Fix MDEV-12973: Blank columns querying SQL Server

Added support of NCHAR, NVARCHAR an ROWID JDBC types.
  modified:   storage/connect/jdbconn.cpp

Author: Buggynours

storage/connect/jdbconn.cpp

@@ -120,42 +120,47 @@ int TranslateJDBCType(int stp, char *tn, int prec, int& len, char& v)
 	int type;
 
 	switch (stp) {
-	case -1:  // LONGVARCHAR
+	case -1:   // LONGVARCHAR
+	case -16:  // LONGNVARCHAR	(unicode)
 		if (GetTypeConv() != TPC_YES)
 			return TYPE_ERROR;
 		else
 		  len = MY_MIN(abs(len), GetConvSize());
-	case 12:  // VARCHAR
+	case 12:   // VARCHAR
+	case -9:   // NVARCHAR	(unicode)
 		v = 'V';
-	case 1:   // CHAR
+	case 1:    // CHAR
+	case -15:  // NCHAR	 (unicode)
+	case -8:   // ROWID
 		type = TYPE_STRING;
 		break;
-	case 2:   // NUMERIC
-	case 3:   // DECIMAL
-	case -3:  // VARBINARY
+	case 2:    // NUMERIC
+	case 3:    // DECIMAL
+	case -3:   // VARBINARY
 		type = TYPE_DECIM;
 		break;
-	case 4:   // INTEGER
+	case 4:    // INTEGER
 		type = TYPE_INT;
 		break;
-	case 5:   // SMALLINT
+	case 5:    // SMALLINT
 		type = TYPE_SHORT;
 		break;
-	case -6:  // TINYINT
-	case -7:  // BIT
+	case -6:   // TINYINT
+	case -7:   // BIT
+	case 16:   // BOOLEAN
 		type = TYPE_TINY;
 		break;
-	case 6:   // FLOAT
-	case 7:   // REAL
-	case 8:   // DOUBLE
+	case 6:    // FLOAT
+	case 7:    // REAL
+	case 8:    // DOUBLE
 		type = TYPE_DOUBLE;
 		break;
-	case 93:  // TIMESTAMP, DATETIME
+	case 93:   // TIMESTAMP, DATETIME
 		type = TYPE_DATE;
 		len = 19 + ((prec) ? (prec+1) : 0);
 		v = (tn && toupper(tn[0]) == 'T') ? 'S' : 'E';
 		break;
-	case 91:  // DATE, YEAR
+	case 91:   // DATE, YEAR
 		type = TYPE_DATE;
 
 		if (!tn || toupper(tn[0]) != 'Y') {
@@ -167,17 +172,27 @@ int TranslateJDBCType(int stp, char *tn, int prec, int& len, char& v)
 		}	// endif len
 
 		break;
-	case 92:  // TIME
+	case 92:   // TIME
 		type = TYPE_DATE;
 		len = 8 + ((prec) ? (prec+1) : 0);
 		v = 'T';
 		break;
-	case -5:  // BIGINT
+	case -5:   // BIGINT
 		type = TYPE_BIGINT;
 		break;
-	case 0:   // NULL
-	case -2:  // BINARY
-	case -4:  // LONGVARBINARY
+	case 0:    // NULL
+	case -2:   // BINARY
+	case -4:   // LONGVARBINARY
+	case 70:   // DATALINK
+	case 2000: // JAVA_OBJECT
+	case 2001: // DISTINCT
+	case 2002: // STRUCT
+	case 2003: // ARRAY
+	case 2004: // BLOB
+	case 2005: // CLOB
+	case 2006: // REF
+	case 2009: // SQLXML
+	case 2011: // NCLOB
 	default:
 		type = TYPE_ERROR;
 		len = 0;
@@ -1225,9 +1240,12 @@ void JDBConn::SetColumnValue(int rank, PSZ name, PVAL val)
 
 	switch (ctyp) {
 	case 12:          // VARCHAR
+	case -9:          // NVARCHAR
 	case -1:          // LONGVARCHAR
 	case 1:           // CHAR
-  case 3:           // DECIMAL
+	case -15:         // NCHAR
+	case 3:           // DECIMAL
+	case -8:          // ROWID
 		if (jb && ctyp != 3)
 			cn = (jstring)jb;
 		else if (!gmID(g, chrfldid, "StringField", "(ILjava/lang/String;)Ljava/lang/String;"))
@@ -1245,6 +1263,7 @@ void JDBConn::SetColumnValue(int rank, PSZ name, PVAL val)
 	case 4:           // INTEGER
 	case 5:           // SMALLINT
 	case -6:          // TINYINT
+	case 16:          // BOOLEAN
 	case -7:          // BIT
 		if (!gmID(g, intfldid, "IntField", "(ILjava/lang/String;)I"))
 			val->SetValue((int)env->CallIntMethod(job, intfldid, rank, jn));