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Showing content from https://www.yiiframework.com/doc/api/2.0/yii-db-pgsql-arrayexpressionbuilder below:

ArrayExpressionBuilder, yii\db\pgsql\ArrayExpressionBuilder | API Documentation for Yii 2.0

Class ArrayExpressionBuilder builds yii\db\ArrayExpression for PostgreSQL DBMS.

Hide inherited methods

Source code

                public function __construct(QueryBuilder $queryBuilder)
{
    $this->queryBuilder = $queryBuilder;
}

            

Method builds the raw SQL from the $expression that will not be additionally escaped or quoted.

Source code

                public function build(ExpressionInterface $expression, array &$params = [])
{
    $value = $expression->getValue();
    if ($value === null) {
        return 'NULL';
    }
    if ($value instanceof Query) {
        list ($sql, $params) = $this->queryBuilder->build($value, $params);
        return $this->buildSubqueryArray($sql, $expression);
    }
    $placeholders = $this->buildPlaceholders($expression, $params);
    return 'ARRAY[' . implode(', ', $placeholders) . ']' . $this->getTypehint($expression);
}

            

Builds placeholders array out of $expression values

Source code

                protected function buildPlaceholders(ExpressionInterface $expression, &$params)
{
    $value = $expression->getValue();
    $placeholders = [];
    if ($value === null || !is_array($value) && !$value instanceof \Traversable) {
        return $placeholders;
    }
    if ($expression->getDimension() > 1) {
        foreach ($value as $item) {
            $placeholders[] = $this->build($this->unnestArrayExpression($expression, $item), $params);
        }
        return $placeholders;
    }
    foreach ($value as $item) {
        if ($item instanceof Query) {
            list ($sql, $params) = $this->queryBuilder->build($item, $params);
            $placeholders[] = $this->buildSubqueryArray($sql, $expression);
            continue;
        }
        $item = $this->typecastValue($expression, $item);
        if ($item instanceof ExpressionInterface) {
            $placeholders[] = $this->queryBuilder->buildExpression($item, $params);
            continue;
        }
        $placeholders[] = $this->queryBuilder->bindParam($item, $params);
    }
    return $placeholders;
}

            

Build an array expression from a subquery SQL.

Source code

                protected function buildSubqueryArray($sql, ArrayExpression $expression)
{
    return 'ARRAY(' . $sql . ')' . $this->getTypehint($expression);
}

            

Source code

                protected function getTypehint(ArrayExpression $expression)
{
    if ($expression->getType() === null) {
        return '';
    }
    $result = '::' . $expression->getType();
    $result .= str_repeat('[]', $expression->getDimension());
    return $result;
}

            

Casts $value to use in $expression

Source code

                protected function typecastValue(ArrayExpression $expression, $value)
{
    if ($value instanceof ExpressionInterface) {
        return $value;
    }
    if (in_array($expression->getType(), [Schema::TYPE_JSON, Schema::TYPE_JSONB], true)) {
        return new JsonExpression($value);
    }
    return $value;
}

            

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