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Merge pull request #2550 from amessina/master

acc: docs - database column constraint alteration for acc_extra_nulla…

Daniel-Constantin Mierla authored on 16/11/2020 08:04:05 • GitHub committed on 16/11/2020 08:04:05
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@@ -634,6 +634,10 @@ modparam("acc", "acc_prepare_always", 1)
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 			set to 0, the value is saved as empty string (the existing behavior).
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 		</para>
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 		<para>
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+		Database columns may need to be altered to DROP NOT NULL constraints
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+		and DROP DEFAULT values in order to accept NULL values.
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+		</para>
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+		<para>
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 		Default value is 0.
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 		</para>
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 		<example>
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@@ -1157,6 +1161,10 @@ modparam("acc", "cdr_extra", "c1=$dlg_var(caller);c2=$dlg_var(callee)"
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 		If set to 1, custom CDR fields not defined in config operation (or set to $null) will be saved as NULL.
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 		</para>
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 		<para>
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+		Database columns may need to be altered to DROP NOT NULL constraints
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+		and DROP DEFAULT values in order to accept NULL values.
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+		</para>
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+		<para>
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 		Default value is 0.
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 		</para>
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 		<example>