Skip to content

feat: support distinctrow keyword #2238

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Jun 8, 2025
Merged

feat: support distinctrow keyword #2238

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
1 change: 1 addition & 0 deletions src/main/java/net/sf/jsqlparser/parser/ParserKeywordsUtils.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -63,6 +63,7 @@ public class ParserKeywordsUtils {
{"CURRENT", RESTRICTED_JSQLPARSER},
{"DEFAULT", RESTRICTED_ALIAS},
{"DISTINCT", RESTRICTED_SQL2016},
{"DISTINCTROW", RESTRICTED_SQL2016},
{"DOUBLE", RESTRICTED_ALIAS},
{"ELSE", RESTRICTED_JSQLPARSER},
{"EXCEPT", RESTRICTED_SQL2016},
Expand Down
12 changes: 11 additions & 1 deletion src/main/java/net/sf/jsqlparser/statement/select/Distinct.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -20,6 +20,7 @@ public class Distinct implements Serializable {

private List<SelectItem<?>> onSelectItems;
private boolean useUnique = false;
private boolean useDistinctRow = false;

public Distinct() {}

Expand All @@ -43,9 +44,18 @@ public void setUseUnique(boolean useUnique) {
this.useUnique = useUnique;
}

public boolean isUseDistinctRow() {
Copy link
Contributor Author

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Since DISTINCTROW is a synonym for DISTINCT, I re-used the existing Distinct class and only augmented it with the useDistinctRow attribute to determine the string representation of Distinct.

return useDistinctRow;
}

public void setUseDistinctRow(boolean useDistinctRow) {
this.useDistinctRow = useDistinctRow;
}

@Override
public String toString() {
String sql = useUnique ? "UNIQUE" : "DISTINCT";
String distinctIdentifier = useDistinctRow ? "DISTINCTROW" : "DISTINCT";
String sql = useUnique ? "UNIQUE" : distinctIdentifier;

if (onSelectItems != null && !onSelectItems.isEmpty()) {
sql += " ON (" + PlainSelect.getStringList(onSelectItems) + ")";
Expand Down
2 changes: 2 additions & 0 deletions src/main/java/net/sf/jsqlparser/util/deparser/SelectDeParser.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -397,6 +397,8 @@ protected void deparseDistinctClause(Distinct distinct) {
if (distinct != null) {
if (distinct.isUseUnique()) {
builder.append("UNIQUE ");
} else if (distinct.isUseDistinctRow()) {
builder.append("DISTINCTROW ");
} else {
builder.append("DISTINCT ");
}
Expand Down
5 changes: 4 additions & 1 deletion src/main/jjtree/net/sf/jsqlparser/parser/JSqlParserCC.jjt
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -316,6 +316,7 @@ TOKEN: /* SQL Keywords. prefixed with K_ to avoid name clashes */
| <K_DISCARD : "DISCARD">
| <K_DISCONNECT:"DISCONNECT">
| <K_DISTINCT:"DISTINCT">
| <K_DISTINCTROW:"DISTINCTROW">
| <K_DIV:"DIV">
| <K_DDL:"DDL">
| <K_DML:"DML">
Expand Down Expand Up @@ -3147,7 +3148,9 @@ PlainSelect PlainSelect() #PlainSelect:
[ LOOKAHEAD(2) "ON" "(" distinctOn=SelectItemsList() { plainSelect.getDistinct().setOnSelectItems(distinctOn); } ")" ]
)
|
<K_UNIQUE> { distinct = new Distinct(true); plainSelect.setDistinct(distinct); }
<K_DISTINCTROW> { distinct = new Distinct(); distinct.setUseDistinctRow(true); plainSelect.setDistinct(distinct); }
|
<K_UNIQUE> { distinct = new Distinct(true); plainSelect.setDistinct(distinct); }
|
<K_SQL_CALC_FOUND_ROWS> { plainSelect.setMySqlSqlCalcFoundRows(true); }
|
Expand Down
2 changes: 2 additions & 0 deletions src/site/sphinx/keywords.rst
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,8 @@ The following Keywords are **restricted** in JSQLParser-|JSQLPARSER_VERSION| and
+----------------------+-------------+-----------+
| DISTINCT | Yes | Yes |
+----------------------+-------------+-----------+
| DISTINCTROW | Yes | Yes |
+----------------------+-------------+-----------+
| DOUBLE | Yes | |
+----------------------+-------------+-----------+
| ELSE | Yes | Yes |
Expand Down
21 changes: 21 additions & 0 deletions src/test/java/net/sf/jsqlparser/statement/select/SelectTest.java
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1058,6 +1058,27 @@ public void testDistinct() throws JSQLParserException {
.getExpression()).getColumnName());
}

@Test
public void testDistinctRow() throws JSQLParserException {
String statement =
"SELECT DISTINCTROW col1, col2 FROM mytable WHERE mytable.col = 9";
Select select = (Select) TestUtils.assertSqlCanBeParsedAndDeparsed(statement, true);

assertInstanceOf(PlainSelect.class, select);

PlainSelect plainSelect = (PlainSelect) select;
Distinct distinct = plainSelect.getDistinct();

assertNotNull(distinct);
assertTrue(distinct.isUseDistinctRow());
assertNull(distinct.getOnSelectItems());

assertEquals("col1", ((Column) (plainSelect.getSelectItems().get(0))
.getExpression()).getColumnName());
assertEquals("col2", ((Column) (plainSelect.getSelectItems().get(1))
.getExpression()).getColumnName());
}

@Test
public void testIsDistinctFrom() throws JSQLParserException {
String stmt = "SELECT name FROM tbl WHERE name IS DISTINCT FROM foo";
Expand Down
Loading