/** Converts a non-query node into a SELECT node. Set operators (UNION, * INTERSECT, EXCEPT) remain as is. */ public SqlSelect asSelect() { if (node instanceof SqlSelect) { return (SqlSelect) node; } if (!dialect.hasImplicitTableAlias()) { return wrapSelect(asFrom()); } return wrapSelect(node); }
/** Converts a non-query node into a SELECT node. Set operators (UNION, * INTERSECT, EXCEPT) remain as is. */ public SqlSelect asSelect() { if (node instanceof SqlSelect) { return (SqlSelect) node; } if (!dialect.hasImplicitTableAlias()) { return wrapSelect(asFrom()); } return wrapSelect(node); }
/** Creates a result based on a single relational expression. */ public Result result(SqlNode node, Collection<Clause> clauses, RelNode rel, Map<String, RelDataType> aliases) { assert aliases == null || aliases.size() < 2 || aliases instanceof LinkedHashMap || aliases instanceof ImmutableMap : "must use a Map implementation that preserves order"; final String alias2 = SqlValidatorUtil.getAlias(node, -1); final String alias3 = alias2 != null ? alias2 : "t"; final String alias4 = SqlValidatorUtil.uniquify( alias3, aliasSet, SqlValidatorUtil.EXPR_SUGGESTER); if (aliases != null && !aliases.isEmpty() && (!dialect.hasImplicitTableAlias() || aliases.size() > 1)) { return new Result(node, clauses, alias4, rel.getRowType(), aliases); } final String alias5; if (alias2 == null || !alias2.equals(alias4) || !dialect.hasImplicitTableAlias()) { alias5 = alias4; } else { alias5 = null; } return new Result(node, clauses, alias5, rel.getRowType(), ImmutableMap.of(alias4, rel.getRowType())); }
/** Creates a result based on a single relational expression. */ public Result result(SqlNode node, Collection<Clause> clauses, RelNode rel, Map<String, RelDataType> aliases) { assert aliases == null || aliases.size() < 2 || aliases instanceof LinkedHashMap || aliases instanceof ImmutableMap : "must use a Map implementation that preserves order"; final String alias2 = SqlValidatorUtil.getAlias(node, -1); final String alias3 = alias2 != null ? alias2 : "t"; final String alias4 = SqlValidatorUtil.uniquify( alias3, aliasSet, SqlValidatorUtil.EXPR_SUGGESTER); if (aliases != null && !aliases.isEmpty() && (!dialect.hasImplicitTableAlias() || aliases.size() > 1)) { return new Result(node, clauses, alias4, rel.getRowType(), aliases); } final String alias5; if (alias2 == null || !alias2.equals(alias4) || !dialect.hasImplicitTableAlias()) { alias5 = alias4; } else { alias5 = null; } return new Result(node, clauses, alias5, rel.getRowType(), ImmutableMap.of(alias4, rel.getRowType())); }
} else { boolean qualified = !dialect.hasImplicitTableAlias() || aliases.size() > 1;
} else { boolean qualified = !dialect.hasImplicitTableAlias() || aliases.size() > 1;