Fix search-replace for tables with composite primary keys (#183)

* Add testing for multikey tables

* Fix SQL syntax error in precise/regex replacement

* Stop skipping rows within multikey tables

Author: brandonpayton

features/search-replace.feature

@@ -1163,20 +1163,29 @@ Feature: Do global search/replace
         index=`expr $index + 1`
       done
         echo "('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc');" >> test_db.sql
+      echo "CREATE TABLE \`wp_123_test_multikey\` (\`key1\` INT(5) UNSIGNED NOT NULL AUTO_INCREMENT, \`key2\` INT(5) UNSIGNED NOT NULL, \`key3\` INT(5) UNSIGNED NOT NULL, \`text\` TEXT, PRIMARY KEY (\`key1\`,\`key2\`,\`key3\`) );" >> test_db.sql
+      echo "INSERT INTO \`wp_123_test_multikey\` (\`key2\`,\`key3\`,\`text\`) VALUES" >> test_db.sql
+      index=1
+      while [[ $index -le 204 ]];
+      do
+        echo "(0,0,'abc'),(1,1,'abc'),(2,2,'abc'),(3,3,'abc'),(4,4,'abc'),(5,0,'abc'),(6,1,'abc'),(7,2,'abc'),(8,3,'abc'),(9,4,'abc')," >> test_db.sql
+        index=`expr $index + 1`
+      done
+        echo "(0,0,'abc'),(1,1,'abc'),(2,2,'abc'),(3,3,'abc'),(4,4,'abc'),(5,0,'abc'),(6,1,'abc'),(7,2,'abc'),(8,3,'abc'),(9,4,'abc');" >> test_db.sql
       """
     And I run `bash create_sql_file.sh`
     And I run `wp db query "SOURCE test_db.sql;"`
 
     When I run `wp search-replace --dry-run 'abc' 'def' --all-tables-with-prefix --skip-columns=guid,domain --precise`
     Then STDOUT should contain:
       """
-      Success: 2000 replacements to be made.
+      Success: 4050 replacements to be made.
       """
 
     When I run `wp search-replace 'abc' 'def' --all-tables-with-prefix --skip-columns=guid,domain --precise`
     Then STDOUT should contain:
       """
-      Success: Made 2000 replacements.
+      Success: Made 4050 replacements.
       """
 
     When I run `wp search-replace --dry-run 'abc' 'def' --all-tables-with-prefix --skip-columns=guid,domain --precise`
@@ -1205,20 +1214,29 @@ Feature: Do global search/replace
         index=`expr $index + 1`
       done
         echo "('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc'),('abc');" >> test_db.sql
+      echo "CREATE TABLE \`wp_123_test_multikey\` (\`key1\` INT(5) UNSIGNED NOT NULL AUTO_INCREMENT, \`key2\` INT(5) UNSIGNED NOT NULL, \`key3\` INT(5) UNSIGNED NOT NULL, \`text\` TEXT, PRIMARY KEY (\`key1\`,\`key2\`,\`key3\`) );" >> test_db.sql
+      echo "INSERT INTO \`wp_123_test_multikey\` (\`key2\`,\`key3\`,\`text\`) VALUES" >> test_db.sql
+      index=1
+      while [[ $index -le 204 ]];
+      do
+        echo "(0,0,'abc'),(1,1,'abc'),(2,2,'abc'),(3,3,'abc'),(4,4,'abc'),(5,0,'abc'),(6,1,'abc'),(7,2,'abc'),(8,3,'abc'),(9,4,'abc')," >> test_db.sql
+        index=`expr $index + 1`
+      done
+        echo "(0,0,'abc'),(1,1,'abc'),(2,2,'abc'),(3,3,'abc'),(4,4,'abc'),(5,0,'abc'),(6,1,'abc'),(7,2,'abc'),(8,3,'abc'),(9,4,'abc');" >> test_db.sql
       """
     And I run `bash create_sql_file.sh`
     And I run `wp db query "SOURCE test_db.sql;"`
 
     When I run `wp search-replace --dry-run 'abc' 'def' --all-tables-with-prefix --skip-columns=guid,domain --regex`
     Then STDOUT should contain:
       """
-      Success: 2000 replacements to be made.
+      Success: 4050 replacements to be made.
       """
 
     When I run `wp search-replace 'abc' 'def' --all-tables-with-prefix --skip-columns=guid,domain --regex`
     Then STDOUT should contain:
       """
-      Success: Made 2000 replacements.
+      Success: Made 4050 replacements.
       """
 
     When I run `wp search-replace --dry-run 'abc' 'def' --all-tables-with-prefix --skip-columns=guid,domain --regex`

src/Search_Replace_Command.php

@@ -604,15 +604,37 @@ static function ( $key ) {
 			// Because we are ordering by primary keys from least to greatest,
 			// we can exclude previous chunks from consideration by adding greater-than conditions
 			// to insist the next chunk's keys must be greater than the last of this chunk's keys.
-			$last_keys            = end( $rows );
+			$last_row            = end( $rows );
+			$next_key_conditions = array();
+
+			// NOTE: For a composite key (X, Y, Z), selecting the next rows requires the following conditions:
+			// ( X = lastX AND Y = lastY AND Z > lastZ ) OR
+			// ( X = lastX AND Y > lastY ) OR
+			// ( X > lastX )
+			for ( $last_key_index = count( $primary_keys ) - 1; $last_key_index >= 0; $last_key_index-- ) {
+				$next_key_subconditions = array();
+
+				for ( $i = 0; $i <= $last_key_index; $i++ ) {
+					$k = $primary_keys[ $i ];
+					$v = $last_row->{ $k };
+
+					if ( $i < $last_key_index ) {
+						$next_key_subconditions[] = self::esc_sql_ident( $k ) . ' = ' . self::esc_sql_value( $v );
+					} else {
+						$next_key_subconditions[] = self::esc_sql_ident( $k ) . ' > ' . self::esc_sql_value( $v );
+					}
+				}
+
+				$next_key_conditions[] = '( ' . implode( ' AND ', $next_key_subconditions ) . ' )';
+			}
+
 			$where_key_conditions = array();
 			if ( $base_key_condition ) {
 				$where_key_conditions[] = $base_key_condition;
 			}
-			foreach ( (array) $last_keys as $k => $v ) {
-				$where_key_conditions[] = self::esc_sql_ident( $k ) . ' > ' . self::esc_sql_value( $v );
-			}
-			$where_key = 'WHERE ' . implode( 'AND', $where_key_conditions );
+			$where_key_conditions[] = '( ' . implode( ' OR ', $next_key_conditions ) . ' )';
+
+			$where_key = 'WHERE ' . implode( ' AND ', $where_key_conditions );
 		}
 
 		if ( $this->verbose && 'table' === $this->format ) {