/** Clones a SqlNode with a different position. */ public SqlNode clone(SqlParserPos pos) { // REVIEW jvs 26-July-2006: shouldn't pos be used here? Or are // subclasses always supposed to override, in which case this // method should probably be abstract? try { return (SqlNode) super.clone(); } catch (CloneNotSupportedException e) { throw Util.newInternal(e, "error while cloning " + this); } }
/** * Creates a node. * * @param pos Parser position, must not be null. */ SqlNode(SqlParserPos pos) { Util.pre(pos != null, "pos != null"); this.pos = pos; }
/** * Validates this node in an expression context. * * <p>Usually, this method does much the same as {@link #validate}, but a {@link SqlIdentifier} * can occur in expression and non-expression contexts. */ public void validateExpr(SqlValidator validator, SqlValidatorScope scope) { validate(validator, scope); Util.discard(validator.deriveType(scope, this)); }