<blockquote style="border-left: 1px solid #aaa; margin: 10px 0; padding: 0 10px;"><p style="white-space: pre-wrap; word-wrap: break-word;">Patch Set 4:</p><blockquote style="border-left: 1px solid #aaa; margin: 10px 0; padding: 0 10px;"><p style="white-space: pre-wrap; word-wrap: break-word;">Patch Set 3:</p><blockquote style="border-left: 1px solid #aaa; margin: 10px 0; padding: 0 10px;"><p style="white-space: pre-wrap; word-wrap: break-word;">Patch Set 3:</p><p style="white-space: pre-wrap; word-wrap: break-word;">It's incorrect. SQLColAttribute() with SQL_DESC_DISPLAY_SIZE returns maximum or actual CHARACTER length of a character string instead required byte size. And DISPLAY SIZE for any character types is "the defined (for fixed types) or maximum (for variable types) number of characters needed to display the data in character form".<br>Ex, I use NVARCHAR(30) field, which content text like as 'Подменный сист админ' (20 characters, but 41 bytes). In the case SQLColAttribute() with SQL_DESC_DISPLAY_SIZE returns displaysize as 30 bytes (instead 42 by my patch).</p></blockquote><p style="white-space: pre-wrap; word-wrap: break-word;">Can you try SQLColAttribute with SQL_DESC_OCTET_LENGTH?</p></blockquote><p style="white-space: pre-wrap; word-wrap: break-word;">I've faced a problem trying SQLColAttribute() with SQL_DESC_OCTET_LENGTH. Microsoft SQL Server stores unicode characters as UTF-16 (2 bytes per char). But Asterisk, phones, logs, terminals commonly use UTF-8 (1-3 bytes per char) for handling unicode characters. Your way matches only cyrillic characters, but not CJK cases.</p><p style="white-space: pre-wrap; word-wrap: break-word;">Ex, I use NVARCHAR(15) field, which content text like as 'いろはにほへとちりぬるを' (12 characters, but 37 bytes in UTF-8). In the case SQLColAttribute() with SQL_DESC_OCTET_LENGTH returns octet length as 30 bytes.</p><p style="white-space: pre-wrap; word-wrap: break-word;">So, I suggest to expand a buffer for unicode characters to 3x bytes per char.</p></blockquote><p style="white-space: pre-wrap; word-wrap: break-word;">I don't think the predefined multiplier is a good idea.<br>The ODBC Driver Manager should resolve this issue.<br>There are 2 encodings: server (driver) and client (application).<br>If the server encoding is UTF16 and client is UTF8 then Driver Manager should convert UTF16 to UTF8 and vice versa. Look at SQL_ATTR_APP_UNICODE_TYPE and SQL_ATTR_DRIVER_UNICODE_TYPE</p><p><a href="https://gerrit.asterisk.org/c/asterisk/+/12812">View Change</a></p><ul style="list-style: none; padding: 0;"></ul><p>To view, visit <a href="https://gerrit.asterisk.org/c/asterisk/+/12812">change 12812</a>. To unsubscribe, or for help writing mail filters, visit <a href="https://gerrit.asterisk.org/settings">settings</a>.</p><div itemscope itemtype="http://schema.org/EmailMessage"><div itemscope itemprop="action" itemtype="http://schema.org/ViewAction"><link itemprop="url" href="https://gerrit.asterisk.org/c/asterisk/+/12812"/><meta itemprop="name" content="View Change"/></div></div>
<div style="display:none"> Gerrit-Project: asterisk </div>
<div style="display:none"> Gerrit-Branch: master </div>
<div style="display:none"> Gerrit-Change-Id: I50e86c8a277996f13d4a4b9b318ece0d60b279bf </div>
<div style="display:none"> Gerrit-Change-Number: 12812 </div>
<div style="display:none"> Gerrit-PatchSet: 4 </div>
<div style="display:none"> Gerrit-Owner: Boris P. Korzun <drtr0jan@yandex.ru> </div>
<div style="display:none"> Gerrit-Reviewer: Alexei Gradinari <alex2grad@gmail.com> </div>
<div style="display:none"> Gerrit-Reviewer: Boris P. Korzun <drtr0jan@yandex.ru> </div>
<div style="display:none"> Gerrit-Reviewer: Friendly Automation </div>
<div style="display:none"> Gerrit-Reviewer: George Joseph <gjoseph@digium.com> </div>
<div style="display:none"> Gerrit-Comment-Date: Tue, 03 Sep 2019 14:10:12 +0000 </div>
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