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improve sql-wal
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@@ -52,12 +52,6 @@ public class SQLUnaryExpr extends SQLExprImpl implements Serializable {
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this.expr = expr;
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}
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@Override
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public void output(StringBuffer buf) {
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buf.append(" NOT ");
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this.expr.output(buf);
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}
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protected void accept0(SQLASTVisitor visitor) {
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if (visitor.visit(this)) {
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acceptChild(visitor, this.expr);
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