOWN");
            break;
        default:
            throw new IllegalArgumentException("unknown mode for IS expression: " + node.getMode());
    }
}

Example 33 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(DMLDeleteStatement node) {
    appendable.append("DELETE ");
    if (node.isLowPriority())
        appendable.append("LOW_PRIORITY ");
    if (node.isQuick())
        appendable.append("QUICK ");
    if (node.isIgnore())
        appendable.append("IGNORE ");
    TableReferences tableRefs = node.getTableRefs();
    if (tableRefs == null) {
        appendable.append("FROM ");
        node.getTableNames().get(0).accept(this);
    } else {
        printList(node.getTableNames());
        appendable.append(" FROM ");
        node.getTableRefs().accept(this);
    }
    Expression where = node.getWhereCondition();
    if (where != null) {
        appendable.append(" WHERE ");
        where.accept(this);
    }
    OrderBy orderBy = node.getOrderBy();
    if (orderBy != null) {
        appendable.append(' ');
        orderBy.accept(this);
    }
    Limit limit = node.getLimit();
    if (limit != null) {
        appendable.append(' ');
        limit.accept(this);
    }
}

Example 34 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(Cast node) {
    String functionName = node.getFunctionName();
    appendable.append(functionName).append('(');
    node.getExpr().accept(this);
    appendable.append(" AS ");
    String typeName = node.getTypeName();
    appendable.append(typeName);
    Expression info1 = node.getTypeInfo1();
    if (info1 != null) {
        appendable.append('(');
        info1.accept(this);
        Expression info2 = node.getTypeInfo2();
        if (info2 != null) {
            appendable.append(", ");
            info2.accept(this);
        }
        appendable.append(')');
    }
    appendable.append(')');
}

Example 35 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(ShowGrants node) {
    appendable.append("SHOW GRANTS");
    Expression user = node.getUser();
    if (user != null) {
        appendable.append(" FOR ");
        user.accept(this);
    }
}