[DATABASE][PostgreSQL] Add fulltext search support
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@ -152,6 +152,15 @@ class PgsqlSchema extends Schema
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case 'unique':
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$def['unique keys'][$key_name] = $cols;
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break;
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case 'gin':
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// @fixme Way too magical.
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$cols = array_values(preg_grep(
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'/^(.+(\(|\)).+|\s*)$/',
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preg_split('(COALESCE\(|,)', $cols[0]),
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PREG_GREP_INVERT
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));
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$def['fulltext indexes'][$key_name] = $cols;
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break;
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default:
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$def['indexes'][$key_name] = $cols;
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}
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@ -211,7 +220,12 @@ class PgsqlSchema extends Schema
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WHEN "idx"."indisunique" IS TRUE THEN 'unique'
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ELSE "am"."amname"
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END AS "key_type",
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"cols"."attname" AS "col"
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CASE
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WHEN "cols"."attname" IS NOT NULL THEN "cols"."attname"
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ELSE pg_get_indexdef("idx"."indexrelid",
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CAST("col_nums"."pos" AS INTEGER),
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TRUE)
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END AS "col"
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FROM pg_index AS "idx"
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CROSS JOIN LATERAL unnest("idx"."indkey")
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WITH ORDINALITY AS "col_nums" ("num", "pos")
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@ -377,6 +391,24 @@ class PgsqlSchema extends Schema
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$phrase[] = 'DROP CONSTRAINT ' . $this->quoteIdentifier($tableName . '_pkey');
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}
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public function buildFulltextIndexList($table, array $def)
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{
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foreach ($def as &$val) {
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$cols[] = $this->buildFulltextIndexItem($table, $val);
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}
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return "(to_tsvector('english', " . implode(" || ' ' || ", $cols) . '))';
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}
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public function buildFulltextIndexItem($table, $def)
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{
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return sprintf(
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"COALESCE(%s.%s, '')",
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$this->quoteIdentifier($table),
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$def
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);
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}
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public function mapType($column)
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{
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$map = [
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@ -407,6 +439,21 @@ class PgsqlSchema extends Schema
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return $type;
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}
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/**
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* Append an SQL statement with an index definition for a full-text search
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* index over one or more columns on a table.
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*
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* @param array $statements
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* @param string $table
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* @param string $name
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* @param array $def
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*/
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public function appendCreateFulltextIndex(array &$statements, $table, $name, array $def)
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{
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$statements[] = "CREATE INDEX {$name} ON {$table} USING gin "
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. $this->buildFulltextIndexList($table, $def);
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}
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/**
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* Filter the given table definition array to match features available
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* in this database.
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@ -78,7 +78,7 @@ class PostgreSQLSearch extends SearchEngine
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$cols = implode(" || ' ' || ", array_map(
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function ($col) {
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return sprintf(
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"COALESCE(%s.%s, '')",
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'COALESCE(%s."%s", \'\')',
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common_database_tablename($this->table),
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$col
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);
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@ -87,7 +87,7 @@ class PostgreSQLSearch extends SearchEngine
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));
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$this->target->whereAdd(sprintf(
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'to_tsvector(\'english\', %2$s) @@ plainto_tsquery(\'%1$s\')',
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'to_tsvector(\'english\', %2$s) @@ websearch_to_tsquery(\'%1$s\')',
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$this->target->escape($q, true),
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$cols
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));
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@ -97,7 +97,7 @@ class PostgreSQLSearch extends SearchEngine
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$this->target->whereAdd('notice.is_local <> ' . Notice::GATEWAY);
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$this->target->whereAdd(sprintf(
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'to_tsvector(\'english\', content) @@ plainto_tsquery(\'%1$s\')',
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'to_tsvector(\'english\', "content") @@ websearch_to_tsquery(\'%1$s\')',
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$this->target->escape($q, true)
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));
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return true;
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