The GB18030 code page is a multi-byte code page, consisting of one-, two-, and four-byte characters, that extends the GB2312 code page and includes all characters defined in Unicode. Unlike most multi-byte code pages that OpenEdge supports, you cannot use the lead byte of multi-byte characters in the GB18030 code page to determine the character's length. OpenEdge uses the International Components for Unicode (ICU) library to convert characters between the GB18030 code page and Unicode within the OpenEdge GUI client.
OpenEdge supports the GB18030 code page, primarily, for file input and output. More specifically, you can use the GB18030 code page for the following:
In settings for the -cpstream, -cplog, and -cpprint startup parameters
With any ABL CONVERT SOURCE/TARGET phrase that applies to files, for example:
|
INPUT FROM gb.txt CONVERT SOURCE "GB18030".
COPY-LOB FROM FILE "gb.txt" TO myunicodeclob CONVERT SOURCE CODEPAGE "GB18030". |
With the ASC, CHR, and CODEPAGE-CONVERT functions (but if used as the target code page of CHR or CODEPAGE-CONVERT, you cannot use the resulting character or character string in ABL)
With file input and output in the SQL products
You cannot use the GB18030 code page in the following instances:
In other ABL statements (not listed above)
As a CLOB or LONGCHAR code page
In settings for the -cpinternal, -cpterm, -cprcodein, or -cprcodeout startup parameters
As a database code page
With the PROUTIL db-name -C CONVCHAR CONVERT command (although it can be used for CONVCHAR ANALYZE)