Adds support for the interval type

CHANGELOG.md

@@ -23,6 +23,27 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 Thank you to all who have contributed!
 -->
 
+## [Unreleased](https://TODO.com) - YYYY-MM-DD
+
+### Added
+- Added parsing, planning, and execution of the interval type and interval values.
+- Added multiple operations involving datetime and interval values.
+
+### Changed
+
+### Deprecated
+
+### Fixed
+
+### Removed
+
+### Security
+
+### Contributors
+
+Thank you to all who have contributed!
+- @johnedquinn
+
 ## [1.1.0](https://github.com/partiql/partiql-lang-kotlin/releases/tag/v1.1.0) - 2025-02-14
 
 ### Added

gradle.properties

@@ -1,5 +1,5 @@
 group=org.partiql
-version=1.1.0
+version=1.2.0-SNAPSHOT
 
 ossrhUsername=EMPTY
 ossrhPassword=EMPTY

partiql-ast/api/partiql-ast.api

@@ -544,6 +544,9 @@ public abstract class org/partiql/ast/AstVisitor {
 	public fun visitInsertSource (Lorg/partiql/ast/dml/InsertSource;Ljava/lang/Object;)Ljava/lang/Object;
 	public fun visitInsertSourceFromDefault (Lorg/partiql/ast/dml/InsertSource$FromDefault;Ljava/lang/Object;)Ljava/lang/Object;
 	public fun visitInsertSourceFromExpr (Lorg/partiql/ast/dml/InsertSource$FromExpr;Ljava/lang/Object;)Ljava/lang/Object;
+	public fun visitIntervalQualifier (Lorg/partiql/ast/IntervalQualifier;Ljava/lang/Object;)Ljava/lang/Object;
+	public fun visitIntervalQualifierRange (Lorg/partiql/ast/IntervalQualifier$Range;Ljava/lang/Object;)Ljava/lang/Object;
+	public fun visitIntervalQualifierSingle (Lorg/partiql/ast/IntervalQualifier$Single;Ljava/lang/Object;)Ljava/lang/Object;
 	public fun visitKeyValue (Lorg/partiql/ast/ddl/KeyValue;Ljava/lang/Object;)Ljava/lang/Object;
 	public fun visitLet (Lorg/partiql/ast/Let;Ljava/lang/Object;)Ljava/lang/Object;
 	public fun visitLetBinding (Lorg/partiql/ast/Let$Binding;Ljava/lang/Object;)Ljava/lang/Object;
@@ -678,6 +681,7 @@ public final class org/partiql/ast/DataType : org/partiql/ast/AstEnum {
 	public static fun INTEGER4 ()Lorg/partiql/ast/DataType;
 	public static fun INTEGER8 ()Lorg/partiql/ast/DataType;
 	public static fun INTERVAL ()Lorg/partiql/ast/DataType;
+	public static fun INTERVAL (Lorg/partiql/ast/IntervalQualifier;)Lorg/partiql/ast/DataType;
 	public static fun LIST ()Lorg/partiql/ast/DataType;
 	public static fun NUMERIC ()Lorg/partiql/ast/DataType;
 	public static fun NUMERIC (I)Lorg/partiql/ast/DataType;
@@ -711,6 +715,7 @@ public final class org/partiql/ast/DataType : org/partiql/ast/AstEnum {
 	public fun getChildren ()Ljava/util/List;
 	public fun getElementType ()Lorg/partiql/ast/DataType;
 	public fun getFields ()Ljava/util/List;
+	public fun getIntervalQualifier ()Lorg/partiql/ast/IntervalQualifier;
 	public fun getLength ()Ljava/lang/Integer;
 	public fun getName ()Lorg/partiql/ast/Identifier;
 	public fun getPrecision ()Ljava/lang/Integer;
@@ -1061,6 +1066,52 @@ public class org/partiql/ast/Identifier$Simple$Builder {
 	public fun toString ()Ljava/lang/String;
 }
 
+public abstract class org/partiql/ast/IntervalQualifier : org/partiql/ast/AstNode {
+	public fun <init> ()V
+}
+
+public final class org/partiql/ast/IntervalQualifier$Range : org/partiql/ast/IntervalQualifier {
+	public fun <init> (Lorg/partiql/ast/DatetimeField;Ljava/lang/Integer;Lorg/partiql/ast/DatetimeField;Ljava/lang/Integer;)V
+	public fun accept (Lorg/partiql/ast/AstVisitor;Ljava/lang/Object;)Ljava/lang/Object;
+	public static fun builder ()Lorg/partiql/ast/IntervalQualifier$Range$Builder;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getChildren ()Ljava/util/List;
+	public fun getEndField ()Lorg/partiql/ast/DatetimeField;
+	public fun getEndFieldFractionalPrecision ()Ljava/lang/Integer;
+	public fun getStartField ()Lorg/partiql/ast/DatetimeField;
+	public fun getStartFieldPrecision ()Ljava/lang/Integer;
+	public fun hashCode ()I
+}
+
+public class org/partiql/ast/IntervalQualifier$Range$Builder {
+	public fun build ()Lorg/partiql/ast/IntervalQualifier$Range;
+	public fun endField (Lorg/partiql/ast/DatetimeField;)Lorg/partiql/ast/IntervalQualifier$Range$Builder;
+	public fun endFieldFractionalPrecision (Ljava/lang/Integer;)Lorg/partiql/ast/IntervalQualifier$Range$Builder;
+	public fun leadingFieldPrecision (Ljava/lang/Integer;)Lorg/partiql/ast/IntervalQualifier$Range$Builder;
+	public fun startField (Lorg/partiql/ast/DatetimeField;)Lorg/partiql/ast/IntervalQualifier$Range$Builder;
+	public fun toString ()Ljava/lang/String;
+}
+
+public final class org/partiql/ast/IntervalQualifier$Single : org/partiql/ast/IntervalQualifier {
+	public fun <init> (Lorg/partiql/ast/DatetimeField;Ljava/lang/Integer;Ljava/lang/Integer;)V
+	public fun accept (Lorg/partiql/ast/AstVisitor;Ljava/lang/Object;)Ljava/lang/Object;
+	public static fun builder ()Lorg/partiql/ast/IntervalQualifier$Single$Builder;
+	public fun equals (Ljava/lang/Object;)Z
+	public fun getChildren ()Ljava/util/List;
+	public fun getField ()Lorg/partiql/ast/DatetimeField;
+	public fun getFractionalPrecision ()Ljava/lang/Integer;
+	public fun getPrecision ()Ljava/lang/Integer;
+	public fun hashCode ()I
+}
+
+public class org/partiql/ast/IntervalQualifier$Single$Builder {
+	public fun build ()Lorg/partiql/ast/IntervalQualifier$Single;
+	public fun field (Lorg/partiql/ast/DatetimeField;)Lorg/partiql/ast/IntervalQualifier$Single$Builder;
+	public fun fractionalPrecision (Ljava/lang/Integer;)Lorg/partiql/ast/IntervalQualifier$Single$Builder;
+	public fun precision (Ljava/lang/Integer;)Lorg/partiql/ast/IntervalQualifier$Single$Builder;
+	public fun toString ()Ljava/lang/String;
+}
+
 public final class org/partiql/ast/JoinType : org/partiql/ast/AstEnum {
 	public static final field CROSS I
 	public static final field FULL I

partiql-ast/src/main/java/org/partiql/ast/AstVisitor.java

@@ -423,6 +423,18 @@ public R visitLiteral(Literal node, C ctx) {
         return defaultVisit(node, ctx);
     }
 
+    public R visitIntervalQualifier(IntervalQualifier node, C ctx) {
+        return node.accept(this, ctx);
+    }
+
+    public R visitIntervalQualifierRange(IntervalQualifier.Range node, C ctx) {
+        return defaultVisit(node, ctx);
+    }
+
+    public R visitIntervalQualifierSingle(IntervalQualifier.Single node, C ctx) {
+        return defaultVisit(node, ctx);
+    }
+
     public R visitQueryBody(QueryBody node, C ctx) {
         return node.accept(this, ctx);
     }

partiql-ast/src/main/java/org/partiql/ast/DataType.java

@@ -427,10 +427,25 @@ public static DataType TIMESTAMP_WITH_TIME_ZONE(int precision) {
         return new DataType(TIMESTAMP_WITH_TIME_ZONE, precision, null, null);
     }
 
+    /**
+     * Returns a data type with code {@link #INTERVAL}, however, the interval qualifier is null.
+     * @deprecated Use {@link #INTERVAL(IntervalQualifier)} instead.
+     * @return a data type with code {@link #INTERVAL}, however, the interval qualifier is null.
+     */
+    @Deprecated
     public static DataType INTERVAL() {
         return new DataType(INTERVAL);
     }
 
+    /**
+     * Returns a data type with code {@link #INTERVAL} and the specified interval qualifier.
+     * @param qualifier The interval qualifier.
+     * @return a data type with code {@link #INTERVAL} and the specified interval qualifier.
+     */
+    public static DataType INTERVAL(@NotNull IntervalQualifier qualifier) {
+        return new DataType(qualifier);
+    }
+
     public static DataType USER_DEFINED() {
         return new DataType(USER_DEFINED);
     }
@@ -455,6 +470,7 @@ public static DataType STRUCT(List<StructField> fields) {
     private final DataType elementType;
     private final List<StructField> fields;
     private final Identifier name;
+    private final IntervalQualifier intervalQualifier;
 
     // Private constructor for no parameter DataTypes
     private DataType(int code) {
@@ -465,6 +481,46 @@ private DataType(int code) {
         this.elementType = null;
         this.fields = null;
         this.name = null;
+        this.intervalQualifier = null;
+    }
+
+    /**
+     * Creates a data type with code {@link #INTERVAL} and the specified interval qualifier.
+     * @param intervalQualifier the interval qualifier.
+     */
+    private DataType(IntervalQualifier intervalQualifier) {
+        this(INTERVAL, null, null, null, null, null, null, intervalQualifier);
+    }
+
+    /**
+     * The constructor for DataTypes with all parameters.
+     * @param code the code of the data type
+     * @param precision the precision of the data type
+     * @param scale the scale of the data type
+     * @param length the length of the data type
+     * @param elementType the element type of the data type
+     * @param fields the fields of the data type
+     * @param name the name of the data type
+     * @param intervalQualifier the interval qualifier of the data type
+     */
+    private DataType(
+            int code,
+            Integer precision,
+            Integer scale,
+            Integer length,
+            DataType elementType,
+            List<StructField> fields,
+            Identifier name,
+            IntervalQualifier intervalQualifier
+    ) {
+        this.code = code;
+        this.precision = precision;
+        this.scale = scale;
+        this.length = length;
+        this.elementType = elementType;
+        this.fields = fields;
+        this.name = name;
+        this.intervalQualifier = intervalQualifier;
     }
 
     // Private constructor for DataTypes with Integer parameters; set `name` to null
@@ -476,6 +532,7 @@ private DataType(int code, Integer precision, Integer scale, Integer length) {
         this.elementType = null;
         this.fields = null;
         this.name = null;
+        this.intervalQualifier = null;
     }
 
     // Private constructor for DataTypes with elementType parameter; set `name` to null
@@ -487,6 +544,7 @@ private DataType(int code, DataType elementType) {
         this.elementType = elementType;
         this.fields = null;
         this.name = null;
+        this.intervalQualifier = null;
     }
 
     private DataType(int code, List<StructField> fields) {
@@ -497,6 +555,7 @@ private DataType(int code, List<StructField> fields) {
         this.elementType = null;
         this.fields = fields;
         this.name = null;
+        this.intervalQualifier = null;
     }
 
     // Private constructor for user-defined type w/ an `IdentifierChain` `name`; other parameters set to null
@@ -508,6 +567,7 @@ private DataType(int code, Identifier name) {
         this.length = null;
         this.elementType = null;
         this.fields = null;
+        this.intervalQualifier = null;
     }
 
     @Override
@@ -718,6 +778,15 @@ public List<StructField> getFields() {
         return fields;
     }
 
+    /**
+     * Returns the interval qualifier of this data type. If there is no interval qualifier, null is returned.
+     * @return the interval qualifier of this data type. If there is no interval qualifier, null is returned.
+     */
+    @Nullable
+    public IntervalQualifier getIntervalQualifier() {
+        return intervalQualifier;
+    }
+
     @NotNull
     @Override
     public List<AstNode> getChildren() {