add execute_postgres_sql

src/dbUtil.jl

@@ -8,6 +8,36 @@ using ..util
 #[PENDING] update code to use JSON
 # ---------------------------------------------- 100 --------------------------------------------- #
 
+""" Execute SQL against a PostgreSQL database using LibPQ connection string.
+
+# Arguments
+- `pg_conn_str::AbstractString`: PostgreSQL connection string in format "host=... port=... dbname=... user=... password=..."
+- `sql::AbstractString`: SQL query to execute
+
+# Returns
+- `LibPQ.Result` on success, `nothing` on failure
+
+# Example
+```julia
+pg_conn_str = "host=localhost port=5432 dbname=mydb user=myuser password=mypass"
+sql = "SELECT * FROM wine;"
+result = execute_postgres_sql(pg_conn_str, sql)
+```
+"""
+function execute_postgres_sql(pg_conn_str::T, sql::T) where {T<:AbstractString}
+  db_connection = LibPQ.Connection(pg_conn_str)
+  result = nothing
+  try
+    result = LibPQ.execute(db_connection, sql)  
+  catch e
+    @error e
+    LibPQ.close(db_connection)
+  end
+  
+  LibPQ.close(db_connection)
+  return result
+end
+
 
 """
 dictToPostgresKeyValueString - Convert dictionary to PostgreSQL key-value string format