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| 1 | +/*- |
| 2 | + * #%L |
| 3 | + * JSQLParser library |
| 4 | + * %% |
| 5 | + * Copyright (C) 2004 - 2026 JSQLParser |
| 6 | + * %% |
| 7 | + * Dual licensed under GNU LGPL 2.1 or Apache License 2.0 |
| 8 | + * #L% |
| 9 | + */ |
| 10 | +package net.sf.jsqlparser.expression; |
| 11 | + |
| 12 | +import static org.junit.jupiter.api.Assertions.assertEquals; |
| 13 | +import static org.junit.jupiter.api.Assertions.assertNull; |
| 14 | + |
| 15 | +import java.util.ArrayList; |
| 16 | +import java.util.List; |
| 17 | +import net.sf.jsqlparser.JSQLParserException; |
| 18 | +import net.sf.jsqlparser.expression.operators.relational.ParenthesedExpressionList; |
| 19 | +import net.sf.jsqlparser.parser.CCJSqlParserUtil; |
| 20 | +import net.sf.jsqlparser.schema.Column; |
| 21 | +import net.sf.jsqlparser.statement.select.AllColumns; |
| 22 | +import net.sf.jsqlparser.statement.select.PlainSelect; |
| 23 | +import net.sf.jsqlparser.util.deparser.StatementDeParser; |
| 24 | +import org.junit.jupiter.api.Test; |
| 25 | +import org.junit.jupiter.params.ParameterizedTest; |
| 26 | +import org.junit.jupiter.params.provider.ValueSource; |
| 27 | + |
| 28 | +class ColumnsTransformerTest { |
| 29 | + |
| 30 | + @ParameterizedTest |
| 31 | + @ValueSource(strings = {"*", "t.*", "COLUMNS('m')"}) |
| 32 | + void testExceptColumnsReplacePattern(String matcher) throws JSQLParserException { |
| 33 | + PlainSelect select = (PlainSelect) CCJSqlParserUtil.parse( |
| 34 | + "SELECT " + matcher + " EXCEPT STRICT '^tmp_' FROM t"); |
| 35 | + Expression expression = select.getSelectItem(0).getExpression(); |
| 36 | + ColumnsTransformer transformer = getTransformer(expression); |
| 37 | + transformer.setExceptColumns(new ParenthesedExpressionList<>(new Column("keep"))); |
| 38 | + |
| 39 | + assertOutput("SELECT " + matcher + " EXCEPT STRICT (keep) FROM t", select); |
| 40 | + assertNull(transformer.getExceptPattern()); |
| 41 | + if (expression instanceof ColumnsExpression) { |
| 42 | + assertVisitedValues(List.of("m", "keep"), expression); |
| 43 | + } |
| 44 | + } |
| 45 | + |
| 46 | + @ParameterizedTest |
| 47 | + @ValueSource(strings = {"*", "t.*", "COLUMNS('m')"}) |
| 48 | + void testExceptPatternReplacesColumns(String matcher) throws JSQLParserException { |
| 49 | + PlainSelect select = (PlainSelect) CCJSqlParserUtil.parse( |
| 50 | + "SELECT " + matcher + " EXCEPT STRICT (keep) FROM t"); |
| 51 | + Expression expression = select.getSelectItem(0).getExpression(); |
| 52 | + ColumnsTransformer transformer = getTransformer(expression); |
| 53 | + transformer.setExceptPattern(new StringValue("'^tmp_'")); |
| 54 | + |
| 55 | + assertOutput("SELECT " + matcher + " EXCEPT STRICT '^tmp_' FROM t", select); |
| 56 | + if (expression instanceof ColumnsExpression) { |
| 57 | + assertVisitedValues(List.of("m", "^tmp_"), expression); |
| 58 | + } |
| 59 | + assertNull(transformer.getExceptColumns()); |
| 60 | + } |
| 61 | + |
| 62 | + @Test |
| 63 | + void testClearingPatternPreservesColumns() { |
| 64 | + ColumnsTransformer transformer = |
| 65 | + new ColumnsTransformer(ColumnsTransformer.ColumnsTransformerType.EXCEPT) |
| 66 | + .setExceptColumns(new ParenthesedExpressionList<>(new Column("keep"))) |
| 67 | + .setExceptPattern(null); |
| 68 | + assertEquals("EXCEPT (keep)", transformer.toString()); |
| 69 | + } |
| 70 | + |
| 71 | + @Test |
| 72 | + void testClearingColumnsPreservesPattern() { |
| 73 | + ColumnsTransformer transformer = |
| 74 | + new ColumnsTransformer(ColumnsTransformer.ColumnsTransformerType.EXCEPT) |
| 75 | + .setExceptPattern(new StringValue("'^tmp_'")) |
| 76 | + .setExceptColumns(null); |
| 77 | + assertEquals("EXCEPT '^tmp_'", transformer.toString()); |
| 78 | + } |
| 79 | + |
| 80 | + private static ColumnsTransformer getTransformer(Expression expression) { |
| 81 | + return expression instanceof AllColumns |
| 82 | + ? ((AllColumns) expression).getTransformers().get(0) |
| 83 | + : ((ColumnsExpression) expression).getTransformers().get(0); |
| 84 | + } |
| 85 | + |
| 86 | + private static void assertOutput(String expected, PlainSelect select) |
| 87 | + throws JSQLParserException { |
| 88 | + assertEquals(expected, select.toString()); |
| 89 | + StatementDeParser deparser = new StatementDeParser(new StringBuilder()); |
| 90 | + select.accept(deparser, null); |
| 91 | + assertEquals(expected, deparser.getBuilder().toString()); |
| 92 | + assertEquals(expected, CCJSqlParserUtil.parse(expected).toString()); |
| 93 | + } |
| 94 | + |
| 95 | + private static void assertVisitedValues(List<String> expected, Expression expression) { |
| 96 | + List<String> visited = new ArrayList<>(); |
| 97 | + expression.accept(new ExpressionVisitorAdapter<Void>() { |
| 98 | + @Override |
| 99 | + public <S> Void visit(StringValue value, S context) { |
| 100 | + visited.add(value.getValue()); |
| 101 | + return null; |
| 102 | + } |
| 103 | + |
| 104 | + @Override |
| 105 | + public <S> Void visit(Column column, S context) { |
| 106 | + visited.add(column.getColumnName()); |
| 107 | + return null; |
| 108 | + } |
| 109 | + }, null); |
| 110 | + assertEquals(expected, visited); |
| 111 | + } |
| 112 | +} |
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