Fix output length error and output buffer.#1255
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When dealing with multibyte strings, the substring limit of 4000 **chars** is not correct. We need to apply a limit of 4000 **bytes** to both VARCHAR2 and to CLOB data types. This means we need to have a function to calculate lenght of CLOB in bytes. This is now added and all the conversions/trimming/string-splitting is done using the string length in **bytes** Additionally, a different approach (with sequences) was introduced into output buffers to avoid the sometime occurring PK violation on the output buffer tables. The new approach may add a but overhead on reading from / saving into buffer, but will definitely address the threat of PK errors. Resolves #1254 Resolves #1128 Replaced all regexp ranges with posix representations to avoid NLS_SORT impact on regex behavior.
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Additional details and impacted files@@ Coverage Diff @@
## develop #1255 +/- ##
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+ Coverage 94.67% 94.80% +0.12%
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Files 111 111
Lines 5374 5372 -2
Branches 33 34 +1
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+ Hits 5088 5093 +5
+ Misses 278 271 -7
Partials 8 8
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When dealing with multibyte strings, the substring limit of 4000 chars is not correct. We need to apply a limit of 4000 bytes to both VARCHAR2 and to CLOB data types. This means we need to have a function to calculate lenght of CLOB in bytes. This is now added and all the conversions/trimming/string-splitting is done using the string length in bytes
Additionally, a different approach (with sequences) was introduced into output buffers to avoid the sometime occurring PK violation on the output buffer tables. The new approach may add a but overhead on reading from / saving into buffer, but will definitely address the threat of PK errors.
Resolves #1254
Resolves #1128