001package gudusoft.gsqlparser.pp2.island;
002
003/**
004 * Why an {@link IslandScope} is incomplete. {@link #NONE} means the island is
005 * complete/well-formed.
006 *
007 * <p>Plan reference: §7.3/S22, §7.4/S22.
008 */
009public enum IncompleteReason {
010
011    /** Island is well-formed. */
012    NONE,
013
014    /** A {@code CASE} (or {@code BEGIN}) block has no matching {@code END}. */
015    MISSING_END,
016
017    /** A parenthesised group / subquery was never closed. */
018    UNCLOSED_PAREN,
019
020    /** A clause keyword (WHERE/FROM/GROUP BY/...) has no operand. */
021    MISSING_OPERAND,
022
023    /** Span could not be classified and is treated as an error region. */
024    UNRECOVERABLE
025}