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

Example 36 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(Identifier node) {
    Expression parent = node.getParent();
    if (parent != null) {
        parent.accept(this);
        appendable.append('.');
    }
    appendable.append(node.getIdText());
}

Example 37 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(StraightJoin node) {
    TableReference left = node.getLeftTableRef();
    boolean paren = left.getPrecedence() < node.getPrecedence();
    if (paren)
        appendable.append('(');
    left.accept(this);
    if (paren)
        appendable.append(')');
    appendable.append(" STRAIGHT_JOIN ");
    TableReference right = node.getRightTableRef();
    paren = right.getPrecedence() <= node.getPrecedence();
    if (paren)
        appendable.append('(');
    right.accept(this);
    if (paren)
        appendable.append(')');
    Expression on = node.getOnCond();
    if (on != null) {
        appendable.append(" ON ");
        on.accept(this);
    }
}

Example 38 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(DMLInsertStatement node) {
    appendable.append("INSERT ");
    switch(node.getMode()) {
        case DELAY:
            appendable.append("DELAYED ");
            break;
        case HIGH:
            appendable.append("HIGH_PRIORITY ");
            break;
        case LOW:
            appendable.append("LOW_PRIORITY ");
            break;
        case UNDEF:
            break;
        default:
            throw new IllegalArgumentException("unknown mode for INSERT: " + node.getMode());
    }
    if (node.isIgnore())
        appendable.append("IGNORE ");
    appendable.append("INTO ");
    node.getTable().accept(this);
    appendable.append(' ');
    List<Identifier> cols = node.getColumnNameList();
    if (cols != null && !cols.isEmpty()) {
        appendable.append('(');
        printList(cols);
        appendable.append(") ");
    }
    QueryExpression select = node.getSelect();
    if (select == null) {
        appendable.append("VALUES ");
        List<RowExpression> rows = node.getRowList();
        if (rows != null && !rows.isEmpty()) {
            boolean isFst = true;
            for (RowExpression row : rows) {
                if (row == null || row.getRowExprList().isEmpty())
                    continue;
                if (isFst)
                    isFst = false;
                else
                    appendable.append(", ");
                appendable.append('(');
                printList(row.getRowExprList());
                appendable.append(')');
            }
        } else {
            throw new IllegalArgumentException("at least one row for INSERT");
        }
    } else {
        select.accept(this);
    }
    List<Pair<Identifier, Expression>> dup = node.getDuplicateUpdate();
    if (dup != null && !dup.isEmpty()) {
        appendable.append(" ON DUPLICATE KEY UPDATE ");
        boolean isFst = true;
        for (Pair<Identifier, Expression> p : dup) {
            if (isFst)
                isFst = false;
            else
                appendable.append(", ");
            p.getKey().accept(this);
            appendable.append(" = ");
            p.getValue().accept(this);
        }
    }
}

Example 39 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(Trim node) {
    String functionName = node.getFunctionName();
    appendable.append(functionName).append('(');
    Expression remStr = node.getRemainString();
    switch(node.getDirection()) {
        case DEFAULT:
            if (remStr != null) {
                remStr.accept(this);
                appendable.append(" FROM ");
            }
            break;
        case BOTH:
            appendable.append("BOTH ");
            if (remStr != null)
                remStr.accept(this);
            appendable.append(" FROM ");
            break;
        case LEADING:
            appendable.append("LEADING ");
            if (remStr != null)
                remStr.accept(this);
            appendable.append(" FROM ");
            break;
        case TRAILING:
            appendable.append("TRAILING ");
            if (remStr != null)
                remStr.accept(this);
            appendable.append(" FROM ");
            break;
        default:
            throw new IllegalArgumentException("unknown trim direction: " + node.getDirection());
    }
    Expression str = node.getString();
    str.accept(this);
    appendable.append(')');
}

Example 40 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(IntervalPrimary node) {
    appendable.append("INTERVAL ");
    Expression quantity = node.getQuantity();
    boolean paren = quantity.getPrecedence() < node.getPrecedence();
    if (paren)
        appendable.append('(');
    quantity.accept(this);
    if (paren)
        appendable.append(')');
    IntervalPrimary.Unit unit = node.getUnit();
    appendable.append(' ').append(unit.name());
}