o 8Di @sVddlmZddlZddlmZddlmZdZddZ dd Z d d Z dddZ dS)) annotationsN)exp)tsort)onsidekindusingmethodc Cs&|tjD]}i}g}|jdgD]!}t|}|r,|D] }||g|g||<qq||j|fq|D]P\}}||gD]E}|jd} t| tj rt t|dkrWqAt | } | D]&} |t | vr| ttj|jd| g| dd} |j| dddq_qAq7qt|}t|}|S)aM Removes cross joins if possible and reorder joins based on predicate dependencies. Example: >>> from sqlglot import parse_one >>> optimize_joins(parse_one("SELECT * FROM x CROSS JOIN y JOIN z ON x.a = z.a AND y.a = z.a")).sql() 'SELECT * FROM x JOIN z ON x.a = z.a AND TRUE JOIN y ON y.a = z.a' joinsrF)copy)appendr )find_allrSelectargsgetother_table_namesr alias_or_name isinstance Connectorlentypeflattencolumn_table_namesreplacetrue_combiner reorder_joins normalize) expressionselect references cross_joinsjointablestablenamedeproperator predicater*Y/var/www/Datamplify/venv/lib/python3.10/site-packages/sqlglot/optimizer/optimize_joins.pyoptimize_joins s<     r,csf|tjD]*j}dd|jdgDddD}|dfddt|Dq|S)zP Reorder joins by topological sort order based on predicate references. cSsi|]}|j|qSr*r).0r#r*r*r+ >sz!reorder_joins..r cSsi|] \}}|t|qSr*)r)r.r&r#r*r*r+r/?scs&g|]}|jkr|vr|qSr*r-)r.r&from_r r*r+ Bs&z!reorder_joins..) rrFromparentrritemssetr)rr4dagr*r0r+r8srcs|tjD]9tfddtDsddjdkr%ddqddjds?jds?dt q|S)zA Remove INNER and OUTER from joins as they are optional. c3s|] }j|VqdS)N)rr)r.kr#r*r+ Lsznormalize..rCROSSrNr) rrJoinany JOIN_ATTRSr6rrrr)rr*r9r+rGs   rr#exp.Joinreturn t.Set[str]cCs$|jd}|rt||jStS)Nr)rrrrrr6)r#rr*r*r+rYs r)r#r?r@rA) __future__rtypingtsqlglotrsqlglot.helperrr>r,rrrr*r*r*r+s   -