NAME¶
sqlt-diff - find the differences b/w two schemas
SYNOPSIS¶
For help:
sqlt-diff -h|--help
For a list of all valid parsers:
sqlt -l|--list
To diff two schemas:
sqlt-diff [options] file_name1=parser file_name2=parser
Options:
-d|--debug Show debugging info
DESCRIPTION¶
sqlt-diff is a utility for creating a file of SQL commands necessary to
transform the first schema provided to the second. While not yet exhaustive in
its ability to mutate the entire schema, it will report the following
- •
- New tables
Using the Producer class of the target (second) schema, any tables missing
in the first schema will be generated in their entirety (fields,
constraints, indices).
- •
- Missing/altered fields
Any fields missing or altered between the two schemas will be reported as:
ALTER TABLE <table_name>
[DROP <field_name>]
[CHANGE <field_name> <datatype> (<size>)] ;
- •
- Missing/altered indices
Any indices missing or of a different type or on different fields will be
indicated. Indices that should be dropped will be reported as such:
DROP INDEX <index_name> ON <table_name> ;
An index of a different type or on different fields will be reported as a
new index as such:
CREATE [<index_type>] INDEX [<index_name>] ON <table_name>
( <field_name>[,<field_name>] ) ;
"ALTER/DROP TABLE" and "CREATE INDEX" statements
are
not generated by the Producer, unfortunately, and may require massaging
before being passed to your target database.
AUTHOR¶
Ken Youens-Clark <kclark@cpan.org>.
SEE ALSO¶
SQL::Translator, <
http://sqlfairy.sourceforge.net>.