Users/hattorihenzo/support procedure call without curly braces

[Hattori Henzo (HattoriHenzo)]

Description

This pull request enhances the parsing and validation of SQL call syntax in the JDBC driver, ensuring correct handling of braces in stored procedure calls. It updates the regular expressions and logic to support both braced and unbraced syntax, adds validation for matching braces, and introduces comprehensive tests to verify correct and incorrect usage.

Allowed syntax: {call procedure(x,y)} or call procedure(x,y)

What's added

• Updated the SQL_IDENTIFIER_PART regex in SQLServerStatement.java to more accurately match SQL identifiers, including those outside parentheses and braces.
• Modified the JDBC_CALL_SYNTAX regex to support both optional opening and closing braces in procedure call syntax.
• Added a check in the translate method to ensure SQL statements have matching braces before applying regex parsing, throwing a SQLServerException if mismatched.
• Introduced the hasMatchingBraces helper method to encapsulate brace validation logic.

Testing

• Added tests in CallableStatementTest.java to verify that procedure calls with and without braces work correctly, and that malformed calls with mismatched braces throw exceptions as expected.
• Cleaned up test imports in CallableStatementTest.java for better readability.

[Muskan Gupta (muskan124947)]

Hattori Henzo (@HattoriHenzo)

hasMatchingBraces breaks all JDBC escape syntax

translate() is called from SQLServerConnection.parseAndCacheSQL(), which runs for every Statement.execute() and every PreparedStatement (SQLServerStatement.java:1015-1017, SQLServerPreparedStatement.java:342-348) — not just callable statements. So this new guard gates all SQL:

Java

boolean hasOpenBrace  = trimmedSql.startsWith("{");
boolean hasCloseBrace = trimmedSql.endsWith("}");
return hasOpenBrace == hasCloseBrace;

Any statement that merely ends with } without starting with { now throws R_invalidSQL. That includes the driver's own escape sequences, handled ~20 lines below in the same method:

SQL

select * from t1 {limit 3543}                          -- LimitEscapeTest.java:318
select * from t1 {limit ( (  (2)))}                     -- LimitEscapeTest.java:291
SELECT * FROM t WHERE d < {ts '2024-01-01 00:00:00'}    -- ODBC/JDBC escape
SELECT {fn UCASE(name)}                                 -- ODBC scalar fn escape

LimitEscapeTest should fail outright with this change. Conversely {call p(?)} SELECT 1 (previously valid — note the trailing .*+ in the old regex) now throws.

The method also isn't brace matching at all — it compares the first and last characters. {call a(?)}{ passes; {call a(?)} inside a string literal isn't considered.

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[Hattori Henzo (HattoriHenzo)]

Muskan Gupta (@muskan124947) Thanks for your feedback, I will take a look on it.

[Hattori Henzo (HattoriHenzo)]

Muskan Gupta (@muskan124947) I have to narrow the control of the SQL query syntax just only for CallableStatement? What do you think about implementing the control in this method SQLServerConnection#prepareCall, like at the line SQLServerConnection.java:5870 with the call of the method SQLServerConnection#checkClosed?

[Muskan Gupta (muskan124947)]

Hattori Henzo (@HattoriHenzo)
Scoping this to the callable path is the right direction — it removes the {limit ...} / {ts ...} / {fn ...} regression, since translate() currently runs for every Statement and PreparedStatement via parseAndCacheSQL(), not just calls. Two notes on placement:

1. prepareCall(String, int, int) isn't the only entry point. There are two construction sites — SQLServerConnection.java:5872 and :8149 (the holdability overload). A check at line 5870 misses the second. The single choke point both funnel through is the SQLServerCallableStatement constructor (SQLServerCallableStatement.java:100); SQLServerConnection43 and SQLServerConnectionPoolProxy delegate down to these, so they're covered for free.

Keeping the check out of translate() also avoids a callable-only rule leaking into parsedSQLCache, which is keyed on SQL text and shared across all statement types.

2. The heuristic still has false positives, even scoped. startsWith("{") == endsWith("}") rejects valid callable SQL that works today:

Java

call p({ts '2024-01-01 00:00:00'})   // ends '}' → rejected (and it's the unbraced form you want!)
{call p(?)} -- trailing comment      // ends 't' → rejected
{call p(?)};                         // ends ';' → rejected