parsing insert statement
This commit is contained in:
GotPPay
74
Untitled-2
Normal file
74
Untitled-2
Normal file
@@ -0,0 +1,74 @@
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INSERT INTO suppliers
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(supplier_id, supplier_name)
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VALUES
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(5000, 'Apple');
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[@0,0:5='INSERT',<663>,1:0]
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[@1,7:10='INTO',<685>,1:7]
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[@2,12:20='suppliers',<2242>,1:12]
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[@3,22:22='(',<2213>,2:0]
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[@4,23:33='supplier_id',<2242>,2:1]
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[@5,34:34=',',<2219>,2:12]
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[@6,36:48='supplier_name',<2242>,2:14]
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[@7,49:49=')',<2214>,2:27]
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[@8,51:56='VALUES',<2064>,3:0]
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[@9,58:58='(',<2213>,4:0]
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[@10,59:62='5000',<2207>,4:1]
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[@11,63:63=',',<2219>,4:5]
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[@12,65:71=''Apple'',<2209>,4:7]
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[@13,72:72=')',<2214>,4:14]
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[@14,73:73=';',<2231>,4:15]
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[@15,75:74='<EOF>',<-1>,5:0]
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====================================================
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INSERT INTO suppliers
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(supplier_id, supplier_name)
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SELECT (account_no, name)
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FROM customers
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WHERE customer_id > 5000;
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[@0,0:5='INSERT',<663>,1:0]
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[@1,7:10='INTO',<685>,1:7]
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[@2,12:20='suppliers',<2242>,1:12]
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[@3,22:22='(',<2213>,2:0]
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[@4,23:33='supplier_id',<2242>,2:1]
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[@5,34:34=',',<2219>,2:12]
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[@6,36:48='supplier_name',<2242>,2:14]
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[@7,49:49=')',<2214>,2:27]
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[@8,51:56='SELECT',<1482>,3:0]
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[@9,58:67='account_no',<2242>,3:7]
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[@10,68:68=',',<2219>,3:17]
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[@11,70:73='name',<873>,3:19]
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[@12,75:78='FROM',<548>,4:0]
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[@13,80:88='customers',<2242>,4:5]
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[@14,90:94='WHERE',<2105>,5:0]
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[@15,96:106='customer_id',<2242>,5:6]
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[@16,108:108='>',<2228>,5:18]
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[@17,110:113='5000',<2207>,5:20]
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[@18,114:114=';',<2231>,5:24]
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[@19,116:115='<EOF>',<-1>,6:0]
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=============================================================
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UPDATE customers
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SET state = 'California',
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customer_rep = 32
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WHERE customer_id > 100;
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[@0,0:5='UPDATE',<2016>,1:0]
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[@1,7:15='customers',<2242>,1:7]
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[@2,17:19='SET',<1501>,2:0]
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[@3,21:25='state',<1566>,2:4]
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[@4,27:27='=',<2233>,2:10]
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[@5,29:40=''California'',<2209>,2:12]
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[@6,41:41=',',<2219>,2:24]
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[@7,47:58='customer_rep',<2242>,3:4]
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[@8,60:60='=',<2233>,3:17]
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[@9,62:63='32',<2207>,3:19]
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[@10,65:69='WHERE',<2105>,4:0]
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[@11,71:81='customer_id',<2242>,4:6]
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[@12,83:83='>',<2228>,4:18]
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[@13,85:87='100',<2207>,4:20]
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[@14,88:88=';',<2231>,4:23]
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[@15,90:89='<EOF>',<-1>,5:0]
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@@ -1,4 +1,7 @@
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INSERT INTO suppliers
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INSERT INTO clients
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(supplier_id, supplier_name)
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(client_id, client_name, client_type)
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VALUES
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SELECT 10345, 'IBM', 'advertising'
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(5000, 'Apple');
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FROM dual
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WHERE NOT EXISTS (SELECT *
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FROM clients
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WHERE clients.client_id = 10345);
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1
my-notes
1
my-notes
@@ -76,3 +76,4 @@ ar rcs antlr-library.a antlr-library.o
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Note :
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Note :
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Should link with runtime library staticly
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Should link with runtime library staticly
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271
wrapper.rb
271
wrapper.rb
@@ -4,5 +4,274 @@ require ('fiddle')
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#antlr = Fiddle.dlopen('mylib.so')
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#antlr = Fiddle.dlopen('mylib.so')
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input = "(sql_script (unit_statement (data_manipulation_language_statements (insert_statement INSERT (single_table_insert (insert_into_clause INTO (general_table_ref (dml_table_expression_clause (tableview_name (identifier (id_expression (regular_id suppliers)))))) (paren_column_list ( (column_list (column_name (identifier (id_expression (regular_id supplier_id)))) , (column_name (identifier (id_expression (regular_id supplier_name))))) ))) (values_clause VALUES ( (expressions (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (numeric 5000))))))))))) , (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (quoted_string 'Apple')))))))))))) )))))) ; <EOF>)"
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#input_string = "(sql_script (unit_statement (data_manipulation_language_statements (insert_statement INSERT (single_table_insert (insert_into_clause INTO (general_table_ref (dml_table_expression_clause (tableview_name (identifier (id_expression (regular_id suppliers)))))) (paren_column_list ( (column_list (column_name (identifier (id_expression (regular_id supplier_id)))) , (column_name (identifier (id_expression (regular_id supplier_name))))) ))) (values_clause VALUES ( (expressions (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (numeric 5000))))))))))) , (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (quoted_string 'Apple')))))))))))) )))))) ; <EOF>)"
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#input_string = "(sql_script (unit_statement (data_manipulation_language_statements (insert_statement INSERT (single_table_insert (insert_into_clause INTO (general_table_ref (dml_table_expression_clause (tableview_name (identifier (id_expression (regular_id suppliers)))))) (paren_column_list ( (column_list (column_name (identifier (id_expression (regular_id supplier_id)))) , (column_name (identifier (id_expression (regular_id supplier_name))))) ))) (select_statement (subquery (subquery_basic_elements (query_block SELECT (selected_element (select_list_elements (expressions (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id account_no))))))))))))) , (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id (non_reserved_keywords_pre12c name))))))))))))))))) (from_clause FROM (table_ref_list (table_ref (table_ref_aux (table_ref_aux_internal (dml_table_expression_clause (tableview_name (identifier (id_expression (regular_id customers)))))))))) (where_clause WHERE (expression (logical_expression (multiset_expression (relational_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id customer_id)))))))))) (relational_operator >) (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (numeric 5000))))))))))))))))))))) ; <EOF>)"
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#input_string = "(sql_script (unit_statement (data_manipulation_language_statements (update_statement UPDATE (general_table_ref (dml_table_expression_clause (tableview_name (identifier (id_expression (regular_id customers)))))) (update_set_clause SET (column_based_update_set_clause (column_name (identifier (id_expression (regular_id last_name)))) = (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (quoted_string 'Anderson'))))))))))))) (where_clause WHERE (expression (logical_expression (multiset_expression (relational_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id customer_id)))))))))) (relational_operator =) (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (numeric 5000)))))))))))))))) ; <EOF>)"
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#input_string = "(sql_script (unit_statement (data_manipulation_language_statements (insert_statement INSERT (single_table_insert (insert_into_clause INTO (general_table_ref (dml_table_expression_clause (tableview_name (identifier (id_expression (regular_id suppliers)))))) (paren_column_list ( (column_list (column_name (identifier (id_expression (regular_id supplier_id)))) , (column_name (identifier (id_expression (regular_id supplier_name))))) ))) (select_statement (subquery (subquery_basic_elements (query_block SELECT (selected_element (select_list_elements (expressions (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id account_no))))))))))))) , (expression (logical_expression (multiset_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id (non_reserved_keywords_pre12c name))))))))))))))))) (from_clause FROM (table_ref_list (table_ref (table_ref_aux (table_ref_aux_internal (dml_table_expression_clause (tableview_name (identifier (id_expression (regular_id customers)))))))))) (where_clause WHERE (expression (logical_expression (logical_expression (multiset_expression (relational_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id customer_id)))))))))) (relational_operator >) (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (numeric 5000))))))))))) and (logical_expression (multiset_expression (relational_expression (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (general_element (general_element_part (id_expression (regular_id customer_name)))))))))) (relational_operator <>) (relational_expression (compound_expression (concatenation (model_expression (unary_expression (atom (constant (quoted_string 'john')))))))))))))))))))))) ; <EOF>)"
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#input_string = "[@0,0:5='INSERT',<663>,1:0]\n[@1,7:10='INTO',<685>,1:7]\n[@2,12:20='suppliers',<2242>,1:12]\n[@3,22:22='(',<2213>,2:0]\n[@4,23:33='supplier_id',<2242>,2:1]\n[@5,34:34=',',<2219>,2:12]\n[@6,36:48='supplier_name',<2242>,2:14]\n[@7,49:49=')',<2214>,2:27]\n[@8,51:56='VALUES',<2064>,3:0]\n[@9,58:58='(',<2213>,4:0]\n[@10,59:62='5000',<2207>,4:1]\n[@11,63:63=',',<2219>,4:5]\n[@12,65:71=''Apple'',<2209>,4:7]\n[@13,72:72=')',<2214>,4:14]\n[@14,73:73=';',<2231>,4:15]\n[@15,75:74='<EOF>',<-1>,5:0]"
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#input_string = "[@0,0:5='INSERT',<663>,1:0]\n[@1,7:10='INTO',<685>,1:7]\n[@2,12:20='suppliers',<2242>,1:12]\n[@3,22:22='(',<2213>,2:0]\n[@4,23:33='supplier_id',<2242>,2:1]\n[@5,34:34=',',<2219>,2:12]\n[@6,36:48='supplier_name',<2242>,2:14]\n[@7,49:49=')',<2214>,2:27]\n[@8,51:56='SELECT',<1482>,3:0]\n[@9,58:67='account_no',<2242>,3:7]\n[@10,68:68=',',<2219>,3:17]\n[@11,70:73='name',<873>,3:19]\n[@12,75:78='FROM',<548>,4:0]\n[@13,80:88='customers',<2242>,4:5]\n[@14,90:94='WHERE',<2105>,5:0]\n[@15,96:106='customer_id',<2242>,5:6]\n[@16,108:108='>',<2228>,5:18]\n[@17,110:113='5000',<2207>,5:20]\n[@18,114:114=';',<2231>,5:24]\n[@19,116:115='<EOF>',<-1>,6:0]"
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#input_string = "[@0,0:5='INSERT',<663>,1:0]\n[@1,7:10='INTO',<685>,1:7]\n[@2,12:20='suppliers',<2242>,1:12]\n[@3,22:22='(',<2213>,2:0]\n[@4,23:33='supplier_id',<2242>,2:1]\n[@5,34:34=',',<2219>,2:12]\n[@6,36:48='supplier_name',<2242>,2:14]\n[@7,49:49=')',<2214>,2:27]\n[@8,51:56='SELECT',<1482>,3:0]\n[@9,58:58='(',<2213>,3:7]\n[@10,59:68='account_no',<2242>,3:8]\n[@11,69:69=',',<2219>,3:18]\n[@12,71:74='name',<873>,3:20]\n[@13,75:75=')',<2214>,3:24]\n[@14,77:80='FROM',<548>,4:0]\n[@15,82:90='customers',<2242>,4:5]\n[@16,92:96='WHERE',<2105>,5:0]\n[@17,98:108='customer_id',<2242>,5:6]\n[@18,110:110='>',<2228>,5:18]\n[@19,112:115='5000',<2207>,5:20]\n[@20,116:116=';',<2231>,5:24]\n[@21,118:117='<EOF>',<-1>,6:0]"
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#input_string = "[@0,0:5='INSERT',<663>,1:0]\n[@1,7:10='INTO',<685>,1:7]\n[@2,12:20='suppliers',<2242>,1:12]\n[@3,22:22='(',<2213>,2:0]\n[@4,23:33='supplier_id',<2242>,2:1]\n[@5,34:34=',',<2219>,2:12]\n[@6,36:48='supplier_name',<2242>,2:14]\n[@7,49:49=')',<2214>,2:27]\n[@8,51:56='SELECT',<1482>,3:0]\n[@9,58:58='(',<2213>,3:7]\n[@10,59:68='account_no',<2242>,3:8]\n[@11,69:69=',',<2219>,3:18]\n[@12,71:74='name',<873>,3:20]\n[@13,75:75=')',<2214>,3:24]\n[@14,77:80='FROM',<548>,4:0]\n[@15,82:90='customers',<2242>,4:5]\n[@16,92:96='WHERE',<2105>,5:0]\n[@17,98:98='(',<2213>,5:6]\n[@18,99:109='customer_id',<2242>,5:7]\n[@19,111:111='>',<2228>,5:19]\n[@20,113:116='5000',<2207>,5:21]\n[@21,117:117=')',<2214>,5:25]\n[@22,118:118=';',<2231>,5:26]\n[@23,120:119='<EOF>',<-1>,6:0]"
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#Problematic input, mixing SELECT statement
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input_string = "[@0,0:5='INSERT',<663>,1:0]\n[@1,7:10='INTO',<685>,1:7]\n[@2,12:18='clients',<2242>,1:12]\n[@3,20:20='(',<2213>,2:0]\n[@4,21:29='client_id',<2242>,2:1]\n[@5,30:30=',',<2219>,2:10]\n[@6,32:42='client_name',<2242>,2:12]\n[@7,43:43=',',<2219>,2:23]\n[@8,45:55='client_type',<2242>,2:25]\n[@9,56:56=')',<2214>,2:36]\n[@10,58:63='SELECT',<1482>,3:0]\n[@11,65:69='10345',<2207>,3:7]\n[@12,70:70=',',<2219>,3:12]\n[@13,72:76=''IBM'',<2209>,3:14]\n[@14,77:77=',',<2219>,3:19]\n[@15,79:91=''advertising'',<2209>,3:21]\n[@16,93:96='FROM',<548>,4:0]\n[@17,98:101='dual',<2242>,4:5]\n[@18,103:107='WHERE',<2105>,5:0]\n[@19,109:111='NOT',<1067>,5:6]\n[@20,113:118='EXISTS',<472>,5:10]\n[@21,120:120='(',<2213>,5:17]\n[@22,121:126='SELECT',<1482>,5:18]\n[@23,128:128='*',<2216>,5:25]\n[@24,148:151='FROM',<548>,6:18]\n[@25,153:159='clients',<2242>,6:23]\n[@26,179:183='WHERE',<2105>,7:18]\n[@27,185:191='clients',<2242>,7:24]\n[@28,192:192='.',<2206>,7:31]\n[@29,193:201='client_id',<2242>,7:32]\n[@30,203:203='=',<2233>,7:42]\n[@31,205:209='10345',<2207>,7:44]\n[@32,210:210=')',<2214>,7:49]\n[@33,211:211=';',<2231>,7:50]\n[@34,213:212='<EOF>',<-1>,8:0]"
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def get_quoted_value (line)
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first_quote = line.index('\'')
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last_quote = line.rindex('\'')
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if first_quote and last_quote then
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return line[first_quote+1..last_quote-1]
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else
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return ''
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end
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end
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input_array = input_string.split("\n")
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#Constants
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COMMAND_LINE = 0 #Command is in first line
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INSERT_MODE = 0
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UPDATE_MODE = 1
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output = Hash.new
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command_mode = nil
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output['command'] = get_quoted_value(input_array[COMMAND_LINE])
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case output['command'].downcase
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when 'insert'
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command_mode = INSERT_MODE
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when 'update'
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command_mode = UPDATE_MODE
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end
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i=0
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input_array.each do |line|
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if line.downcase.index('into') then
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output['table_name'] = get_quoted_value(input_array[i+1]) #table for INSERT is line after INTO statement
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#column_names are after table name and '('
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output['column_names'] = []
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k=i+3
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loop do
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column_name = get_quoted_value(input_array[k])
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break if column_name == ')'
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if column_name != ',' then output['column_names'].push(column_name) end
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k+=1
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end
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end
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if line.downcase.index('values') then
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output['column_values'] = []
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k=i+2
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loop do
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column_value = get_quoted_value(input_array[k])
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break if column_value == ')'
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if column_value != ',' then output['column_values'].push(column_value) end
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k+=1
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end
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end
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if line.downcase.index('select') then
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output['select_columns'] = []
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finish_loop_on_char = 'from'
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k=i+1
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if get_quoted_value(input_array[i+1]) == '(' then
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finish_loop_on_char = ')'
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k+=1
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end
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loop do
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column_value = get_quoted_value(input_array[k])
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break if column_value.downcase == finish_loop_on_char
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if column_value != ',' then output['select_columns'].push(column_value) end
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k+=1
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end
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end
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if line.downcase.index('where') then
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output['where_conditions'] = ''
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finish_loop_on_char = ';'
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k=i+1
|
||||||
|
if get_quoted_value(input_array[i+1]) == '(' then
|
||||||
|
finish_loop_on_char = ')'
|
||||||
|
k+=1
|
||||||
|
end
|
||||||
|
loop do
|
||||||
|
column_value = get_quoted_value(input_array[k])
|
||||||
|
break if column_value.downcase == finish_loop_on_char
|
||||||
|
output['where_conditions'] += column_value
|
||||||
|
k+=1
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
if line.downcase.index('from') then
|
||||||
|
output['from_table'] = get_quoted_value(input_array[i+1]) #table for FROM query is line after FROM statement
|
||||||
|
end
|
||||||
|
i+=1
|
||||||
|
end
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
puts output
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
return
|
||||||
|
#Old try
|
||||||
|
|
||||||
|
end_of_input = input_string.index(';') - 1
|
||||||
|
input_string = input_string[0..end_of_input] + ')'
|
||||||
|
|
||||||
|
tag_list = []
|
||||||
|
tag_levels = []
|
||||||
|
|
||||||
|
tag_level = 0
|
||||||
|
|
||||||
|
input_string.split('(').each do |tag|
|
||||||
|
level_down = tag.count(')')
|
||||||
|
clean_tag = tag.gsub ')', ''
|
||||||
|
#puts clean_tag + "[" + tag_level.to_s + "]"
|
||||||
|
if clean_tag.length > 1 then
|
||||||
|
tag_list.push(clean_tag)
|
||||||
|
tag_levels.push(tag_level)
|
||||||
|
#result[tag_level] = clean_tag + ';' + result[tag_level].to_s
|
||||||
|
tag_level += 1
|
||||||
|
tag_level -= level_down
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
|
||||||
|
#Command : INSERT / UPDATE / DELETE / CREATE / ALTER is on level 3
|
||||||
|
#On level 3, there is statement like "insert_statement INSERT"
|
||||||
|
|
||||||
|
#CONSTANTS :
|
||||||
|
COMMAND_LEVEL = 3
|
||||||
|
|
||||||
|
|
||||||
|
output = Hash.new
|
||||||
|
output['command'] = tag_list[COMMAND_LEVEL].split(' ')[1] #command is after space
|
||||||
|
output['values'] = Hash.new
|
||||||
|
output['where'] = nil
|
||||||
|
output['from'] = nil
|
||||||
|
|
||||||
|
|
||||||
|
values_array = []
|
||||||
|
|
||||||
|
i=0
|
||||||
|
value_counter = 0
|
||||||
|
k=0
|
||||||
|
first_block = true
|
||||||
|
|
||||||
|
tag_list.each do |tag|
|
||||||
|
puts "[" + tag_levels[i].to_s + "] : " + tag
|
||||||
|
|
||||||
|
if tag.index('from_clause') then
|
||||||
|
output['from'] = tag_list[i+8].to_s.split(' ')[1]
|
||||||
|
end
|
||||||
|
|
||||||
|
if tag.index('where_clause') then
|
||||||
|
|
||||||
|
end
|
||||||
|
|
||||||
|
if i < tag_list.length-1
|
||||||
|
if tag_levels[i+1] < tag_levels[i] then
|
||||||
|
k = tag_levels[i] - tag_levels[i+1]
|
||||||
|
parent = tag_list[i-k].rstrip.lstrip
|
||||||
|
clean_tag = tag.split(' ')[1]
|
||||||
|
if parent == "general_table_ref" then
|
||||||
|
output['table_name'] = clean_tag
|
||||||
|
elsif parent == "column_name" then
|
||||||
|
output['values'][clean_tag] = nil
|
||||||
|
values_array.push(clean_tag)
|
||||||
|
elsif parent == "expression" then
|
||||||
|
output['values'][values_array[value_counter]] = clean_tag
|
||||||
|
value_counter+=1
|
||||||
|
i+=1
|
||||||
|
end
|
||||||
|
else
|
||||||
|
end
|
||||||
|
else
|
||||||
|
#Last tag in array, locate parent
|
||||||
|
if first_block then
|
||||||
|
first_block = false
|
||||||
|
else
|
||||||
|
parent = tag_list[i-k-1].rstrip.lstrip
|
||||||
|
clean_tag = tag.split(' ')[1]
|
||||||
|
if parent == "expression" then
|
||||||
|
output['values'][values_array[value_counter]] = clean_tag
|
||||||
|
end
|
||||||
|
end
|
||||||
|
end
|
||||||
|
|
||||||
|
i+=1
|
||||||
|
end
|
||||||
|
|
||||||
|
puts output
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
|
||||||
|
return
|
||||||
|
#Old try #2
|
||||||
|
def parse(input)
|
||||||
|
puts "New input : " + input
|
||||||
|
open_count = input.count('(')
|
||||||
|
close_count = input.count(')')
|
||||||
|
|
||||||
|
|
||||||
|
first_bracket = input.index('(')
|
||||||
|
last_bracket = input.rindex(')')
|
||||||
|
|
||||||
|
if (first_bracket == -1) or (last_bracket == -1) then return '' end
|
||||||
|
#return everything between brackets
|
||||||
|
|
||||||
|
tmp_token = ''
|
||||||
|
result = []
|
||||||
|
level = 0
|
||||||
|
|
||||||
|
new_input = input[first_bracket+1..last_bracket-1]
|
||||||
|
|
||||||
|
# new_input.split('').each do |character|
|
||||||
|
# if character == '(' then level += 1 end
|
||||||
|
# if character == ')' then level -= 1 end
|
||||||
|
# if level == 0 then
|
||||||
|
# puts "ok"
|
||||||
|
# if tmp_token.length > 0 then
|
||||||
|
# result.push(tmp_token)
|
||||||
|
# tmp_token=''
|
||||||
|
# end
|
||||||
|
# else
|
||||||
|
# tmp_token += character
|
||||||
|
# end
|
||||||
|
# end
|
||||||
|
# puts "==="
|
||||||
|
# return result
|
||||||
|
end
|
||||||
|
|||||||
Reference in New Issue
Block a user