1 files changed, 106 insertions, 0 deletions
diff --git a/lib/private/DB/QueryBuilder/ExpressionBuilder/OCIExpressionBuilder.php b/lib/private/DB/QueryBuilder/ExpressionBuilder/OCIExpressionBuilder.php
new file mode 100644
index 00000000000..542e8d62ede
--- /dev/null
+++ b/lib/private/DB/QueryBuilder/ExpressionBuilder/OCIExpressionBuilder.php
@@ -0,0 +1,106 @@
+<?php
+
+/**
+ * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+namespace OC\DB\QueryBuilder\ExpressionBuilder;
+
+use OC\DB\QueryBuilder\QueryFunction;
+use OCP\DB\QueryBuilder\ILiteral;
+use OCP\DB\QueryBuilder\IParameter;
+use OCP\DB\QueryBuilder\IQueryBuilder;
+use OCP\DB\QueryBuilder\IQueryFunction;
+
+class OCIExpressionBuilder extends ExpressionBuilder {
+	/**
+	 * @param mixed $column
+	 * @param mixed|null $type
+	 * @return array|IQueryFunction|string
+	 */
+	protected function prepareColumn($column, $type) {
+		if ($type === IQueryBuilder::PARAM_STR && !is_array($column) && !($column instanceof IParameter) && !($column instanceof ILiteral)) {
+			$column = $this->castColumn($column, $type);
+		}
+
+		return parent::prepareColumn($column, $type);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function in($x, $y, $type = null): string {
+		$x = $this->prepareColumn($x, $type);
+		$y = $this->prepareColumn($y, $type);
+
+		return $this->expressionBuilder->in($x, $y);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function notIn($x, $y, $type = null): string {
+		$x = $this->prepareColumn($x, $type);
+		$y = $this->prepareColumn($y, $type);
+
+		return $this->expressionBuilder->notIn($x, $y);
+	}
+
+	/**
+	 * Creates a $x = '' statement, because Oracle needs a different check
+	 *
+	 * @param string|ILiteral|IParameter|IQueryFunction $x The field in string format to be inspected by the comparison.
+	 * @return string
+	 * @since 13.0.0
+	 */
+	public function emptyString($x): string {
+		return $this->isNull($x);
+	}
+
+	/**
+	 * Creates a `$x <> ''` statement, because Oracle needs a different check
+	 *
+	 * @param string|ILiteral|IParameter|IQueryFunction $x The field in string format to be inspected by the comparison.
+	 * @return string
+	 * @since 13.0.0
+	 */
+	public function nonEmptyString($x): string {
+		return $this->isNotNull($x);
+	}
+
+	/**
+	 * Returns a IQueryFunction that casts the column to the given type
+	 *
+	 * @param string|IQueryFunction $column
+	 * @param mixed $type One of IQueryBuilder::PARAM_*
+	 * @psalm-param IQueryBuilder::PARAM_* $type
+	 * @return IQueryFunction
+	 */
+	public function castColumn($column, $type): IQueryFunction {
+		if ($type === IQueryBuilder::PARAM_STR) {
+			$column = $this->helper->quoteColumnName($column);
+			return new QueryFunction('to_char(' . $column . ')');
+		}
+		if ($type === IQueryBuilder::PARAM_INT) {
+			$column = $this->helper->quoteColumnName($column);
+			return new QueryFunction('to_number(to_char(' . $column . '))');
+		}
+
+		return parent::castColumn($column, $type);
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function like($x, $y, $type = null): string {
+		return parent::like($x, $y, $type) . " ESCAPE '\\'";
+	}
+
+	/**
+	 * @inheritdoc
+	 */
+	public function iLike($x, $y, $type = null): string {
+		return $this->like($this->functionBuilder->lower($x), $this->functionBuilder->lower($y));
+	}
+}