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v5:reference:connection:insert_id

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v5:reference:connection:insert_id [2018/06/11 10:16]
dregad [Usage] function names starting with lowercase (#426)
v5:reference:connection:insert_id [2019/07/08 22:20] (current)
mnewnham
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 It is important to remember that there is only a single storage instance for the number, and if one insert statement with an auto-increment number succeeds another, the insert_id value for the second statement will overwrite the value of the first, so retrieve the value of the first before executing the second. It is important to remember that there is only a single storage instance for the number, and if one insert statement with an auto-increment number succeeds another, the insert_id value for the second statement will overwrite the value of the first, so retrieve the value of the first before executing the second.
- 
-===== Postgresql / SAP MaxDB ===== 
- 
-The only drivers that __require__ the optional ''​$table''​ and ''​$column''​ arguments are [[v5:​database:​postgresql]] and [[v5:​database:​sap_maxdb]] as they support table and column specific insert id numbers. 
  
 ===== Usage ===== ===== Usage =====
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  */  */
 </​code>​ </​code>​
 +
 +===== Oracle Using Emulated Sequences =====
 +If you use the emulated sequence function with the [[v5:​database:​oracle|OCI8]] driver, you __must__ provide the table name in order to retrieve the last sequence. This is because the value is being returned from a table related sequence, not a global insertId instance.
 +
 +<code php>
 +
 +/*
 + * Oracle Connection assumed
 + */
 +$sequence = insertId('​some_table'​);​
 +</​code>​
 +
 +For that reason, the usage rules about a single instance do not apply. However if you are writing cross-database code you should follow those rules.
 +
 +===== Postgresql / SAP MaxDB =====
 +
 +The only drivers that __require__ the optional ''​$table''​ and ''​$column''​ arguments are [[v5:​database:​postgresql]] and [[v5:​database:​sap_maxdb]] as they support table and column specific insert id numbers.
 +
 +
v5/reference/connection/insert_id.1528705012.txt.gz · Last modified: 2018/06/11 10:16 by dregad