DBLINK_BUILD_SQL_DELETE(3)

NAME
dblink_build_sql_delete - builds a DELETE statement using supplied values for primary key field values

SYNOPSIS

dblink_build_sql_delete(text relname,
                        int2vector primary_key_attnums,
                        integer num_primary_key_atts,
                        text[] tgt_pk_att_vals_array) returns text

DESCRIPTION

    Note

    The following description applies only to Postgres-XC

dblink module has not been tested with Postges-XC yet. Although there're no reason that dblink does not run in Postgres-XC, the development team leaves the test and the use of this module entirely to users.

This section is identical to the corresponding PostgreSQL reference manual.

    Note

    The following description applies only to PostgreSQL

dblink_build_sql_delete can be useful in doing selective replication of a local table to a remote database. It builds a SQL DELETE command that will delete the row with the given primary key values.

ARGUMENTS

    Note

    The following description applies only to Postgres-XC

dblink module has not been tested with Postges-XC yet. Although there're no reason that dblink does not run in Postgres-XC, the development team leaves the test and the use of this module entirely to users.

This section is identical to the corresponding PostgreSQL reference manual.

    Note

    The following description applies only to PostgreSQL

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.

tgt_pk_att_vals_array
    Values of the primary key fields to be used in the resulting DELETE command. Each field is represented in text form.

RETURN VALUE

    Note

    The following description applies only to Postgres-XC

dblink module has not been tested with Postges-XC yet. Although there're no reason that dblink does not run in Postgres-XC, the development team leaves the test and the use of this module entirely to users.

This section is identical to the corresponding PostgreSQL reference manual.

    Note

    The following description applies only to PostgreSQL

Returns the requested SQL statement as text.

NOTES

    Note

    The following description applies only to Postgres-XC

dblink module has not been tested with Postges-XC yet. Although there're no reason that dblink does not run in Postgres-XC, the development team leaves the test and the use of this module entirely to users.

This section is identical to the corresponding PostgreSQL reference manual.

    Note

    The following description applies only to PostgreSQL

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

    Note

    The following description applies only to Postgres-XC

dblink module has not been tested with Postges-XC yet. Although there're no reason that dblink does not run in Postgres-XC, the development team leaves the test and the use of this module entirely to users.

This section is identical to the corresponding PostgreSQL reference manual.

    Note

    The following description applies only to PostgreSQL

    SELECT dblink_build_sql_delete('"MyFoo"', '1 2', 2, '{"1", "b"}');
               dblink_build_sql_delete
    ---------------------------------------------
     DELETE FROM "MyFoo" WHERE f1='1' AND f2='b'
    (1 row)