DBLINK_BUILD_SQL_INSERT(3)
NAME
dblink_build_sql_insert - builds an INSERT statement using a local
tuple, replacing the primary key field values with alternative supplied
values
SYNOPSIS
dblink_build_sql_insert(text relname,
int2vector primary_key_attnums,
integer num_primary_key_atts,
text[] src_pk_att_vals_array,
text[] tgt_pk_att_vals_array) returns text
DESCRIPTION
dblink_build_sql_insert can be useful in doing selective replication of
a local table to a remote database. It selects a row from the local
table based on primary key, and then builds a SQL INSERT command that
will duplicate that row, but with the primary key values replaced by
the values in the last argument. (To make an exact copy of the row,
just specify the same values for the last two arguments.)
ARGUMENTS
relname
Name of a local relation, for example foo or myschema.mytab.
Include double quotes if the name is mixed-case or contains special
characters, for example "FooBar"; without quotes, the string will
be folded to lower case.
primary_key_attnums
Attribute numbers (1-based) of the primary key fields, for example
1 2.
num_primary_key_atts
The number of primary key fields.
src_pk_att_vals_array
Values of the primary key fields to be used to look up the local
tuple. Each field is represented in text form. An error is thrown
if there is no local row with these primary key values.
tgt_pk_att_vals_array
Values of the primary key fields to be placed in the resulting
INSERT command. Each field is represented in text form.
RETURN VALUE
Returns the requested SQL statement as text.
NOTES
As of PostgreSQL 9.0, the attribute numbers in primary_key_attnums are
interpreted as logical column numbers, corresponding to the column's
position in SELECT * FROM relname. Previous versions interpreted the
numbers as physical column positions. There is a difference if any
column(s) to the left of the indicated column have been dropped during
the lifetime of the table.
EXAMPLES
SELECT dblink_build_sql_insert('foo', '1 2', 2, '{"1", "a"}', '{"1", "b''a"}');
dblink_build_sql_insert
--------------------------------------------------
INSERT INTO foo(f1,f2,f3) VALUES('1','b''a','1')
(1 row)
PostgreSQL 9.4.15 2017 dblink_build_sql_insert(3)
PostgreSQL 9.4.15 - Generated Wed Nov 29 16:35:04 CST 2017