Hello, I have been working on making SQLite usable on IBM z/OS. Apart
from a different compile process, I think there is a glitch in sqlite's
management of EBCDIC which should be fixed.
It is about newline character management. Below my analysis of the problem:
- Routine local_getline in shell.c uses fgets to read stdin. By design
fgets (at least on z/OS) returns the newline character if read.
- The newline character is at code point 0x15 in all EBCDIC code pages
(see https://en.wikipedia.org/wiki/Category:EBCDIC_code_pages).
- The EBCDIC version of table aiClass in sqlite3.c defines code point
0x15 as CC_ILLEGAL, this causes the shell to treat NL as illegal and
reject any input as invalid.
The solution simply consists in changing the definition of code point
0x15 from CC_ILLEGAL (27) to CC_SPACE (07).
Below one line the patch generated for SQLite 3.26.0
--- sqlite3.c 2018-12-01 14:38:26.000000000 +0100
+++ sqlite3.c.mbz 2018-12-11 12:13:09.827955214 +0100
@@ -151296,7 +151296,7 @@
#ifdef SQLITE_EBCDIC
/* x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xa xb xc xd xe xf */
/* 0x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 7, 7, 27, 27,
-/* 1x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
+/* 1x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
/* 2x */ 27, 27, 27, 27, 27, 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
/* 3x */ 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27,
/* 4x */ 7, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 26, 12, 17, 20, 10,
The above change has been working for me for several sqlite releases
now. I would like to have it incorporated in the official source code as
this would allow to compile and run official SQLite releases on z/OS
unchanged.
Thank you,
mario
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