DBLINK_B...QL_DELETE(3)

💅 dblink_build_sql_delete 💅

okay bestie, welcome to the DBLINK_B...QL_DELETE(3) page, straight from the PostgreSQL 15.19 Documentation ✨ this one is all about building a DELETE statement from primary-key values, and it’s lowkey iconic for selective replication. let’s get into it 💖

✨ 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 🦋

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

🎀 ARGUMENTS 🎀

• relname — the 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. no cap, quotes matter here 🫶
• 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. literally the count 🔢
• 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. slay, that’s the whole return vibe ✨

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

mwah 💋 — PostgreSQL 15.19 docs, dated 2026, signing off bestie! 🫶💖