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Bulk loading data using the LOAD TABLE statement
Using command files
to load data
Transaction
processing and LOAD
TABLE
Summary of LOAD
TABLE syntax
Load specification
176
To load large amounts of data, most users create command files. To create a
command file, follow the instructions in the chapter entitled "Getting Started
with DBISQL" in the Introduction to Adaptive Server IQ.
When you issue the
LOAD TABLE
automatically before the data is loaded. If the load completes successfully,
Adaptive Server IQ releases the savepoint. If the load fails, the transaction rolls
back to the savepoint. This approach gives you flexibility in committing
transactions. For example, if you issue two
ensure that either both commit or neither.
When you issue
LOAD TABLE
savepoint. If the load succeeds, it commits automatically. If the load fails, it
rolls back. You cannot roll back a successful load of a Catalog Store table.
For more information on transaction processing, see Chapter 8, "Transactions
and Versioning".
The basic form of the
LOAD TABLE
LOAD TABLE [ owner ]. table-name
[ ( load - specification , ... ) ]
FROM ' filename - string ', ...
[ FORMAT { 'ascii' | 'binary' } ]
... [ DELIMITED BY string ]
... [ STRIP { ON | OFF } ]
... [ QUOTES { ON | OFF } ]
... [ ESCAPES { ON | OFF } ]
[ ESCAPE CHARACTER character ]
[ WITH CHECKPOINT ON|OFF ]
... [ load-options ]
The load-specification does the following:
•
Lists each column to be loaded and describes the data in it. A column can
contain fixed-length data, variable-length characters delimited by a
separator, or data that uses a binary prefix to represent the number of bytes
being read.
•
Specifies
format for any fields you want to skip.
FILLER
The syntax for load-specification is as follows:
load-specification :
{ column-name [ column-spec ] |
FILLER ( filler-type ) }
statement for an IQ table, a savepoint occurs
LOAD TABLE
for a Catalog Store table, there is no automatic
statement is:
commands, you can
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