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DBI: raiseerror in eval

由 一曲冷凌霜 提交于 2020-01-13 06:24:09
问题 This question refers to this comment from Ikegami: [...] But if you're going to put an eval around every statement, just use RaiseError => 0. [...] in this thread. What do I gain, if I set RaiseError to 0 in such situations? #!/usr/bin/env perl use warnings; use 5.10.1; use DBI; my $db = 'my_test_sqlite_db.sqlite'; open my $fh, '>', $db or die $!; close $fh or die $!; my ( $dbh, $sth ); eval { $dbh = DBI->connect( "DBI:SQLite:dbname=$db", "", "", {} ); }; if ( $@ ) { print $@ }; my $table =

Custom errors in mysql trigger [duplicate]

由 ▼魔方 西西 提交于 2019-12-23 05:41:46
问题 This question already has answers here : Closed 7 years ago . Possible Duplicate: raise error within MySql function In MsSQL I can raise a custom error: CREATE TRIGGER [dbo].[TR__TABLE__DisableRowOnDelete] ON [dbo].[TABLE] INSTEAD OF DELETE AS BEGIN RAISERROR ('Data cannot be deleted.', 16, 1); END How might I do that in MySQL? 回答1: In MySQL 5.5 you can use a SIGNAL statement, e.g. - CREATE PROCEDURE TR__TABLE__DisableRowOnDelete() BEGIN SIGNAL SQLSTATE '02000' SET MESSAGE_TEXT = 'Data cannot

SQL Raise Application Error Trigger

由 放肆的年华 提交于 2019-12-20 04:55:14
问题 This is throwing "Error: ORA-04082: NEW or OLD references not allowed in table level triggers" I'm not sure where I'm going wrong. The error number shouldn't make a difference should it? CREATE OR REPLACE TRIGGER REJECTION BEFORE INSERT OR UPDATE ON TEA_PREFS_T DECLARE temp NUMBER; BEGIN SELECT COUNT(*) INTO temp FROM tea_prefs_t WHERE person = :new.drinkerid; IF (temp >=10) THEN raise_application_error(-20101, 'ERROR: CANNOT INSERT MORE THAN 10'); ROLLBACK; END IF; END; 回答1: As the error

Raising an exception for a grey streetview location in Google Maps JavaScript API v3

由 梦想的初衷 提交于 2019-12-13 05:56:41
问题 Look, I'm using Google Maps JavaScript API v3. The user fills in an address and I show the streetview of that address. Everything's fine (a lot of locations work perfectly), till a enter a location like "Laken". It just displays grey, nothing else. I want to prevent the user from continuing to the next page with a grey image instead of a google maps streetview. When I fill in Laken, the getPanoramaByLocation() function returns status == "OK", because it has found something, but its not a

DBI: raiseerror in eval

由 对着背影说爱祢 提交于 2019-12-04 15:51:39
This question refers to this comment from Ikegami: [...] But if you're going to put an eval around every statement, just use RaiseError => 0. [...] in this thread . What do I gain, if I set RaiseError to 0 in such situations? #!/usr/bin/env perl use warnings; use 5.10.1; use DBI; my $db = 'my_test_sqlite_db.sqlite'; open my $fh, '>', $db or die $!; close $fh or die $!; my ( $dbh, $sth ); eval { $dbh = DBI->connect( "DBI:SQLite:dbname=$db", "", "", {} ); }; if ( $@ ) { print $@ }; my $table = 'my_sqlite_table'; say "RaiseError = 1"; say "PrintError = 0"; $dbh->{RaiseError} = 1; $dbh->

SQL Raise Application Error Trigger

由 醉酒当歌 提交于 2019-12-02 05:42:37
This is throwing "Error: ORA-04082: NEW or OLD references not allowed in table level triggers" I'm not sure where I'm going wrong. The error number shouldn't make a difference should it? CREATE OR REPLACE TRIGGER REJECTION BEFORE INSERT OR UPDATE ON TEA_PREFS_T DECLARE temp NUMBER; BEGIN SELECT COUNT(*) INTO temp FROM tea_prefs_t WHERE person = :new.drinkerid; IF (temp >=10) THEN raise_application_error(-20101, 'ERROR: CANNOT INSERT MORE THAN 10'); ROLLBACK; END IF; END; As the error suggests, you can only refer to the new and old pseudo-rows in a row-level trigger, not a table-level trigger,
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