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Add transforms feature

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This provides a mechanism for specifying conversions between SQL data
types and procedural languages.  As examples, there are transforms
for hstore and ltree for PL/Perl and PL/Python.

reviews by Pavel Stěhule and Andres Freund
This commit is contained in:
Peter Eisentraut
2015-04-26 10:33:14 -04:00
parent f320cbb615
commit cac7658205
101 changed files with 6034 additions and 2811 deletions
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15
src/backend/nodes/equalfuncs.c
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@@ -1779,6 +1779,18 @@ _equalImportForeignSchemaStmt(const ImportForeignSchemaStmt *a, const ImportFore
return true;
}
static bool
_equalCreateTransformStmt(const CreateTransformStmt *a, const CreateTransformStmt *b)
{
COMPARE_SCALAR_FIELD(replace);
COMPARE_NODE_FIELD(type_name);
COMPARE_STRING_FIELD(lang);
COMPARE_NODE_FIELD(fromsql);
COMPARE_NODE_FIELD(tosql);
return true;
}
static bool
_equalCreateTrigStmt(const CreateTrigStmt *a, const CreateTrigStmt *b)
{
@@ -2991,6 +3003,9 @@ equal(const void *a, const void *b)
case T_ImportForeignSchemaStmt:
retval = _equalImportForeignSchemaStmt(a, b);
break;
case T_CreateTransformStmt:
retval = _equalCreateTransformStmt(a, b);
break;
case T_CreateTrigStmt:
retval = _equalCreateTrigStmt(a, b);
break;