Update error messages and comments for unsupported operations (#136)

Author: zinal

hibernate-dialect-v5/src/main/java/tech/ydb/hibernate/dialect/YdbDialect.java

@@ -176,7 +176,7 @@ public String getCurrentTimestampSelectString() {
 
     @Override
     public String getForUpdateString() {
-        throw new UnsupportedOperationException("YDB don't support FOR UPDATE statement");
+        throw new UnsupportedOperationException("YDB does not support FOR UPDATE statement");
     }
 
     @Override

hibernate-dialect/src/main/java/tech/ydb/hibernate/dialect/YdbDialect.java

@@ -235,7 +235,7 @@ public String getCurrentTimestampSelectString() {
 
     @Override
     public String getForUpdateString() {
-        throw new UnsupportedOperationException("YDB don't support FOR UPDATE statement");
+        throw new UnsupportedOperationException("YDB does not support FOR UPDATE statement");
     }
 
     @Override

liquibase-dialect/src/main/java/tech/ydb/liquibase/database/YdbDatabase.java

@@ -119,23 +119,23 @@ public boolean supportsTablespaces() {
     }
 
     /**
-     * YDB don't support foreign key
+     * YDB does not support foreign key
      */
     @Override
     public boolean supportsForeignKeyDisable() {
         return true;
     }
 
     /**
-     * YDB don't support sequences
+     * YDB does not support sequences (yet)
      */
     @Override
     public boolean supportsSequences() {
         return false;
     }
 
     /**
-     * YDB don't support auto increment
+     * YDB does not support auto increment (yet)
      */
     @Override
     public boolean supportsAutoIncrement() {

spring-data-dialect/src/main/java/tech/ydb/data/core/dialect/YdbDialect.java

@@ -42,7 +42,7 @@ public Position getClausePosition() {
 
     private static final LockClause LOCK_CLAUSE = new LockClause() {
         public String getLock(LockOptions lockOptions) {
-            throw new UnsupportedOperationException("YDB don't support pessimistic locks");
+            throw new UnsupportedOperationException("YDB does not support pessimistic locks");
         }
 
         public LockClause.Position getClausePosition() {
@@ -76,7 +76,7 @@ public Set<Class<?>> simpleTypes() {
     @Override
     public InsertRenderContext getInsertRenderContext() {
         return () -> {
-            throw new UnsupportedOperationException("YDB don't support VALUES (DEFAULT) statement");
+            throw new UnsupportedOperationException("YDB does not support VALUES (DEFAULT) statement");
         };
     }