Re: WIP: index support for regexp search

I also have a question about pg_wchar.

/*
*-------------------------------------------------------------------
* encoding info table
* XXX must be sorted by the same order as enum pg_enc (in mb/pg_wchar.h)
*-------------------------------------------------------------------
*/
pg_wchar_tbl pg_wchar_table[] = {
{pg_ascii2wchar_with_len, pg_ascii_mblen, pg_ascii_dsplen,
pg_ascii_verifier, 1}, /* PG_SQL_ASCII */
{pg_eucjp2wchar_with_len, pg_eucjp_mblen, pg_eucjp_dsplen,
pg_eucjp_verifier, 3}, /* PG_EUC_JP */
{pg_euccn2wchar_with_len, pg_euccn_mblen, pg_euccn_dsplen,
pg_euccn_verifier, 2}, /* PG_EUC_CN */
{pg_euckr2wchar_with_len, pg_euckr_mblen, pg_euckr_dsplen,
pg_euckr_verifier, 3}, /* PG_EUC_KR */
{pg_euctw2wchar_with_len, pg_euctw_mblen, pg_euctw_dsplen,
pg_euctw_verifier, 4}, /* PG_EUC_TW */
{pg_eucjp2wchar_with_len, pg_eucjp_mblen, pg_eucjp_dsplen,
pg_eucjp_verifier, 3}, /* PG_EUC_JIS_2004 */
{pg_utf2wchar_with_len, pg_utf_mblen, pg_utf_dsplen, pg_utf8_verifier, 4}, /*
PG_UTF8 */
{pg_mule2wchar_with_len, pg_mule_mblen, pg_mule_dsplen, pg_mule_verifier,
4}, /* PG_MULE_INTERNAL */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN1 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN2 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN3 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN4 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN5 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN6 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN7 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN8 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN9 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_LATIN10 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1256 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1258 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN866 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN874 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_KOI8R */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1251 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1252 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* ISO-8859-5 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* ISO-8859-6 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* ISO-8859-7 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* ISO-8859-8 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1250 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1253 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1254 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1255 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_WIN1257 */
{pg_latin12wchar_with_len, pg_latin1_mblen, pg_latin1_dsplen,
pg_latin1_verifier, 1}, /* PG_KOI8U */
{0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2}, /* PG_SJIS */
{0, pg_big5_mblen, pg_big5_dsplen, pg_big5_verifier, 2}, /* PG_BIG5 */
{0, pg_gbk_mblen, pg_gbk_dsplen, pg_gbk_verifier, 2}, /* PG_GBK */
{0, pg_uhc_mblen, pg_uhc_dsplen, pg_uhc_verifier, 2}, /* PG_UHC */
{0, pg_gb18030_mblen, pg_gb18030_dsplen, pg_gb18030_verifier, 4}, /*
PG_GB18030 */
{0, pg_johab_mblen, pg_johab_dsplen, pg_johab_verifier, 3}, /* PG_JOHAB */
{0, pg_sjis_mblen, pg_sjis_dsplen, pg_sjis_verifier, 2} /*
PG_SHIFT_JIS_2004 */
};

What does last 7 zeros in the first column means? No conversion to pg_wchar
is possible from these encodings?

------
With best regards,
Alexander Korotkov.