Add the ASCII function for SQLServer

src/main/java/org/mybatis/dynamic/mysql/MySQLBuilder.java

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+package org.mybatis.dynamic.mysql;
+
+import org.mybatis.dynamic.sql.BindableColumn;
+import org.mybatis.dynamic.mysql.select.function.Ascii;
+
+public interface MySQLBuilder {
+	static Ascii ascii(BindableColumn<String> column) {
+        return Ascii.of(column);
+    }
+}

src/main/java/org/mybatis/dynamic/mysql/select/function/Ascii.java

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+/**
+ *    Copyright 2016-2018 the original author or authors.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+package org.mybatis.dynamic.mysql.select.function;
+
+import org.mybatis.dynamic.sql.BindableColumn;
+import org.mybatis.dynamic.sql.render.TableAliasCalculator;
+import org.mybatis.dynamic.sql.select.function.AbstractFunction;
+
+public class Ascii extends AbstractFunction<String, Ascii> {
+
+    private Ascii(BindableColumn<String> column) {
+        super(column);
+    }
+
+    @Override
+    public String renderWithTableAlias(TableAliasCalculator tableAliasCalculator) {
+        return "ASCII(" //$NON-NLS-1$
+                + column.renderWithTableAlias(tableAliasCalculator)
+                + ")"; //$NON-NLS-1$
+    }
+
+    @Override
+    protected Ascii copy() {
+        return new Ascii(column);
+    }
+
+    public static Ascii of(BindableColumn<String> column) {
+        return new Ascii(column);
+    }
+}

src/main/java/org/mybatis/dynamic/sqlserver/SQLServerBuilder.java

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+package org.mybatis.dynamic.sqlserver;
+
+import org.mybatis.dynamic.sql.BindableColumn;
+import org.mybatis.dynamic.sqlserver.select.function.Ascii;
+
+public interface SQLServerBuilder {
+	static Ascii ascii(BindableColumn<String> column) {
+        return Ascii.of(column);
+    }
+}

src/main/java/org/mybatis/dynamic/sqlserver/select/function/Ascii.java

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+/**
+ *    Copyright 2016-2018 the original author or authors.
+ *
+ *    Licensed under the Apache License, Version 2.0 (the "License");
+ *    you may not use this file except in compliance with the License.
+ *    You may obtain a copy of the License at
+ *
+ *       http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *    Unless required by applicable law or agreed to in writing, software
+ *    distributed under the License is distributed on an "AS IS" BASIS,
+ *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *    See the License for the specific language governing permissions and
+ *    limitations under the License.
+ */
+package org.mybatis.dynamic.sqlserver.select.function;
+
+import org.mybatis.dynamic.sql.BindableColumn;
+import org.mybatis.dynamic.sql.render.TableAliasCalculator;
+import org.mybatis.dynamic.sql.select.function.AbstractFunction;
+
+public class Ascii extends AbstractFunction<String, Ascii> {
+
+    private Ascii(BindableColumn<String> column) {
+        super(column);
+    }
+
+    @Override
+    public String renderWithTableAlias(TableAliasCalculator tableAliasCalculator) {
+        return "ASCII(" //$NON-NLS-1$
+                + column.renderWithTableAlias(tableAliasCalculator)
+                + ")"; //$NON-NLS-1$
+    }
+
+    @Override
+    protected Ascii copy() {
+        return new Ascii(column);
+    }
+
+    public static Ascii of(BindableColumn<String> column) {
+        return new Ascii(column);
+    }
+}

src/test/java/org/mybatis/dynamic/mysql/select/FunctionsTest.java

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+package org.mybatis.dynamic.mysql.select;
+
+import static org.mybatis.dynamic.sql.SqlBuilder.isEqualTo;
+import static org.mybatis.dynamic.sql.SqlBuilder.select;
+import static org.mybatis.dynamic.mysql.MySQLBuilder.ascii;
+
+import java.sql.JDBCType;
+import java.util.Date;
+
+import org.assertj.core.api.SoftAssertions;
+import org.junit.jupiter.api.Test;
+import org.junit.platform.runner.JUnitPlatform;
+import org.junit.runner.RunWith;
+import org.mybatis.dynamic.sql.SqlColumn;
+import org.mybatis.dynamic.sql.SqlTable;
+import org.mybatis.dynamic.sql.render.RenderingStrategy;
+import org.mybatis.dynamic.sql.select.render.SelectStatementProvider;
+
+@RunWith(JUnitPlatform.class)
+public class FunctionsTest {
+
+	public static final SqlTable table = SqlTable.of("foo");
+    public static final SqlColumn<Date> column1 = table.column("column1", JDBCType.DATE);
+    public static final SqlColumn<Integer> column2 = table.column("column2", JDBCType.INTEGER);
+    public static final SqlColumn<String> column3 = table.column("column3", JDBCType.VARCHAR);
+
+    @Test
+    public void testAscii() {
+        SelectStatementProvider selectStatement = select(ascii(column3).as("A_COLUMN3"))
+                .from(table, "a")
+                .where(ascii(column3), isEqualTo("A"))
+                .build()
+                .render(RenderingStrategy.MYBATIS3);
+
+        SoftAssertions.assertSoftly(softly -> {
+            String expectedFullStatement = "select ASCII(a.column3) as A_COLUMN3 "
+                    + "from foo a "
+                    + "where ASCII(a.column3) = #{parameters.p1,jdbcType=VARCHAR}";
+
+            softly.assertThat(selectStatement.getSelectStatement()).isEqualTo(expectedFullStatement);
+        });
+    }
+}

src/test/java/org/mybatis/dynamic/sqlserver/select/FunctionsTest.java

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+package org.mybatis.dynamic.sqlserver.select;
+
+import static org.mybatis.dynamic.sql.SqlBuilder.isEqualTo;
+import static org.mybatis.dynamic.sql.SqlBuilder.select;
+import static org.mybatis.dynamic.sqlserver.SQLServerBuilder.ascii;
+
+import java.sql.JDBCType;
+import java.util.Date;
+
+import org.assertj.core.api.SoftAssertions;
+import org.junit.jupiter.api.Test;
+import org.junit.platform.runner.JUnitPlatform;
+import org.junit.runner.RunWith;
+import org.mybatis.dynamic.sql.SqlColumn;
+import org.mybatis.dynamic.sql.SqlTable;
+import org.mybatis.dynamic.sql.render.RenderingStrategy;
+import org.mybatis.dynamic.sql.select.render.SelectStatementProvider;
+
+@RunWith(JUnitPlatform.class)
+public class FunctionsTest {
+
+	public static final SqlTable table = SqlTable.of("foo");
+    public static final SqlColumn<Date> column1 = table.column("column1", JDBCType.DATE);
+    public static final SqlColumn<Integer> column2 = table.column("column2", JDBCType.INTEGER);
+    public static final SqlColumn<String> column3 = table.column("column3", JDBCType.VARCHAR);
+
+    @Test
+    public void testAscii() {
+        SelectStatementProvider selectStatement = select(ascii(column3).as("A_COLUMN3"))
+                .from(table, "a")
+                .where(ascii(column3), isEqualTo("A"))
+                .build()
+                .render(RenderingStrategy.MYBATIS3);
+
+        SoftAssertions.assertSoftly(softly -> {
+            String expectedFullStatement = "select ASCII(a.column3) as A_COLUMN3 "
+                    + "from foo a "
+                    + "where ASCII(a.column3) = #{parameters.p1,jdbcType=VARCHAR}";
+
+            softly.assertThat(selectStatement.getSelectStatement()).isEqualTo(expectedFullStatement);
+        });
+    }
+}