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Diffstat (limited to 'user_guide_src/source')
| -rw-r--r-- | user_guide_src/source/database/query_builder.rst | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/user_guide_src/source/database/query_builder.rst b/user_guide_src/source/database/query_builder.rst index 6ca72914f..5380d0998 100644 --- a/user_guide_src/source/database/query_builder.rst +++ b/user_guide_src/source/database/query_builder.rst @@ -681,6 +681,35 @@ associative array of values. .. note:: All values are escaped automatically producing safer queries. +$this->db->replace() +==================== + +This method executes a REPLACE statement, which is basically the SQL +standard for (optional) DELETE + INSERT, using *PRIMARY* and *UNIQUE* +keys as the determining factor. +In our case, it will save you from the need to implement complex +logics with different combinations of ``select()``, ``update()``, +``delete()`` and ``insert()`` calls. + +Example:: + + $data = array( + 'title' => 'My title', + 'name' => 'My Name', + 'date' => 'My date' + ); + + $this->db->replace('table', $data); + + // Executes: REPLACE INTO mytable (title, name, date) VALUES ('My title', 'My name', 'My date') + +In the above example, if we assume that the *title* field is our primary +key, then if a row containing 'My title' as the *title* value, that row +will be deleted with our new row data replacing it. + +Usage of the ``set()`` method is also allowed and all fields are +automatically escaped, just like with ``insert()``. + $this->db->set() ================ @@ -740,7 +769,6 @@ Or an object:: $this->db->set($object); $this->db->insert('mytable'); - ************* Updating Data ************* @@ -792,6 +820,7 @@ Or as an array:: You may also use the $this->db->set() function described above when performing updates. + $this->db->update_batch() ========================= |