Documentation

the maximum size of a chunk of variable length value

the buffer size used to copy files

file buffering mode

keep statistics by statement handle; for each handle record the number of records dumped so far and the total size dumped so far

dump database options

restore database options

dump a schema from an ODBC database to a binary file

dumps the database schema to the file represented by the given handle

create the header of the dump file

global environment for dumping tables in parallel

dumps all tables in a schema, on a given connection

publish the tables to the chanel read by the worker threads

monadic action to publish the table name on the tables channel

start the worker threads; each worker thread will dump data in a temporary file, then will append the contents of the temporary file to the contents of the dump file; the append is done synchronized with the other worker threads, so only one worker thread will append to the main dump file

start one worker thread

the worker thread; gets a table name from the tables channel and dumps the data in the temporary file; in the end, appends the temporary file contents to the end of the dump file contents

finalizes the dump by copying the temporary file back into the dump file

wait for worker threads to complete the work

creates an IO action inside a STM monad to allocate a new handler in the current thread

make a handle alloc request to the main thread and wait for result

environment for either single threaded or multi threaded dump

extract dumpConfig from a SingleOrMulti structure

either directly alloc handle or call allocHandleReq to alloc a handle deppending on it is run on a threaded or non threaded environment

workarround for unixODBC bug that requires that all handles should be allocated on the main thread

dumps a single table

logs the content of a FieldInfo structure

extract schema infromation from the database, using an existing db connection

extract the fields information from the database

transforms a ColumnInfo structure into a FieldInfoV1 structure

dump the table records to the file, one by one; returns the (number of records, size in bytes) of dumped data

dumps the data of one record into the file; it returns the (number of records, total bytes dumped)

monadic action that logs the data dumped until now; it uses a map that records the count of records and the size dumped for each statement handle

uncurried form of (lotStatistics hstmt)

get the TVar StatiscsMap from the environment

get the start time from the environment

dump data of a single field; adds the size of dumped data to the total size received as parameter

dump field data parameters

ReaderT monadic action that dumps a field into the dump file; returns the total dump size, adding to the prior size the size in bytes of dumped data

dumps a variable field length; the variable field length will be dumped in chunks each chunk having two fields: a length of the chunk and the actual data of the chunk. The length of the chunk will be encoded on one, two or four bytes, depending on the maximum chunk length and the maximum length of the field taken from the table's schema.

the octet length of the chunk size; it is calculated based on the transfer buffer size and on the maxumum size of the field.

dumps a chunk of data; increments the current size with the number of octets dumped and returns this value

dumps a chunk of data for a non null field; increments the current size with the number of octets dumped and returns this value

dumps a fixed length field; the buffer length of the field will be taken from the description of the field in the table's schema; the dumped data will only contain the data of the field; the first parameter represents the ODBC C data type of the data to be read from the database

dumps the data of a not null field

dumps a field of an unknown type; the field will be converted to SQL_C_CHAR and dumped as a string of characters

create the select for dumping table data

read the binary dump of a database and restores it in a destination ODBC data source