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Generated columns

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This is an SQL-standard feature that allows creating columns that are
computed from expressions rather than assigned, similar to a view or
materialized view but on a column basis.

This implements one kind of generated column: stored (computed on
write).  Another kind, virtual (computed on read), is planned for the
future, and some room is left for it.

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Reviewed-by: Pavel Stehule <pavel.stehule@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/b151f851-4019-bdb1-699e-ebab07d2f40a@2ndquadrant.com
This commit is contained in:
Peter Eisentraut
2019-03-30 08:13:09 +01:00
parent 6b8b5364dd
commit fc22b6623b
84 changed files with 3067 additions and 157 deletions
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5
src/pl/plpython/plpy_cursorobject.c
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@@ -357,7 +357,7 @@ PLy_cursor_iternext(PyObject *self)
exec_ctx->curr_proc);
ret = PLy_input_from_tuple(&cursor->result, SPI_tuptable->vals[0],
SPI_tuptable->tupdesc);
SPI_tuptable->tupdesc, true);
}
SPI_freetuptable(SPI_tuptable);
@@ -453,7 +453,8 @@ PLy_cursor_fetch(PyObject *self, PyObject *args)
{
PyObject *row = PLy_input_from_tuple(&cursor->result,
SPI_tuptable->vals[i],
SPI_tuptable->tupdesc);
SPI_tuptable->tupdesc,
true);
PyList_SetItem(ret->rows, i, row);
}