Generate alias for SELECT queries only if SQL dialect supports it

plugins/org.jkiss.dbeaver.ext.clickhouse/src/org/jkiss/dbeaver/ext/clickhouse/model/ClickhouseSQLDialect.java

@@ -34,4 +34,9 @@ public class ClickhouseSQLDialect extends GenericSQLDialect {
     public void initDriverSettings(JDBCDataSource dataSource, JDBCDatabaseMetaData metaData) {
         super.initDriverSettings(dataSource, metaData);
     }
+
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
 }

plugins/org.jkiss.dbeaver.ext.db2.i/src/org/jkiss/dbeaver/ext/db2/i/model/DB2ISQLDialect.java

@@ -34,4 +34,9 @@ public class DB2ISQLDialect extends GenericSQLDialect {
     public void initDriverSettings(JDBCDataSource dataSource, JDBCDatabaseMetaData metaData) {
         super.initDriverSettings(dataSource, metaData);
     }
+
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
 }

plugins/org.jkiss.dbeaver.ext.db2.zos/src/org/jkiss/dbeaver/ext/db2/zos/model/DB2ZOSSQLDialect.java

@@ -34,4 +34,9 @@ public class DB2ZOSSQLDialect extends GenericSQLDialect {
     public void initDriverSettings(JDBCDataSource dataSource, JDBCDatabaseMetaData metaData) {
         super.initDriverSettings(dataSource, metaData);
     }
+
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
 }

plugins/org.jkiss.dbeaver.ext.h2gis/src/org/jkiss/dbeaver/ext/h2gis/model/H2GISSQLDialect.java

@@ -40,4 +40,9 @@ public class H2GISSQLDialect extends GenericSQLDialect {
     public void initDriverSettings(JDBCDataSource dataSource, JDBCDatabaseMetaData metaData) {
         super.initDriverSettings(dataSource, metaData);
     }
+
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
 }

plugins/org.jkiss.dbeaver.ext.hana/src/org/jkiss/dbeaver/ext/hana/model/HANASQLDialect.java

@@ -47,6 +47,11 @@ public class HANASQLDialect extends GenericSQLDialect {
                         "REPLACE_REGEXPR"));
     }
 
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
+
     /*
      * expression evaluation
      */

plugins/org.jkiss.dbeaver.ext.hsqldb/src/org/jkiss/dbeaver/ext/hsqldb/model/HSQLDialect.java

@@ -73,4 +73,9 @@ public class HSQLDialect extends GenericSQLDialect {
                 ));
     }
 
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
+
 }

plugins/org.jkiss.dbeaver.ext.teradata/src/org/jkiss/dbeaver/ext/teradata/model/TeradataSQLDialect.java

@@ -36,4 +36,9 @@ public class TeradataSQLDialect extends GenericSQLDialect {
             ));
     }
 
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
+
 }

plugins/org.jkiss.dbeaver.ext.vertica/src/org/jkiss/dbeaver/ext/vertica/model/VerticaSQLDialect.java

@@ -31,6 +31,11 @@ public class VerticaSQLDialect extends GenericSQLDialect {
         super.initDriverSettings(dataSource, metaData);
     }
 
+    @Override
+    public boolean supportsAliasInSelect() {
+        return true;
+    }
+
     public String[][] getIdentifierQuoteStrings() {
         return BasicSQLDialect.DEFAULT_IDENTIFIER_QUOTES;
     }