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The Lounge What is on Your Mind? Update on vB3 Migration to Discourse - Issues and Status of BBCode Transformations Post 303045598 by Neo on Friday 3rd of April 2020 12:05:05 AM
Old 04-03-2020
Also, I am finding, by trial and error, that even before preprocessing with the Ruby migration scripts, there are some transformations which are easily done on the copy of the vB3 MySQL DB dump; for example:

Code:
UPDATE post SET  pagetext= LOWER(REGEXP_REPLACE(pagetext,'\\[ATTACH\\](.*)\\[\\/ATTACH\\]', '[IMG]https://www.unix.com/attachment.php?attachmentid=\\1[/IMG]'));

There was some bug in the Ruby attachment preprocessing and some attachment ids were lost, so instead of wasting time trying to find the bug in the Ruby preprocessing routine, it was easier to do the regex search and replace in the staged copy of the DB dump.

All these attachment images are automatically downloaded to the new discourse forum over time as well.

Note: Not being an expert in MariaDB REGEX_REPLACE, started with (.*) and worked my way up, and the matches only worked with the double backslashes (escapes) , would not match with single backslashes. None of the examples on the net worked (most showed no backslashes or one backslash only) in this REGEX_REPLACE expression; but I could get it to work, building it from .* up, step-by-step.

Update: This change is done and confirmed working on the staging server.
This User Gave Thanks to Neo For This Post:
 

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GLFRAMEBUFFERTEXTURE(3G)					   OpenGL Manual					  GLFRAMEBUFFERTEXTURE(3G)

NAME
glFramebufferTextureLayer - attach a single layer of a texture to a framebuffer C SPECIFICATION
void glFramebufferTextureLayer(GLenum target, GLenum attachment, GLuint texture, GLint level, GLint layer); PARAMETERS
target Specifies the framebuffer target. target must be GL_DRAW_FRAMEBUFFER, GL_READ_FRAMEBUFFER, or GL_FRAMEBUFFER. GL_FRAMEBUFFER is equivalent to GL_DRAW_FRAMEBUFFER. attachment Specifies the attachment point of the framebuffer. attachment must be GL_COLOR_ATTACHMENTi, GL_DEPTH_ATTACHMENT, GL_STENCIL_ATTACHMENT or GL_DEPTH_STENCIL_ATTACHMMENT. texture Specifies the texture object to attach to the framebuffer attachment point named by attachment. level Specifies the mipmap level of texture to attach. layer Specifies the layer of texture to attach. DESCRIPTION
glFramebufferTextureLayer operates like glFramebufferTexture(), except that only a single layer of the texture level, given by layer, is attached to the attachment point. If texture is not zero, layer must be greater than or equal to zero. texture must either be zero or the name of an existing three-dimensional texture, one- or two-dimensional array texture, or multisample array texture. ERRORS
GL_INVALID_ENUM is generated if target is not one of the accepted tokens. GL_INVALID_ENUM is generated if attachment is not one of the accepted tokens. GL_INVALID_VALUE is generated if texture is not zero or the name of an existing texture object. GL_INVALID_VALUE is generated if texture is not zero and layer is negative. GL_INVALID_OPERATION is generated if zero is bound to target. GL_INVALID_OPERATION is generated if texture is not zero or the name of an existing cube map texture. SEE ALSO
glGenFramebuffers(), glBindFramebuffer(), glGenRenderbuffers(), glFramebufferTexture(), glFramebufferTextureFace() COPYRIGHT
Copyright (C) 2010 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. http://opencontent.org/openpub/. AUTHORS
opengl.org opengl.org 06/10/2014 GLFRAMEBUFFERTEXTURE(3G)
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