PostgreSQL 8.4.21 Documentation
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dblink_build_sql_delete

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,
                            int2 num_primary_key_atts,
                            text[] tgt_pk_att_vals_array) returns text

Description

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

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

Returns the requested SQL statement as text.

Example

 test=# 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)
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