Replace old PostODBC driver with new one...

This one is based on an older PostODBC driver, rewritten and maintained by
InsightDist(?)

src/interfaces/odbc/statement.h

@@ -0,0 +1,119 @@
+
+/* File:            statement.h
+ *
+ * Description:     See "statement.c"
+ *
+ * Comments:        See "notice.txt" for copyright and license information.
+ *
+ */
+
+#ifndef __STATEMENT_H__
+#define __STATEMENT_H__
+
+#include <windows.h>
+#include <sql.h>
+#include "psqlodbc.h"
+
+typedef enum {
+    STMT_ALLOCATED,     /* The statement handle is allocated, but not used so far */
+    STMT_READY,         /* the statement is waiting to be executed */
+    STMT_PREMATURE,     /* ODBC states that it is legal to call e.g. SQLDescribeCol before
+                           a call to SQLExecute, but after SQLPrepare. To get all the necessary
+                           information in such a case, we simply execute the query _before_ the
+                           actual call to SQLExecute, so that statement is considered to be "premature".
+                        */   
+    STMT_FINISHED,      /* statement execution has finished */
+    STMT_EXECUTING      /* statement execution is still going on */
+} STMT_Status;
+
+#define STMT_TRUNCATED -2
+#define STMT_INFO_ONLY -1 /* not an error message, just a notification to be returned by SQLError */
+#define STMT_OK 0 /* will be interpreted as "no error pending" */
+#define STMT_EXEC_ERROR 1
+#define STMT_STATUS_ERROR 2
+#define STMT_SEQUENCE_ERROR 3
+#define STMT_NO_MEMORY_ERROR 4
+#define STMT_COLNUM_ERROR 5
+#define STMT_NO_STMTSTRING 6
+#define STMT_ERROR_TAKEN_FROM_BACKEND 7
+#define STMT_INTERNAL_ERROR 8
+#define STMT_STILL_EXECUTING 9
+#define STMT_NOT_IMPLEMENTED_ERROR 10
+#define STMT_BAD_PARAMETER_NUMBER_ERROR 11
+#define STMT_OPTION_OUT_OF_RANGE_ERROR 12
+#define STMT_INVALID_COLUMN_NUMBER_ERROR 13
+#define STMT_RESTRICTED_DATA_TYPE_ERROR 14
+#define STMT_INVALID_CURSOR_STATE_ERROR 15
+#define STMT_OPTION_VALUE_CHANGED 16
+
+
+/* statement types */
+#define STMT_TYPE_SELECT     0
+#define STMT_TYPE_INSERT     1
+#define STMT_TYPE_UPDATE     2
+#define STMT_TYPE_DELETE     3
+#define STMT_TYPE_OTHER      4
+#define STMT_TYPE_UNKNOWN  666  // 'unknown' means we don't have the statement yet,
+                                // or haven't looked at it to see what type it is.
+                                // 'other' means we looked, but couldn't tell.
+
+
+/********	Statement Handle	***********/
+struct StatementClass_ {
+    ConnectionClass *hdbc;		/* pointer to ConnectionClass this statement belongs to */
+
+    QResultClass *result;		/* result of the current statement */
+
+    STMT_Status status;
+    char *errormsg;
+    int errornumber;
+	int maxRows;
+
+    /* information on bindings */
+    BindInfoClass *bindings;	/* array to store the binding information */
+    int bindings_allocated;
+
+    /* information on statement parameters */
+    int parameters_allocated;
+    ParameterInfoClass *parameters;
+
+	Int4 currTuple;
+
+    char *statement;			/* if non--null pointer to the SQL statement that has been executed */
+
+    int statement_type;			/* According to the defines above */
+	int data_at_exec;			/* Number of params needing SQLPutData */
+	int current_exec_param;		/* The current parameter for SQLPutData */
+
+	char put_data;				/* Has SQLPutData been called yet? */
+
+	char errormsg_created;		/* has an informative error msg been created?  */
+	char manual_result;			/* Is the statement result manually built? */
+	char prepare;				/* is this statement a prepared statement or direct */
+
+	char stmt_with_params[65536 /* MAX_STATEMENT_LEN */];		/* statement after parameter substitution */
+
+};
+
+#define SC_get_conn(a)    (a->hdbc)
+#define SC_get_Result(a)  (a->result);
+
+/*	options for SC_free_params() */
+#define STMT_FREE_PARAMS_ALL				0
+#define STMT_FREE_PARAMS_DATA_AT_EXEC_ONLY	1
+
+/*	Statement prototypes */
+StatementClass *SC_Constructor();
+char SC_Destructor(StatementClass *self);
+int statement_type(char *statement);
+void SC_pre_execute(StatementClass *self);
+char SC_unbind_cols(StatementClass *self);
+char SC_recycle_statement(StatementClass *self);
+
+void SC_clear_error(StatementClass *self);
+char SC_get_error(StatementClass *self, int *number, char **message);
+char *SC_create_errormsg(StatementClass *self);
+RETCODE SC_execute(StatementClass *stmt);
+void SC_free_params(StatementClass *self, char option);
+
+#endif