first commit for openGauss connect odbc code

test/expected/premature.out

@@ -0,0 +1,21 @@
+connected
+
+Preparing an INSERT statement
+# of result cols: 1
+# of result cols: 1
+
+Preparing an insert using a function
+# of result cols: 1
+# of result cols: 1
+
+Preparing a multi-statement
+# of result cols: 3
+# of result cols: 3
+
+Prepare with function, but execute with different param
+# of result cols: 1
+
+Checking table contents. Should contain only one row.
+Result set:
+function insert right
+disconnecting