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// Copyright (c) 1999-2001 David Muse
// See the file COPYING for more information.
#ifndef SQLRCLIENT_H
#define SQLRCLIENT_H
#include <sqlrelay/private/sqlrincludes.h>
class sqlrconnection : public clientsocket {
public:
sqlrconnection(char *server, int port, char *socket,
char *user, char *password,
int retrytime, int tries);
// Initiates a connection to "server" on "port"
// or to the unix "socket" on the local machine
// and authenticates with "user" and "password".
// Failed connections will be retried for
// "tries" times on interval "retrytime"
// or on for a default number of times on
// a default interval if left unspecified.
// If the "socket" parameter is neither
// NULL nor "" then an attempt will be made to
// connect through it before attempting to
// connect to "server" on "port". If it is
// NULL or "" then no attempt will be made to
// connect through the socket.
~sqlrconnection();
// Disconnects and ends the session if
// it hasn't been ended already.
int endSession();
// Ends the session.
int suspendSession();
// Disconnects this connection from the current
// session but leaves the session open so
// that another connection can connect to it
// using resumeSession().
int getConnectionPort();
// Returns the inet port that the connection is
// communicating over. This parameter may be
// passed to another connection for use in
// the resumeSession() method.
char *getConnectionSocket();
// Returns the unix socket that the connection
// is communicating over. This parameter may be
// passed to another connection for use in
// the resumeSession() method.
int resumeSession(int port, char *socket);
// Resumes a session previously left open
// using suspendSession().
// Returns 1 on success and 0 on failure.
int ping();
// Returns 1 if the database is up and 0
// if it's down.
char *identify();
// Returns the type of database:
// oracle7, oracle8, postgresql, mysql, etc.
int autoCommitOn();
// Instructs the database to perform a commit
// after every successful query.
int autoCommitOff();
// Instructs the database to wait for the
// client to tell it when to commit.
int commit();
// Issues a commit. Returns 1 if the commit
// succeeded, 0 if it failed and -1 if an
// error occurred.
int rollback();
// Issues a rollback. Returns 1 if the rollback
// succeeded, 0 if it failed and -1 if an
// error occurred.
void debugOn();
// Causes verbose debugging information to be
// sent to standard output. Another way to do
// this is to start a query with "-- debug\n".
void debugOff();
// Turns debugging off.
int getDebug();
// Returns 0 if debugging is off and 1 if
// debugging is on.
void debugPrintFunction(int (*printfunction)
(const char *,...));
// Allows you to replace the function used
// to print debug messages with your own
// function. The function is expected to take
// arguments like printf().
#include <sqlrelay/private/sqlrconnection.h>
};
class sqlrcursor {
public:
sqlrcursor(sqlrconnection *sqlrc);
~sqlrcursor();
void setResultSetBufferSize(int rows);
// Sets the number of rows of the result set
// to buffer at a time. 0 (the default)
// means buffer the entire result set.
int getResultSetBufferSize();
// Returns the number of result set rows that
// will be buffered at a time or 0 for the
// entire result set.
void dontGetColumnInfo();
// Tells the server not to send any column
// info (names, types, sizes). If you don't
// need that info, you should call this
// method to improve performance.
void getColumnInfo();
// Tells the server to send column info.
void cacheToFile(char *filename);
// Sets query caching on. Future queries
// will be cached to the file "filename".
//
// A default time-to-live of 10 minutes is
// also set.
//
// Note that once cacheToFile() is called,
// the result sets of all future queries will
// be cached to that file until another call
// to cacheToFile() changes which file to
// cache to or a call to cacheOff() turns off
// caching.
void setCacheTtl(int ttl);
// Sets the time-to-live for cached result
// sets. The sqlr-cachemanger will remove each
// cached result set "ttl" seconds after it's
// created, provided it's scanning the directory
// containing the cache files.
char *getCacheFileName();
// Returns the name of the file containing the
// cached result set.
void cacheOff();
// Sets query caching off.
// If you don't need to use substitution or bind variables
// in your queries, use these two methods.
int sendQuery(char *query);
// Sends "query" and gets a result set.
int sendFileQuery(char *path, char *filename);
// Sends the query in file "path"/"filename"
// and gets a result set.
// If you need to use substitution or bind variables, in your
// queries use the following methods. See the API
// documentation for more information about substitution and
// bind variables.
void prepareQuery(char *query);
// Prepare to execute "query".
int prepareFileQuery(char *path, char *filename);
// Prepare to execute the contents
// of "path"/"filename". Returns 0 if the
// file couldn't be opened.
void clearBinds();
// Clear all bind variables.
void substitution(char *variable, char *value);
void substitution(char *variable, long value);
void substitution(char *variable, double value,
unsigned short precision,
unsigned short scale);
// Define a substitution variable.
void inputBind(char *variable, char *value);
void inputBind(char *variable, unsigned long value);
void inputBind(char *variable, double value,
unsigned short precision,
unsigned short scale);
// Define an input bind variable.
void defineOutputBind(char *variable, int bufferlength);
// Define an output bind variable.
void substitutions(char **variables, char **values);
void substitutions(char **variables, long *values);
void substitutions(char **variables, double *values,
unsigned short *precisions,
unsigned short *scales);
// Define an array of substitution variables.
void inputBinds(char **variables, char **values);
void inputBinds(char **variables, unsigned long *values);
void inputBinds(char **variables, double *values,
unsigned short *precisions,
unsigned short *scales);
// Define an array of input bind variables.
void validateBinds();
// If you are binding to any variables that
// might not actually be in your query, call
// this to ensure that the database won't try
// to bind them unless they really are in the
// query. There is a performance penalty for
// calling this method.
int executeQuery();
// Execute the query that was previously
// prepared and bound.
char *getOutputBind(char *variable);
// Get the value stored in a previously
// defined output bind variable.
int openCachedResultSet(char *filename);
// Opens a cached result set.
// Returns 1 on success and 0 on failure.
int colCount();
// Returns the number of columns in the current
// result set.
int rowCount();
// Returns the number of rows in the current
// result set (if the result set is being
// stepped through, this returns the number
// of rows processed so far).
int totalRows();
// Returns the total number of rows that will
// be returned in the result set. Not all
// databases support this call. Don't use it
// for applications which are designed to be
// portable across databases. -1 is returned
// by databases which don't support this option.
int affectedRows();
// Returns the number of rows that were
// updated, inserted or deleted by the query.
// Not all databases support this call. Don't
// use it for applications which are designed
// to be portable across databases. -1 is
// returned by databases which don't support
// this option.
int firstRowIndex();
// Returns the index of the first buffered row.
// This is useful when buffering only part of
// the result set at a time.
int endOfResultSet();
// Returns 0 if part of the result set is still
// pending on the server and 1 if not. This
// method can only return 0 if
// setResultSetBufferSize() has been called
// with a parameter other than 0.
char *errorMessage();
// If a query failed and generated an error,
// the error message is available here. If
// the query succeeded then this method
// returns a NULL.
void getNullsAsEmptyStrings();
// Tells the connection to return NULL fields
// and output bind variables as empty strings.
// This is the default.
void getNullsAsNulls();
// Tells the connection to return NULL fields
// and output bind variables as NULL's rather
// than as empty strings.
char *getField(int row, int col);
char *getField(int row, char *col);
// Returns a pointer to the value of the
// specified row and column.
long getFieldLength(int row, int col);
long getFieldLength(int row, char *col);
// Returns the length of the
// specified row and column.
char **getRow(int row);
// Returns a null terminated array of the
// values of the fields in the specified row.
long *getRowLengths(int row);
// Returns a null terminated array of the
// lengths of the fields in the specified row.
char **getColumnNames();
// Returns a null terminated array of the
// column names of the current result set.
char *getColumnName(int col);
// Returns the name of the specified column.
char *getColumnType(int col);
char *getColumnType(char *col);
// Returns the type of the specified column.
int getColumnLength(int col);
int getColumnLength(char *col);
// Returns the length of the specified column.
int getLongest(int col);
int getLongest(char *col);
// Returns the length of the longest field
// in the specified column.
int getResultSetId();
// Returns the internal ID of this result set.
// This parameter may be passed to another
// cursor for use in the resumeResultSet()
// method.
void suspendResultSet();
// Tells the server to leave this result
// set open when the connection calls
// suspendSession() so that another connection
// can connect to it using resumeResultSet()
// after it calls resumeSession().
int resumeResultSet(int id);
// Resumes a result set previously left open
// using suspendSession().
// Returns 1 on success and 0 on failure.
int resumeCachedResultSet(int id, char *filename);
// Resumes a result set previously left open
// using suspendSession() and continues caching
// the result set to "filename".
// Returns 1 on success and 0 on failure.
#include <sqlrelay/private/sqlrcursor.h>
};
#endif
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