JavaScript compilation failure: Unhandled SyntaxError: Unforeseen token '>' in string variable within an if statement -- Snowflake

Question

JavaScript compilation failure: Unhandled SyntaxError: Unforeseen token '>' in string variable within an if statement -- Snowflake

Looks like there's an issue with JavaScript compilation. The error message reads: Uncaught SyntaxError: Unexpected token '>' in HP_SEARCHCBHMESSAGES at ' if (Fac123 <> "") ' position 1..

Strange how SF is not accepting the if condition (Fac123 <> "" ), even after trying if (Fac123 <> '' ). Any ideas on how to resolve this?

Any help or advice would be greatly appreciated!

CALL PROC1('param1' )

CREATE OR REPLACE PROCEDURE PROC1("param1" nvarchar(100) )
returns varchar
language javascript
AS 
$$

var Fac123 = param1
**if (Fac123 <> "" )** 
    {
      sql12 = " AND "
    }
return sql12 ;

javascript snowflake-cloud-data-platform

Answer 1

Answer №1

When working inside a JavaScript procedure, it is important to remember that the only valid language to use is Javascript. Therefore, you must utilize the JavaScript "not equals" operator !==

CREATE OR REPLACE PROCEDURE PROC1("param1" nvarchar(100))
returns varchar
language javascript
AS 
$$

var Fac123 = param1
if (Fac123 !== "")
{
      sql12 = " AND "
}
return sql12 ;
$$;

Now, let's see how it can be used:

call PROC1('blar');

This will output:

PROC1
AND

On the other hand, passing in an empty string like this:

call PROC1('');

Will result in an error since your code does not handle that scenario yet.

Error 100132 (P0000): JavaScript execution error: Uncaught ReferenceError: sql12 is not defined in PROC1 at 'return sql12 ;' position 0

Stacktrace:

Procedure line: 8

Answer 2

When working inside a JavaScript procedure, it is important to remember that the only valid language to use is Javascript. Therefore, you must utilize the JavaScript "not equals" operator !==

CREATE OR REPLACE PROCEDURE PROC1("param1" nvarchar(100))
returns varchar
language javascript
AS 
$$

var Fac123 = param1
if (Fac123 !== "")
{
      sql12 = " AND "
}
return sql12 ;
$$;

Now, let's see how it can be used:

call PROC1('blar');

This will output:

PROC1
AND

On the other hand, passing in an empty string like this:

call PROC1('');

Will result in an error since your code does not handle that scenario yet.

Error 100132 (P0000): JavaScript execution error: Uncaught ReferenceError: sql12 is not defined in PROC1 at 'return sql12 ;' position 0

Stacktrace:

Procedure line: 8

Answer 3

Answer №2

The code given here proposes an experiment in developing a code generator using a method known as the kitchen sink pattern (i.e. including a parameter if provided, otherwise removing it from the WHERE condition).

Another approach is to utilize NULL safe comparison. For instance, if the missing value is passed as an empty string:

SELECT *
FROM ...
WHERE ...
  AND col IS NOT DISTINCT FROM COALESCE(NULLIF("param1", ''), col)

If the absent value is sent as NULL from the application, a simpler solution can be adopted:

SELECT *
FROM ...
WHERE ...
  AND col IS NOT DISTINCT FROM COALESCE("param1", col)

This allows for stacking conditions in advance using AND:

SELECT *
FROM ...
WHERE ...
  AND col  IS NOT DISTINCT FROM COALESCE("param1", col)
  AND col2 IS NOT DISTINCT FROM COALESCE("param2", col2)
  AND col3 IS NOT DISTINCT FROM COALESCE("param3", col3) 
  -- ...

When parameters are supplied as NULL, they default to colX, and colX <=> colX always holds true.

Answer 4

The code given here proposes an experiment in developing a code generator using a method known as the kitchen sink pattern (i.e. including a parameter if provided, otherwise removing it from the WHERE condition).

Another approach is to utilize NULL safe comparison. For instance, if the missing value is passed as an empty string:

SELECT *
FROM ...
WHERE ...
  AND col IS NOT DISTINCT FROM COALESCE(NULLIF("param1", ''), col)

If the absent value is sent as NULL from the application, a simpler solution can be adopted:

SELECT *
FROM ...
WHERE ...
  AND col IS NOT DISTINCT FROM COALESCE("param1", col)

This allows for stacking conditions in advance using AND:

SELECT *
FROM ...
WHERE ...
  AND col  IS NOT DISTINCT FROM COALESCE("param1", col)
  AND col2 IS NOT DISTINCT FROM COALESCE("param2", col2)
  AND col3 IS NOT DISTINCT FROM COALESCE("param3", col3) 
  -- ...

When parameters are supplied as NULL, they default to colX, and colX <=> colX always holds true.

Answer 5

Answer №3

There is a need to correct the 'if' statement and add a semi-colon after the variable declaration. Please see the revised code below:

Error Code -

CREATE OR REPLACE PROCEDURE PROC1("param1" nvarchar(100) )
returns varchar
language javascript
AS
$$
var Fac123 = param1;
if (Fac123 != "" )
    {
      sql12 = " AND ";
    }
return sql12 ;
$$
;
+--------------------------------------+
| status                               |
|--------------------------------------|
| Function PROC1 successfully created. |
+--------------------------------------+
1 Row(s) produced. Time Elapsed: 0.151s

CALL PROC1('param1' );
100131 (P0000): JavaScript compilation error: Uncaught SyntaxError: Unexpected token '>' in PROC1 at 'if (Fac123 <> "" )' position 12

Fixed code -

CREATE OR REPLACE PROCEDURE PROC1("param1" nvarchar(100) )
returns varchar
language javascript
AS
$$
var Fac123 = param1;
if (Fac123 != "" )
    {
      sql12 = " AND ";
    }
return sql12 ;
$$
;
+--------------------------------------+
| status                               |
|--------------------------------------|
| Function PROC1 successfully created. |
+--------------------------------------+

CALL PROC1('param1' );
+-------+
| PROC1 |
|-------|
|  AND  |
+-------+

Answer 6

There is a need to correct the 'if' statement and add a semi-colon after the variable declaration. Please see the revised code below:

Error Code -

CREATE OR REPLACE PROCEDURE PROC1("param1" nvarchar(100) )
returns varchar
language javascript
AS
$$
var Fac123 = param1;
if (Fac123 != "" )
    {
      sql12 = " AND ";
    }
return sql12 ;
$$
;
+--------------------------------------+
| status                               |
|--------------------------------------|
| Function PROC1 successfully created. |
+--------------------------------------+
1 Row(s) produced. Time Elapsed: 0.151s

CALL PROC1('param1' );
100131 (P0000): JavaScript compilation error: Uncaught SyntaxError: Unexpected token '>' in PROC1 at 'if (Fac123 <> "" )' position 12

Fixed code -

CREATE OR REPLACE PROCEDURE PROC1("param1" nvarchar(100) )
returns varchar
language javascript
AS
$$
var Fac123 = param1;
if (Fac123 != "" )
    {
      sql12 = " AND ";
    }
return sql12 ;
$$
;
+--------------------------------------+
| status                               |
|--------------------------------------|
| Function PROC1 successfully created. |
+--------------------------------------+

CALL PROC1('param1' );
+-------+
| PROC1 |
|-------|
|  AND  |
+-------+

JavaScript compilation failure: Unhandled SyntaxError: Unforeseen token '>' in string variable within an if statement -- Snowflake

Answer №1

Answer №2

Answer №3

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