compengine,comprules: API rename

The API `AtWord()` was hiding its true purpose, it returns true also
when the cursor is in the middle of whitespace following a word.

This change renames the method accordingly to
`AtWordOrInSpaceFollowingWord()`.

Release note: None

pkg/sql/compengine/api.go

@@ -71,9 +71,11 @@ type Context interface {
 	// returned.
 	RelToken(pos int) scanner.InspectToken
 
-	// AtWord is equivalent to .RelMarker(0) == MarkIdentOrKeyword,
-	// and is provided for convenience.
-	AtWord() bool
+	// AtWordOrInSpaceFollowingWord is equivalent to .RelMarker(0) ==
+	// MarkIdentOrKeyword, and is provided for convenience. This returns
+	// true both when the cursor is _on_ an identifier/keyword, or _at
+	// any whitespace position afterwards_.
+	AtWordOrInSpaceFollowingWord() bool
 
 	// Query perform a SQL query.
 	Query(ctx context.Context, query string, args ...interface{}) (Rows, error)

pkg/sql/compengine/engine.go

@@ -221,8 +221,8 @@ func (c *completions) RelToken(idx int) scanner.InspectToken {
 	return c.tokens[off]
 }
 
-// AtWord implements the Context interface.
-func (c *completions) AtWord() bool {
+// AtWordOrInSpaceFollowingWord implements the Context interface.
+func (c *completions) AtWordOrInSpaceFollowingWord() bool {
 	return c.RelMarker(0) == MarkIdentOrKeyword
 }
 

pkg/sql/comprules/rules.go

@@ -67,7 +67,7 @@ func completeKeyword(ctx context.Context, c compengine.Context) (compengine.Rows
 		start = c.QueryPos()
 		end = start
 
-	case c.AtWord() && !curTok.Quoted:
+	case c.AtWordOrInSpaceFollowingWord() && !curTok.Quoted:
 		prefix = curTok.Str
 		start = int(curTok.Start)
 		end = int(curTok.End)
@@ -107,7 +107,7 @@ func completeFunction(ctx context.Context, c compengine.Context) (compengine.Row
 	var prefix string
 	var start, end int
 	var schemaName string
-	atWord := c.AtWord()
+	atWord := c.AtWordOrInSpaceFollowingWord()
 	sketch := c.Sketch()
 	switch {
 	case compMaybeQualProcRe.MatchString(sketch):
@@ -183,7 +183,7 @@ func completeDatabase(ctx context.Context, c compengine.Context) (compengine.Row
 		c.Trace("not completing")
 		return nil, nil
 
-	case c.CursorInToken() && c.AtWord():
+	case c.CursorInToken() && c.AtWordOrInSpaceFollowingWord():
 		curTok := c.RelToken(0)
 		prefix = curTok.Str
 		start = int(curTok.Start)
@@ -225,7 +225,7 @@ func completeObjectInCurrentDatabase(
 	ctx context.Context, c compengine.Context,
 ) (compengine.Rows, error) {
 	var schema string
-	atWord := c.AtWord()
+	atWord := c.AtWordOrInSpaceFollowingWord()
 	sketch := c.Sketch()
 	hasSchemaPrefix := false
 	switch {
@@ -300,7 +300,7 @@ func completeSchemaInCurrentDatabase(
 	var prefix string
 	var start, end int
 	switch {
-	case c.CursorInToken() && c.AtWord():
+	case c.CursorInToken() && c.AtWordOrInSpaceFollowingWord():
 		curTok := c.RelToken(0)
 		prefix = curTok.Str
 		start = int(curTok.Start)
@@ -331,7 +331,7 @@ func completeSchemaInOtherDatabase(
 	ctx context.Context, c compengine.Context,
 ) (compengine.Rows, error) {
 	var dbname string
-	atWord := c.AtWord()
+	atWord := c.AtWordOrInSpaceFollowingWord()
 	switch {
 	case compOneQualPrefixRe.MatchString(c.Sketch()):
 		dbTok := c.RelToken(-1)
@@ -385,7 +385,7 @@ func completeObjectInOtherDatabase(
 	ctx context.Context, c compengine.Context,
 ) (compengine.Rows, error) {
 	var schema string
-	atWord := c.AtWord()
+	atWord := c.AtWordOrInSpaceFollowingWord()
 	sketch := c.Sketch()
 	var dbTok scanner.InspectToken
 	switch {