when construct new tuple for update?
hi
I want that find where did a new tuple data construct in postgresql code
when query is update.
I find that ExecModiryTable is an upper function for do it. but I want to
find exact place that create the data of one row of table.
can you help me?
On Wed, Sep 18, 2013 at 2:21 PM, mohsen soodkhah mohammadi
<mohsensoodkhah@gmail.com> wrote:
hi
I want that find where did a new tuple data construct in postgresql code
when query is update.
I find that ExecModiryTable is an upper function for do it. but I want to
find exact place that create the data of one row of table.
heap_form_tuple() construct a new tuple from the given values[] and
isnull[] arrays and incase of UPDATE operation, it gets called in
below call stack
ExecModifyTable()->ExecUpdate()->ExecMaterializeSlot()->ExecCopySlotTuple()->heap_form_tuple()
Values to construct new tuple are formed during projection in
ExecProject() which is called as below call stack in UPDATE operation:
ExecModifyTable()->ExecProcNode()->ExecSeqScan()->ExecScan()->ExecProject()
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
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