#87: Added BigDecimal literal (#88)

## Features / Enhancements
 
* #87: Added BigDecimal literal

doc/changes/changelog.md

@@ -1,3 +1,4 @@
 # Changes
 
+* [4.1.0](changes-4.1.0.md)
 * [4.0.0](changes-4.0.0.md)

doc/changes/changes-4.1.0.md

@@ -0,0 +1,5 @@
+# SQL Statement Builder 4.1.0, released 2020-08-11
+
+## Features / Enhancements
+
+* #87: Added BigDecimal literal

doc/design.md

@@ -48,13 +48,13 @@ Needs: impl, utest
 Tags: Select Statement Builder
 
 ### Using Literal Values
-`dsn~literal-values~1`
+`dsn~literal-values~2`
 
 Forwarded from requirements.
 
 Covers:
 
-* `req~literal-values~1`
+* `req~literal-values~2`
 
 Needs: impl, utest
 

doc/system_requirements.md

@@ -188,9 +188,9 @@ Covers:
 Needs: dsn
 
 #### Literal Values
-`req~literal-values~1`
+`req~literal-values~2`
 
-ESB supports the following literal values: `default`, `double`, `float`, `integer`, `long`, `null`, `string`.
+ESB supports the following literal values: `default`, `double`, `float`, `integer`, `long`, `null`, `string`, `BigDecimal`.
 
 Covers:
 

pom.xml

@@ -4,7 +4,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.exasol</groupId>
     <artifactId>sql-statement-builder</artifactId>
-    <version>4.0.0</version>
+    <version>4.1.0</version>
     <name>Exasol SQL Statement Builder</name>
     <description>This module provides a Builder for SQL statements that helps creating the correct structure and
         validates variable parts of the statements.

src/main/java/com/exasol/sql/expression/BigDecimalLiteral.java

@@ -0,0 +1,44 @@
+package com.exasol.sql.expression;
+
+import java.math.BigDecimal;
+
+/**
+ * This class represents BigDecimal literals.
+ */
+// [impl->dsn~literal-values~2]
+public class BigDecimalLiteral extends AbstractValueExpression {
+    private final BigDecimal literal;
+
+    private BigDecimalLiteral(BigDecimal literal) {
+        this.literal = literal;
+    }
+
+    /**
+     * Create a new {@link BigDecimalLiteral} from a BigDecimal.
+     *
+     * @param literal content
+     * @return new {@link StringLiteral}
+     */
+    public static BigDecimalLiteral of(BigDecimal literal) {
+        return new BigDecimalLiteral(literal);
+    }
+
+    /**
+     * Get the value of the {@link BigDecimalLiteral}.
+     *
+     * @return BigDecimal value
+     */
+    public BigDecimal getValue() {
+        return literal;
+    }
+
+    @Override
+    public void accept(ValueExpressionVisitor visitor) {
+        visitor.visit(this);
+    }
+
+    @Override
+    public String toString() {
+        return literal.toString();
+    }
+}

src/main/java/com/exasol/sql/expression/DefaultValue.java

@@ -7,7 +7,7 @@
  * This is for example used in updates embedded into {@code MERGE} statements.
  * </p>
  */
-// [impl->dsn~literal-values~1]
+// [impl->dsn~literal-values~2]
 public final class DefaultValue extends AbstractValueExpression {
     private static final DefaultValue instance = new DefaultValue();
 

src/main/java/com/exasol/sql/expression/DoubleLiteral.java

@@ -3,7 +3,7 @@
 /**
  * This class represents double literals.
  */
-// [impl->dsn~literal-values~1]
+// [impl->dsn~literal-values~2]
 public class DoubleLiteral extends AbstractValueExpression {
     private final double value;
 

src/main/java/com/exasol/sql/expression/FloatLiteral.java

@@ -3,7 +3,7 @@
 /**
  * This class represents float literals.
  */
-// [impl->dsn~literal-values~1]
+// [impl->dsn~literal-values~2]
 public class FloatLiteral extends AbstractValueExpression {
     private final float value;
 

src/main/java/com/exasol/sql/expression/IntegerLiteral.java

@@ -3,7 +3,7 @@
 /**
  * This class represents integer literals.
  */
-// [impl->dsn~literal-values~1]
+// [impl->dsn~literal-values~2]
 public final class IntegerLiteral extends AbstractValueExpression {
     private final int value;
 

src/main/java/com/exasol/sql/expression/LongLiteral.java

@@ -3,7 +3,7 @@
 /**
  * This class represents long literals.
  */
-// [impl->dsn~literal-values~1]
+// [impl->dsn~literal-values~2]
 public class LongLiteral extends AbstractValueExpression {
     private final long value;
 

src/main/java/com/exasol/sql/expression/NullLiteral.java

@@ -3,7 +3,7 @@
 /**
  * This class represents a null literal.
  */
-// [impl->dsn~literal-values~1]
+// [impl->dsn~literal-values~2]
 public final class NullLiteral extends AbstractValueExpression {
     private static final NullLiteral instance = new NullLiteral();
 

src/main/java/com/exasol/sql/expression/StringLiteral.java

@@ -3,7 +3,7 @@
 /**
  * This class represents string literals (or character literals in SQL terms).
  */
-// [impl->dsn~literal-values~1]
+// [impl->dsn~literal-values~2]
 public final class StringLiteral extends AbstractValueExpression {
     private final String literal;
 

src/main/java/com/exasol/sql/expression/ValueExpressionVisitor.java

@@ -20,6 +20,8 @@ public interface ValueExpressionVisitor {
 
     public void visit(FloatLiteral literal);
 
+    public void visit(BigDecimalLiteral literal);
+
     public void visit(BooleanLiteral literal);
 
     public void visit(ColumnReference columnReference);

src/main/java/com/exasol/sql/expression/rendering/ValueExpressionRenderer.java

@@ -54,6 +54,13 @@ public void visit(final FloatLiteral literal) {
         setLastVisited(literal);
     }
 
+    @Override
+    public void visit(BigDecimalLiteral literal) {
+        appendCommaWhenNeeded(literal);
+        append(literal.toString());
+        setLastVisited(literal);
+    }
+
     @Override
     public void visit(final BooleanLiteral literal) {
         appendCommaWhenNeeded(literal);

src/test/java/com/exasol/sql/expression/DoubleLiteralTest.java

@@ -5,7 +5,7 @@
 
 import org.junit.jupiter.api.Test;
 
-// [utest->dsn~literal-values~1]
+// [utest->dsn~literal-values~2]
 class DoubleLiteralTest {
     @Test
     void testGetValue() {

src/test/java/com/exasol/sql/expression/FloatLiteralTest.java

@@ -5,7 +5,7 @@
 
 import org.junit.jupiter.api.Test;
 
-// [utest->dsn~literal-values~1]
+// [utest->dsn~literal-values~2]
 class FloatLiteralTest {
     @Test
     void testGetValue() {

src/test/java/com/exasol/sql/expression/LongLiteralTest.java

@@ -5,7 +5,7 @@
 
 import org.junit.jupiter.api.Test;
 
-// [utest->dsn~literal-values~1]
+// [utest->dsn~literal-values~2]
 class LongLiteralTest {
     @Test
     void testGetValue() {

src/test/java/com/exasol/sql/expression/TestBigDecimalLiteral.java

@@ -0,0 +1,21 @@
+package com.exasol.sql.expression;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.equalTo;
+
+import java.math.BigDecimal;
+
+import org.junit.jupiter.api.Test;
+
+// [utest->dsn~literal-values~2]
+class TestBigDecimalLiteral {
+    @Test
+    void testGetValue() {
+        assertThat(BigDecimalLiteral.of(BigDecimal.TEN).getValue(), equalTo(BigDecimal.TEN));
+    }
+
+    @Test
+    void testGetToString() {
+        assertThat(BigDecimalLiteral.of(BigDecimal.valueOf(123)).toString(), equalTo("123"));
+    }
+}

src/test/java/com/exasol/sql/expression/TestIntegerLiteral.java

@@ -5,7 +5,7 @@
 
 import org.junit.jupiter.api.Test;
 
-// [utest->dsn~literal-values~1]
+// [utest->dsn~literal-values~2]
 class TestIntegerLiteral {
     @Test
     void testGetValue() {

src/test/java/com/exasol/sql/expression/TestStringLiteral.java

@@ -5,7 +5,7 @@
 
 import org.junit.jupiter.api.Test;
 
-// [utest->dsn~literal-values~1]
+// [utest->dsn~literal-values~2]
 class TestStringLiteral {
     @Test
     void testGetToString() {

src/test/java/com/exasol/sql/expression/rendering/TestBooleanExpressionRenderer.java

@@ -7,8 +7,11 @@
 import static org.hamcrest.MatcherAssert.assertThat;
 import static org.junit.jupiter.api.Assertions.assertAll;
 
+import java.math.BigDecimal;
+
 import org.junit.jupiter.api.Test;
 
+import com.exasol.sql.expression.BigDecimalLiteral;
 import com.exasol.sql.expression.BooleanExpression;
 import com.exasol.sql.expression.ComparisonOperator;
 import com.exasol.sql.rendering.StringRendererConfig;
@@ -210,4 +213,12 @@ void testComparisonOperatorsWithColumnReference() {
                         rendersTo("t.city >= t.machi")) //
         );
     }
+
+    //// [utest->dsn~literal-values~2]
+    @Test
+    void testBigDecimalLiteralComparison() {
+        final BooleanExpression expression = eq(BigDecimalLiteral.of(BigDecimal.TEN),
+                BigDecimalLiteral.of(BigDecimal.valueOf(10.2)));
+        assertThat(expression, rendersTo("10 = 10.2"));
+    }
 }