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fix: ELSEIF handling #155

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fix: ELSEIF handling #155

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11292b0
fix: ELSEIF handling in SQL formatter to resolve unclosed parentheses…
bendavies Jul 15, 2025
d2702cb
fix: AND/OR newline behavior within IF conditions
bendavies Jul 15, 2025
bafed54
feat: add support for ELSIF keyword alongside ELSEIF
bendavies Jul 22, 2025
a9ec3ec
feat: extend AND/OR formatting optimization to CASE WHEN conditions
bendavies Sep 4, 2025
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28 changes: 24 additions & 4 deletions src/SqlFormatter.php
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Original file line number Diff line number Diff line change
Expand Up @@ -66,6 +66,7 @@ public function format(string $string, string $indentString = ' '): string
$inlineCount = 0;
$inlineIndented = false;
$clauseLimit = false;
$inBooleanExpression = false;

$appendNewLineIfNotAddedFx = static function () use (&$addedNewline, &$return, $tab, &$indentLevel): void {
// Add a newline if not already added
Expand Down Expand Up @@ -301,8 +302,8 @@ public function format(string $string, string $indentString = ' '): string
$newline = true;
$increaseBlockIndent = true;
}
} elseif (in_array($tokenValueUpper, ['WHEN', 'THEN', 'ELSE', 'END'], true)) {
if ($tokenValueUpper !== 'THEN') {
} elseif (in_array($tokenValueUpper, ['IF', 'WHEN', 'THEN', 'ELSE', 'ELSEIF', 'ELSIF', 'END'], true)) {
if ($tokenValueUpper !== 'THEN' && $tokenValueUpper !== 'IF') {
$decreaseIndentationLevelFx();

if ($prevNotWhitespaceToken !== null && strtoupper($prevNotWhitespaceToken->value()) !== 'CASE') {
Expand All @@ -314,6 +315,22 @@ public function format(string $string, string $indentString = ' '): string
$newline = true;
$increaseBlockIndent = true;
}

// Track boolean expression context for IF/ELSEIF/CASE WHEN conditions
// (not for "IF()" function calls)
if (in_array($tokenValueUpper, ['IF', 'ELSEIF', 'ELSIF'], true)) {
// Check if this IF is part of a conditional block by looking at the next token
$nextToken = $cursor->subCursor()->next(Token::TOKEN_TYPE_WHITESPACE);
if (
$nextToken !== null && $nextToken->value() !== '('
) {
$inBooleanExpression = true;
}
} elseif ($tokenValueUpper === 'WHEN') {
$inBooleanExpression = true;
} elseif ($tokenValueUpper === 'THEN' || $tokenValueUpper === 'ELSE' || $tokenValueUpper === 'END') {
$inBooleanExpression = false;
}
} elseif (
$clauseLimit &&
$token->value() !== ',' &&
Expand All @@ -332,9 +349,12 @@ public function format(string $string, string $indentString = ' '): string
$newline = true;
}
} elseif ($token->isOfType(Token::TOKEN_TYPE_RESERVED_NEWLINE)) {
// Newline reserved words start a new line
// Newline reserved words start a new line, except for AND/OR within boolean expressions

$appendNewLineIfNotAddedFx();
// Skip newlines for AND/OR when inside boolean expressions (IF conditions, CASE WHEN)
if (! $inBooleanExpression || ! in_array($tokenValueUpper, ['AND', 'OR'], true)) {
$appendNewLineIfNotAddedFx();
}

if ($token->hasExtraWhitespace()) {
$highlighted = preg_replace('/\s+/', ' ', $highlighted);
Expand Down
2 changes: 2 additions & 0 deletions src/Tokenizer.php
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Expand Up @@ -104,6 +104,8 @@ final class Tokenizer
'DUPLICATE',
'DYNAMIC',
'ELSE',
'ELSEIF',
'ELSIF',
'ENCLOSED',
'END',
'ENGINE',
Expand Down
23 changes: 23 additions & 0 deletions tests/clihighlight.txt
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Expand Up @@ -1205,3 +1205,26 @@ MY_NON_TOP_LEVEL_KEYWORD_FX_3();
CREATE TABLE t (
c VARCHAR(20)
) DEFAULT CHARACTER SET utf8mb4 ENGINE = InnoDB
---
BEGIN
IF first_name != '' AND last_name != '' THEN
RETURN CONCAT(first_name, ' ', last_name);
ELSEIF first_name != '' THEN
RETURN first_name;
ELSIF last_name != '' THEN
RETURN last_name;
ELSE
RETURN id;
END IF;
END;
---
SELECT
CASE WHEN status = 'active' AND priority = 'high' THEN
'urgent'
WHEN status = 'active' OR status = 'pending' THEN
'normal'
ELSE
'low'
END AS task_priority
FROM
tasks;
4 changes: 4 additions & 0 deletions tests/compress.txt
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Expand Up @@ -111,3 +111,7 @@ SELECT a FROM test STRAIGHT_JOIN test2 ON test.id = test2.id
SELECT t.id, t.start, t.end, t.end AS e2, t.limit, t.begin, t.case, t.when, t.then, t.else FROM t WHERE t.start = t.end
---
CREATE TABLE t (c VARCHAR(20)) DEFAULT CHARACTER SET utf8mb4 ENGINE = InnoDB
---
BEGIN IF first_name != '' AND last_name != '' THEN RETURN CONCAT(first_name, ' ', last_name); ELSEIF first_name != '' THEN RETURN first_name; ELSIF last_name != '' THEN RETURN last_name; ELSE RETURN id; END IF; END;
---
SELECT CASE WHEN status = 'active' AND priority = 'high' THEN 'urgent' WHEN status = 'active' OR status = 'pending' THEN 'normal' ELSE 'low' END AS task_priority FROM tasks;
23 changes: 23 additions & 0 deletions tests/format-highlight.html
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Expand Up @@ -1205,3 +1205,26 @@
<pre style="color: black; background-color: white;"><span style="font-weight:bold;">CREATE</span> <span style="font-weight:bold;">TABLE</span> <span style="color: #333;">t</span> (
<span style="color: #333;">c</span> <span style="font-weight:bold;">VARCHAR</span>(<span style="color: green;">20</span>)
) <span style="font-weight:bold;">DEFAULT</span> <span style="font-weight:bold;">CHARACTER</span> <span style="font-weight:bold;">SET</span> <span style="color: #333;">utf8mb4</span> <span style="font-weight:bold;">ENGINE</span> <span >=</span> <span style="color: #333;">InnoDB</span></pre>
---
<pre style="color: black; background-color: white;"><span style="font-weight:bold;">BEGIN</span>
<span style="font-weight:bold;">IF</span> <span style="color: #333;">first_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">AND</span> <span style="color: #333;">last_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">THEN</span>
<span style="font-weight:bold;">RETURN</span> <span style="font-weight:bold;">CONCAT</span>(<span style="color: #333;">first_name</span><span >,</span> <span style="color: blue;">' '</span><span >,</span> <span style="color: #333;">last_name</span>)<span >;</span>
<span style="font-weight:bold;">ELSEIF</span> <span style="color: #333;">first_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">THEN</span>
<span style="font-weight:bold;">RETURN</span> <span style="color: #333;">first_name</span><span >;</span>
<span style="font-weight:bold;">ELSIF</span> <span style="color: #333;">last_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">THEN</span>
<span style="font-weight:bold;">RETURN</span> <span style="color: #333;">last_name</span><span >;</span>
<span style="font-weight:bold;">ELSE</span>
<span style="font-weight:bold;">RETURN</span> <span style="color: #333;">id</span><span >;</span>
<span style="font-weight:bold;">END</span> <span style="font-weight:bold;">IF</span><span >;</span>
<span style="font-weight:bold;">END</span><span >;</span></pre>
---
<pre style="color: black; background-color: white;"><span style="font-weight:bold;">SELECT</span>
<span style="font-weight:bold;">CASE</span> <span style="font-weight:bold;">WHEN</span> <span style="font-weight:bold;">status</span> <span >=</span> <span style="color: blue;">'active'</span> <span style="font-weight:bold;">AND</span> <span style="color: #333;">priority</span> <span >=</span> <span style="color: blue;">'high'</span> <span style="font-weight:bold;">THEN</span>
<span style="color: blue;">'urgent'</span>
<span style="font-weight:bold;">WHEN</span> <span style="font-weight:bold;">status</span> <span >=</span> <span style="color: blue;">'active'</span> <span style="font-weight:bold;">OR</span> <span style="font-weight:bold;">status</span> <span >=</span> <span style="color: blue;">'pending'</span> <span style="font-weight:bold;">THEN</span>
<span style="color: blue;">'normal'</span>
<span style="font-weight:bold;">ELSE</span>
<span style="color: blue;">'low'</span>
<span style="font-weight:bold;">END</span> <span style="font-weight:bold;">AS</span> <span style="color: #333;">task_priority</span>
<span style="font-weight:bold;">FROM</span>
<span style="color: #333;">tasks</span><span >;</span></pre>
23 changes: 23 additions & 0 deletions tests/format.txt
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Expand Up @@ -1203,3 +1203,26 @@ WHERE
CREATE TABLE t (
c VARCHAR(20)
) DEFAULT CHARACTER SET utf8mb4 ENGINE = InnoDB
---
BEGIN
IF first_name != '' AND last_name != '' THEN
RETURN CONCAT(first_name, ' ', last_name);
ELSEIF first_name != '' THEN
RETURN first_name;
ELSIF last_name != '' THEN
RETURN last_name;
ELSE
RETURN id;
END IF;
END;
---
SELECT
CASE WHEN status = 'active' AND priority = 'high' THEN
'urgent'
WHEN status = 'active' OR status = 'pending' THEN
'normal'
ELSE
'low'
END AS task_priority
FROM
tasks;
4 changes: 4 additions & 0 deletions tests/highlight.html
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Expand Up @@ -425,3 +425,7 @@
<span style="font-weight:bold;">WHERE</span> <span style="color: #333;">t</span><span >.</span><span style="color: #333;">start</span> <span >=</span> <span style="color: #333;">t</span><span >.</span><span style="color: #333;">end</span></pre>
---
<pre style="color: black; background-color: white;"><span style="font-weight:bold;">CREATE</span> <span style="font-weight:bold;">TABLE</span> <span style="color: #333;">t</span> (<span style="color: #333;">c</span> <span style="font-weight:bold;">VARCHAR</span>(<span style="color: green;">20</span>)) <span style="font-weight:bold;">DEFAULT</span> <span style="font-weight:bold;">CHARACTER</span> <span style="font-weight:bold;">SET</span> <span style="color: #333;">utf8mb4</span> <span style="font-weight:bold;">ENGINE</span> <span >=</span> <span style="color: #333;">InnoDB</span></pre>
---
<pre style="color: black; background-color: white;"><span style="font-weight:bold;">BEGIN</span> <span style="font-weight:bold;">IF</span> <span style="color: #333;">first_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">AND</span> <span style="color: #333;">last_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">THEN</span> <span style="font-weight:bold;">RETURN</span> <span style="font-weight:bold;">CONCAT</span>(<span style="color: #333;">first_name</span><span >,</span> <span style="color: blue;">' '</span><span >,</span> <span style="color: #333;">last_name</span>)<span >;</span> <span style="font-weight:bold;">ELSEIF</span> <span style="color: #333;">first_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">THEN</span> <span style="font-weight:bold;">RETURN</span> <span style="color: #333;">first_name</span><span >;</span> <span style="font-weight:bold;">ELSIF</span> <span style="color: #333;">last_name</span> <span >!</span><span >=</span> <span style="color: blue;">''</span> <span style="font-weight:bold;">THEN</span> <span style="font-weight:bold;">RETURN</span> <span style="color: #333;">last_name</span><span >;</span> <span style="font-weight:bold;">ELSE</span> <span style="font-weight:bold;">RETURN</span> <span style="color: #333;">id</span><span >;</span> <span style="font-weight:bold;">END</span> <span style="font-weight:bold;">IF</span><span >;</span> <span style="font-weight:bold;">END</span><span >;</span></pre>
---
<pre style="color: black; background-color: white;"><span style="font-weight:bold;">SELECT</span> <span style="font-weight:bold;">CASE</span> <span style="font-weight:bold;">WHEN</span> <span style="font-weight:bold;">status</span> <span >=</span> <span style="color: blue;">'active'</span> <span style="font-weight:bold;">AND</span> <span style="color: #333;">priority</span> <span >=</span> <span style="color: blue;">'high'</span> <span style="font-weight:bold;">THEN</span> <span style="color: blue;">'urgent'</span> <span style="font-weight:bold;">WHEN</span> <span style="font-weight:bold;">status</span> <span >=</span> <span style="color: blue;">'active'</span> <span style="font-weight:bold;">OR</span> <span style="font-weight:bold;">status</span> <span >=</span> <span style="color: blue;">'pending'</span> <span style="font-weight:bold;">THEN</span> <span style="color: blue;">'normal'</span> <span style="font-weight:bold;">ELSE</span> <span style="color: blue;">'low'</span> <span style="font-weight:bold;">END</span> <span style="font-weight:bold;">AS</span> <span style="color: #333;">task_priority</span> <span style="font-weight:bold;">FROM</span> <span style="color: #333;">tasks</span><span >;</span></pre>
4 changes: 4 additions & 0 deletions tests/sql.sql
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Expand Up @@ -425,3 +425,7 @@ FROM t
WHERE t.start = t.end
---
CREATE TABLE t (c VARCHAR(20)) DEFAULT CHARACTER SET utf8mb4 ENGINE = InnoDB
---
BEGIN IF first_name != '' AND last_name != '' THEN RETURN CONCAT(first_name, ' ', last_name); ELSEIF first_name != '' THEN RETURN first_name; ELSIF last_name != '' THEN RETURN last_name; ELSE RETURN id; END IF; END;
---
SELECT CASE WHEN status = 'active' AND priority = 'high' THEN 'urgent' WHEN status = 'active' OR status = 'pending' THEN 'normal' ELSE 'low' END AS task_priority FROM tasks;