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Add bytea datatype to ECPG.

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So far ECPG programs had to treat binary data for bytea column as 'char' type.
But this meant converting from/to escaped format with PQunescapeBytea/
PQescapeBytea() and therefore forcing users to add unnecessary code and cost
for the conversion in runtime. By adding a dedicated datatype for bytea most of
this special handling is no longer needed.

Author: Matsumura-san ("Matsumura, Ryo" <matsumura.ryo@jp.fujitsu.com>)

Discussion: https://postgr.es/m/flat/03040DFF97E6E54E88D3BFEE5F5480F737A141F9@G01JPEXMBYT04
This commit is contained in:
Michael Meskes
2019-02-18 10:20:31 +01:00
parent 3fdc374b5d
commit 050710b369
18 changed files with 985 additions and 51 deletions
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7
src/interfaces/ecpg/ecpglib/misc.c
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@@ -355,6 +355,9 @@ ECPGset_noind_null(enum ECPGttype type, void *ptr)
*(((struct ECPGgeneric_varchar *) ptr)->arr) = 0x00;
((struct ECPGgeneric_varchar *) ptr)->len = 0;
break;
case ECPGt_bytea:
((struct ECPGgeneric_bytea *) ptr)->len = 0;
break;
case ECPGt_decimal:
memset((char *) ptr, 0, sizeof(decimal));
((decimal *) ptr)->sign = NUMERIC_NULL;
@@ -428,6 +431,10 @@ ECPGis_noind_null(enum ECPGttype type, const void *ptr)
if (*(((const struct ECPGgeneric_varchar *) ptr)->arr) == 0x00)
return true;
break;
case ECPGt_bytea:
if (((struct ECPGgeneric_bytea *) ptr)->len == 0)
return true;
break;
case ECPGt_decimal:
if (((const decimal *) ptr)->sign == NUMERIC_NULL)
return true;