psql passing parameter to sql script - postgresql

Question

psql version 9.2, server version 12.0.
Trying to pass parameter to sql script ,
Executing the script and passing parameter :
psql --echo-queries -v ON_ERROR_STOP=0 -v TEST=100 postgresql://${curr_connection}<< EOF 1 > ${log_file} 2>&1
\timing
\i sql_script.sql
EOF
Please note I confirm script is working with no issue when using hardcoded value(without the parameter) ,
I guess it may relate that the parameter inside a quote or somthing,
sql_script.sql
INSERT INTO ACT_HI_COMMENT (action_,full_msg_,id_,message_,proc_inst_id_,task_id_,time_,type_,user_id_)
SELECT * FROM DBLINK ('host= MYHOST user=MYUSER password = MYPASS dbname=MYDB port=6432',
'SELECT ACT_HI_COMMENT.message_,ACT_HI_COMMENT.proc_inst_id_ FROM ACT_HI_COMMENT
where ACT_HI_COMMENT.TASK_ID_ in (Select distinct CBAN_A.TASK_ID_ from CBAN_OSS_ACT_RU_VARIABLE_TASK
where CBAN_OSS_ACT_RU_VARIABLE_TASK.GROUP_ID = :TEST )')
AS LINKTABLE (proc_inst_id_ character varying,task_id_ character varying,time_ timestamp without time zone,type_ character varying,
user_id_ character varying);
Getting error:
psql:/infadmin/inf/sql_script.sql:2: ERROR: syntax error at or near ":"
CONTEXT: while executing query on unnamed dblink connection
I tried also a single quotes around it as :'TEST'
INSERT INTO ACT_HI_COMMENT (action_,full_msg_,id_,message_,proc_inst_id_,task_id_,time_,type_,user_id_)
SELECT * FROM DBLINK ('host= MYHOST user=MYUSER password = MYPASS dbname=MYDB port=6432',
'SELECT ACT_HI_COMMENT.message_,ACT_HI_COMMENT.proc_inst_id_ FROM ACT_HI_COMMENT
where ACT_HI_COMMENT.TASK_ID_ in
(Select distinct CBAN_A.TASK_ID_ from CBAN_OSS_ACT_RU_VARIABLE_TASK
where CBAN_OSS_ACT_RU_VARIABLE_TASK.GROUP_ID = :'TEST' )')
AS LINKTABLE (proc_inst_id_ character varying,task_id_ character varying,time_ timestamp without time zone,type_ character varying,user_id_ character varying);
Getting error:
psql:/infadmin/inf/sql_script.sql:2: ERROR: syntax error at or near "TEST"
LINE 2: ... where CBAN_OSS_ACT_RU_VARIABLE_TASK.GROUP_ID = :'TEST' ..

Answer 1

As suspect , it didnt worked as the parameter is inside the single quotes,
I solved it by spliting the whole string inside the quotes into 2 ,
by
' first_part '|| :'TEST'||' <second_part>'
So sql looks like
INSERT INTO ACT_HI_COMMENT (action_,full_msg_,id_,message_,proc_inst_id_,task_id_,time_,type_,user_id_)
SELECT * FROM DBLINK ('host= MYHOST user=MYUSER password = MYPASS dbname=MYDB port=6432',
'SELECT ACT_HI_COMMENT.message_,ACT_HI_COMMENT.proc_inst_id_ FROM ACT_HI_COMMENT
where ACT_HI_COMMENT.TASK_ID_ in
(Select distinct CBAN_A.TASK_ID_ from CBAN_OSS_ACT_RU_VARIABLE_TASK
where CBAN_OSS_ACT_RU_VARIABLE_TASK.GROUP_ID = '|| :'TEST'||' )')
AS LINKTABLE (proc_inst_id_ character varying,task_id_ character varying,time_ timestamp without time zone,type_ character varying,user_id_ character varying);
``